Patents Examined by Zemenay Truneh
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Patent number: 10284132Abstract: A drive includes: an inverter power circuit that applies power to an electric motor of a compressor from a direct current (DC) voltage bus; and a power factor correction (PFC) circuit that outputs power to the DC voltage bus based on input alternating current (AC) power. The PFC circuit includes: (i) a switch; (ii) a driver that connects a control terminal of the switch to a first reference potential when a control signal is in a first state and that connects the control terminal of the switch to a second reference potential when the control signal is in a second state; and (iii) an inductor that charges and discharges based on switching of the switch. The drive also includes a control module that generates the control signal based on a measured current through the inductor and a predetermined current through the inductor.Type: GrantFiled: April 13, 2017Date of Patent: May 7, 2019Assignee: Emerson Climate Technologies, Inc.Inventors: Joseph G. Marcinkiewicz, Kraig Bockhorst
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Patent number: 10230323Abstract: A lubricating oil temperature sensor to detect a temperature of a lubricating oil is provided in a lubricating oil passage in a speed reducer, a coil temperature sensor to detect a temperature of a motor coil is provided in a stator of an electric motor, and a rotation speed detection sensor to detect a rotation speed of the electric motor is provided. A control device includes: an abnormality detector to detect an abnormality in the lubricating oil temperature sensor; and a lubricating oil temperature estimator to estimate the temperature of the lubricating oil on the basis of a determined relationship using the temperature detected by the coil temperature sensor and the rotation speed detected by the rotation speed detection sensor, when the abnormality detector detects the abnormality in the lubricating oil temperature sensor.Type: GrantFiled: December 15, 2017Date of Patent: March 12, 2019Assignee: NTN CORPORATIONInventor: Kenichi Suzuki
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Patent number: 10228676Abstract: A servo control device according to the present invention performs speed control or torque control for controlling speed or torque of a servo motor based on a speed command or a torque command by an analog input voltage, and performs positional control for controlling a position of the servo motor based on feedback from the servo motor, includes a command switching unit determining that a command voltage by the analog input voltage enters a dead zone of the command voltage which is registered in advance and determined as stopping, and when detecting that the command voltage enters the dead zone, the command switching unit ceases the speed control or the torque control to perform deceleration stop by the positional control by distribution processing of a movement command regarding an actual speed when the speed control or the torque control is ceased as an initial speed.Type: GrantFiled: November 17, 2016Date of Patent: March 12, 2019Assignee: FANUC CORPORATIONInventor: Kouichi Etou
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Patent number: 10205416Abstract: A control unit for driving a motor mainly includes an input circuit for inputting various kinds of information pieces, an output circuit for driving the coil windings of the motor, an MPU for calculating a control amount based on the information from the input circuit and outputting a control signal to the output circuit; the control unit has two pieces each of the input circuit, the output circuit, and the, and can supply respective electric currents to the windings of the motor or can cut off the supply; the MPUs each have a CPU incorporated therein, a trigger circuit for a trigger signal having a predetermined period; the two CPUs synchronize at least control commands in accordance with the trigger signal and output the control commands.Type: GrantFiled: February 24, 2015Date of Patent: February 12, 2019Assignee: Mitsubishi Electric CorporationInventors: Akira Furukawa, Akihiko Mori, Jiro Okada
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Patent number: 10193475Abstract: A method for determining rotor position of a switched reluctance (SR) machine having a rotor and a stator is provided. The method may include injecting a test pulse into one or more idle phases of the SR machine, determining a decoupled flux value based at least partially on a total flux value corresponding to the test pulse and a mutual flux value, and determining the rotor position based at least partially on the decoupled flux value.Type: GrantFiled: May 18, 2015Date of Patent: January 29, 2019Assignee: Caterpillar Inc.Inventors: Seok-hee Han, Carlos Nino Baron, Jackson Wai, Ahmed Khalil, Ernesto Inoa, Jesse Gerdes, James Michael Thorne
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Patent number: 10193487Abstract: There are provided a voltage command calculator that calculates a voltage command value that is a command value of an AC voltage to be applied to a rotary electric machine that is driven by a power conversion device, a carrier wave generator that generates a carrier wave, a comparator that generates a pulse signal to be supplied to the power conversion device on the basis of a comparison result between the voltage command value and the carrier wave, and a reset signal receiving unit that changes a value of the carrier wave into a predetermined value when a predetermined reset signal is input.Type: GrantFiled: July 21, 2017Date of Patent: January 29, 2019Assignee: Hitachi, Ltd.Inventors: Masatoshi Yoshimura, Mamoru Kimura, Noriaki Hino
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Patent number: 10186991Abstract: A drive system with a plurality of electromotive drives, specifically servo drives, the electronics of which are interconnected or connectable by way of a hybrid bridge. The hybrid bridge has a hybrid cable and a plug-in connector on the cable termination side for power conduction and data transmission. There is provided a drive of this type and a hybrid bridge of this type.Type: GrantFiled: November 21, 2016Date of Patent: January 22, 2019Assignee: Baumueller Nuernberg GmbHInventors: Georg Schroedel, Bernd Bormuth
