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公开(公告)号：US12132423B2
公开(公告)日：2024-10-29
申请号：US18000902
申请日：2020-06-18
发明人： Tatsuya Mori , Akira Furukawa , Kenta Kubo
CPC分类号： H02P21/05 , B62D5/0409 , B62D5/046 , H02P27/08
摘要： To provide a controller for AC rotary electric machine which can suppress the increase in the unwanted sound while reducing noise. A controller for AC rotary electric machine switches n pieces of zero phase candidate voltage values in order for every switching period and calculate as a zero phase voltage value; by defining a deviation between the zero phase voltage value and a time lag zero phase voltage value delaying by a j times value of the switching period, as a zero phase time lag deviation value; j is a natural number which minimizes a difference between a half period of a mechanical resonance period, and the j times value of switching period; an effective value of the zero phase time lag deviation value becomes small, compared with an effective value of AC component of the zero phase voltage value.
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公开(公告)号：US12028002B2
公开(公告)日：2024-07-02
申请号：US17789921
申请日：2020-12-09
发明人： Masaharu Urayama , Yuki Saito
CPC分类号： H02P21/05 , H02P21/0003 , H02P21/20 , H02P21/22 , H02P27/06
摘要： A motor control device capable of improving damping effects of a motor. In a motor control device, a control switching determination unit determines whether or not a control region of a motor is in a voltage saturation region. A voltage command value generator generates a voltage command value of the motor based on a velocity command value and a velocity of the motor. When the control switching determination unit determines that the control region of the motor is in the voltage saturation region, the voltage command value generator determines a voltage vector angle of an output voltage applied to the motor from a total torque command value and a limit value of the maximum voltage capable of being output to the motor, and generates a voltage command value based on the voltage vector angle.
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公开(公告)号：US20240204705A1
公开(公告)日：2024-06-20
申请号：US18555569
申请日：2022-02-15
申请人： HITACHI ASTEMO, LTD.
摘要： A motor control device includes: an inverter that supplies an alternating current to a motor mounted on a vehicle; a current detection unit that detects the alternating current; a position detection unit that detects a rotor phase angle of the motor; and an inverter control unit that controls the inverter based on a current value detected by the current detection unit and the rotor phase angle detected by the position detection unit, wherein the inverter control unit, in response to a timing at which vibration of the vehicle is generated, changes a current phase angle of the motor, and makes a cycle of a waveform of a resultant current of the alternating current irregular.
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公开(公告)号：US11936311B2
公开(公告)日：2024-03-19
申请号：US17426351
申请日：2019-05-30
发明人： Isao Kezobo , Masahiko Orii , Tatsuya Mori , Seiji Sawada , Kenta Kubo
CPC分类号： H02P21/05 , H02P21/141 , H02P21/20
摘要： To provide a controller for motor which can reduce a torque ripple up to high frequency, without amplifying unnecessary noise and vibration. A controller for motor estimates an interlinkage flux based on the applied voltage and the detection value of current; estimates an output torque based on the detection value of current and the estimation value of interlinkage flux; extracts a pulsation component from the estimation value of output torque; calculates a voltage command correction value based on the extraction value of pulsation component; calculates a voltage command after superimposing by superimposing the voltage command correction value on the voltage command basic value; and applies voltage to winding based on the voltage command after superimposing.
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公开(公告)号：US11926373B2
公开(公告)日：2024-03-12
申请号：US16963327
申请日：2018-12-17
申请人： Robert Bosch GmbH
发明人： Stefan Ehlert
摘要： The disclosure relates to a method for operating a steering system, wherein the steering system has at least one electrical three-phase machine, at least one control circuit for actuating the electrical three-phase machine and at least one compensation device, which is operatively connected to the control circuit, for reducing a torque ripple of the electrical three-phase machine, wherein at least one compensation parameter of the compensation device is determined. It is proposed that during the determination of the at least one compensation parameter, at least one operating variable correlated with a pre-commutation angle of the electrical three-phase machine and/or with a supply voltage of the electrical three-phase machine is taken into consideration.
