Patents Examined by Rina I. Duda
  • Patent number: 11411521
    Abstract: A system for controlling an operation of an induction motor (IM). A controller processor detects a spectrum of a current signal from received sensor data using a module. Obtain a number of rotor bars and a number of pole pairs of the IM to identify a principle slot harmonics (PSH) type IM from stored IM data. Use the PSH-type IM to identify a static eccentricity (SE) fault signature signal located at a secondary PSH frequency of the PSH-type IM. Determine a level of signal strength in the spectrum of the current signal at a location of the secondary PSH frequency, and compare to a SE fault table database to obtain a SE fault level of the PSH-type IM. Compare the SE fault level to a database to obtain a SE fault threshold, and if the SE fault level is outside the SE threshold, generate an interrupt command to the controller.
    Type: Grant
    Filed: October 15, 2020
    Date of Patent: August 9, 2022
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Lei Zhou, Bingnan Wang, Chungwei Lin
  • Patent number: 11404989
    Abstract: A power supply system (1) includes: a drive motor (M) coupled to drive wheels (W); a first inverter (23) which converts DC electric power into three-phase AC electric power; a first current sensor (23I) which generates a current detection signal according to electrical current flowing in the first inverter (23), and a system ECU (8) which executes discharge control for discharging electrical charge of a second smoothing capacitor (C2) connected to the first inverter (23), in a case of a discharge start condition being established. The system ECU (8), in a case of the drive motor (M) rotating upon starting the discharge control, executes the discharge control, after executing three-phase short-circuit control to turn ON all switching elements of an upper arm or all switching elements of a lower arm of the three-phase arm of the first inverter (23), based on the current detection signal of the sensor (23I).
    Type: Grant
    Filed: October 23, 2020
    Date of Patent: August 2, 2022
    Assignees: HONDA MOTOR CO., LTD., HITACHI ASTEMO, LTD.
    Inventors: Yasuhiko Kondo, Yuta Nakamura, Nobukatsu Yamaguchi
  • Patent number: 11404975
    Abstract: An electronic control system of a frequency converter repeatedly receives one nominal base value at a time for the operation of an electrical machine, determines a respective nominal current value using the respective nominal base value, and determines respective control signals for power semiconductors of the frequency converter using the respective nominal current value. The electronic control system controls the power semiconductors according to the determined respective control signals and thereby supplies the electrical machine with electrical energy such that the electrical machine is operated according to the nominal base value. The electronic control system determines the respective nominal current value and/or the respective control signals according to an enabled determination method if and as long as a permissible extent of use for the enabled determination method is larger than 0.
    Type: Grant
    Filed: July 8, 2019
    Date of Patent: August 2, 2022
    Assignee: Siemens Aktiengesellschaft
    Inventor: Tammo Krause-Leipoldt
  • Patent number: 11398791
    Abstract: A method for controlling a three-phase electrical converter includes selecting a three-phase optimized pulse pattern from a table of pre-computed optimized pulse patterns based on a reference flux. The method includes determining a two-component optimal flux from the optimized pulse pattern and a one-component optimal third variable. The method includes determining a two-component flux error from a difference of the optimal flux and an estimated flux estimated based on measurements in the electrical converter. A one-component third variable error is determined from a difference of the optimal third variable and an estimated third variable. The optimized pulse pattern is modified by time-shifting switching instants of the optimized pulse pattern such that a cost function depending on the time-shifts is minimized. The method includes applying the modified optimized pulse pattern to the electrical converter.
    Type: Grant
    Filed: July 13, 2020
    Date of Patent: July 26, 2022
    Assignee: ABB SCHWEIZ AG
    Inventors: Tobias Geyer, Vedrana Spudic, Christof Gutscher, Andrea Rueetschi
  • Patent number: 11398773
    Abstract: An output filter for a power train between a power supply and a motor, the filter comprising a common mode inductor, comprising an inductance for each phase line of the power train, and a resistance for each phase line, connected in parallel with the respective phase line inductance of the common mode inductor.