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Patent number: 10164562Abstract: A method of controlling an alternating current (AC) motor includes following steps: (a) providing a voltage to the AC motor, wherein the voltage is a pulse-width modulation (PWM) signal, which is represented by a voltage reference vector; (b) determining that the voltage reference vector is in a distortion region; and (c) in response to determining that the voltage reference vector is in the distortion region, modifying, via a controller, the PWM signal by updating the voltage reference vector every half switching period to avoid the distortion region.Type: GrantFiled: April 12, 2017Date of Patent: December 25, 2018Assignee: GM Global Technology Operations LLCInventors: Anno Yoo, Sung-Yoon Jung
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Patent number: 10131332Abstract: A controller for a brake may comprise a tangible, non-transitory memory configured to communicate with the controller, the tangible, non-transitory memory having instructions stored thereon that, in response to execution by the controller, cause the controller to perform operations comprising receiving, by the controller, a three-phase signal indicating a first duty cycle for a first phase signal, a second duty cycle for a second phase signal, and a third duty cycle for a third phase signal, determining, by the controller, a minimum value based upon the first phase signal, the second phase signal, and the third phase signal, and converting, by the controller, the minimum value to a zero value.Type: GrantFiled: July 24, 2017Date of Patent: November 20, 2018Assignee: Goodrich CorporationInventors: Naison E Mastrocola, Scott R Durkee
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Patent number: 10128722Abstract: An electrical connection structure includes a first conductor, a second conductor, and a conductive spring. The first conductor includes a first plate. The second conductor includes a second plate opposite to the first plate. The conductive spring is provided between the first plate and the second plate so as to be pressed by the first plate and the second plate. The conductive spring includes a plurality of first contact points contacting with the first plate and a plurality of second contact points contacting with the second plate.Type: GrantFiled: November 16, 2016Date of Patent: November 13, 2018Assignee: HONDA MOTOR CO., LTD.Inventors: Yusuke Goto, Hiroo Yamaguchi, Hiroshi Otsuka, Nobuchika Ukai
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Patent number: 10128739Abstract: A first offset voltage which is added to voltage commands in a first three-phase voltage command calculated on the basis of a control command for an AC rotary machine, and a second offset voltage which is added to voltage commands in a second three-phase voltage command calculated on the basis of a control command for the AC rotary machine, are set in such a manner that a period during which one of a first power converter and a second power converter outputs an effective vector and the other thereof outputs a zero vector occurs during a carrier period of a first carrier wave signal and a second carrier wave signal.Type: GrantFiled: February 16, 2015Date of Patent: November 13, 2018Assignee: Mitsubishi Electric CorporationInventors: Tatsuya Mori, Akira Furukawa
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Patent number: 10116240Abstract: The invention relates to a method for jointly controlling asynchronous machines (2; 3) of a motor vehicle (1) having a first asynchronous machine (2) and a second asynchronous machine (3) for driving the motor vehicle (1); an inverter (4), which is designed to supply the first asynchronous machine (2) and the second asynchronous machine (3) with a common stator voltage (5) at a common stator frequency (6).Type: GrantFiled: November 27, 2015Date of Patent: October 30, 2018Assignee: Robert Bosch GmbHInventor: Ekard Grossmann
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Patent number: 10103671Abstract: In a control apparatus for a rotary electric machine, a first manipulation unit manipulates, as control for a predetermined first region with respect to the controlled variable, a voltage phase of a voltage vector applied to an armature winding while controlling a field current to cause a deviation between an amplitude of an induced voltage and an amplitude of a predetermined voltage to be equal to or smaller than a predetermined value, the induced voltage being generated in the armature winding based on rotation of the rotor, the predetermined voltage being applied to the armature winding; A second manipulation unit that manipulates, as control for a second region that is larger than the first region, the field current such that the controlled variable is controlled to the target value.Type: GrantFiled: January 22, 2016Date of Patent: October 16, 2018Assignee: DENSO CORPORATIONInventor: Kiyoshi Fujii
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Patent number: 10103672Abstract: A stator segment for a linear motor-based transport system is developed to the effect that a transmitter for cyclic transmission of a control data record in a first clock cycle also transmits, in addition to transmitting the control data record, a position value in a clock-synchronized manner, wherein a plurality of positions are available as a sequence with a quantity of elements and an element with an index corresponds to a position, where the transmitter unit is configured such that, upon every first clock cycle, the index is incremented commencing from a starting value and an element is transmitted after the control data record, where the transmitter unit is furthermore configured to transmit all elements in one transmission interval, and where the transmission interval corresponds to a multiple of the first clock cycle.Type: GrantFiled: April 17, 2017Date of Patent: October 16, 2018Assignees: Siemens Aktiengesellschaft, Festo AG & Co. KGInventors: Fabian Albert, Marco Gierden, Ralf Hartramph, Michael Jaentsch, Sven Rothe, Carsten Spindler, Andreas Veit
