Current Or Voltage Limiting (e.g., Over-voltage Or Over-current Protection, Etc.) Patents (Class 318/400.22)
  • Patent number: 11349420
    Abstract: In a rotary electric machine, magnets provided in a core generate circumferentially arranged magnetic poles. Each magnetic pole defines d- and q-axes. The d-axis represents a center of the corresponding magnetic pole. The rotary electric machine includes an armature including an armature winding. Each magnet includes a magnet body having opposing first and second flux effective surfaces. The first flux effective surface is a surface out of which magnetic flux flows. The second flux effective surface into which magnetic flux flows. The magnet body has a thickness defined as a minimum distance between the first and second flux effective surfaces. The magnet body has easy axes of magnetization. A length of a line along at least one of the easy axes of magnetization between the first and second flux effective surfaces is longer than the thickness of the magnet body.
    Type: Grant
    Filed: February 3, 2020
    Date of Patent: May 31, 2022
    Assignee: DENSO CORPORATION
    Inventor: Yuki Takahashi
  • Patent number: 11290050
    Abstract: An apparatus for protecting an electrical machine in the event of a fault, the electrical machine having six phase terminals includes a monitoring unit for detecting a fault of the electrical machine and a switchover unit for switching the electrical machine from a normal operating state into a short-circuit operating state if a fault of the electrical machine is detected. The switchover unit is designed to short-circuit the six phase terminals of the electrical machine asynchronously in accordance with a predefined pattern.
    Type: Grant
    Filed: March 27, 2019
    Date of Patent: March 29, 2022
    Assignee: Bayerische Motoren Werke Aktiengesellschaft
    Inventor: Igor Gusyev
  • Patent number: 11171595
    Abstract: A method for detecting an imbalance in a synchronous motor drive, the method including reading an output voltage signal, and extracting a signature of a parameter imbalance from the output voltage signal. The parameter imbalance is in the synchronous motor drive. Responsive to extracting the signature of the parameter imbalance, the method further includes identifying a certain parameter having the parameter imbalance based on an operating condition of a synchronous motor controlled by the synchronous motor drive, and determining at least one phase of the synchronous motor in which the certain parameter is manifesting the parameter imbalance.
    Type: Grant
    Filed: November 27, 2019
    Date of Patent: November 9, 2021
    Assignee: Steering Solutions IP Holding Corporation
    Inventor: Prerit Pramod
  • Patent number: 11095244
    Abstract: A motor drive device receiving AC power supplied from an AC source and driving a motor includes: a converter circuit converting the AC power into DC power; an inverter circuit converting the DC power into AC power to drive the motor; and a current detector detecting input current flowing on the AC side of the converter circuit. The motor drive device also includes a converter device and an inverter device. The converter device includes a control unit performing control such that input current or input power supplied to the converter circuit does not exceed an upper limit, based on a value detected by the current detector. The inverter device includes a control unit detecting voltage of a DC bus connecting the converter circuit and the inverter circuit, and limiting the output power of the inverter circuit when a detection value of the bus voltage decreases to a set lower limit.
    Type: Grant
    Filed: February 19, 2019
    Date of Patent: August 17, 2021
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Satoshi Taira, Yoshitomo Hayashi
  • Patent number: 10910970
    Abstract: A motor and a method of operating the motor uses an encoder disk attached to the rotor of the motor and an encoder reader positioned to optically obtain rotational information of the rotor. The encoder disk and the encoder reader are located within an interior region of the stator of the motor in which the rotor is positioned to rotate.
    Type: Grant
    Filed: June 21, 2019
    Date of Patent: February 2, 2021
    Assignee: ARCUS TECHNOLOGY, INC.
    Inventor: Christopher C. Chang
  • Patent number: 10894307
    Abstract: A method for operating a power tool having a motor for removing a screw from a counterpart is disclosed. A rotary element connects to the power tool to the screw. In a first section, if a first power limit is exceeded for a first duration, a change is made to a second section in which a temporal profile of the power is recorded for a second duration. A change is made into a third region when the power is above a second power limit for the second duration and a temporal fluctuation of the power is within a fluctuation value. A third power limit is determined based on power recorded in the second section. A change is made from the third section into a fourth section when the power drops below the third power limit within a third duration. In the fourth section, the power of the motor is reduced.
    Type: Grant
    Filed: November 30, 2016
    Date of Patent: January 19, 2021
    Assignee: Robert Bosch GmbH
    Inventors: Fanghui Zhou, Inn Kean Chong
  • Patent number: 10822024
    Abstract: Technical solutions are described for current sensor fault mitigation for systems with permanent magnet DC drives. An example power steering system includes a brush motor, and a motor control system that generates an amount of torque using the brush motor, the amount of torque corresponding to a torque command. The motor control system includes a current sensor fault detector that detects a current sensor fault associated with a current sensor used to measure a current across the brush motor. The motor control system further includes a velocity observer that computes an estimated motor velocity in response to the current sensor fault. The motor control system further includes a feedforward controller that generates a current command for generating the amount of torque using the brush motor, the current command generated using the estimated motor velocity.