    Type: Grant
    Filed: December 4, 2019
    Date of Patent: July 26, 2022
    Assignee: GOODRICH CONTROL SYSTEMS
    Inventor: Grzegorz Popek
  • Patent number: 11394340
    Abstract: Passive filters, line replaceable units and a modular power supply are provided. The passive filter comprises an inductor and a diode bridge. The inductor has a first end and a second end. The first end is coupleable to a phase output of an inverter. The diode bridge comprises a first diode and a second diode. The anode of the first diode is coupled to the second end of the inductor and a cathode of the first diode is coupleable to a positive DC bus voltage. The cathode of the second diode is coupled to the second end of the inductor and the anode of the second diode is coupleable to a negative DC bus voltage. The passive filter output is coupleable to cable(s) for an AC electric machine. A reverse recovery charge of the diodes achieves a target DV/DT for an output voltage of the passive filter at operating temperatures.
    Type: Grant
    Filed: April 29, 2020
    Date of Patent: July 19, 2022
    Assignee: BAE Systems Controls Inc.
    Inventors: Robert J. Vovos, Peter A. Carruthers, Benjamin T. Webster
  • Patent number: 11381184
    Abstract: There is provided a driving circuit for a stepping motor, including: a counter electromotive force detection circuit configured to detect a counter electromotive force generated in a coil; a current value setting circuit configured to generate a current set value based on the counter electromotive force; a constant current chopper circuit configured to generate a pulse-modulated signal which is pulse-modulated so that a detected value of a coil current flowing through the coil approaches a target amount based on the current set value; and a logic circuit configured to control a bridge circuit connected to the coil according to the pulse-modulated signal, wherein the driving circuit is configured to output the current set value to outside or to access the current set value from the outside.
    Type: Grant
    Filed: February 12, 2020
    Date of Patent: July 5, 2022
    Assignee: ROHM CO., LTD.
    Inventors: Hiroki Hashimoto, Masanori Tsuchihashi, Mitsuo Okada, Ryota Kobayashi
  • Patent number: 11374522
    Abstract: Disclosed embodiments include an apparatus for closed loop control of a linear resonant actuator comprising a motor drive circuit configured to provide a motor drive signal, a current and voltage sensing circuit coupled to the output terminal of the motor drive circuit and across the motor, and having current sense and a voltage sense outputs. A resonant frequency and back emf extraction circuit receives the current sense and voltage sense outputs, and outputs a resonant frequency signal output and a measured back emf signal output. An actuator model circuit has inputs coupled to the output of the motor drive circuit, the resonant frequency signal output, and a mechanical system quality factor signal generated by an adaptation circuit having an input coupled to the error summing circuit output. The error summing circuit has inputs coupled to the output of the actuator model and the measured back emf signal.
    Type: Grant
    Filed: June 19, 2020
    Date of Patent: June 28, 2022
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: David Hernandez, Supriyo Palit
  • Patent number: 11374524
    Abstract: In order to restrain damage of a component due to rush current, a main relay in a power source circuit is not turned on and does not conduct a power source line even when a heat source microcomputer is activated with a capacitor not sufficiently charged. This configuration avoids start of charging the capacitor without current limitation, to restrain damage of the component due to rush current.
    Type: Grant
    Filed: October 9, 2019
    Date of Patent: June 28, 2022
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Toshiaki Sato, Toshio Yabuki, Narushige Ueda
  • Patent number: 11368106
    Abstract: A pulse width modulator (PWM) of a multi-phase power converter is provided. The PWM includes a signal modulator that corresponds to each phase of the converter. Each signal modulator of the PWM is configured to receive a unique triangle carrier signal, receive a unique sine wave signal, compare the received triangle carrier signal and the received sine wave signal, and output at least one control signal based on a result of the comparison. The control signal controls an inverter that applies pulse width modulation to a DC power for converting the DC power to a multi-phase power, AC harmonics of the multi-phase power filtered by a common mode inductor.
