Patents Examined by Bentsu Ro
  • Patent number: 10511211
    Abstract: A trip reduction tool for a wind turbine power system includes a capacitor assembly configured to provide multiple capacitance levels for the power system, including e.g. a first level of capacitance during a learning phase of the tool. The tool also includes one or more processors communicatively coupled to the capacitor assembly that is configured to monitor a plurality of electrical devices of the power system for trips during the learning phase. When a trip is detected, the processor(s) collects data and determines a location of the trip. When the location of the trip is located in an electrical device that corresponds to a weak link of the power system, the processor(s) determines a second level of capacitance for the power system based on the collected data. In addition, the processor(s) provides the second level of capacitance at the weak link of the power system to reduce future trips of the electrical device.
    Type: Grant
    Filed: August 30, 2018
    Date of Patent: December 17, 2019
    Assignee: General Electric Company
    Inventor: Joseph Lawrence Chacon
  • Patent number: 10505487
    Abstract: A motor control method comprises providing a machine comprising a plurality of windings, a rotor and a stator magnetically coupled to the rotor, coupling a plurality of power converters to the plurality of windings, configuring the plurality of power converters so as to adjust the number of poles of the machine in a low-stress operating mode according to a plurality of operating parameters and after a fault occurs in the machine, configuring the plurality of power converters such that the machine enters a fault tolerant operating mode.
    Type: Grant
    Filed: August 29, 2018
    Date of Patent: December 10, 2019
    Assignee: Quanten Technologies, Inc.
    Inventors: Hengchun Mao, Xuezhong Jia
  • Patent number: 10505474
    Abstract: A motor starting state recognition method and device, and a motor. The method includes sampling the counter electromotive forces of any two phases of a motor, and calculating a linear counter electromotive force of the motor according to the counter electromotive forces of the two phases, acquiring a polarity flag bit of the motor, and determining the starting state of the motor according to the polarity flag bit and the linear counter electromotive force. The state of a motor before starting can be recognized effectively using the method, so that the problem where a motor may not be started normally or the success rate of starting is low under the condition of a favorable/dead wind is effectively solved, and the problem where a motor becomes severely worn out and has a shorter service life after frequent starting due to starting failure is avoided. Moreover, the method is simple and highly accurate, and the success rate and reliability of system starting are effectively improved.
    Type: Grant
    Filed: October 31, 2018
    Date of Patent: December 10, 2019
    Assignee: GUANGDONG WELLING MOTOR MANUFACTURING CO., LTD.
    Inventors: Qian Zhang, Jie Sun
  • Patent number: 10505475
    Abstract: The invention discloses a driving method for single-phase DC brushless motor using sensor only in start-up, comprising: power-up to activate a motor control circuit of a motor; confirming whether the motor is in a rotating state before activation of an excitation? If not, executing a static start-up procedure of using a sensor to detect magnetic poles of the rotor; calculating slope of the BEMF signal to determine the rotation direction of the motor; determining whether the rotation direction of the motor conforming to a predetermined direction; if yes, executing a normal driving procedure; otherwise, executing the static start-up procedure of using a sensor to detect magnetic poles of the rotor. The invention utilizes the present invention utilizes an asymmetric magnetic field caused by a mechanism between a rotor and a stator of a motor to induce a back electromotive force signal and a sensor detection to control rotation direction.
    Type: Grant
    Filed: November 9, 2018
    Date of Patent: December 10, 2019
    Assignee: TRITAN TECHNOLOGY INC.
    Inventors: Sheng-Yu Peng, Pi-Cheng Chen, Shun-Sheng Cheng, Shao-Hua Cheng, Huang-Jen Wang
  • Patent number: 10498268
    Abstract: A method of determining the angular position (?) of a rotor of an N-phase permanent magnet motor (PMM) includes providing a processor having an associated memory, wherein the memory stores an angular position determination (APD) equation or hardware is included implementing the APD equation. The APD equation determines the angular position from N-phase measurements obtained from the stator windings associated with each of the N-phases. A voltage or a current is forced upon the stator terminals of the stator windings for each of the N-phases, a resulting stator current or stator voltage is sensed to provide the N-phase measurements responsive to the forcing of the voltage or current, and the APD equation is used to determine the angular position from the N-phase measurements.
