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公开(公告)号：US20160118923A1
公开(公告)日：2016-04-28
申请号：US14867438
申请日：2015-09-28
Applicant: DENSO CORPORATION
Inventor： Ryo Kano , Takashi Suzuki , Hideki Kabune
CPC classification number: H02P25/22 , B62D5/0403 , B62D5/046 , B62D5/0496 , H02K3/28 , H02P29/66
Abstract: A brushless motor for an electric power steering device that assists a steering operation includes: a stator having a plurality of winding sets for a plurality of systems respectively; and a rotator having a ferrite magnet. In the motor, a maximum current flowing without any demagnetization at high temperature is large. Hence, the torque of the motor is easily ensured at high temperature. In particular, when a failure occurs in one system, it is easy to ensure the torque of the normal system even at high temperature.
Abstract translation: 一种用于辅助转向操作的电动助力转向装置的无刷电动机，包括：分别具有用于多个系统的多个绕组的定子; 和具有铁氧体磁体的转子。 在电动机中，在高温下没有任何退磁流动的最大电流大。 因此，在高温下容易确保电动机的转矩。 特别地，当在一个系统中发生故障时，即使在高温下也容易确保正常系统的扭矩。
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公开(公告)号：US09214886B2
公开(公告)日：2015-12-15
申请号：US13945311
申请日：2013-07-18
Applicant: DENSO CORPORATION
Inventor： Takashi Suzuki
CPC classification number: H02P25/02 , H02P21/0085 , H02P21/04 , H02P21/12 , H02P21/22 , H02P25/026 , H02P25/03
Abstract: An ECU having two inverters outputs AC currents, which have the same amplitude and a phase difference of 30°. When motor magnetic fluxes include distortion component of fifth harmonic, a torque ripple of sixth harmonic is generated in a torque of each drive system. The torque ripples of sixth harmonic are cancelled out in a sum of torques of the two drive systems. A fifth harmonic current having a frequency of fivefold are superimposed on base components of currents so that peak values of the base wave currents are reduced. As a result, heat generation arising from current peak values can be reduced.
Abstract translation: 具有两个逆变器的ECU输出具有相同振幅和相位差为30°的AC电流。 当电动机磁通量包括五次谐波的失真分量时，在每个驱动系统的转矩中产生六次谐波的转矩波动。 六次谐波的扭矩波动以两个驱动系统的转矩之和抵消。 具有五倍频率的五次谐波电流叠加在电流的基极分量上，使得基波电流的峰值减小。 结果，可以降低由当前峰值产生的热产生。
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公开(公告)号：US09124211B2
公开(公告)日：2015-09-01
申请号：US14149943
申请日：2014-01-08
Applicant: DENSO CORPORATION
Inventor： Takashi Suzuki
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。
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公开(公告)号：US09024553B2
公开(公告)日：2015-05-05
申请号：US13867687
申请日：2013-04-22
Applicant: Denso Corporation
Inventor： Takashi Suzuki , Takeshi Itoh , Hirofumi Kako
CPC classification number: H02P21/14
Abstract: A control apparatus of an AC motor improves an electric current estimation accuracy of the AC motor, which includes a three phase motor with an electric current detector to detect an electric current detection value of one of the three phases (a sensor phase). The control apparatus includes an electric current estimation unit that repeatedly performs an inverted dq conversion and a dq conversion. The inverted dq conversion calculates an electric current estimate values for phases other than the sensor phase based on the d/q axis electric current estimate values of a previous cycle. The dq conversion calculates the d/q axis electric current estimate values of a current cycle in a rotation coordinate system of the AC motor based on the electric current estimate values calculated by the inverted dq conversion and the electric current detection value of the sensor phase detected by the electric current detector.
Abstract translation: AC电动机的控制装置提高了包括具有电流检测器的三相电动机的交流电动机的电流推定精度，以检测三相（传感器相位）之一的电流检测值。 控制装置包括重复执行反向dq转换和dq转换的电流估计单元。 反向dq转换基于前一周期的d / q轴电流估计值来计算除传感器相之外的相的电流估计值。 dq转换基于由反向dq转换计算的电流估计值和检测到的传感器相位的电流检测值，计算交流电动机的旋转坐标系中的当前周期的d / q轴电流估计值 通过电流检测器。
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公开(公告)号：US08816612B2
公开(公告)日：2014-08-26
申请号：US13856583
申请日：2013-04-04
Applicant: Denso Corporation
Inventor： Takashi Suzuki
CPC classification number: H02P27/08 , H02M7/5395 , H02M2001/0009 , H02M2007/53876
Abstract: A controller includes: an inverter having switching devices for converting by a PWM method and supplying an electric power to a multi-phase rotary device; a duty calculator calculating a duty command value with To; a pseudo duty calculator calculating a N-th update duty value based on N-th and (N−1)-th duty command values according to a ratio of To/Tr with a linear compensation method; a comparator comparing the update duty value with a carrier wave to generate an on-off signal of each switching device; and a detector detecting current of each phase with To. The duty calculator changes an average voltage of each phase to make an on-state time of a detection side switching device equal to or longer than minimum. When the on-state time at one phase is smaller than minimum, the pseudo duty calculator outputs a pseudo duty value to detect the current of other phases.
