公开(公告)号：US09819293B2

公开(公告)日：2017-11-14

申请号：US15348296

申请日：2016-11-10

Applicant: DENSO CORPORATION

Inventor： Ryuji Omata ,  Yuri Murata

IPC: H02P21/00 ,  H02P27/08 ,  H02P29/024 ,  G01R31/00 ,  G01R31/28

CPC classification number: H02P21/50 ,  G01R31/007 ,  G01R31/2829 ,  H02P21/18 ,  H02P27/08 ,  H02P29/024

Abstract: A voltage sensor abnormality diagnosis apparatus is applied to a motor controller operating switching of inverter by a switching signal for complementary on and off and diagnoses abnormality of input voltage sensor. An input voltage estimated value calculation section calculates input voltage estimated value by multiplying voltage command amplitude deviation by conversion coefficient, the voltage command amplitude deviation being obtained by subtracting theoretical voltage command amplitude, which is amplitude of theoretical voltage command calculated by using a motor model expression, from a control voltage command amplitude, which is an amplitude of a control voltage command calculated by feedback control and has been corrected by the dead time correction amount. An abnormality determination section determines that the input voltage sensor is abnormal if an absolute value of a difference between an input voltage sensor value and the input voltage estimated value is larger than a voltage threshold value.

公开(公告)号：US09209723B2

公开(公告)日：2015-12-08

申请号：US14458516

申请日：2014-08-13

Applicant: DENSO CORPORATION

Inventor： Ryuji Omata ,  Takahumi Oowada

IPC: H03K5/00 ,  H02P6/00 ,  H02P21/14

CPC classification number: H02P6/002 ,  H02P6/28 ,  H02P21/20

Abstract: A control device of a three-phase AC motor includes: an inverter; a current sensor for a sensor phase current; and a controller switching a switching element of each phase of the inverter and having a current estimation device, which calculates a sensor-phase-standard current phase according to α and β axis currents and a current estimated value of another phase. The current estimation device calculates the α axis current at every switching and intermediate timings, calculates a first differential value of the α axis current at every switch timing, calculates the β axis current according to the first differential value, calculates a second differential value of the α axis current at every intermediate timing, and calculates the β axis current according to the second differential value. The intermediate timing is set to have an unequal interval between two adjacent switch timings.

Abstract translation: 三相交流电动机的控制装置包括：逆变器; 用于传感器相电流的电流传感器; 以及控制器切换逆变器的各相的开关元件，并具有根据α和＆amp; bgr计算传感器相位标准电流相位的电流估计装置; 轴电流和另一相的电流估计值。 当前估计装置在每个切换和中间定时计算α轴电流，计算每个切换定时的α轴电流的第一差分值，计算＆bgr; 根据第一差分值计算α轴电流，计算出每个中间时刻的α轴电流的第二微分值， 轴电流根据第二差分值。 中间定时被设置为在两个相邻的开关定时之间具有不等间隔。

公开(公告)号：US09077273B2

公开(公告)日：2015-07-07

申请号：US14174159

申请日：2014-02-06

Applicant: DENSO CORPORATION

Inventor： Ryuji Omata ,  Takeshi Itoh ,  Hirofumi Kako

IPC: H02P21/00 ,  H02P3/18 ,  H02P21/06 ,  H02P21/14

CPC classification number: H02P21/0035 ,  H02P3/18 ,  H02P21/06 ,  H02P21/22 ,  H02P21/34

Abstract: A control device of a three phase AC motor includes: an inverter for driving the motor; a current sensor for sensing current flowing in a sensor phase of the motor; and a controller for switching multiple switching elements in the inverter to control the current of the motor. An electric angle is defined as θe based on one phase. A phase is defined as φ based on a dq axis. A phase angle of a current command vector is defined as (θe+φ+C). When the motor is stopped, the controller determines whether the current command vector is orthogonal to an axis of the sensor phase. When the current command vector is orthogonal to the axis of the sensor phase, the controller operates the phase or the electric angle to set the current command vector not to be orthogonal to the axis of the sensor phase.

