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公开(公告)号：US20200091850A1
公开(公告)日：2020-03-19
申请号：US16571446
申请日：2019-09-16
Applicant: DENSO CORPORATION
Inventor： Go ENDOH , Masaya TAKI , Hiroyasu OTAKE
Abstract: In a motor driving device, a current detector detects a value of the motor current, and a limit variable calculator calculates a calculation value of a limit variable for limiting the command current. A determiner determines, based on a relationship between the value of the motor current and the calculation value of the limit variable, whether the motor current is in a less-response situation to change of the command current. A current limiter determines whether to limit a value of the command current based on the calculation value of the limit variable in accordance with a result of the determination of whether the motor current is in the less-response situation to change of the command current.
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公开(公告)号：US20190210637A1
公开(公告)日：2019-07-11
申请号：US16243488
申请日：2019-01-09
Applicant: DENSO CORPORATION
Inventor： Hiroyasu OTAKE , Toshihiro FUJITA , Takashi SUZUKI
CPC classification number: B62D5/049 , B62D15/0235
Abstract: A microcomputer includes an abnormality monitor unit, a rotation angle calculation unit and a current supply control unit. The abnormality monitor unit monitors an abnormality of the rotation angle sensor. The rotation angle calculation unit calculates an electrical angle based on angle information acquired from the rotation angle sensor and an abnormality state of the rotation angle sensor. The current supply control unit controls current supply to the winding sets based on the electrical angle. When an abnormality is detected in one of the sensor units, the rotation angle calculation unit calculates the electrical angle based on a hold value which is the electrical angle before the detection of abnormality during a period from the detection of abnormality to a final determination of the abnormality. When the abnormality of the sensor unit is finalized, the electrical angle is calculated based on the angle information of the other sensor unit which is normal.
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公开(公告)号：US20200180684A1
公开(公告)日：2020-06-11
申请号：US16701592
申请日：2019-12-03
Applicant: DENSO CORPORATION , Nagoya Institute of Technology
Inventor： Shuji KURAMITSU , Hiroyasu OTAKE , Ryo KANO , Yoshifumi MORITA , Hironao WATANABE , Takayuki KATO
Abstract: A calculator or an electronic control unit (ECU) calculates an instruction value of a column assist torque and a rack assist torque output from a column actuator, or a column motor, and a rack actuator, or a rack motor, based at least on a torsion torque. The calculator includes a base assist controller, a stabilization controller, and an adder. The base assist controller individually or commonly calculates a base assist torque based on the torsion torque. The stabilization controller individually or commonly calculates a stabilization torque for stabilizing a steering system. The adder performs addition of the base assist torque and the stabilization torque.
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公开(公告)号：US20140019505A1
公开(公告)日：2014-01-16
申请号：US13939760
申请日：2013-07-11
Inventor： Yasuhiko MUKAI , Yoshifumi MORITA , Hiroyuki UKAI , Makoto IWASAKI , Hiroyasu OTAKE , Ryo KANO
IPC: G06F17/10
Abstract: An apparatus for estimating a transfer function of at target object having divided systems is disclosed. The apparatus acquires an estimation equation to estimate the transfer function of the target object, and determines, for each arithmetic operation in the estimation equation, whether the arithmetic operation is an addition or a multiplication. For the multiplication, the apparatus performs the multiplication of frequency response characteristics in the frequency domain. For addition, the apparatus converts the frequency response characteristics into time response characteristics, performs the addition of the time response characteristics in the time domain, and reconverts a result of the addition into the frequency domain.
Abstract translation: 公开了一种用于估计具有分割系统的目标对象的传递函数的装置。 该装置获取估计目标对象的传递函数的估计方程，并且对于估计方程中的每个算术运算，确定算术运算是加法还是乘法。 对于乘法，装置执行频域中的频率响应特性的乘法。 此外，该装置将频率响应特性转换为时间响应特性，在时域中执行时间响应特性的添加，并将加法的结果重新转换到频域。
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公开(公告)号：US20200313590A1
公开(公告)日：2020-10-01
申请号：US16817964
申请日：2020-03-13
Applicant: DENSO CORPORATION
Inventor： Hiroyasu OTAKE , Nobuyori NAKAJIMA , Go ENDOH
IPC: H02P21/22 , H02P25/22 , H02P27/08 , H02M7/5387 , B62D5/04
Abstract: A motor control device includes a plurality of systems capable of controlling current supply to a motor. Each microcomputer of first and second systems is configured to communicate information of the own system and the other system by inter-computer communication and has an independent ground potential. A power supply current flowing between a power supply and a power converter is assumed to be positive and negative in a power running state and a regeneration state. Each microcomputer monitors the power supply current of each system by the inter-computer communication, and executes a power supply current balancing process of limiting a current command value or a voltage command value of at least one of the two systems thereby to decrease a power supply current difference between the two systems when the power supply current difference between the two systems exceeds a target value.