Abstract translation: 控制器包括：逆变器，具有用于通过PWM方式转换并将电力提供给多相旋转装置的开关装置; 负责计算器用To计算占空指令值; 伪占空比计算器，根据第N和第（N-1）占空指令值，根据To / Tr与线性补偿方法的比率，计算第N次更新占空比值; 比较所述更新占空比值与载波以产生每个开关器件的导通截止信号的比较器; 以及用To检测每相的电流的检测器。 占空比计算器改变每相的平均电压，使检测侧切换装置的导通状态时间等于或长于最小值。 当一阶段的导通状态时间小于最小值时，伪占空比计算器输出伪占空比值以检测其它相的电流。
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Patent Agency Ranking
公开(公告)号：US11827296B2
公开(公告)日：2023-11-28
申请号：US16922880
申请日：2020-07-07
Applicant: DENSO CORPORATION
Inventor： Takashi Suzuki
CPC classification number: B62D6/002 , B62D5/006 , B62D5/0409 , B62D5/0421 , B62D5/0463 , B62D6/008
Abstract: A steering control device in a seer-by-wire system calculates a current limit presentation command value so as to convey an output-limited state of a turning device to a driver, calculates a steering torque command value on a basis of a physical quantity corresponding to an output torque of the turning device, and calculates a basic reaction force torque command value being a basic value of a reaction force torque command value so that a detection value of a torque sensor follows a target value that is based on the steering torque command value. The control device controls a current flowing to a reaction-force-use rotary electric machine on a basis of the basic reaction force torque command value and the end presentation command value, and increases an absolute value of the current limit presentation command value when the turning device is in the output-limited state.
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公开(公告)号：US11750120B2
公开(公告)日：2023-09-05
申请号：US17660914
申请日：2022-04-27
Applicant: DENSO CORPORATION
Inventor： Takashi Suzuki
CPC classification number: H02P5/60 , B62D5/0463 , H02M7/537 , H02P27/06 , B62D1/187
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.
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公开(公告)号：US11136064B2
公开(公告)日：2021-10-05
申请号：US16597176
申请日：2019-10-09
Applicant: DENSO CORPORATION
Inventor： Nobuyori Nakajima , Haruo Suzuki , Takashi Suzuki , Go Endoh , Koichi Nakamura , Yosuke Ogi , Atsuko Oka , Shuji Kuramitsu
Abstract: A rotation detection device includes a plurality of detectors each including a plurality of calculators respectively calculating a detection value. A control unit of the rotation detection device monitors abnormality of detection values respectively detected by the plurality of detectors, and, when determining abnormality, identifies a calculator calculating an abnormal detection value based on a result of comparison between the detection values of the plurality of calculators. Then, the control unit continues calculation of an absolute angle by using the detection values from the calculators other than the identified calculator.
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公开(公告)号：US11124230B2
公开(公告)日：2021-09-21
申请号：US16560074
申请日：2019-09-04
Applicant: DENSO CORPORATION
Inventor： Takashi Suzuki
Abstract: A steering controller sets a steer angle ratio to a high value in a high angle ratio mode that is high relative to a reference value in a normal mode. A control section controls operation of a reaction force motor and a tire turning motor based on a steer angle ratio mode input to a switch. The control section controls an output of the reaction force motor provided for a driver based on (i) a “reaction force amount” based on road surface information calculated from output of the tire turning motor and (ii) a “viscosity compensation amount” negatively correlated with a steering speed of a steering device.
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公开(公告)号：US11081981B2
公开(公告)日：2021-08-03
申请号：US16688103
申请日：2019-11-19
Applicant: DENSO CORPORATION
Inventor： Takashi Suzuki
Abstract: An electronic control unit, for example, a rotating machine controller, is capable of driving one three-phase motor including a first set of three-phase winding and a second set of three-phase winding and one to three direct current motors. The direct current motor is connected to a position between one phase of the first set of three-phase winding and one phase of the second set of three-phase winding without redundancy. Inverters convert a direct current electric power to a three-phase alternating current electric power by an operation of bridge-connected plural switching elements, and apply a voltage to each phase in two sets of three-phase winding. A control unit controls a supply of electric power to the three-phase motor and to the direct current motor by controlling an operation of the switching elements.
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