Abstract translation: 三相交流电动机的控制装置包括：用于驱动电动机的逆变器; 用于感测在电动机的传感器相中流动的电流的电流传感器; 以及用于切换逆变器中的多个开关元件以控制电动机的电流的控制器。 电角度被定义为：基于一个相位。 一个阶段定义为＆phgr; 基于dq轴。 电流指令矢量的相位角定义为（＆Thetas; e +＆phgr; + C）。 当电机停止时，控制器确定当前命令矢量是否与传感器相位的轴正交。 当电流指令矢量与传感器相位轴正交时，控制器运行相位或电角度，使电流指令矢量不与传感器相位轴正交。

公开(公告)号：US11218106B2

公开(公告)日：2022-01-04

申请号：US16360593

申请日：2019-03-21

Applicant: DENSO CORPORATION ,  TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Haruka Oka ,  Ryuji Omata ,  Kiyotaka Matsubara ,  Makoto Nakamura ,  Daigo Nobe

IPC: H02P25/22 ,  H02P27/06 ,  H02M7/5387 ,  H02P21/20 ,  H02P25/024

Abstract: An electric motor driving system controls driving of an electric motor having windings of two or more phases each having open ends by using a pair of inverters. A control unit includes a first inverter control circuit that generates a first voltage instruction output to the first inverter based on a torque instruction and a second inverter control circuit that generates a second voltage instruction output to the second inverter based on the torque instruction. At least one of the inverter control circuits includes an electric power controller that controls allocation of electrical power supplied from a pair of power supplies to the pair of inverters, respectively, by either advancing or delaying an angle of a phase of each of vectors of voltage instructions in accordance with the target electric power instruction during execution of torque feedback control.

公开(公告)号：US20190296665A1

公开(公告)日：2019-09-26

申请号：US16360559

申请日：2019-03-21

Applicant: Toyota Jidosha Kabushiki Kaisha ,  Denso Corporation

Inventor： Kiyotaka Matsubara ,  Makoto Nakamura ,  Daigo Nobe ,  Ryuji Omata

IPC: H02P6/08 ,  H02P27/06 ,  H02M7/44 ,  B60L15/02 ,  H02P21/22 ,  H02P6/12 ,  H02P11/06

Abstract: A motor system provided with one motor and two inverters includes a first inverter control unit which changes a frequency of a first carrier wave (first carrier frequency) used for producing a switching signal fora first inverter according to an operating point of the motor; and a second inverter control unit which changes a frequency of a second carrier wave (second carrier frequency) used for producing a switching signal for a second inverter according to an operating point of the motor. The first carrier frequency has a changing characteristic depending on the first inverter control unit and the second carrier frequency has a changing characteristic depending on the second inverter control unit, and the changing characteristics are different from each other to make the first carrier frequency and the second carrier frequency differ from each other at an identical operating point.

公开(公告)号：US20190296664A1

公开(公告)日：2019-09-26

申请号：US16360472

申请日：2019-03-21

Applicant: Toyota Jidosha Kabushiki Kaisha ,  Denso Corporation

Inventor： Kiyotaka Matsubara ,  Makoto Nakamura ,  Daigo Nobe ,  Ryuji Omata

IPC: H02P6/08 ,  H02M7/42 ,  H02P27/06 ,  B60L15/02 ,  H02P21/22 ,  H02P6/12 ,  H02P11/00

Abstract: A control unit calculates a motor voltage vector including a corresponding excitation voltage command and a torque voltage command in response to an output request for the motor and changes a first inverter voltage vector and a second inverter voltage vector while maintaining the motor voltage vector obtained to allow distribution of the motor voltage vector at any ratio. The first inverter voltage vector includes a first excitation voltage command and a first torque voltage command associated with an output from the first inverter, and the second inverter voltage vector includes a second excitation voltage command and a second torque voltage command associated with an output from the second inverter.

公开(公告)号：US20190296568A1

公开(公告)日：2019-09-26

申请号：US16360552

申请日：2019-03-21

Applicant: Toyota Jidosha Kabushiki Kaisha ,  Denso Corporation

Inventor： Kiyotaka Matsubara ,  Makoto Nakamura ,  Daigo Nobe ,  Ryuji Omata

IPC: H02J7/00 ,  H02P27/08 ,  H02P21/00

Abstract: A motor system provided with one motor, two batteries, and two inverters further includes a charger which is connected to a first battery and supplies external power; and a control unit which controls drive of the first inverter and the second inverter to drive the motor. When the second battery is charged with the external power, the control unit drives the first inverter and the second inverter to allow power from the first inverter to be transmitted to the second battery through the motor and the second inverter while the motor is in a stationary state.

公开(公告)号：US09590551B2

公开(公告)日：2017-03-07

申请号：US14174102

申请日：2014-02-06

Applicant: DENSO CORPORATION

Inventor： Ryuji Omata ,  Takeshi Itoh ,  Hirofumi Kako

IPC: H02P21/00 ,  H02P3/18

CPC classification number: H02P21/26 ,  H02P3/18 ,  H02P21/22

Abstract: A control apparatus includes an inverter for driving a three-phase AC motor when connected to a DC power source, a smoothing capacitor interposed between the DC power source and an input side of the inverter and connected in parallel to the DC power source, a current sensor for detecting a current of one phase of the motor, and a controller for controlling the motor through the inverter. The controller performs a discharge process to discharge the capacitor, when the DC power source is disconnected from the capacitor. The controller calculates a d-axis voltage command reference value based on d-axis and q-axis current command values. The controller sets a q-axis voltage command reference value to zero. The controller generates d-axis and q-axis voltage command values by correcting at least the d-axis voltage command reference value and outputs the d-axis and q-axis voltage command values to the inverter.