    Type: Grant
    Filed: November 6, 2017
    Date of Patent: November 3, 2020
    Assignee: Steering Solutions IP Holding Corporation
    Inventors: Prerit Pramod, Rakesh Mitra, Rangarajan Ramanujam
  • Patent number: 10797623
    Abstract: The conventional semiconductor device requires use of a separate vibration sensor or the like to detect a rotation abnormality of a motor. According to an embodiment, a semiconductor device includes: a resolver rotation angle conversion circuit that obtains a rotation angle signal indicative of a rotation angle of the motor obtained from a resolver that measures the rotation angle of the motor and generates rotation angle information by converting the rotation angle signal to a digital value; a motor rotation angle conversion circuit that generates rotation angle temporal change information by converting the rotation angle information with respect to each phase of the motor to an angular change of the motor; and a determination circuit that determines that an abnormality occurs in the motor in a case of exceeding a fluctuation abnormality detection range of the rotation angle temporal change in the rotation angle temporal change information.
    Type: Grant
    Filed: October 31, 2018
    Date of Patent: October 6, 2020
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventor: Hisaaki Watanabe
  • Patent number: 10747194
    Abstract: A motor control device capable of promptly positioning a driven object at a target position, while suppressing backlash. The motor control device includes an operation command generation section for generating a first operation command and a second operation command for first and second motors to move the driven object; a preload command generation section for generating a first preload command which is added to the first operation command and a second preload command which is added to the second operation command in order that drive axes of the first motor and the second motor provide the driven object forces in opposite directions; and a preload command adjustment section for adjusting the first preload command and the second preload command in order that an absolute value of the above forces is decreased when an operation amount exceeds a predetermined threshold value.
    Type: Grant
    Filed: September 11, 2018
    Date of Patent: August 18, 2020
    Assignee: FANUC CORPORATION
    Inventors: Yusaku Oho, Kazunori Iijima
  • Patent number: 10720860
    Abstract: A power tool including a three-phase DC motor, a power switching network, a power source, and an electronic processor. A first phase of the motor is connected between a first high side electronic switch and a first low side electronic switch, and between a second high side electronic switch and a second low side electronic switch. The first high side electronic switch is parallel to the second high side electronic switch, and the first low side electronic switch is parallel to the second low side electronic switch. The electronic processor receives an indication to stop the motor, and deactivates the first high side electronic switch and the first low side electronic switch, and activates the second high side electronic switch and the second low side electronic switch such that the back-electromagnetic force generated by the motor is connected in a second polarity relative to the power source.
    Type: Grant
    Filed: January 3, 2019
    Date of Patent: July 21, 2020
    Assignee: MILWAUKEE ELECTRIC TOOL CORPORATION
    Inventors: Carl B. Westerby, Timothy R. Obermann, Alex Huber
  • Patent number: 10615722
    Abstract: A system, in some embodiments, includes: a motor; and control logic, coupled to the motor, to determine a duty keep status and a duty cycle threshold based on a received voltage, wherein the duty keep status indicates whether the system is to operate in a duty keep mode or a stop mode, wherein the duty cycle threshold indicates a minimum duty cycle for the motor if the system operates in said duty keep mode and indicates an input duty cycle threshold below which the control logic shuts off the motor if the system operates in the stop mode.
    Type: Grant
    Filed: February 7, 2019
    Date of Patent: April 7, 2020
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventors: Takashi Ogawa, Fumio Kumazawa
  • Patent number: 10577739
    Abstract: Systems and methods for predicting and preventing a cabinet strike event in a washing machine appliance are provided. An exemplary method includes ramping a target speed of a motor from a first speed to a second speed over a ramping period. The method includes computing an average deviation of an observed speed of the motor from the target speed over the ramping period. The method includes computing an average power consumption by the motor over the ramping period. The method includes determining whether both the average deviation is greater than a first threshold value and the average power consumption is greater than a second threshold value. The method includes rebalancing the load if both the average deviation is greater than a first threshold value and the average power consumption is greater than a second threshold value. The method includes performing one or more standard operations if both conditions are not satisfied.
    Type: Grant
    Filed: July 12, 2018
    Date of Patent: March 3, 2020
    Assignee: Haier US Appliance Solutions, Inc.
