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公开(公告)号：US20190144030A1
公开(公告)日：2019-05-16
申请号：US16243519
申请日：2019-01-09
Applicant: DENSO CORPORATION
Inventor： Toshimitsu SAKAI , Masaya TAKI , Shuji KURAMITSU , Koichi NAKAMURA
Abstract: A motor control apparatus include: multiple motor drive circuits that drives at least one motor; multiple microcomputers that include a drive signal generator, and a drive timing generator; and multiple clock generation circuits. The microcomputers include a synchronization signal transmitter microcomputer as at least one microcomputer that transmits a synchronization signal synchronized with the drive timing of an own microcomputer and synchronizing the drive timing of the microcomputers. The microcomputers include a synchronization signal receiver microcomputer as at least one microcomputer that receives the synchronization signal transmitted from the synchronization signal transmitter microcomputer.
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公开(公告)号：US20190039643A1
公开(公告)日：2019-02-07
申请号：US16083665
申请日：2017-02-01
Applicant: DENSO CORPORATION
Inventor： Atsuko OKA , Shuji KURAMITSU , Koichi NAKAMURA
Abstract: A sensor device includes: multiple sensor units, each of which includes multiple sensor elements and a signal processing unit that generates and transmits an output signal including multiple detection signals corresponding to detection values of the sensor elements; and multiple control units, each of which includes a communication unit that receives the output signal, an abnormality monitoring unit that monitors abnormality of the respective sensor unit, and a physical quantity computation unit that computes a physical quantity based on at least one of the detection signals which is normal. One control unit mutually transmits and receives the detection signals as subject sensor signals received from the respective sensor unit and the detection signals as other sensor signals received from another one of the control units with another system control unit.
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公开(公告)号：US20200207408A1
公开(公告)日：2020-07-02
申请号：US16711794
申请日：2019-12-12
Applicant: DENSO CORPORATION
Inventor： Koichi NAKAMURA , Nobuyori NAKAJIMA , Go ENDOH , Yosuke OGI , Atsuko OKA , Shuji KURAMITSU , Takashi SUZUKI , Haruo SUZUKI
Abstract: A motor controller for controlling a motor includes first and second angle sensors detecting motor rotation, and first and second detection circuits detecting rotation number information based on sensor output from the angle sensors. Further, the motor controller includes a steer angle information obtainer obtaining steer angle information involving steering of a vehicle from an external sensor, which is different from the angle sensors, and an abnormality determiner determining abnormality of information that has a matching degree of lower than a preset value when post-conversion information, or value measured by the same characteristics. This information is compared with each other after conversion from the rotation number information and from the steer angle information, and is used by a control amount calculator to calculate a control amount of the motor based on the information determined as having no abnormality by the abnormality determiner.
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公开(公告)号：US20200047805A1
公开(公告)日：2020-02-13
申请号：US16654307
申请日：2019-10-16
Applicant: DENSO CORPORATION
Inventor： Atsuko OKA , Shuji KURAMITSU , Koichi NAKAMURA , Yuki WATANABE , Toshihiro FUJITA , Takaharu KOZAWA , Shuhei MIYACHI , Katsuhiko HAYASHI , Masaya TAKI , Toshimitsu SAKAI
IPC: B62D15/02 , B62D5/04 , B60R16/027
Abstract: A steering angle detection device includes plural control units and plural steering angle sensors. Each control unit is configured to transmit steering angle information related to a steering angle of a vehicle to an external device and transmit and receive information mutually therebetween. Each steering angle sensor is provided in correspondence to each control unit and configured to output a sensor signal corresponding to a detection value of a change in the steering angle to the corresponding control unit. One of the control units transmits, as a transmission control unit, the steering angle information to the external device at one transmission timing.
