公开(公告)号：US20130278185A1

公开(公告)日：2013-10-24

申请号：US13867297

申请日：2013-04-22

Applicant: DENSO CORPORATION

Inventor： Takashi SUZUKI ,  Takeshi ITOH ,  Hirofumi KAKO

IPC: H02P21/14

CPC classification number: H02P21/14

Abstract: A control apparatus for an AC motor includes a current sensor and an estimation section. The current sensor detects current flowing through one phase of the motor. The estimation section repeats an estimation process. In the estimation process, d-axis and q-axis current estimation values are calculated based on the presently detected current of the one phase and a previous current estimation value of another phase of the motor, and a present current estimation value of each phase is calculated based on smoothed values of the d-axis and q-axis current estimation values. The estimation section performs the estimation process based on a phase lag element. The phase lag element is a difference between the presently detected current and a previous current estimation value of the one phase or the previously detected current.

Abstract translation: 用于交流电动机的控制装置包括电流传感器和估计部分。 电流传感器检测流经电机一相的电流。 估计部分重复估计过程。 在估计处理中，基于当前检测到的一相的电流和电动机的另一相的前一个电流估计值来计算d轴和q轴电流估计值，并且各相的当前估计值为 基于d轴和q轴电流估计值的平滑值计算。 估计部分基于相位滞后元件执行估计处理。 相位滞后元件是当前检测到的电流与一相或先前检测电流的先前电流估计值之间的差。

公开(公告)号：US20220255475A1

公开(公告)日：2022-08-11

申请号：US17660914

申请日：2022-04-27

Applicant: DENSO CORPORATION

Inventor： Takashi SUZUKI

IPC: H02P5/60 ,  B62D5/04 ,  H02P27/06 ,  H02M7/537

Abstract: One or more multiphase power converters are connected to a power supply via a high potential line and a low potential line, convert DC power of the power supply into multiphase alternate current power by operations of inverter switching elements, and apply a voltage to each of phase windings of the multiphase winding set. A DC rotating machine switch are made up of two or more legs, each of which is made up of switches on a high potential side and a low potential side connected in series via a DC motor terminal connected to a second terminal that is an end of the DC rotating machine. The DC rotating machine switch makes a voltage of the DC motor terminal variable by switching. A control unit controls operations of the inverter switching elements and the DC rotating machine switch.

公开(公告)号：US20220255474A1

公开(公告)日：2022-08-11

申请号：US17660912

申请日：2022-04-27

Applicant: DENSO CORPORATION

Inventor： Takashi SUZUKI

IPC: H02P5/60 ,  B62D5/04 ,  H02P27/06 ,  B62D1/187 ,  H02M7/537

Abstract: One or more multiphase power converters are connected to a positive electrode and a negative electrode of a power supply via a high potential line and a low potential line, respectively, convert DC power of the power supply into multiphase alternate current power by operations of a plurality of inverter switching elements, and apply a voltage to each of phase windings of a multiphase winding set. A DC rotating machine switch including switches on a high potential side and a low potential side connected in series via a DC motor terminal connected to a second terminal that is an end of the DC rotating machine on an opposite side to a first terminal. The DC rotating machine switch generates a voltage of the DC motor terminal variable by switching. A control unit controls operations of the inverter switching elements and the DC rotating machine switch.

公开(公告)号：US20210226572A1

公开(公告)日：2021-07-22

申请号：US17221360

申请日：2021-04-02

Applicant: DENSO CORPORATION

Inventor： Takashi SUZUKI ,  Daisuke KOBAYASHI ,  Masaya TAKI

IPC: H02P29/024 ,  H02P27/12 ,  B62D5/04 ,  H02P21/22 ,  H02P25/22

Abstract: A current sensor state determination device determines that an abnormality is caused in a current sensor when a sum of phase currents based on current detection values from each of the current sensors in three phases is greater than a first determination value, and determines that no abnormality is caused in the current sensor when the sum of phase currents is equal to or less than the first determination value. The state determination device determines that the current sensor is normal when it is determined that (i) no abnormality is caused in a preset electric angle range equal to or less than one electric-angle cycle of the rotating electric machine and (ii) a value of an electric current flowing in the rotating electric machine in a rotating coordinates system calculated based on the current detection value is equal to or greater than a second determination value.

