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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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公开(公告)号：US10476423B2
公开(公告)日：2019-11-12
申请号：US15574504
申请日：2015-08-04
IPC分类号： H02P27/08 , G05F1/70 , H02P3/22 , H02P29/024 , F25B49/02 , F25B13/00 , H02P21/34 , H02P21/26 , H02P29/032 , H02P6/20
摘要： A synchronous motor control device includes a voltage detector, a current detector, an inverter main circuit, and an inverter control unit. The inverter control unit includes: a phase current reproduction unit that reproduces a direct current into phase currents flowing to a permanent magnet synchronous motor; a current coordinate transformation unit that transforms the reproduced phase current into current on a control coordinate axis of a rotating coordinate system; a current control unit that calculates a voltage command value of the permanent magnet synchronous motor in such a manner that the current on the control coordinate axis equals a specific value; and a limiter unit that limits the value of the voltage command value.
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公开(公告)号：US10696141B2
公开(公告)日：2020-06-30
申请号：US15744923
申请日：2015-08-04
摘要： A synchronous motor control device includes: a DC power supply; an inverter main circuit; a three-phase synchronous motor; and an inverter control unit that outputs a PWM signal used to control the inverter main circuit. The inverter control unit includes: a PWM signal generation unit; a start-up control unit that outputs a start-up voltage command value to the PWM signal generation unit at the time of start-up; a steady state control unit that calculates a steady state voltage command value in a steady state and outputs the value to the PWM signal generation unit; and a steady state control parameter initial value calculation unit that outputs an initial value of a control parameter to the steady state control unit such that an output voltage vector from the inverter main circuit to the three-phase synchronous motor is consistent before and after switching from the start-up to the steady state.
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公开(公告)号：US10690370B2
公开(公告)日：2020-06-23
申请号：US15511415
申请日：2014-09-26
IPC分类号： H02K11/21 , H02P3/06 , H02P6/18 , F24F11/74 , F24F11/89 , F24F11/76 , H02P5/74 , F24F1/0033 , H02P27/08
摘要： The present invention includes a plurality of fan motors, first and second inverters for individually driving the fan motors, respectively, and one and a common control unit that performs a control arithmetic for each of the fan motors and generates an individual driving signal given to each of the inverters.
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公开(公告)号：US09998049B2
公开(公告)日：2018-06-12
申请号：US15565227
申请日：2015-08-04
发明人： Mitsuo Kashima , Shigeo Umehara
IPC分类号： G05B11/28 , H02P21/22 , H02M7/5395 , H02P25/022 , F25B49/02 , H02P5/74
CPC分类号： H02P21/22 , F25B49/025 , F25B2600/021 , H02M7/5395 , H02P5/74 , H02P21/0021 , H02P25/022
摘要： An inverter control device includes an inverter main circuit, a current detector, a voltage detector that detects a DC voltage between DC bus lines, and an inverter control unit that generates PWM signals to perform on/off control of a plurality of semiconductor switching elements respectively with a DC current and a DC voltage. The unit sets a carrier period of PWM signals to be 1/N times a calculation period in which the PWM signals are generated, performs detection of a DC current detected by the current detector in a 1/2 calculation period immediately before a calculation start timing for generating PWM signals, calculates an output voltage vector based on the detected DC current, and reflects PWM signals generated from the output voltage vector in one calculation period from a 1/2 calculation period after the calculation start timing to 3/2 control calculation periods after the same.
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公开(公告)号：US11031896B2
公开(公告)日：2021-06-08
申请号：US16613150
申请日：2017-07-31
IPC分类号： H02P25/18 , H02P29/024
摘要： An electric quantity of a power supply of a connection switching device for switching the connection state of a motor, or at least one electric quantity which varies with the first-mentioned electric quantity is detected, the result of the detection is used to detect or predict a fall of a voltage of the switching power supply. Based on the result of the detection or prediction, an inverter is so controlled as to stop the motor before the voltage of the switching power supply falls below the minimum voltage required for the operation of the connection switching device. Breakdown of the connection switching device can be prevented.
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公开(公告)号：US09929670B2
公开(公告)日：2018-03-27
申请号：US14891741
申请日：2014-05-26
IPC分类号： H02M1/12 , H02M7/06 , H02M1/42 , H02M3/158 , H02P27/00 , F24F11/00 , H02M1/00 , H02M5/458 , H02M7/08 , H02M7/5387
CPC分类号： H02M7/06 , F24F11/85 , H02M1/12 , H02M1/4225 , H02M3/1584 , H02M5/458 , H02M7/08 , H02M7/53871 , H02M2001/0048 , H02M2003/1586 , H02P27/00 , Y02B70/126 , Y02B70/1491
摘要： A power conversion device is configured to have reactors and is configured to have chopper circuit units, connected in series, that chop the output of a rectifier configured to rectify an AC voltage from an AC power supply. The power conversion device includes: an AC switch disposed on a side closer to the AC power supply than the chopper circuit units; an AC reactor that is connected in parallel to the AC switch; and a switching control unit that stops the switching of the switching elements when the contact of the AC switch is open.
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公开(公告)号：US11437930B2
公开(公告)日：2022-09-06
申请号：US17269673
申请日：2018-09-21
发明人： Shigeya Okada , Mitsuo Kashima
IPC分类号： H02M7/5387 , B62D5/04 , H02M7/5395
摘要： It provides an inverter main circuit converting a DC-voltage into three-phase AC-voltages, a DC-current detection unit detecting the DC-current value of a DC-current flowing in the main circuit, and an inverter control unit generating a drive signal for controlling operation of the main circuit using a voltage command value corresponding to each phase of the three-phase AC-voltages and a triangular-wave carrier. Using a time period during which the triangular-wave carrier monotonically increases or decreases as a unit period, the control unit provides control to alternately use, as the DC-current value for use in computation of the voltage command value, the DC-current value detected in the unit period in which the triangular-wave carrier monotonically increases and the DC-current value detected in the unit period in which the triangular-wave carrier monotonically decreases, for every voltage command value control period set to three times or more and an integer multiple of the unit period.
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公开(公告)号：US11098928B2
公开(公告)日：2021-08-24
申请号：US16098313
申请日：2017-04-18
发明人： Kenji Takahashi , Koichi Arisawa , Mitsuo Kashima
摘要： A speed estimation apparatus for an AC motor includes a model deviation calculation unit, first and second angular velocity estimation units, and an adder. The deviation calculation unit calculates a model deviation based on a voltage, a current, and an estimated angular velocity of the motor. The first angular velocity estimation unit calculates a first estimated angular velocity as a low-frequency component including a DC component of a real angular velocity based on the model deviation. The second angular velocity estimation unit calculates a second estimated angular velocity as a high-frequency component of a real angular velocity based on a specific high-frequency component of the model deviation. The adder adds the first and second estimated angular velocities together. An addition value of the first and second estimated angular velocities is fed back as the estimated angular velocity to the deviation calculation unit.
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公开(公告)号：US11070157B2
公开(公告)日：2021-07-20
申请号：US16607758
申请日：2017-07-21
摘要： An electric motor drive unit includes a winding switching unit that switches a configuration of windings of an electric motor, a winding switching instruction unit that generates an instruction signal for the winding switching unit, and a winding configuration retention unit to which the instruction signal generated by the winding switching instruction unit is input, and if the input instruction signal has a first value, outputs a signal corresponding to the input instruction signal to the winding switching unit, and if the input instruction signal has a second value different from the first value, continues outputting a signal that has been output to the winding switching unit before the reception of the second value, the first value indicating an instruction on the configuration of the windings.
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