公开(公告)号：US20180254734A1

公开(公告)日：2018-09-06

申请号：US15910292

申请日：2018-03-02

Applicant: DENSO CORPORATION

Inventor： Ryo KANO ,  Takashi SUZUKI

IPC: H02P29/02 ,  B62D5/04 ,  H02P21/22 ,  H02P27/08 ,  H02P29/60 ,  H02P29/68

CPC classification number: H02P29/02 ,  B62D5/0409 ,  B62D5/0463 ,  B62D5/0496 ,  H02P21/22 ,  H02P27/08 ,  H02P29/032 ,  H02P29/60 ,  H02P29/68

Abstract: A capacitor current estimating unit estimates a capacitor current based on phase currents. A capacitor temperature estimating unit estimates a capacitor temperature based on the capacitor current. A motor controller can accurately estimate not only a temperature of a switching element but also the capacitor temperature based on the phase currents. As a result, the capacitor does not need to have excessive heat characteristics. Further, a current limiting unit limits a current flowing from a battery to an inverter based on the capacitor temperature. Therefore, an amount of temperature change is not over-estimated due to overheating of the capacitor. As a result, excessive current limitation can be avoided and the performance of the motor can be demonstrated.

公开(公告)号：US20180057047A1

公开(公告)日：2018-03-01

申请号：US15674674

申请日：2017-08-11

Applicant: JTEKT CORPORATION ,  TOYOTA JIDOSHA KABUSHIKI KAISHA ,  DENSO CORPORATION

Inventor： Takahiro TOKO ,  Hiromasa TAMAKI ,  Jun HASEGAWA ,  Shohei FUJITA ,  Kohei YANAI ,  Tatsuya SUZUKI ,  Tatsuya MIYAKE ,  Takashi SUZUKI

IPC: B62D6/00 ,  B62D5/04 ,  B62D5/00 ,  G01L5/22 ,  G01P1/02

Abstract: A steering control device includes a command value setting processing portion configured to set a current command value based on a detection value of steering torque; a feedback processing portion configured to control a voltage applied to a motor so as to control a current flowing through the motor to the current command value, based on an output value of an integral element obtained by using a difference between the current and the current command value; an end determination processing portion configured to determine whether a turning angle of steered wheels has reached a limit angle; and an end-time limit processing portion configured to perform correction to increase a magnitude of the difference, based on a degree of a decrease in a magnitude of a rotational speed of the motor when the end determination processing portion determines that the turning angle has reached the limit angle.

公开(公告)号：US20150214882A1

公开(公告)日：2015-07-30

申请号：US14597004

申请日：2015-01-14

Applicant: Denso Corporation

Inventor： Takashi SUZUKI

IPC: H02P27/08 ,  B62D5/04

CPC classification number: B62D5/046 ,  B60W10/08 ,  B60W20/00 ,  B62D5/049 ,  H02P29/0241 ,  Y02T10/7005 ,  Y02T10/7077

Abstract: A power conversion device includes: an inverter that includes high potential side switching elements connected to a high potential side and low potential side switching elements connected to a low potential side, and converts a current for supplying a rotating electric machine; a current detector having a sensor disposed on at least one of a positive bus for connecting the high potential side switching elements and a positive side of a DC power supply or a negative bus for connecting the low potential side switching elements and a negative side of the DC power supply; an energization device that energizes the sensor without passing through the inverter; and a controller that acquires a current detection value from the current detector, and controls the inverter and the energization device. The energization device energizes the sensor when all of high or low potential side switching elements are off.

Abstract translation: 电力转换装置包括：逆变器，其包括连接到高电位侧的高电位侧开关元件和连接到低电位侧的低电位侧开关元件，并且转换用于供给旋转电机的电流; 电流检测器，其具有设置在用于连接高电位侧开关元件的正母线和用于连接低电位侧开关元件的直流电源或负母线的正侧中的至少一个上的传感器， 直流电源; 通电装置，在不通过逆变器的情况下对传感器通电; 以及控制器，其从电流检测器获取电流检测值，并控制逆变器和通电装置。 当所有高电位或低电位侧开关元件断开时，通电装置使传感器通电。