    Inventors: Gregory Allen Dedow, Christopher Nils Naber, Richard Dean Suel, II
  • Patent number: 10574171
    Abstract: An inductive load control device includes: an electric path configured to connect an external DC power supply and an inductive load drive unit; an opening and closing unit configured to connect or disconnect the electric path; a voltage detection unit configured to detect a voltage difference between ends of the opening and closing unit; and a failure detection unit configured to detect a failure of the opening and closing unit. The opening and closing unit includes: series-connected first and second switching elements; and a diode connected in series with the first switching element and in parallel with the second switching element such that an anode of the diode is disposed in a direction of the DC power supply. The failure detection unit is configured to detect that the second switching element is in a non-conduction failure, based on the voltage difference.
    Type: Grant
    Filed: February 8, 2019
    Date of Patent: February 25, 2020
    Assignee: OMRON AUTOMOTIVE ELECTRONICS CO., LTD.
    Inventors: Toshio Saito, Hiromi Murata
  • Patent number: 10491144
    Abstract: A magnetic pole position detection device of a motor control device includes a calculation unit to estimate a magnetic pole position. The calculation unit generates a voltage pulse command for three-phase connection to actuate all of three legs included in an inverter, and a voltage pulse command for one phase opened to actuate only two of the three legs, and narrows down the estimation range on the basis of a first magnetic pole position estimated value estimated on the basis of a motor current that flows during application of the voltage pulse command for three-phase connection, and a second magnetic pole position estimated value estimated on the basis of a motor current that flows during application of the voltage pulse command for one phase opened.
    Type: Grant
    Filed: March 21, 2017
    Date of Patent: November 26, 2019
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Munehiro Murata, Akira Tanabe
  • Patent number: 10461663
    Abstract: An electric energy storage device which is connected to an electronic circuit is discharged by way of a first and a second electric conductor. A thyristor is provided for discharging the energy storage device. As a result of a fault occurring in the electronic circuit, a discharge current of the energy storage device begins to flow from the energy storage device to the electronic circuit via the first electric conductor and back to the energy storage device via the second electric conductor. The discharge current causes a magnetic field which changes over time to be generated about the first electric conductor and the second electric conductor. The magnetic field penetrates the semiconductor material of the thyristor. By virtue of the temporally varying magnetic field, a current is induced in the semiconductor material of the thyristor, and the thyristor is activated by the induced current.
    Type: Grant
    Filed: September 5, 2016
    Date of Patent: October 29, 2019
    Assignee: Siemens Aktiengesellschaft
    Inventors: Joerg Dorn, Daniel Schmitt, Frank Schremmer, Marcus Wahle
  • Patent number: 10411558
    Abstract: A power tool is provided including a brushless electric motor, a switching arrangement having motor switches and interposed between the electric motor and a power supply, and a controller configured to control a switching operation of the motor switches for driving the electric motor and enforce a current limit on the current delivered to the electric motor. The controller receives a measure of current passing from the power supply to the switching arrangement and takes corrective action to reduce current delivered to the electric motor if the measured current exceeds the current limit. The controller is further configured to initiate a protective response if a number of time intervals in which the measured current exceeds the current limit exceeds a predetermined threshold.
    Type: Grant
    Filed: August 9, 2017
    Date of Patent: September 10, 2019
    Assignee: Black & Decker Inc.
    Inventors: Michael K. Forster, John C. Vanko, Bhanuprasad V. Gorti, Tal Gottesman
  • Patent number: 10363957
    Abstract: Provided is a control device for an electric motor which includes multiple energization systems each including an inverter and coils corresponding to different phases, and which generates a steering assist force in an electric power steering system. Control device diagnoses whether any of inverters 1A and 1B fails, and, when either of the inverters is diagnosed as having failed, reduces the output ratio of the failing inverter to 0% while increasing the output ratio of the normally operating inverter to 100% so as to prevent a drop in the total output from all the inverters after the failure-positive diagnosis. If steering operation is performed after the failure-positive diagnosis, control device performs overheat protection processing for gradually lowering the limit value for the total output from all the inverters in accordance with the sensed temperature of the normally operating inverter.
    Type: Grant
    Filed: September 9, 2015
    Date of Patent: July 30, 2019
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Tomonobu Koseki, Tomishige Yatsugi, Fumiya Iijima
  • Patent number: 10348237
    Abstract: Disclosed is a motor driving device for driving a motor having coil sets that includes energization systems each including a drive circuit, the drive circuits being one-to-one connected to the coil sets; first semiconductor switches disposed in the energization systems in a one-to-one correspondence, each first semiconductor switch lying between a power supply and the corresponding one of the drive circuits; and a second semiconductor switch which connects the power supply and each of the first semiconductor switches in series. Each of the first semiconductor switches includes a parasitic diode of which a forward direction is from the corresponding drive circuit to the second semiconductor switch, and the second semiconductor switch includes a parasitic diode of which a forward direction is from the power supply to the first semiconductor switches.