公开(公告)号：US20200180685A1

公开(公告)日：2020-06-11

申请号：US16702912

申请日：2019-12-04

Applicant: DENSO CORPORATION

Inventor： Takashi SUZUKI ,  Shuji KURAMITSU ,  Nobuyori NAKAJIMA ,  Go ENDOH ,  Haruo SUZUKI ,  Koichi NAKAMURA ,  Yosuke OGI ,  Atsuko OKA

IPC: B62D5/04 ,  B62D15/02 ,  B62D6/00 ,  H02P6/22

Abstract: A steering system in a vehicle includes a plurality of subsystems provided with a control unit. The control unit includes a storage unit storing steer angle information regarding a steer angle of one of a steering mechanism and a steered mechanism when the steering mechanism or the steered mechanism stops, an abnormality determiner determining abnormality of the motor rotation detection value and the detection circuit in the plurality of subsystems at a start time of a motor based on a comparison of at least two parameters, and a steer angle calculator calculating the steer angle based on the parameters having been determined by the abnormality determiner as not abnormal.

公开(公告)号：US20200021219A1

公开(公告)日：2020-01-16

申请号：US16507371

申请日：2019-07-10

Applicant: DENSO CORPORATION

Inventor： Hiroyasu OTAKE ,  Takashi SUZUKI

IPC: H02P21/20 ,  H02P27/04 ,  H02P6/06 ,  B60L15/02

Abstract: A rotation electric machine controller includes: a torque command value acquisition section that acquires a torque command value for a rotation electric machine; and a setting section that sets a negative limit value limiting a d-axis current command value. The setting section sets the limit value having a larger absolute value in a case where the torque command value is large, in comparison to a case where the torque command value is small.

公开(公告)号：US20180037253A1

公开(公告)日：2018-02-08

申请号：US15670992

申请日：2017-08-07

Applicant: DENSO CORPORATION

Inventor： Ryo KANO ,  Takashi SUZUKI

IPC: B62D5/04

CPC classification number: B62D5/0412 ,  B62D5/0406 ,  B62D5/0463 ,  B62D5/0496 ,  H02K11/25 ,  H02K11/33 ,  H02P29/032 ,  H02P29/64 ,  H02P29/68

Abstract: A rotary electrical machine control apparatus is provided which controls drive of a rotary electrical machine having a plurality of winding sets. The apparatus includes inverters that are provided so as to respectively correspond to the winding sets, a temperature detection element that detects a base element that is used as a base for estimation of inverter temperatures, which are temperatures of the inverters, and a control section that has a temperature estimation section that estimates the inverter temperatures based on the base temperature and a temperature change amount generated due to current application to the inverters. On-resistance of the switching elements of the first inverter is smaller than on-resistance of the switching elements of the second inverter. The temperature detection element is disposed in an area, a distance between the area and the first inverter being shorter than a distance between the area and the second inverter.

公开(公告)号：US20170366101A1

公开(公告)日：2017-12-21

申请号：US15624561

申请日：2017-06-15

Applicant: DENSO CORPORATION

Inventor： Takashi SUZUKI

IPC: H02M7/487 ,  H02P21/22 ,  H02M7/5395 ,  H02P21/00 ,  H02P6/16 ,  B62D5/04

CPC classification number: H02M7/487 ,  B60Y2400/61 ,  B62D5/0412 ,  H02M7/5395 ,  H02P6/16 ,  H02P21/0003 ,  H02P21/22 ,  H02P27/08