    Type: Grant
    Filed: June 6, 2017
    Date of Patent: December 3, 2019
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: David Patrick Magee, Eric James Thomas
  • Patent number: 10498282
    Abstract: A common mode noise reduction section performs a first noise reduction process in a first system, a second noise reduction process in a second system and a third noise reduction process in the case where the two systems have a phase, a current for which that flows through a stray capacitance is not canceled out in at least one PWM cycle in a current control cycle after the first noise reduction process is performed and the second noise reduction process is performed. The third noise reduction process includes shifting a PWM count for each phase in the first system by a first predetermined amount and shifting a PWM count for each phase in the second system by a second predetermined amount such that the currents for such a phase which flow through the stray capacitances in the two systems cancel out each other in the relevant PWM cycle.
    Type: Grant
    Filed: November 9, 2018
    Date of Patent: December 3, 2019
    Assignee: JTEKT CORPORATION
    Inventor: Hiroshi Sumasu
  • 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: 10483902
    Abstract: A current regulator for a motor controller reduces distortion of the current output to a motor. Feedback signals corresponding to the current present on the motor are transformed into a fundamental and a harmonic reference frame. Notch filters in each reference frame attenuate components of the current feedback signal from the other reference frame. Current regulators in each reference frame receive the filtered current feedback signal in the corresponding reference frame and generate an output signal that is used to regulate the output current to the motor to the desired level of current in the corresponding reference frame. The output signal from the regulator in the harmonic reference frame is transformed to the fundamental reference frame, and the output of the two regulators are combined in a common reference frame to generate a reference signal corresponding to the required voltage output to the motor to achieve desired operation.
    Type: Grant
    Filed: August 29, 2018
    Date of Patent: November 19, 2019
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Gennadi Sizov, Ahmed S. Mohamed Sayed Ahmed
  • Patent number: 10479402
    Abstract: A method for supplying power to an inductive load including an H-bridge switching structure coupled to a power supply and including a first, a second, a third and a fourth switch and current measurement means designed to measure a current through each switch, the power supply method including: a) supplying power to the inductive load, b) reducing an accumulated current in the inductive load. Upon detection of an anomaly: c) identifying the switch that caused a circuit break, d) identifying whether the anomaly was detected during step a) or step b). If an anomaly is detected in step a): e) performing step b) for a third duration, f) identifying the origin of the anomaly, g) if an anomaly is detected in step b): h) identifying the origin of the anomaly.
    Type: Grant
    Filed: September 11, 2017
    Date of Patent: November 19, 2019
    Assignees: Continental Automotive France, Continental Automotive GmbH
    Inventor: Angelo Pasqualetto
  • Patent number: 10476421
    Abstract: A device may select an operation mode based on at least one of a motor speed, a motor transient speed, or a motor power command value. The operation mode may be selected from a group of operation modes including a single pulse mode, a continuous conduction mode, and a variable dwell continuous conduction mode. The device may control a switched reluctance motor using the operation mode.
    Type: Grant
    Filed: August 28, 2018
    Date of Patent: November 12, 2019
    Assignee: Caterpillar Inc.
    Inventors: Ahmed Khalil, Carlos Nino Baron, Chad Brewer, Jackson Wai, Yash Bhatia
  • Patent number: 10472170
    Abstract: A trashcan assembly can include a body portion, a lid portion pivotably coupled with the body portion, and a sensor assembly configured to generate a signal when an object is detected within a sensing region. The sensor assembly can include a plurality of transmitters having a first subset of transmitters and a second subset of transmitters. A transmission axis of at least one transmitter in the first subset of transmitters can be different from a transmission axis of at least one of the transmitters in the second subset of transmitters. An electronic processor can generate an electronic signal to a power-operated drive mechanism for moving the lid portion from a closed position to an open position, such as in response to the sensor assembly detecting the object.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: November 12, 2019
    Assignee: simplehuman, LLC
    Inventors: Frank Yang, David Wolbert, Guy Cohen, Bryce Wilkins
  • Patent number: 10469006
    Abstract: A power adapter for use with a power tool having an electric motor, and configured to supply electric power from an alternating current power supply to the power tool, is provided. The adapter includes a housing and an auxiliary capacitor circuit housed within the housing. The auxiliary capacitor circuit includes an auxiliary capacitor, a switch in series with the auxiliary capacitor, and a switch control circuit. A state of the switch creates either a charging path for the auxiliary capacitor or both the charging path and a discharging path for the auxiliary capacitor, and the switch control circuit is configured to detect voltage associated with the power supply or the power tool and to control state of the switch in accordance with magnitude of the detected voltage.