公开(公告)号：US20140253006A1

公开(公告)日：2014-09-11

申请号：US14202777

申请日：2014-03-10

Applicant: DENSO CORPORATION

Inventor： Takafumi SATOU ,  Takashi SUZUKI

IPC: H02P4/00

CPC classification number: H02P25/22 ,  H02P29/032

Abstract: A power converter is for a rotating electrical machine including first and second winding sets, each of which has coils corresponding to phases of the rotating electrical machine. In the power converter, a first inverter energizes the first winding set, a second inverter energizes the second winding set, a current sensor detects a phase current flowing through each coil, and a control section drives the first and second inverters respectively based on first and second voltage command signals. The first inverter and the first winding set form a first system. The second inverter and the second winding set form a second system. The control section calculates the first and second voltage command signals so that average voltages applied to the first and second winding sets can be different from each other. The failure detector detects whether a short-circuit occurs between the first and second systems based on each phase current.

Abstract translation: 电力转换器是用于包括第一和第二绕组的旋转电机，每个绕组具有对应于旋转电机的相位的线圈。 在功率转换器中，第一变换器使第一绕组组通电，第二变换器对第二绕组组通电，电流传感器检测流过每个线圈的相电流，并且控制部分分别基于第一和第二绕组组驱动第一和第二逆变器， 第二电压指令信号。 第一变频器和第一绕组组形成第一系统。 第二逆变器和第二绕组组形成第二系统。 控制部分计算第一和第二电压指令信号，使得施加到第一和第二绕组的平均电压可以彼此不同。 故障检测器基于每个相电流检测第一和第二系统之间是否发生短路。

公开(公告)号：US20140091743A1

公开(公告)日：2014-04-03

申请号：US14039255

申请日：2013-09-27

Applicant: DENSO CORPORATION

Inventor： Takashi SUZUKI ,  Hirofumi KAKO ,  Takeshi ITOH

IPC: H02P6/12

CPC classification number: H02P6/12 ,  H02P21/14 ,  H02P21/22 ,  H02P29/027

Abstract: A control device for a three-phase AC motor includes: an inverter having switching elements; current sensors for sensing a current in the motor; and a control means having a feedback control operation part for operating a voltage command of each phase and switching the switching elements based on the voltage command. When a positive and negative offset abnormality occurs, the control means executes a positive and negative offset abnormality detection process that the control means compares a value, which is obtained by integrating a variation in a voltage command of each phase over a predetermined detection interval, with a predetermined abnormality threshold value, the voltage command being outputted by the feedback control operation part with respect to a variation in the current caused by the positive and negative offset abnormality.

Abstract translation: 一种用于三相AC电动机的控制装置，包括：具有开关元件的逆变器; 电流传感器，用于感测电机中的电流; 以及控制装置，具有用于操作各相的电压指令的反馈控制操作部，并且基于电压指令切换开关元件。 当发生正负偏移异常时，控制装置执行正偏移异常检测处理和负偏移异常检测处理，控制装置将通过将预定检测间隔的各相电压指令的变化积分而得到的值与通过 预定的异常阈值，由反馈控制操作部分输出的电压指令相对于正偏移异常引起的电流变化。

公开(公告)号：US20140091740A1

公开(公告)日：2014-04-03

申请号：US14039273

申请日：2013-09-27

Applicant: DENSO CORPORATION

Inventor： Takashi SUZUKI ,  Hirofumi KAKO ,  Takeshi ITOH

IPC: H02P21/14

CPC classification number: H02P21/146 ,  H02P21/14 ,  H02P21/22 ,  H02P29/027

Abstract: A control device for a three-phase alternate current motor, includes: a control phase current acquisition means; a monitor phase current acquisition means; a rotation angle acquisition means; a two-phase control current value current calculation means; a one-phase current estimated value estimation means; a voltage command value calculation means; an other phase current estimation means for calculating a monitor or a control phase current estimated value; an abnormality detection means for detecting an abnormality in a monitor phase or a control phase current sensor; and a switching means for switching between a monitoring stop mode, in which the voltage command value is calculated based on the two-phase control current value, and a monitoring mode, in which the voltage command value is calculated based on the one-phase current estimated value, and the abnormality detection means detects the abnormality, at predetermined time intervals.