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Patent Agency Ranking
公开(公告)号：US20200083833A1
公开(公告)日：2020-03-12
申请号：US16560036
申请日：2019-09-04
Applicant: DENSO CORPORATION
Inventor： Takashi SUZUKI , Hiroyasu OTAKE
Abstract: A control device is provided for a three-phase rotary machine including two three-phase-winding sets. The control device includes two power converters for outputting alternating currents with a same amplitude and a phase difference of (30±60×n) degrees to the two three-phase-winding sets and a control unit for controlling energization of the three-phase rotary machine by calculating a d-axis current and a q-axis current of a 6(2k+1)th component to be superimposed on a fundamental wave component on dq coordinates so as to reduce a phase current peak value. The control unit calculates currents so that a high-order dq amplitude ratio is 0 when a fundamental wave current amplitude is a first threshold or less, and the high-order dq amplitude ratio is 1 when the fundamental wave current amplitude is larger than a second threshold.
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公开(公告)号：US20190149083A1
公开(公告)日：2019-05-16
申请号：US16183135
申请日：2018-11-07
Applicant: DENSO CORPORATION
Inventor： Haruo SUZUKI , Hiroyasu OTAKE
IPC: H02P29/68
CPC classification number: H02P29/68 , H02M1/32 , H02M7/5387 , H02M2001/327
Abstract: A motor control device of an electric motor includes: a board with a heat sink; multiple switching elements; a drive circuit IC; a control circuit IC; first and second temperature sensors; a temperature information processing unit; and an abnormality determination unit. An out-of-normal-range state is a state where a temperature deviation exceeds a normal deviation threshold, and it is impossible to determine which one of the first and second temperature sensors is abnormal. When both sensors are normal, the temperature information processing unit uses one of first and second detected temperatures. When one sensor is abnormal and the other is normal, the temperature information processing unit uses one of the first and second detected temperatures of a normal sensor. When both sensors fall in the out-of-normal-range state, the temperature information processing unit uses one of the first and second detected temperatures which meets a predetermined condition.
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公开(公告)号：US20230219618A1
公开(公告)日：2023-07-13
申请号：US18067487
申请日：2022-12-16
Applicant: Toyota Jidosha Kabushiki Kaisha , JTEKT CORPORATION , DENSO CORPORATION
Inventor： Takahito ISHINO , Masaharu YAMASHITA , Kenji SHIBATA , Yosuke YAMASHITA , Shintaro TAKAYAMA , Kazuaki IIDA , Ryo YAMAZAKI , Yuuta KAJISAWA , Kenichi ABE , Toyohiro HAYASHI , Nobuyori NAKAJIMA , Hiroyasu OTAKE , Kurumi TAZUKE , Hiroki TOMIZAWA
CPC classification number: B62D5/0496 , B62D5/046 , H02P29/68 , H02P23/14
Abstract: A steer-by-wire steering system including a steering device including a steering motor and a controller configured to supply a steering current to the steering motor based on a steering request. The controller includes a plurality of microcomputers, a plurality of drive circuits, and a plurality of temperature sensors. When a detection temperature difference that is a difference between detection temperatures of any two of the plurality of temperature sensors is greater than a predetermined threshold, each of the plurality of microcomputers executes an independent calculation control to independently calculate and set a current limit value, which is an upper limit value of the steering current, based on a detection temperature of one of the plurality of temperature sensors corresponding to itself, irrespective of detection temperatures of one or more of the plurality of temperature sensors other than the one of the plurality of temperature sensors corresponding to itself.
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公开(公告)号：US20200207406A1
公开(公告)日：2020-07-02
申请号：US16711857
申请日：2019-12-12
Applicant: DENSO CORPORATION
Inventor： Go ENDOH , Nobuyori NAKAJIMA , Koichi NAKAMURA , Hiroyasu OTAKE
Abstract: Each of a plurality of microcomputers outputs a motor drive signal, which is generated based on a current command value and a current limit value as a control amount command value and a control amount limit value, to each motor drive circuit. When an OFF determination of an own microcomputer is made, each microcomputer executes first end processing as a first stage of end processing and transmits an OFF determination signal to the other microcomputer. When the OFF determination signal is received from the other microcomputer, each microcomputer determines that the OFF determination has been made and starts second end processing which gradually decreases the current command value or the current control limit value from a present value. When the second end processing is completed and power-off preparation of the own microcomputer and the other microcomputer is completed, each microcomputer executes final end processing for turning off the power supply relay.
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公开(公告)号：US20200180683A1
公开(公告)日：2020-06-11
申请号：US16701567
申请日：2019-12-03
Applicant: DENSO CORPORATION , Nagoya Institute of Technology
Inventor： Shuji KURAMITSU , Hiroyasu OTAKE , Ryo KANO , Yoshifumi MORITA , Hironao WATANABE , Takayuki KATO
IPC: B62D5/04
Abstract: An electric power steering device including a column actuator disposed on a column side of the intermediate shaft and outputting a column assist torque; a rack actuator disposed on a rack side of the intermediate shaft and outputting a rack assist torque; a column torque sensor coaxially disposed with the steering shaft and detecting a column torsion torque; a rack torque sensor coaxially disposed with the intermediate shaft and detecting a rack torsion torque; and a calculator calculating instruction values of the column assist torque and the rack assist torque based on the torsion torques.
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