    Type: Grant
    Filed: July 12, 2018
    Date of Patent: November 5, 2019
    Assignee: Black & Decker Inc.
    Inventors: Pradeep M. Pant, Michael K. Forster, Scott J. Eshleman, Samuel G. Woods, Timothy J. Seeley, Mark T. Cherry
  • Patent number: 10454267
    Abstract: A load protection system and a method of protecting a load. The load protection system includes a PLC transmitter and a PLC receiver, which are configured to communicate a plurality of bits of data, each bit transmitted near a zero-crossing of a voltage on the power lines supplying power to the load, in the form of a high frequency burst of pulses. The pulses are structured in two patterns. The first pattern serves to identify the start of the second pattern, and the second pattern includes the data. The first pattern is unique and not represented within the second pattern. The load may be a motor, and the data may include a parameter value representing a parameter of the motor. A motor controller may evaluate the parameter value to determine whether to institute a warning or alert action, to shut the motor down, or to continue operating.
    Type: Grant
    Filed: June 1, 2018
    Date of Patent: October 22, 2019
    Assignee: Franklin Electric Co., Inc.
    Inventors: Nicholas A. Cooper, Adrian Chavis, Thomas S. Wolf, Zachary K. Foster, Yaritza Brinker, Dalton Paull
  • Patent number: 10437227
    Abstract: A motor drive system includes a power supply unit configured to supply DC power to a DC link, a servo amplifier for drive configured to convert the DC power in the DC link to AC power and supplies the AC power to the servomotor for drive as a driving power, a power storage device configured to store DC power from the DC link or supplies DC power to the DC link, an abnormality detection unit configured to detect the abnormality of the power storage device, and a control unit configured to, when the abnormality detection unit detects the abnormality of the power storage device, control the operation of the servo amplifier for drive such that the output of the servomotor for drive is limited to a value smaller than the output before the abnormality detection by the abnormality detection unit.
    Type: Grant
    Filed: June 1, 2018
    Date of Patent: October 8, 2019
    Assignee: FANUC CORPORATION
    Inventors: Shougo Shinoda, Satoshi Ikai
  • Patent number: 10439525
    Abstract: A motor drive device includes a detecting unit that detects a rotational position of a rotor, a drive waveform generating circuit that generates a drive waveform, a control unit that synchronizes a phase of the rotational position of the rotor and a phase of the drive waveform, and a phase difference setting unit that sets a phase difference between the rotational position and the drive waveform during synchronization. An Apos generating unit calculates and outputs a position count proportional to a rotation amount of the rotor. A Bpos generating unit acquires the position count from the Apos generating unit and converts the count into a count value with the upper limit value as the maximum value. A Cpos generating unit multiplies the count value acquired from the Bpos generating unit by the conversion ratio, and calculates a count value with a predetermined upper limit value as the maximum value.
    Type: Grant
    Filed: May 30, 2018
    Date of Patent: October 8, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yoshihiro Mizuo, Nobuyuki Horie
  • Patent number: 10425029
    Abstract: A motor controller for an electric motor includes a drive circuit that regulates power supplied to a stator of the electric motor to turn a rotor. The motor controller includes a communication interface that receives coefficients. The motor controller includes a processor coupled to the drive circuit. The processor receives an airflow rate demand, computes a speed, computes a torque set point as a function of at least a sum of first and second terms. The first term is defined as the first coefficient multiplied by the airflow rate demand raised to a power greater than one, and the second term is defined as the second coefficient multiplied by the speed raised to a power greater than one. The processor controls the drive circuit based on the torque set point to supply electrical power to the electric motor.