    Type: Grant
    Filed: March 19, 2020
    Date of Patent: June 21, 2022
    Assignee: Hamilton Sundstrand Corporation (HSC)
    Inventor: Huazhen Chai
  • Patent number: 11365717
    Abstract: An arrangement for determining an operation parameter reference for controlling a generator side converter portion coupled to a generator is provided, including: at least one arithmetic element configured to derive at least one harmonic current error by subtracting a generator output current from at least one harmonic current reference; at least one harmonic current controller configured to determine at least one harmonic reference current deviation based on the harmonic current error; another arithmetic element configured to derive a fundamental current error by subtracting the generator output current from a sum of a fundamental current reference and the at least one harmonic current reference; still another arithmetic element configured to determine a modified fundamental current error as a sum of the fundamental current error and the harmonic reference current deviation; a fundamental current controller adapted to determine the operation parameter reference based on the modified fundamental current error.
    Type: Grant
    Filed: February 12, 2020
    Date of Patent: June 21, 2022
    Assignee: SIEMENS GAMESA RENEWABLE ENERGY A/S
    Inventors: Nuno Miguel Amaral Freire, Zhan-Yuan Wu
  • Patent number: 11368111
    Abstract: A circuit comprises a multiphase gate driver to be coupled to a multiphase inverter for driving a multiphase motor. For each phase, the multi-phase gate driver is to, in accordance with a pulse width modulation (PWM) control signal, turn on and off a high side transistor of a given pair of high and low side transistors of the multiphase inverter, discontinue the PWM control signal turn to the high side transistor of the given pair and turn off the high side transistor of the given pair, and turn on the low side transistor of the given pair until a current level through the low side transistor falls below a threshold, at which time, turn off the low side transistor.
    Type: Grant
    Filed: March 3, 2020
    Date of Patent: June 21, 2022
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventor: Manu Balakrishnan
  • Patent number: 11364811
    Abstract: A controller generates a target motor torque and target accessory power information during operation of an electric vehicle. The target motor torque and target accessory power information maintain a DC-link of the electric vehicle powertrain within a safe DC-link operating range. The DC-link has a DC-link voltage that is used to supply an accessory device and a motor. The accessory device is disposed on the electric vehicle and includes vehicle indictors, hydraulics, or any other accessory involved in the operation of the vehicle. The motor drives the vehicle. The controller receives the DC-link voltage, motor speed, desired output torque information, desired accessory power information, and the safe DC-link operating range and generates therefrom the target motor torque and the target accessory power information.
    Type: Grant
    Filed: November 15, 2018
    Date of Patent: June 21, 2022
    Assignee: Motiv Power Systems, Inc.
    Inventors: Elias Stein, Tai-Sik Hwang, Justin Tomlin, James Michael Castelaz
  • Patent number: 11368112
    Abstract: An integrated circuit includes an H-bridge circuit having a first output node for coupling to a high-side terminal of an inductor and a second output node for coupling to a low-side terminal of the inductor. A current source is coupled in series with a current sense FET between a digital upper supply voltage and the first output node, wherein during a fast decay mode, a gate of the current sense FET is coupled to be turned on. A current-sense comparator includes a first input coupled to a sensing node between the current source and the current sense FET, a second input coupled to the lower supply voltage and an output coupled to a driver control circuit.
    Type: Grant
    Filed: December 4, 2019
    Date of Patent: June 21, 2022
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Ganapathi Shankar Krishnamurthy, Venkata Naresh Kotikelapudi
  • Patent number: 11368122
    Abstract: The present invention discloses an anti-stalling circuit, an anti-stalling system composed of same and an anti-stalling method. The anti-stalling circuit includes a motor main circuit and a control circuit; the anti-stalling system includes a substrate rotating synchronously with a passive end and the passive end anti-stalling circuit, the substrate is provided with a notch, the angle of the notch ranges from 150° to 170°, and the proximity switch SQ1 and the proximity switch SQ2 are installed at 180° on both sides of the substrate; and the passive end anti-stalling method is applied to the passive end anti-stalling system. The present invention can greatly reduce the probability of major failures caused by the stalling of a passive end of drive equipment at a limited cost.