    Type: Grant
    Filed: February 3, 2017
    Date of Patent: July 9, 2019
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventor: Tomio Sakashita
  • Patent number: 10326391
    Abstract: A motordriver for controlling a brushless DC motor, comprises: an output driver for controlling phase commutation of a power stage; the motordriver can be powered in a pulsed way having a PWM ON and OFF period; a position module for monitoring a position and/or speed of a rotor; at least a part of the position module remains active during the PWM OFF period; a power module configured for powering the active part during the PWM OFF period, comprising an energy storage medium and a blocking module configured such that during the PWM ON period the energy storage medium can be charged by the power supply, and such that the blocking module can block current flowing back to the power supply and block current flowing from the energy storage medium to the motor during the PWM OFF period.
    Type: Grant
    Filed: March 13, 2018
    Date of Patent: June 18, 2019
    Assignee: MELEXIS BULGARIA LTD.
    Inventors: Dirk Leman, Petko Nedelev
  • Patent number: 10270373
    Abstract: A method for pulse-modulated current control of an inductive load current. A first operating mode is implemented when a change in current setpoint value is effected. An initial duty cycle of the pulse modulation is determined and used to operate the inductive load in a second operating mode. In the first operating mode, a switching state of at least one switching element is set depending on whether a current setpoint value of the load current is higher or lower than a current setpoint value of a directly preceding cycle. The switching state is retained until a current limit value is reached and then switched over. The switching state of the switching element is switched over multiple times to generate a prescribed number of periods, and the duty cycle of the pulse modulation is determined based on at least a portion of the prescribed number of periods.
    Type: Grant
    Filed: November 4, 2016
    Date of Patent: April 23, 2019
    Assignee: Continental Teves AG & Co. oHG
    Inventors: Dirk Morschel, Jürgen Müller, Axel Schmitz
  • Patent number: 10259492
    Abstract: An inverter system failure is detected on the basis of the currents of respective phases detected by a current detection unit when carrying out switching control in accordance with a first drive mode in which all switching elements on a lower-side arm are switched on and all switching elements on an upper-side arm are switched off, and the currents of respective phases detected by the current detection unit when carrying out switching control in accordance with a second drive mode in which all of the switching elements on the upper-side arm are switched on and all of the switching elements on the lower-side arm are switched off.
    Type: Grant
    Filed: November 4, 2014
    Date of Patent: April 16, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Isao Kezobo, Yoshihiko Kimpara, Shunsuke Nakajima
  • Patent number: 10203348
    Abstract: A fan detection chip, a fan detection method and a fan detection system are disclosed. In the fan detection system, a fan includes a power terminal and a speed signal terminal, and optionally includes a PWM signal terminal; a power supply module provides a driving voltage to the fan, a PWM signal generating module provides a first PWM signal and a second PWM signal which respectively have different duty cycles, a current sensing module respectively senses a first current and a second current flowing from the power supply module, and a control module compares the first current and the second current. The control module determines the fan to be a PWM fan when the first current is different from the second current, and the control module determines the fan to be a DC fan when the first current is the same as the second current.
    Type: Grant
    Filed: November 15, 2017
    Date of Patent: February 12, 2019
    Assignee: NUVOTON TECHNOLOGY CORPORATION
    Inventor: Chun-Yi Wu
  • Patent number: 10141872
    Abstract: A motor drive circuit for use in driving a motor having two or more phases comprising a motor bridge having, for each phase of the motor, a bridge arm comprising an upper switch and a lower switch that in normal operation may be opened and closed to modulate the voltage applied to the respective phases in response to drive signals from a motor control circuit, at least one solid state phase isolation relay that is provided in series in an electrical path connecting a respective phase of the motor to a respective bridge arm, the relay being closed in normal operation so that current can flow in the phase and is held open in a fault mode of operation to prevent the flow of current in the phase.
    Type: Grant
    Filed: September 9, 2015
    Date of Patent: November 27, 2018
    Assignee: TRW Limited
    Inventor: Ian James Cash
  • Patent number: 10106189
    Abstract: A motor drive control device for electric power steering includes: a switching element for supplying current to a motor; a smoothing capacitor for reducing ripple current due to the switching element; a control board on which a drive circuit for controlling the switching element and a control circuit capacitor are mounted; a control signal line for supplying a control signal from the control board to the switching element; an electric connection member electrically connecting the switching element and the smoothing capacitor; and a heatsink portion in which the switching element is arranged in an embedded manner, wherein the electric connection member is arranged between the switching element and the control board, and the control circuit capacitor and the smoothing capacitor are arranged in a space between the electric connection member and the control board.