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Patent number: 10093188Abstract: A power converter may include a smoothing capacitor for a high voltage power source; a discharge circuit for the smoothing capacitor, a controller configured to control the discharge circuit by receiving power via a main power line and a backup power line from a sub-power source; a first switch, arranged on the backup power line, and configured to connect the controller to the sub-power source when a controlling voltage, which is higher than a threshold voltage, is applied to an input terminal of the first switch from the controller, and cut off the controller from the sub-power source when the controlling voltage falls; a voltage retaining capacitor connected between the input terminal and a ground; a second switch controlled by the controller, connected between the input terminal and the ground. An external switch is arranged on the main power line. The external switch may be controlled by another device.Type: GrantFiled: July 26, 2017Date of Patent: October 9, 2018Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Nobufumi Mito
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Patent number: 10090789Abstract: To provide a motor control device capable of causing a motor to rotate in any rotation direction, even when leaving the connection state of the motor of a machine tool as standard.Type: GrantFiled: July 24, 2017Date of Patent: October 2, 2018Assignee: FANUC CORPORATIONInventors: Tadashi Okita, Yuuki Morita, Daisuke Tajima
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Patent number: 10075121Abstract: A driver circuit for generating a sequence of pulses of a drive voltage from a supply voltage is described. The drive voltage is used for operating an electrical actuator, such as an electrical engine or machine. The driver circuit comprises means for providing an amplitude indication of an amplitude of the supply voltage, which is used for generating a first pulse of the sequence of pulses. Furthermore, the driver circuit comprises an integration unit configured to integrate the amplitude indication for a duration of the first pulse, thereby generating an integrated voltage. In addition, the driver circuit comprises a comparator configured to compare the integrated voltage with a reference voltage, thereby generating a comparator signal. Furthermore, the driver circuit comprises a control unit configured to terminate the first pulse in dependence of the comparator signal.Type: GrantFiled: June 24, 2016Date of Patent: September 11, 2018Assignee: Dialog Semiconductor (UK) LimitedInventors: Horst Knoedgen, Gary Hague
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Patent number: 10071652Abstract: A vehicle powertrain includes an electric machine, an inverter including an IGBT having a gate configured to flow current through a phase of the electric machine, and a gate driver. The gate driver is configured to supply power onto the gate via a voltage regulated source, and in response to a collector current of the IGBT exceeding a previous steady state current through the phase, transition to a current regulated source to drive the gate. The gate driver may be configured to delay the transition by a predetermined time that is based on a difference between the previous steady state current and a reverse recovery peak current.Type: GrantFiled: May 11, 2016Date of Patent: September 11, 2018Assignee: Ford Global Technologies, LLCInventors: Xi Lu, Chingchi Chen, Zhuxian Xu, Ke Zou
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Patent number: 10069452Abstract: In a motor driving system, a motor driving system is provided which simplifies the system by ceasing ON/OFF control of a commercial driving command, and by performing commercial synchronous transfer and capture control based on a drive speed reference. A system controller performs synchronization control so as to make a drive output coincident with a phase/amplitude of a commercial AC power source when a rotation speed of a motor exceeds a drive speed reference n2, and when a prescribed requirement is satisfied, the commercial AC power source is synchronously transferred, and the motor is driven by the commercial AC power source. In addition, when the drive speed reference is set to n1, and a drive output side switch is closed, the drive output is connected to the commercial AC power source, and when a prescribed requirement is satisfied, the motor is started to be driven at a variable speed (t7), and thereby the synchronous capture is performed.Type: GrantFiled: November 10, 2016Date of Patent: September 4, 2018Assignee: Toshiba Mitsubishi-Electric Industrial Systems CorporationInventor: Toshiaki Oka
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Patent number: 10063165Abstract: An electric motor is connected to a voltage source via a drive circuit and, between the drive circuit and the voltage source, the operating switch is arranged for the switching of the supply voltage (U) of the voltage source as the input voltage (UE) on the drive circuit. Following the switch-out of the electric motor, the input voltage (UE) on the drive circuit is monitored and a gradient of a rising voltage ramp (dU/dt) of the input voltage (UE) is determined. The gradient of the rising voltage ramp (dU/dt) of the input voltage (UE) thus determined is compared with a predefined limiting value and, in the event of an overshoot of the predefined limiting value, the operating switch is detected as closed, and the electric motor is restarted via the drive circuit.Type: GrantFiled: April 14, 2017Date of Patent: August 28, 2018Assignee: Andreas Stihl AG & Co. KGInventors: Kay-Steffen Gurr, Gernot Liebhard, Jens Kloeker, Jochen Siller, Heinrich Leufen