Abstract: A modulation processing unit performs a down-shift process or an up-shift process. In the down-shift process, a neutral-point voltage is shifted towards a low voltage side such that a smallest phase voltage command value is a lower fixed value that is a first lower limit value or a second lower limit value. In the up-shift process, the neutral-point voltage is shifted towards a high voltage side such that a largest phase voltage command value is an upper fixed value that is a first upper limit value or a second upper limit value. The modulation processing unit selects either of a first fixed value, being the first lower limit value or the first upper limit value, and a second fixed value, being the second lower limit value or the second upper limit value, based on a difference between the phase voltage command values in the down-shift process or the up-shift process.

公开(公告)号：US20140246997A1

公开(公告)日：2014-09-04

申请号：US14149943

申请日：2014-01-08

Applicant: DENSO CORPORATION

Inventor： Takashi SUZUKI

IPC: H02P6/08 ,  H02P21/14 ,  H02P6/16

CPC classification number: H02P21/148 ,  B62D5/046 ,  B62D5/049 ,  H02P6/085 ,  H02P6/16 ,  H02P21/18

Abstract: A control unit of a rotary electric machine control apparatus includes a rotation position calculation section, which calculates a sensor angle by correcting a detection signal of a rotation position sensor based on correction value information specific to each sensor, and a correction value abnormality check section, which checks whether the correction value information is normal. When the correction value information is abnormal, the rotation angle calculation section corrects the detection signal of the rotation position sensor by using default value information in place of the correction value information. Each default value is limited to be different from the correction value within a predetermined range. A current command value calculation section sets a d-axis current command value to zero and fixes a current command phase to 90[°]. The current command phase is changed to be most remote from 0[°] and 180[°] thereby ensuring a tolerable range.

Abstract translation: 旋转电机控制装置的控制单元包括：旋转位置计算部，其通过基于每个传感器特有的校正值信息校正旋转位置传感器的检测信号来计算传感器角度;以及校正值异常检查部， 其检查校正值信息是否正常。 当校正值信息异常时，旋转角度计算部分通过使用默认值信息代替校正值信息来校正旋转位置传感器的检测信号。 每个默认值被限制为与预定范围内的校正值不同。 当前指令值计算部分将d轴电流指令值设置为零并将当前指令相位固定为90 [°]。 当前指令阶段由0 [°]和180 [°]变化最远，从而确保了可容忍的范围。

公开(公告)号：US20140009093A1

公开(公告)日：2014-01-09

申请号：US13934715

申请日：2013-07-03

Applicant: DENSO CORPORATION

Inventor： Takashi SUZUKI

IPC: H02P21/00

CPC classification number: H02P21/0096 ,  H02P21/0003 ,  H02P21/50 ,  H02P25/22 ,  H02P29/032

Abstract: A controller for a multiple-phase rotating machine includes power converters for supplying alternating current to winding sets of the rotating machine. A pair of each electrical power converter and a corresponding winding set forms a system. The controller further includes a failure detector for detecting a failure in each system. The failure causes a braking current in the rotating machine. The controller further includes a control section for setting a d-axis current and a q-axis current to drive the power converter in each system. When the failure detector detects the failure in any one of the systems, the control section stops the power converter in the failed system and sets the d-axis current in the normal system in such a manner that an electric current in the failed system is reduced.

Abstract translation: 用于多相旋转机器的控制器包括用于向旋转机器的绕组组提供交流电的功率转换器。 一对每个电功率转换器和相应的绕组组形成一个系统。 控制器还包括用于检测每个系统故障的故障检测器。 故障导致旋转机器中的制动电流。 控制器还包括用于设定d轴电流和q轴电流以驱动每个系统中的功率转换器的控制部分。 当故障检测器检测到任何一个系统中的故障时，控制部分停止故障系统中的功率转换器，并将d轴电流设置在正常系统中，使得故障系统中的电流减小 。