    Type: Grant
    Filed: July 9, 2020
    Date of Patent: June 21, 2022
    Assignee: Beijing sanyuan wellhope agriculture technology co
    Inventors: Caimei Shao, Qianhai Yang, Wenyu Li, Genlai Li, Yajing Sun, Penggang Feng, Shaoyong Guo, Weiwu Shen, Weijie Feng, Yan Liu
  • Patent number: 11362603
    Abstract: The disclosure relates to a method for reducing the torque ripple and noise evolution in an EC motor with single-phase feed by buffer-storing electrical energy in the EC motor, which is embodied with a power factor correction circuit (PFC) having a capacitor (Cz) at the power supply system input for a specific power supply system AC voltage UN, wherein the capacitance of the capacitor is dimensioned such that when the power supply system AC voltage UN is applied, a pulsating DC voltage is generated in a link circuit (Z), wherein the pulsating electrical energy generated as a result is stored by means of a primary regulation of the id current component as magnetic energy in the EC motor at least for a predefined time period.
    Type: Grant
    Filed: November 7, 2018
    Date of Patent: June 14, 2022
    Assignee: ebm-papst Mulfingen GmbH & Co. KG
    Inventor: Ralph Wystup
  • Patent number: 11356048
    Abstract: A method and a converter for controlling a multi-phase electric machine are disclosed. Each phase voltage of the electric machine is generated with two electronic switches interconnected to form a half bridge. The switching statuses of the half bridges are controlled with space vector modulation. A minimum dwell time is predefined, and each switching status, represented by an active basic voltage space vector, of the half bridges is maintained at least for the minimum dwell time.
    Type: Grant
    Filed: October 22, 2019
    Date of Patent: June 7, 2022
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventor: Benno Weis
  • Patent number: 11356041
    Abstract: A motor starter and a method for starting an electric motor are disclosed. In an embodiment, the motor starter includes a phase gating unit and a control unit. The phase gating unit is configured to be deactivated via the control unit after an activity period of the phase gating unit has elapsed and is configured to be deactivated during operation after the activity period has elapsed.
    Type: Grant
    Filed: June 24, 2020
    Date of Patent: June 7, 2022
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventor: Willi Boeke
  • Patent number: 11349411
    Abstract: The invention relates to an adjustment of a PWM frequency in a power converter in accordance with the input voltage of the power converter. By means of the adjustment of the PWM frequency in the power converter in accordance with the input voltage, a ripple on the input side of the power converter can be varied. In particular, it is possible, in the case of high input voltages, to minimize the ripple by adjusting the PWM frequency and thus to reduce the sum of the input voltage and the ripple.
    Type: Grant
    Filed: August 9, 2018
    Date of Patent: May 31, 2022
    Assignee: Robert Bosch GmbH
    Inventors: Florian Einsele, Helge Sprenger
  • Patent number: 11349423
    Abstract: A timer circuit for use with a dual lane motor controller has two motor controllers, each motor controller generating PWM drive signals having a period defined by a respective timer of the timer circuit. The timer circuit comprises a first processing circuit associated with the first motor controller and comprising a first oscillator circuit, a first timer which outputs a first timer signal each time the oscillator circuit has completed a set integer number N of oscillations, and a second processing circuit associated with the second motor controller and comprising a second oscillator circuit.
    Type: Grant
    Filed: September 18, 2018
    Date of Patent: May 31, 2022
    Assignee: ZF AUTOMOTIVE UK LIMITED
    Inventors: Jon Barrie Chalmers, Paul Andrew Weaver