Abstract translation: 一种用于三相交流电动机的控制装置，包括：控制相电流获取装置; 监视相电流获取装置; 旋转角度获取装置; 两相控制电流值电流计算装置; 一相电流估计值估计装置; 电压指令值计算装置; 用于计算监视器或控制相位电流估计值的另一相电流估计装置; 用于检测监视阶段的异常或控制相电流传感器的异常检测装置; 以及切换装置，用于在基于两相控制电流值计算电压指令值的监视停止模式和基于一相电流计算电压指令值的监视模式之间进行切换 估计值，异常检测装置以预定的时间间隔检测异常。

公开(公告)号：US20200079421A1

公开(公告)日：2020-03-12

申请号：US16559946

申请日：2019-09-04

Applicant: DENSO CORPORATION

Inventor： Ryo KANO ,  Daisuke KOBAYASHI ,  Takashi SUZUKI

IPC: B62D5/04 ,  B62D1/20 ,  B62D3/12 ,  B62D15/02

Abstract: A power steering apparatus has a first actuator provided as a multi-phase rotating electric machine and disposed on a steering column side of an intermediate shaft and a second actuator disposed on a rack gear side thereof. A first ECU controls a drive of the first actuator and detects an abnormality of the first actuator. The first ECU changes an output of the first actuator based on a notification from a communication bus. The first ECU performs an initial diagnosis of the first actuator at a vehicle startup time for detecting abnormality, by supplying an electric power to the first actuator for not providing a torque to a steering wheel.

公开(公告)号：US20200028463A1

公开(公告)日：2020-01-23

申请号：US16509927

申请日：2019-07-12

Applicant: DENSO CORPORATION

Inventor： Haruo SUZUKI ,  Takashi SUZUKI

IPC: H02P29/028 ,  H02P25/22 ,  H02P27/06 ,  B62D5/04

Abstract: A control unit determines a presence or absence of a short-circuit failure with respect to a target switch which is a phase-opening switch to be determined. At this time, after opening all the phase opening switches, the control unit drives an inverter to connect a power supply line provided with the target switch among the phase opening switches to ground. The control unit determines that the target switch has a short-circuit failure when a voltage of the power supply line in which the target switch is not provided is smaller than a predetermined voltage.

公开(公告)号：US20190135330A1

公开(公告)日：2019-05-09

申请号：US16242314

申请日：2019-01-08

Applicant: DENSO CORPORATION

Inventor： Takashi SUZUKI

IPC: B62D5/04 ,  H02M7/5387

CPC classification number: B62D5/04 ,  B62D5/046 ,  H02M1/32 ,  H02M7/53875 ,  H02M2001/0009

Abstract: A power converter for a three-phase electric rotary machine including first and second winding sets includes: first and second inverters corresponding to the first and second winding sets, respectively; and a control unit including a command calculation unit that calculates first and second voltage command values related to voltages to be applied to the first and second winding sets, and an excess correction unit that corrects first and second voltage command corresponding values corresponding to the first and second voltage command values. When one of the first and second voltage command corresponding values exceeds a limitation value which is set in accordance with a voltage capable of being outputted, the excess correction unit performs an excess correction process for correcting the other of the first and second voltage command corresponding values in accordance with an excess amount over the limitation value.

公开(公告)号：US20190047613A1

公开(公告)日：2019-02-14

申请号：US16077887

申请日：2017-01-13

Applicant: DENSO CORPORATION

Inventor： Ryo KANO ,  Takashi SUZUKI

IPC: B62D5/04 ,  B62D6/00 ,  H02P25/22 ,  H02P25/03 ,  H02P27/06 ,  H02P29/032 ,  B60R16/023

CPC classification number: B62D5/0463 ,  B60R16/0232 ,  B62D5/046 ,  B62D6/00 ,  H02P25/03 ,  H02P25/22 ,  H02P27/06 ,  H02P29/032 ,  H02P29/50

Abstract: A control apparatus (10) for controlling a three-phase rotary machine (80) having two three-phase winding sets (801, 802) includes: two power converters (601, 602) outputting AC currents, having a same amplitude and a phase difference of (30±60×n) [deg], to the two winding sets; a harmonic component generator (20) superimposing a harmonic component on a phase current first harmonic component of a current command value; and two controllers (331, 332) calculating voltage command values for the two power converters according to the current command value. A combination of amplitudes of the phase current fifth and seventh harmonic components to reduce a peak of the phase current first harmonic component is defined as a fundamental amplitude. The harmonic component generator performs a harmonic amplitude reduction process to reduce a phase current peak reduction amount of the phase current first harmonic component from the fundamental amplitude according to a predetermined parameter, and to reduce an absolute value of an amplitude of the harmonic component.