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公开(公告)号：US11784595B2
公开(公告)日：2023-10-10
申请号：US17613159
申请日：2019-07-30
发明人： Tatsuya Mori , Masahiko Orii , Genki Fujii , Yu Hirotani
CPC分类号： H02P21/05 , B62D5/0463 , H02P21/22
摘要： To provide a controller for AC rotary electric machine and an electric power steering apparatus which can superimposes a cancellation current for canceling the torque ripple component on the winding current in feedforward manner and cancel the torque ripple component. A controller for AC rotary electric machine calculates an oscillation voltage command value of q-axis which has the same frequency as the torque ripple component; calculates a reverse phase of the torque ripple component based on the current information and the magnetic pole position; calculates a correction phase corresponding to the phase delay of the actual current with respect to the oscillation voltage command value of q-axis; and sets a phase of the oscillation voltage command value of q-axis to a phase obtained by advancing the reverse phase of the torque ripple component by the correction phase.
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公开(公告)号：US11777427B2
公开(公告)日：2023-10-03
申请号：US17597282
申请日：2020-06-09
发明人： Mitsuru Matsubara , Kazuaki Tobari , Yuuri Takano , Yusuke Uei , Tetsuo Yanada
摘要： An estimated value of frequency of a vibration component for automatically adjusting a control unit that suppresses resonance characteristics of a machine is stably and reliably estimated without depending on the magnitude of amplitude of the vibration component and without risk of arithmetic overflow. A motor control device including an automatic adjustment device that adaptively adjusts a controller included in a motor control system based on a frequency of a vibration component superimposed on a response of the motor control system, the automatic adjustment device including a vibration extraction unit that receives the response of the motor control system and extracts the vibration component from the response of the motor control system; a notch filter unit that receives the vibration component from the vibration extraction unit; an encoding unit; a limiter unit that receives an output of the notch filter unit; an adaptive updating unit; and a unit conversion unit.
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公开(公告)号：US11632067B2
公开(公告)日：2023-04-18
申请号：US17429363
申请日：2019-03-22
摘要： A speed estimating device for an AC motor includes: a model deviation computing unit computing a model deviation based on a voltage, a current, and an estimated angular velocity of the AC motor; a first angular velocity estimating unit computing a first estimated angular velocity based on the model deviation; a second angular velocity estimating unit computing a second estimated angular velocity differing from the first estimated angular velocity in frequency, based on the model deviation; a compensation phase computing unit computing a compensation phase based on a disturbance frequency; and an estimated angular velocity calculator computing an estimated angular velocity of the AC motor based on the first estimated angular velocity and the second estimated angular velocity. Either one of the first estimated angular velocity and the second estimated angular velocity is computed based on the compensation phase.
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9.发明申请公开(公告)号：US20230077771A1
公开(公告)日：2023-03-16
申请号：US17940448
申请日：2022-09-08
申请人： Yilmaz Sozer , Anik Chowdhury , Md Ehsanul Haque
发明人： Yilmaz Sozer , Anik Chowdhury , Md Ehsanul Haque
摘要： A method of operating a motor includes providing an electric system coupled with the motor, the electric system including parallel inverter legs; subjecting the motor to a first interleaving angle when the electric system is under a first condition; and subjecting the motor to a second interleaving angle different from the first interleaving angle when the electric system is under a second condition; wherein the steps of subjecting the motor to the first interleaving angle and subjecting the motor to the second interleaving angle occur within continuous operation of the electric system and the motor.
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公开(公告)号：US11515813B2
公开(公告)日：2022-11-29
申请号：US16365023
申请日：2019-03-26
发明人： Prerit Pramod , Julie A. Kleinau
摘要： According to one or more embodiments, a motor control system that provides torque ripple compensation includes a current regulator that receives a first current command corresponding to an input torque command. The current regulator further generates a first voltage command based on the first current command using a first transformation matrix. The current regulator further receives a second current command corresponding to a torque ripple to be compensated. The current regulator further generates a second voltage command based on the second current command using a second transformation matrix. The current regulator further computes a final voltage command using the first voltage command and the second current command, the final voltage command being applied to a motor.
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