    Type: Grant
    Filed: June 12, 2015
    Date of Patent: October 23, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hiroyasu Iwabuki, Kosuke Nakano
  • Patent number: 10103538
    Abstract: A driver circuit provides power from a power source to a load. The driver circuit includes a surge protector, an input stage (e.g., full wave rectifier), a controller, an overvoltage protection circuit, and an output stage (e.g., a half bridge inverter). The input stage receives power from the power source and provides a direct current (DC) power rail. The controller operates the output stage to provide power from the DC power rail to the load. The overvoltage protection circuit shuts down the controller when the DC power rail exceeds a predetermined voltage. This ceases operation of the output stage, protecting the output stage from damage while the DC power rail is above the predetermined voltage.
    Type: Grant
    Filed: September 19, 2014
    Date of Patent: October 16, 2018
    Assignee: Universal Lighting Technologies, Inc.
    Inventors: Wei Xiong, Rohan Dayal, Scott Price
  • Patent number: 10047471
    Abstract: Systems and methods for predicting and preventing a cabinet strike event in a washing machine appliance are provided. An exemplary method includes ramping a target speed of a motor from a first speed to a second speed over a ramping period. The method includes computing an average deviation of an observed speed of the motor from the target speed over the ramping period. The method includes computing an average power consumption by the motor over the ramping period. The method includes determining whether both the average deviation is greater than a first threshold value and the average power consumption is greater than a second threshold value. The method includes rebalancing the load if both the average deviation is greater than a first threshold value and the average power consumption is greater than a second threshold value. The method includes performing one or more standard operations if both conditions are not satisfied.
    Type: Grant
    Filed: December 9, 2016
    Date of Patent: August 14, 2018
    Assignee: Haier US Appliance Solutions, Inc.
    Inventors: Gregory Allen Dedow, Christopher Nils Naber, Richard Dean Suel, II
  • Patent number: 9991833
    Abstract: A control device for rotating electric machine, which controls a rotating electric machine as a charging electric generator, using an inverter circuit, the control device including: an energization amount generating unit for generating a first electric generation mode in which an energization amount for a field winding and an energization amount for an armature winding of the rotating electric machine are controlled and the inverter circuit is driven to perform electric generation, and a second electric generation mode in which an energization amount for the field winding is controlled to perform electric generation; and an energization signal generating unit for, on the basis of variation-related information relevant to variation in one of electric generation torque and electric generation current of the rotating electric machine, performing switching between the first electric generation mode and the second electric generation mode, and generating energization signals for the field winding and the armature
    Type: Grant
    Filed: August 31, 2016
    Date of Patent: June 5, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Tomohiro Seki, Masahiro Iezawa, Ryo Nakamura, Yuya Hisano
  • Patent number: 9941823
    Abstract: This disclosure discloses a motor control device configured to control a motor. The motor control device includes an inverter part, a gate driving circuit, a PWM generation circuit, at least one gate buffer, and a control part. The inverter part is configured to convert direct current into alternate current in response to a motor drive command. The gate driving circuit is configured to drive the inverter part. The PWM generation circuit is configured to generate a PWM signal applied to the gate driving circuit. The at least one gate buffer is disposed between the gate driving circuit and the PWM generation circuit. The control part is configured to apply a test signal to the gate buffer to determine abnormality of the gate buffer.
    Type: Grant
    Filed: April 26, 2016
    Date of Patent: April 10, 2018
    Assignee: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Junya Hisamatsu, Taishi Hiromi, Yusuke Tanaka
  • Patent number: 9912163
    Abstract: The present invention relates to a circuit arrangement for mitigating power quality issues. It offers protection to sensitive devices against, for example, voltage sags and swells. The system introduces, for loads connected to an AC power source (e.g. a TV in a home connected to the power grid) a DC power source coupled to a controllable inverter and a controllable switching mechanism. By switching to a series configuration, the DC power source (e.g. a photovoltaic power source) can either draw or supply power in order to mitigate a power quality issue. In normal operation, by switching to a parallel configuration the DC power source can feed the load.
    Type: Grant
    Filed: November 19, 2013
    Date of Patent: March 6, 2018
    Assignee: PHILIPS LIGHTING HOLDING B.V.
    Inventors: Priya Ranjan Mishra, Rakeshbabu Panguloori, Arup Dalal, Sagar Goel
  • Patent number: 9823307
    Abstract: A node energy diagnosis method for a fault of a switched reluctance motor double-switch power converter. By detecting a transient value of a phase current of a switched reluctance motor double-switch power converter, a node energy standard deviation ? is calculated to be used as a fault characteristic quantity, and a main switch lower-tube short-circuit fault of the switched reluctance motor double-switch power converter is diagnosed by adopting a node energy standard deviation ? curve of the phase current of the switched reluctance motor double-switch power converter in the whole rotation speed range. It also can be applied in fault diagnosis when a main switch lower-tube short-circuit fault occurs in two phases or more than two phases of a switched reluctance motor double-switch power converter.
