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公开(公告)号：US20240291417A1
公开(公告)日：2024-08-29
申请号：US18565657
申请日：2022-02-15
申请人： HITACHI ASTEMO, LTD.
IPC分类号： H02P27/08 , H02P23/14 , H02P25/026
CPC分类号： H02P27/085 , H02P23/14 , H02P25/026
摘要： An inverter control device performs pulse width modulation by selecting one of a synchronous pulse control mode in which a frequency of a carrier wave used in the pulse width modulation is changed in accordance with a rotation speed of the motor and an asynchronous pulse control mode in which the frequency of the carrier wave is constant regardless of the rotation speed of the motor. At the time of switching from the asynchronous pulse control mode to the synchronous pulse control mode, the inverter control device changes a carrier reference phase that is a reference value of a phase of the carrier wave to a different value before and after the switching.
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公开(公告)号：US12063004B2
公开(公告)日：2024-08-13
申请号：US17298346
申请日：2019-11-26
申请人： Lenze SE
发明人： Johannes Brandt , Torsten Wedemeyer , Thomas Bisig
CPC分类号： H02P29/024 , G01R25/005 , G01R31/343 , H02P23/26 , H02P27/085
摘要： A method for monitoring the operation of a frequency converter (1), which is designed to drive an electric motor (2), wherein the method comprises the following steps:
generating phase voltages (u1, u2, u3) for corresponding phase sections (2.1, 2.2, 2.3) of the electric motor (2),
ascertaining a voltage rotating field,
measuring occurring phase currents (i1, i2, i3), ascertaining a current rotating field depending on the measured phase currents (i1, i2, i3),
calculating a phase difference between the voltage rotating field and the current rotating field and/or calculating a frequency difference between the frequency of the voltage rotating field and the frequency of the current rotating field, and
determining a fault state when the phase difference exceeds a phase difference threshold value and/or when the frequency difference exceeds a frequency difference threshold value.-
公开(公告)号：US12047026B2
公开(公告)日：2024-07-23
申请号：US17919397
申请日：2020-05-13
发明人： Hiroya Natsuhara , Isao Kezobo , Tatsuya Mori , Kenta Tanaka , Yusuke Takarada , Yuya Takeuchi , Atsushi Ito , Mamoru Shiraki
IPC分类号： H02P29/028 , H02P27/08
CPC分类号： H02P29/028 , H02P27/085
摘要： To provide a controller for AC rotary machine which can detect current of the normal phase certainly when the short circuit failure of one phase occurs, in an apparatus that a current sensor is connected in series to the positive electrode side switching device or the negative electrode side switching device of an inverter. A controller for AC rotary machine, when determining that the short circuit failure of any one phase occurred, calculates voltage command values of normal n−1 phases, and changes the voltage command values of the normal n−1 phases so that on period of the detection object device of each phase of the normal n−1 phases become longer than or equal to a length necessary for current detection at least at a current detection timing.
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公开(公告)号：US12003203B2
公开(公告)日：2024-06-04
申请号：US17639336
申请日：2020-12-04
申请人： JIANGSU UNIVERSITY
发明人： Jinghua Ji , Yuxuan Du , Wenxiang Zhao , Linsen Huang , Tao Tao
IPC分类号： H02P27/08
CPC分类号： H02P27/085
摘要： A model predictive decomposition control method and device for an open-winding five-phase permanent magnet synchronous motor is provided. The method includes obtaining the voltage component in the stationary coordinate system under the orientation of the rotor magnetic field, synthesizing the virtual voltage vector that can eliminate the voltage vector in harmonic space according to the vector distribution of the five-phase permanent magnet synchronous motor under the voltage source inverter. The open winding permanent magnet synchronous motor topology is equivalent to the superposition of the independent actions of two inverters. The voltage vector generated by a single inverter is predicted through the mathematical model of the motor. The expected increment is a judgment condition to determine whether the open winding system uses one of the two inverters to maintain the normal operation of the open winding system, or the first inverter is clamped and the second inverter generates the remaining increment.
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5.发明授权公开(公告)号：US11967911B2
公开(公告)日：2024-04-23
申请号：US18320399
申请日：2023-05-19
申请人： Karma Automotive LLC
发明人： Saleh Ziaieinejad , Geng Niu
CPC分类号： H02P23/0077 , B60L15/20 , H02P27/085 , B60Y2200/91
摘要： A voltage saturation prevention algorithm used as at least part of a method of controlling an electric vehicle, wherein the electric vehicle comprises an electric motor, a controller, and an inverter. The controller receives a control signal with an instruction to operate the electric motor, then sends a switching signal corresponding to the control signal to the inverter, wherein the inverter provides a plurality of output signals for operation of the electric motor. The method includes determining the expected amplitude of the plurality of output signals based on the instruction to operate the electric motor, calculating the amount of modification of the plurality of output signals required to prevent the expected amplitude from reaching a saturation value, and modifying, based on the calculation, the instruction to operate the electric motor to prevent the expected amplitude from reaching the saturation value. The method is implemented in software, without any additional hardware.
