公开(公告)号：US20170294862A1

公开(公告)日：2017-10-12

申请号：US15484574

申请日：2017-04-11

Applicant: DENSO CORPORATION

Inventor： Hidekazu TAKAHASHI

IPC: H02P27/08 ,  H02P21/22

CPC classification number: H02P27/08 ,  B60L11/08 ,  H02M1/44 ,  H02M3/1588 ,  H02M7/53871 ,  H02M2001/007 ,  H02M2007/53876 ,  H02P21/22 ,  H02P27/06 ,  H02P2201/07 ,  Y02B70/1466

Abstract: In a control apparatus for an AC motor, a voltage waveform specifying unit of an inverter control unit specifies a voltage waveform for operating the inverter, based on a voltage vector calculated by a voltage command calculation unit. A spectrum amplitude extraction unit acquires values of bus current of the inverter and extracts the spectrum amplitude of the specific frequency that corresponds to the LC resonance frequency of the converter. A boost/non-boost state judgement unit of a converter control unit determines whether the state required by the converter in the next control cycle is the boost state or the non-boost state. When the spectrum amplitude of the specific frequency, correlated with the voltage waveform, is higher than the judgement threshold value and the converter is in the non-boost state, a voltage command value alteration unit changes the voltage command reference value such that the converter transitions to the boost state.

公开(公告)号：US20170338764A1

公开(公告)日：2017-11-23

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

CPC classification number: H02P29/50 ,  B60L3/003 ,  B60L15/007 ,  B60L2210/10 ,  B60L2210/40 ,  B60L2240/12 ,  B60L2240/421 ,  B60L2240/429 ,  B60L2240/525 ,  B60L2240/526 ,  H02M1/12 ,  H02M1/15 ,  H02M3/02 ,  H02M7/42 ,  H02M7/5387 ,  H02P5/74 ,  H02P27/08 ,  H02P27/085 ,  Y02T10/644 ,  Y02T10/645 ,  Y02T10/7216

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：US20170294863A1

公开(公告)日：2017-10-12

申请号：US15485580

申请日：2017-04-12

Applicant: DENSO CORPORATION

Inventor： Hidekazu TAKAHASHI ,  Koji IRIE

IPC: H02P27/08 ,  H02P21/20 ,  H02P21/22

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：US20160352269A1

公开(公告)日：2016-12-01

申请号：US15169860

申请日：2016-06-01

Applicant: DENSO CORPORATION

Inventor： Hidekazu TAKAHASHI

IPC: H02P6/28 ,  H02P6/08

CPC classification number: H02P6/28 ,  H02P21/20 ,  H02P27/085

Abstract: In an apparatus, a first control unit performs current-feedback control, and a second control unit performs torque-feedback control. The torque-feedback control samples values of each output current at phases. The sampled values of each output current at the phases are referred to as phase-related sampled values of the corresponding output current. The apparatus causes the second control unit to sample values of each output current at the predetermined phases while the first control unit is performing the current-feedback control when switching the current-feedback control to the torque-feedback control. The second control unit uses the values of each output current sampled by the first control unit as the phase-related sampled values of the corresponding output current to start the torque-feedback control when the current-feedback control is switched to the torque-feedback control.

Abstract translation: 在装置中，第一控制单元进行电流反馈控制，第二控制单元进行转矩反馈控制。 扭矩反馈控制在相位处对每个输出电流进行采样。 相位处的每个输出电流的采样值被称为相应输出电流的相位相关采样值。 该装置使得第二控制单元在将电流反馈控制切换到转矩反馈控制的同时，在第一控制单元执行电流反馈控制时，以预定相位采样每个输出电流的值。 当电流反馈控制切换到转矩反馈控制时，第二控制单元使用由第一控制单元采样的每个输出电流的值作为相应的输出电流的相位相关采样值来开始转矩反馈控制 。