    Type: Grant
    Filed: April 19, 2013
    Date of Patent: November 21, 2017
    Assignee: CHINA UNIVERSITY OF MINING AND TECHNOLOGY
    Inventors: Hao Chen, Xing Wang
  • Patent number: 9738177
    Abstract: Provided is an electric vehicle, including: motors configured to apply braking/driving torques to drive wheels via gear-type speed reducers; a braking apparatus; and a control device configured to calculate, for each drive wheel, a final target torque, which is a sum of a first target torque that is based on a braking/driving operation amount of a driver and a second target torque for controlling a travel behavior of the electric vehicle, and control the motors and the braking apparatus so that an actual braking/driving torque of the drive wheel reaches the final target torque. When the final target torque is a braking torque under a situation in which the first target torque is a driving torque, the final target torque is corrected to a value that is not a braking torque.
    Type: Grant
    Filed: July 28, 2016
    Date of Patent: August 22, 2017
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Hideki Fukudome
  • Patent number: 9722518
    Abstract: Systems and methods are disclosed for improving acceleration performance of an electric vehicle that includes an electric motor for propulsion. An exemplary system may include an inverter configured to drive the electric motor. The inverter may include at least one power electronic device. The system may also include a torque capability controller. The torque capability controller may be configured to receive information indicative of a selection between a first mode and a second mode. The second mode may correspond to a higher torque to be output by the electric motor than the first mode. The torque capability controller may also be configured to apply a switching frequency to the at least one power electronic device. The switching frequency may have a lower value when the received information indicates the selection of the second mode than when the received information indicates the selection of the first mode.
    Type: Grant
    Filed: December 22, 2015
    Date of Patent: August 1, 2017
    Assignee: FARADAY & FUTURE INC.
    Inventors: Steven E. Schulz, Silva Hiti
  • Patent number: 9708747
    Abstract: A washing machine appliance and a method of operation thereof are provided for shifting between different modes such as wash, rinse, and/or spin modes. A clutch is used to shift between the different modes of operation. Alignment of the clutch, particularly the clutch teeth, is provided so as to allow for proper engagement of the clutch and motor or to properly align the clutch teeth for disengagement and locking with locking teeth carried upon e.g., a platform lock.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: July 18, 2017
    Assignee: Haier US Appliance Solutions, Inc.
    Inventors: Edward Simeon Chupka, Stephen Bernard Froelicher, Jeffrey Lynn Jessie, Richard D. Suel, II
  • Patent number: 9680404
    Abstract: An abnormality detection apparatus configured to detect an abnormality of an inverter provided to control a motor generator when a value obtained by performing a predetermined process for a current value representing electric current flowing between an arm included in the inverter and the motor generator is greater than a threshold value, wherein when a reverse voltage by the motor generator is higher than a system voltage, the threshold value is larger than a value obtained by performing the predetermined process for electric current generated by the reverse voltage.
    Type: Grant
    Filed: May 20, 2016
    Date of Patent: June 13, 2017
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Seiya Kataoka
  • Patent number: 9527507
    Abstract: An electronic control unit included in a hybrid vehicle is configured to switch between first limp home travel control and second limp home travel control based on a first temperature difference, a second temperature difference, and a state of charge when abnormality occurs to a cooler. The first temperature difference is a value that is obtained by subtracting an element temperature of a first inverter from a first load rate limit temperature at which load rate limitation is applied to a first motor. The second temperature difference is a value that is obtained by subtracting an element temperature of a second inverter from a second load rate limit temperature at which the load rate limitation is applied to a second motor.
    Type: Grant
    Filed: March 18, 2016
    Date of Patent: December 27, 2016
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tomoko Oba, Masaya Kaji
  • Patent number: 9490730
    Abstract: A circuit for controlling a multiphase SRM motor, comprising for each winding a low-side and a high-side transistor, and a low-side and a high-side diode for, and at least one current sensor, e.g. a single current sensor, arranged in low-side or high-side implementation for measuring a current through a first and second winding, and a controller adapted for configuring the transistors such that: during a first time slot only the first winding is energized while the second winding is freewheeling via a selected freewheeling path, during a second time slot only the second winding is energized while the first winding is freewheeling via a selected freewheeling path, and measuring the first and second current in said time slots. A method of driving said transistors.
    Type: Grant
    Filed: March 26, 2015
    Date of Patent: November 8, 2016
    Assignees: MELEXIS TECHNOLOGIES NV, DRIVEEXPERT GMBH
    Inventors: Sandro Purfuerst, Heiko Grimm, Viktor Petri
  • Patent number: 9481254
    Abstract: Systems and methods are disclosed for improving acceleration performance of an electric vehicle that includes an electric motor for propulsion. An exemplary system may include an inverter configured to drive the electric motor. The inverter may include at least one power electronic device. The system may also include a torque capability controller. The torque capability controller may be configured to receive information indicative of a selection between a first mode and a second mode. The second mode may correspond to a higher torque to be output by the electric motor than the first mode. The torque capability controller may also be configured to apply a switching frequency to the at least one power electronic device. The switching frequency may have a lower value when the received information indicates the selection of the second mode than when the received information indicates the selection of the first mode.