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公开(公告)号：US11955914B2
公开(公告)日：2024-04-09
申请号：US17716428
申请日：2022-04-08
申请人： OMRON Corporation
发明人： Takeshi Kiribuchi
CPC分类号： H02P27/085 , H02P6/08 , H02P7/28
摘要： Voltage fluctuations on a power feeding path for feeding power to a motor controller are reduced. A processing apparatus reduces voltage fluctuations on a power feeding path for feeding power from a direct current power supply to at least one motor controller. The apparatus includes a filter circuit and a controller. The filter circuit includes a plurality of predetermined units each including a circuit element and a semiconductor switch. The circuit element includes at least one predetermined passive element. The semiconductor switch controls a current to be fed to the circuit element. The filter circuit is connected to the power feeding path. The controller controls switching of the semiconductor switch included in each of the plurality of predetermined units in the filter circuit to reduce voltage fluctuations or current fluctuations of direct current on the power feeding path.
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公开(公告)号：US11949358B2
公开(公告)日：2024-04-02
申请号：US17578937
申请日：2022-01-19
发明人： Takeshi Nitta
IPC分类号： H02P1/04 , H02M7/5395 , H02P27/08
CPC分类号： H02P27/085 , H02M7/5395
摘要： A control circuit receives a command from outside and causes an arithmetic unit to perform arithmetic operation M times (M is an integer of 2 or more) by using input data from outside and calculated data held in a memory, thereby making the arithmetic unit and the memory function as an IIR filter. The IIR filter is a filter capable of determining output data by arithmetic operation of K times out of the M times (K
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公开(公告)号：US20240088816A1
公开(公告)日：2024-03-14
申请号：US18266997
申请日：2022-02-08
发明人： Subrata SAHA , Keisuke NISHIMURA , Kyohei KAWAMURA
IPC分类号： H02P27/08
CPC分类号： H02P27/085
摘要： A rotating electrical machine control device shifts a control system to synchronous five-pulse control when an operating point crosses a second boundary from a state in which asynchronous pulse-width modulation control is being executed, and shifts the control system to the asynchronous pulse-width modulation control when the operating point crosses a first boundary from a state in which the synchronous five-pulse control is being executed. The first boundary is set such that the number of switching pulses per unit rotational speed by the synchronous five-pulse control immediately before the operating point crosses the first boundary is smaller than the number of the switching pulses per unit rotational speed by the asynchronous pulse-width modulation control immediately after the operating point crosses the first boundary.
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9.发明公开公开(公告)号：US20240063745A1
公开(公告)日：2024-02-22
申请号：US18452363
申请日：2023-08-18
发明人： John W. PARSELS , Babak MAZDA
IPC分类号： H02P27/08
CPC分类号： H02P27/085 , H02P2201/09
摘要： A boost circuit and method is described for supplying a boost voltage to a rotor of the electric machine, just as the electric machine is pulsed on, the boost voltage aids the rotor in quickly overcoming its start-up inductance, rapidly turn on the rotor. As a result, much faster transition times are realized each time the electric machine transitions from the off state to the on state at the start of a pulse. By reducing the transition time, the overall efficiency of the electric machine is significantly improved.
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公开(公告)号：US20240063732A1
公开(公告)日：2024-02-22
申请号：US18259542
申请日：2021-12-16
申请人： TATA ELXSI LIMITED
CPC分类号： H02P6/10 , H02P21/10 , H02P21/22 , H02P27/085 , H02P2203/03 , H02P2209/07 , H02P2209/13
摘要： A motor controller (100) is provided for smooth operation of an electric motor (102), which mitigates torque ripple, noise and vibration effects, and increases a life span of the motor (102). The motor controller (100) includes a speed controller (120), current transformation units (128 and 130), a current controller (132), and a pulse width modulation (PWM) signal generator (134). The current controller (132) determines a duty cycle of PWM gate signals used for controlling a rotor (104) speed within a particular sector (302A) of the motor (102) based on a reference quadrature-axis current and an actual quadrature-axis current. The PWM signal generator generates the PWM gate signals having the determined duty cycle, controls the rotor (104) speed, and incrementally varies a current speed of the motor (102) to achieve a target speed by modulating operations of a specific pair of inverter switches (502C and 502E) using the PWM gate signals.
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