公开(公告)号：US10461681B2

公开(公告)日：2019-10-29

申请号：US16079700

申请日：2017-02-13

Applicant: DENSO CORPORATION

Inventor： Koji Irie

IPC: H02P27/08 ,  H02M7/5395 ,  H02P23/00 ,  H02P101/45

Abstract: A control device stores a plurality of operation patterns associated with each of synchronous numbers and modulation factors, and the synchronous numbers each define the upper limit of the number of switching operations for each switch constituting an inverter. The control device selects an appropriate operation pattern from among the stored operation patterns, and operates each switch on the basis of the selected operation pattern. The control device stores a plurality of operation patterns associated with the same modulation factor for the same synchronous number. In a case where there is a plurality of next patterns as operation patterns corresponding to a next modulation factor, the control device selects, from among the next patterns, an operation pattern with a small change from a currently set operation pattern.

公开(公告)号：US11171591B2

公开(公告)日：2021-11-09

申请号：US16838324

申请日：2020-04-02

Applicant: DENSO CORPORATION

Inventor： Akeru Ishikawa ,  Takuya Kawamura ,  Hideaki Nakayama ,  Koji Irie

IPC: H02P6/00 ,  H02P21/22 ,  H02P25/024 ,  B60L9/18 ,  H02P9/04

Abstract: A control apparatus sets a value of the field current command and a value of the armature related command in accordance with drive information and the setting information stored in the storage unit; the value of the field current command and the value of the armature related command correspond to the obtained drive information. The control apparatus controls a field current flowing through the field winding to the set value of the field current command, and controls a current flowing through the armature winding or a voltage applied to the armature winding to the set value of the armature related command.

公开(公告)号：US10008970B2

公开(公告)日：2018-06-26

申请号：US15485580

申请日：2017-04-12

Applicant: DENSO CORPORATION

Inventor： Hidekazu Takahashi ,  Koji Irie

IPC: H02P21/00 ,  H02P7/00 ,  H02P27/08 ,  H02P21/22 ,  H02P21/20 ,  H02P25/098

CPC classification number: H02P27/08 ,  H02P21/20 ,  H02P21/22 ,  H02P25/098

Abstract: A control apparatus for an AC motor includes an inverter, a voltage-command calculation unit calculating a vector used for giving a command to the inverter, a voltage-waveform specifying unit specifying, as a voltage waveform for operating the inverter based on the vector, a pulse pattern selected from previously stored voltage waveforms, or a voltage waveform of a PWM signal generated by a comparison between a phase voltage and a carrier wave, an amplitude-spectrum extraction unit obtaining a bus current of the inverter to extract an amplitude spectrum of a specific frequency corresponding to a resonance frequency of a circuit through which the bus current flows, and a voltage-amplitude limiting unit limiting an amplitude of the vector so that the amplitude spectrum of the specific frequency becomes less than a threshold, if the amplitude spectrum of the specific frequency correlating with the voltage waveform is the threshold or more.

公开(公告)号：US09906178B2

公开(公告)日：2018-02-27

申请号：US15341603

申请日：2016-11-02

Applicant: DENSO CORPORATION

Inventor： Koji Irie

IPC: H02P1/04 ,  H02P21/20 ,  H02P27/08

CPC classification number: H02P21/20 ,  H02P27/085

Abstract: A control apparatus operates an inverter by overmodulation pulse width modulation control or rectangular wave control to control an output torque of a motor to a command torque. When a first condition is not met, the inverter is operated by the overmodulation pulse width modulation control. The first condition is that an amplitude parameter increases and reaches a determination value. The amplitude parameter is an amplitude of an output voltage vector of the inverter or a modulation factor of the output voltage of the inverter. When the first condition and a second condition are met, operation of the inverter is switched from operation by the overmodulation pulse width modulation control to operation by the rectangular wave control. The second condition is that a change amount in a negative d-axis direction of a current vector of current flowing to the motor after the first condition is met reaches a predetermined amount.

公开(公告)号：US10910974B2

公开(公告)日：2021-02-02

申请号：US16520659

申请日：2019-07-24

Applicant: DENSO CORPORATION

Inventor： Hidekazu Takahashi ,  Koji Irie

IPC: H02P11/06 ,  H02P29/40 ,  H02P4/00 ,  H02P21/34

Abstract: A feedback control switching unit of an inverter control unit selects, based on a magnitude relationship between a predetermined switching determination amount and at least one switching threshold, at least one of feedback control units to thereby execute switching among feedback control modes, such as a current feedback control mode and a torque feedback control mode, of the respective feedback control units for driving of the AC motor. A switching command generating unit generates a switching command for an inverter based on a manipulated variable calculated by the selected feedback control unit. When a torque response request determining unit determines that a required torque responsiveness is high, the feedback control switching unit reduces the number of executions of switching among the feedback control modes.

公开(公告)号：US10291174B2

公开(公告)日：2019-05-14

申请号：US15595002

申请日：2017-05-15

Applicant: DENSO CORPORATION

Inventor： Koji Irie ,  Hidekazu Takahashi

IPC: H02P29/50 ,  H02M3/02 ,  H02M7/42 ,  H02P27/08 ,  H02M1/12 ,  H02M1/15 ,  B60L3/00 ,  B60L15/00 ,  H02P5/74 ,  H02M7/5387

Abstract: In a control apparatus for a power conversion apparatus, a spectrum changing unit changes a spectrum of at least one of bus harmonic components and switch harmonic components so as to meet at least one of a separation condition and a reduction condition. The bus harmonic components are harmonic components superimposed on a voltage of the bus in accompaniment with on-off operations of switches configuring at least one power conversion apparatuses. The switch harmonic components are harmonic components included in a switching pattern of switches configuring the remaining at least one power conversion apparatus. The separation condition is that the frequencies of both harmonic components are separated by a predetermined value or more. The reduction condition is that an amplitude of at least one harmonic component is reduced when the difference between the frequencies of both harmonic components is less than the predetermined value.

公开(公告)号：US09899944B2

公开(公告)日：2018-02-20

申请号：US15593720

申请日：2017-05-12

Applicant: DENSO CORPORATION

Inventor： Koji Irie

IPC: G05B11/36 ,  H02P21/05 ,  H02P6/08 ,  H02P6/15

CPC classification number: H02P21/05 ,  H02P6/085 ,  H02P6/15 ,  H02P21/0003 ,  H02P27/06

Abstract: In a control apparatus for a rotating electric machine, a phase feedback gain is set such that first and second conditions are met. The first condition is that gain margin and phase margin in frequency characteristics of a first loop transfer function are ensured. The second condition is that a gain intersection angular frequency in frequency characteristics of the first loop transfer function is lower than respective resonance angular frequency in frequency characteristics of first and second transfer functions. An amplitude feedback gain is set such that third and fourth conditions are met. The third condition is that gain margin and phase margin in frequency characteristics of a second loop transfer function are ensured. The fourth condition is that a gain intersection angular frequency in frequency characteristics of a second loop transfer function is lower than respective resonance angular frequency in frequency characteristics of third and fourth transfer functions.