    Type: Grant
    Filed: April 13, 2016
    Date of Patent: November 1, 2016
    Assignee: FARADAY&FUTURE INC.
    Inventors: Steven E. Schulz, Silva Hiti
  • Patent number: 9461568
    Abstract: In a state in which the energization in the first direction is possible between the motor and the drive circuit and the motor is not rotating at high speed, when the phase induced voltage value of the specific phase that is the target of determination is continuously equal to or smaller than the abnormality determination threshold, the abnormality detecting unit determines that an open malfunction has occurred in the relay FET of the specific phase.
    Type: Grant
    Filed: July 2, 2012
    Date of Patent: October 4, 2016
    Assignee: JTEKT CORPORATION
    Inventors: Akihiro Tomita, Satoru Mikamo, Hiroshi Kawamura, Toshihiro Takahashi, Jun Hasegawa, Akira Nambu, Kenichiro Aoki, Eiji Kasai
  • Patent number: 9431920
    Abstract: Zero-voltage switching of a switching element (Q2) is achieved by turning off a switching element (Q1) and then turning on switching element (Q2) while the parasitic diode (DQ2) of switching element (Q2) is turned on. Subsequently, switching element (Q2) is turned off when the current flowing through switching element (Q2) changes from negative to positive (in a direction from the drain towards the source) and the current reaches a prescribed threshold value. Then, zero-voltage switching of switching element (Q1) is achieved by turning on switching element (Q1) while the parasitic diode (DQ1) of switching element (Q1) is turned on.
    Type: Grant
    Filed: April 30, 2013
    Date of Patent: August 30, 2016
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Masato Sasaki
  • Patent number: 9207691
    Abstract: A control apparatus for driving a semiconductor switch of an inverter. A drive circuit generates a driver signal on the basis of a switching signal generated by a control regulation system of the inverter. A driver circuit which is coupled between the drive circuit and a control input of the semiconductor switch is configured to receive the driver signal and to generate, on the basis of the driver signal, a control signal which drives the semiconductor switch. The control signal is fed into the control input of the semiconductor switch. A regulation circuit is coupled to the drive circuit and is configured to detect a voltage signal dependent on the voltage across the semiconductor switch, to generate a regulation signal which is dependent on the voltage signal and is intended to regulate the driver signal, and to feed the regulation signal into the drive circuit.
    Type: Grant
    Filed: June 3, 2013
    Date of Patent: December 8, 2015
    Assignee: Robert Bosch GmbH
    Inventors: Edwin Eberlein, Andreas Schoenknecht
  • Publication number: 20150145449
    Abstract: A rotating electric machine driving apparatus includes a controller section that obtains an electric current detection value and generates instruction signals for switching ON and OFF of switching elements based on the electric current detection value. The rotating electric machine driving apparatus also includes an IC that is provided with a signal amplifier for outputting amplified signals, which are amplified instruction signals output from the controller section. When an abnormal state, in which one of an instruction signal and an amplified signal amplifying the instruction signal is an ON instruction and the other one of the instruction signal and the amplified signal is an OFF instruction, continues for at least an abnormality determination time, an abnormality detector determines an abnormality of the amplified signal, which realizes an appropriate detection of an abnormality of the amplified signal.
    Type: Application
    Filed: November 25, 2014
    Publication date: May 28, 2015
    Inventors: Yasuhiko MUKAI, Hideki KABUNE
  • Publication number: 20150145450
    Abstract: A control circuit for a DC motor, has: a first and second input ports for connection to a DC source; a H-bridge driving circuit, having first and second switches connected in series between the input ports, and third and fourth switches connected in series between the input ports, a first output port between the first and second switches and a second output port between the third and fourth switches, and a shunt circuit and/or a blocking circuit. The motor is connected between the first and second output ports. The shunt circuit is connected between the first second output ports and has a resistance that will decrease in response to BEMF generated by the motor. The blocking circuit is connected in series with the motor between the output ports and has a resistance that increases in response to BEMF generated by the motor.
    Type: Application
    Filed: November 26, 2014
    Publication date: May 28, 2015
    Inventors: Chi Ping SUN, Fei XIN, Xiu Wen YANG, Shing Hin YEUNG, Yun Long JIANG, Yan Yun CUI, Sin Sang WONG, Zhu Qing YI
  • Patent number: 9041327
    Abstract: Apparatus and methods are presented for mitigating overvoltages and limiting reverse motor speeds for motor drive power loss events, in which a first power dissipation circuit is enabled at the motor drive output to limit reverse rotation of a driven motor load when motor drive power is lost, and a second power dissipation circuit in a DC bus circuit is used to mitigate over voltages following restoration of motor drive power.