    Type: Grant
    Filed: June 1, 2018
    Date of Patent: September 24, 2019
    Assignee: REGAL BELOIT AMERICA, INC.
    Inventors: Brian L. Beifus, Sanjeev Shirahatti, Paul S. Mullin, Bin Yang
  • Patent number: 10416611
    Abstract: A driving device includes a stepping motor having a rotor, a coil for rotating the rotor, and a processor that drives the stepping motor. The processor generates a driving pulse for rotating the rotor of the stepping motor to a prescribed position, and outputs the driving pulse to the coil; and generates a rotation assistance pulse for rotating the rotor of the stepping motor at a prescribed speed, and outputs the rotation assistance pulse to the coil, after outputting the driving pulse but before EMF is produced by the rotation of the rotor of the stepping motor caused by the driving pulse.
    Type: Grant
    Filed: February 23, 2017
    Date of Patent: September 17, 2019
    Assignee: CASIO COMPUTER CO., LTD.
    Inventor: Hiroyuki Hosobuchi
  • Patent number: 10414045
    Abstract: Disclosed are a device and a method for controlling a motor. According to a specific embodiment of the present disclosure, an input shaft of a motor is provided with a low-resolution absolute position detector and an output shaft of the motor is provided with a low-resolution absolute position detector having a resolution greater than or equal to a reduction gear ratio. An initial offset and an offset are defined accordingly, and a high-resolution output shaft absolute position is derived from a relational expression, which is defined by an input shaft absolute position received at a predetermined time interval, a derived offset, an output shaft absolute position, and the reduction gear ratio, such that it is possible to easily detect the high-resolution output shaft absolute position by using a low-price absolute position detector without the modification or addition of an actuator.
    Type: Grant
    Filed: May 16, 2018
    Date of Patent: September 17, 2019
    Assignee: Korea Atomic Energy Research Institute
    Inventors: Hocheol Shin, Chang-Hoi Kim, Yong-Chil Seo, Jongwon Park, Byung-Seon Choi, Jeikwon Moon
  • Patent number: 10409259
    Abstract: A servomotor control device includes a servomotor, driven body, connection mechanism, first position detection section, second position detection section, and motor control unit. The motor control unit has: a dual position control section that performs semi-closed FB control based on a high-frequency component of a first deviation between a position command value and the position of the servomotor detected by the first position detection section, and full-closed FB control based on a low-frequency component of a second deviation between the position command value and the position of the driven body detected by the second position detection section; an acquisition section that acquires a magnitude of rigidity of the connection mechanism; and a varying section that varies a proportion of the semi-closed FB control to full-closed FB control in the dual position control section, in response to the acquired magnitude of rigidity of the connection mechanism.
    Type: Grant
    Filed: June 4, 2018
    Date of Patent: September 10, 2019
    Assignee: FANUC CORPORATION
    Inventors: Shougo Shinoda, Satoshi Ikai
  • Patent number: 10409250
    Abstract: A servomotor control device includes: a servomotor; a driven body that is driven by the servomotor; a connection mechanism that connects the servomotor and the driven body; a first position detection section that detects a position of the servomotor; a second position detection section that detects a position of the driven body; and a motor control unit, in which the motor control unit includes: a force estimation section that estimates a drive force acting on the driven body at a connection part between the connection mechanism and the driven body; a rigidity estimation section that estimates a magnitude of rigidity of the connection mechanism based on a detected position of the servomotor, a detected position of the driven body, and an estimated drive force; and a rigidity variation detection section that detects a change in rigidity of the connection mechanism, based on the estimated magnitude of rigidity.
    Type: Grant
    Filed: June 4, 2018
    Date of Patent: September 10, 2019
    Assignee: FANUC CORPORATION
    Inventors: Shougo Shinoda, Satoshi Ikai