Abstract translation: 控制装置包括：逆变器，用于在连接到直流电源时驱动三相交流电动机;平滑电容器，其插入在所述直流电源和所述逆变器的输入侧之间并联连接到所述直流电源;电流 用于检测电动机的一相电流的传感器，以及通过逆变器控制电动机的控制器。 当DC电源与电容器断开时，控制器进行放电处理以对电容器放电。 控制器基于d轴和q轴电流指令值计算d轴电压指令参考值。 控制器将q轴电压指令参考值设置为零。 控制器通过至少校正d轴电压指令基准值来生成d轴和q轴电压指令值，并将d轴和q轴电压指令值输出到逆变器。

公开(公告)号：US09160267B2

公开(公告)日：2015-10-13

申请号：US13774619

申请日：2013-02-22

Applicant: DENSO CORPORATION

Inventor： Ryuji Omata ,  Takeshi Itoh ,  Hirofumi Kako

IPC: H02P21/00 ,  H02P25/28 ,  H02P21/14

CPC classification number: H02P21/14 ,  H02P21/22

Abstract: A reference current phase sensing part of a sensor phase (W) calculates an α-axis current iα and a β-axis current iβ in a fixed coordinate system formed with respect to a sensor phase as a base. The α-axis current iα is calculated based on a sensed current iw.sns of the sensor phase and a β-axis current iβ is calculated based on command currents iu* and iv* of the other two phases (U, V) determined from a d-axis command current id* and a q-axis command current iq*. Then a current phase xθ=tan−1(iβ/iα) is calculated. A basic wave estimating part calculates an estimated current iu.est of the other phase by calculating an estimation coefficient corresponding to the reference current phase xθ of the sensor phase and multiplying the sensed current iw.sns of the sensor phase by the estimation coefficient.

Abstract translation: 传感器相位（W）的参考电流相位感测部分计算α轴电流iα和a＆bgr; -ax电流i＆bgr; 在以传感器相为基底形成的固定坐标系中。 基于传感器相位的感测电流iw.sns和电流i＆bgr计算α轴电流iα。 基于从d轴指令电流id *和q轴指令电流iq *确定的其他两相（U，V）的指令电流iu *和iv *计算出。 然后计算当前阶段x＆thetas; = tan-1（i＆bgr; /iα）。 基本波估计部分通过计算与参考电流相位x＆amp;对应的估计系数来计算另一相的估计电流iu.est; 传感器相位的感测电流iw.sns乘以估计系数。

公开(公告)号：US08917040B2

公开(公告)日：2014-12-23

申请号：US13774295

申请日：2013-02-22

Applicant: Denso Corporation

Inventor： Ryuji Omata ,  Takeshi Itoh ,  Hirofumi Kako

IPC: G05B5/00 ,  H02P21/00 ,  H02P21/14

CPC classification number: H02P21/14 ,  H02P21/22

Abstract: A motor control circuit calculates an α-axis current iα and a β-axis current iβ in a fixed coordinate system based on a W-phase (sensor phase) of an AC motor. The control circuit calculates, at each switching time point and each intermediate time point, the α-axis current iα from a current iw.sns sensed in the W-phase, and the β-axis current iβ from a differentiated value Δiα determined from the variation quantity of the α-axis current between every two successive switching time points or intermediate time points. Subsequently, the control circuit calculates a current phase xθ=tan−1(iβ/iα) relative to the W-phase. Subsequently, the control circuit calculates an estimation factor according to the current phase xθ and determines an estimated current iu.est in the U-phase of the AC motor by multiplying the sensed current iw.sns by the calculated estimation factor.

Abstract translation: 电机控制电路计算α轴电流iα和a＆bgr; -ax电流i＆bgr; 在基于交流电动机的W相（传感器相位）的固定坐标系中。 控制电路在每个切换时间点和每个中间时间点计算从W相中感测的电流iw.sns的α轴电流iα和电流i＆bgr; 根据每两个连续切换时间点或中间时间点之间的α轴电流的变化量确定的差分值＆Dgr;iα。 随后，控制电路计算相对于W相的电流相位x＆amp; t = tan-1（i＆bgr; /iα）。 随后，控制电路根据当前相位x＆amp; t计算估计因子; 并且通过将所感测的电流iw.sns乘以所计算的估计因子来确定AC电动机的U相中的估计电流iu.est。