    Type: Grant
    Filed: June 12, 2013
    Date of Patent: May 26, 2015
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Robert J. Breitzmann, Semyon Royak, John M. Kasunich
  • Patent number: 9035586
    Abstract: A motor driving device for protecting inrush current is disclosed, where the motor driving device includes a resistor, a capacitor, an electronic switch, a rectifier and a driving circuit. The capacitor is connected to the resistor in series. The electronic switch is connected to the resistor in parallel. The rectifier is connected to the resistor and the capacitor in parallel and is electrically connected to a power source. The driving circuit is connected to the resistor and the capacitor in parallel and is electrically connected to a motor.
    Type: Grant
    Filed: February 7, 2013
    Date of Patent: May 19, 2015
    Assignee: DELTA ELECTRONICS, INC.
    Inventor: Wen-Han Lan
  • Publication number: 20150130382
    Abstract: A controller for a brushless direct-current motor having an upstream converter, which has a half-bridge having a pair of switching means for each phase winding of the motor, includes a measuring device or has a signal connection to a measuring device. The measuring device is associated with a half-bridge and by means of the measuring device, the induced voltage, the counterelectromotive force of a phase winding, can be detected for rotor position detection in the current-free state, for which purpose the controller, in an operating mode that causes the braking and in which the switching means cause a short circuit of the phase windings, briefly opens the switching means associated with the measuring device in order to determine a rotor motion.
    Type: Application
    Filed: April 18, 2013
    Publication date: May 14, 2015
    Inventor: Markus Schüssler
  • Publication number: 20150130383
    Abstract: A method for discharging energy stored in a stator of an assisted steering electric motor of a motor vehicle is disclosed. The stator includes at least one electrical phase, where a state of disconnection of said phase with a control device of the stator is controlled by a switch device having at least one field effect transistor. The method involves keeping the field effect transistor in linear mode by controlling the voltage Vgs between the gate and the source of said transistor so as to keep the voltage Vds between the drain and the source of said transistor substantially equal to a reference voltage Vref.
    Type: Application
    Filed: November 14, 2014
    Publication date: May 14, 2015
    Inventors: Michel Plaideau, Ludovic Raynal, Mathieu Bertrand
  • Patent number: 9030136
    Abstract: A motor controlling apparatus including an inverter, a voltage detector, a rotational speed detector, a command value calculating component, an inverter controller, a state detector and an offsetting component. The inverter converts direct-current power to alternating-current power supplied to a motor. The voltage detector detects a direct-current voltage, and the rotational speed detector detects a rotational speed of the motor. The calculating component calculates current and torque command values, and motor rotational speed. The controller provides a control signal to control the inverter based on the current command value. The state detector detects a control state of the inverter, and the offsetting component offsets the detected voltage or rotational speed by an offset amount. The calculating component modifies the current command value based on the offset detected voltage or rotational speed to increase on a negative side a d-axis current command value included in the current command value.
    Type: Grant
    Filed: September 7, 2011
    Date of Patent: May 12, 2015
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Hidehiko Sugita, Ken Ito
  • Patent number: 9024555
    Abstract: A motor control device has an overcurrent test unit to send a first test voltage Vt1 lower than a reference voltage Vref for overcurrent determination and a second test voltage Vt2 not lower than the reference voltage Vref to an overcurrent determination unit when a synchronous motor is not rotated. The motor control device determines that an abnormality occurs in the overcurrent detection unit when the overcurrent determination unit determines that the first test voltage Vt1 causes an overcurrent on the basis of a comparison result, or the second test voltage Vt2 causes no overcurrent on the basis of the comparison result.
    Type: Grant
    Filed: May 27, 2010
    Date of Patent: May 5, 2015
    Assignee: Sanden Corporation
    Inventor: Daisuke Hirono
  • Patent number: RE47713
    Abstract: The present invention provides a switched-mode power converter with regulation demand pulses sent across a galvanic isolation barrier.
    Type: Grant
    Filed: May 31, 2016
    Date of Patent: November 5, 2019
    Assignee: COGNIPOWER, LLC
    Inventors: William H. Morong, Thomas E. Lawson
  • Patent number: RE47714
    Abstract: The present invention provides a switched-mode power converter with regulation demand pulses sent across a galvanic isolation barrier.
    Type: Grant
    Filed: July 6, 2016
    Date of Patent: November 5, 2019
    Assignee: CogniPower, LLC
    Inventors: William H. Morong, Thomas E. Lawson