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公开(公告)号：US20190241214A1
公开(公告)日：2019-08-08
申请号：US16264282
申请日：2019-01-31
Applicant: DENSO CORPORATION
Inventor： Atsuko OKA , Nobuyori NAKAJIMA , Go ENDOH , Koichi NAKAMURA , Yosuke OGI
CPC classification number: B62D6/10 , B62D5/0463
Abstract: Inverter circuits are provided for motor winding sets, respectively. Control units are provided for the motor winding sets to generate control signals related to driving of the inverter circuits and control currents flowing through the motor winding sets, respectively, thereby controlling driving of a motor. The control mode includes a manual steering mode for controlling the motor according to a steering operation on a steering wheel by a driver and an automatic steering mode for controlling the motor independently of the steering operation on the steering wheel by the driver. The control units are capable of switching the control modes and differentiate the current control according to the control mode. By making the current control different according to the control mode, it is possible to attain optimal characteristics which correspond to each control mode.
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Patent Agency Ranking
公开(公告)号：US20190081585A1
公开(公告)日：2019-03-14
申请号：US16083691
申请日：2017-02-24
Applicant: DENSO CORPORATION
Inventor： Koichi NAKAMURA , Shuji KURAMITSU , Atsuko OKA
CPC classification number: H02P21/34 , B62D5/0403 , B62D5/046 , H02P6/20 , H02P21/22 , H02P25/22 , H02P27/06
Abstract: A control system includes a plurality of control devices each including an initial check unit that performs an initial check before drive control of a rotary electric machine, a transmission/reception unit that transmits/receives an end signal indicating that the initial check is ended, and a drive control unit that performs the drive control of the rotary electric machine after the initial check. The drive control unit starts the drive control of the rotary electric machine when the initial check of the corresponding control device is ended and the end signal is acquired from another control device, and starts the drive control of the rotary electric machine after a lapse of a predetermined time from the start of the initial check of the corresponding control device when the initial check of the corresponding control device is ended and the end signal is not acquired from the another control device.
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公开(公告)号：US20180102719A1
公开(公告)日：2018-04-12
申请号：US15726774
申请日：2017-10-06
Applicant: DENSO CORPORATION
Inventor： Atsuko OKA , Shuji KURAMITSU , Koichi NAKAMURA
CPC classification number: H02P6/12 , H02P6/17 , H02P21/18 , H02P21/22 , H02P23/14 , H02P25/145 , H02P27/08 , H02P27/085 , H02P29/024 , H02P29/68
Abstract: In a current sensor abnormality diagnosis device, an abnormality judgment section determines that the phase current sensors are operating normally when a sum of three phase currents is not more than a threshold value, and a bus current sensor is operating normally based on a comparison result between three phase currents and a bus current. The abnormality judgment section detects which the phase current sensor has failed based on the three phase currents and the bus current when the sum of the three phase currents is more than the threshold value. Because of using the comparison results of the three phase currents with the bus current in addition to the sum of the three phase currents, it is possible for the abnormality judgment section to detect the occurrence of abnormality of each of these current sensors even if the detected current has an undefined value.
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公开(公告)号：US20220297743A1
公开(公告)日：2022-09-22
申请号：US17691310
申请日：2022-03-10
Applicant: JTEKT CORPORATION , DENSO CORPORATION
Inventor： Satoshi SUGIYAMA , Koichi NAKAMURA
Abstract: In a steering control device, a plurality of control systems is configured to switch a drive mode to a cooperative drive mode when command values calculated by control units of the control systems are not different from each other and to switch the drive mode to an independent drive mode when the command values calculated by the control units of the control systems are different from each other. The control systems are configured to gradually limit the command values respectively calculated by the control units of the control systems when a start switch of a vehicle has been turned off. The control systems are configured to switch the drive mode to the independent drive mode regardless of whether the command values calculated by the control units of the control systems are different from each other when the start switch has been turned off while the vehicle is traveling.
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公开(公告)号：US20190248407A1
公开(公告)日：2019-08-15
申请号：US16267743
申请日：2019-02-05
Applicant: DENSO CORPORATION
Inventor： Koichi NAKAMURA , Nobuyori NAKAJIMA , Go ENDOH , Yosuke OGI , Atsuko OKA
IPC: B62D5/04
CPC classification number: B62D5/0463 , B62D5/0481
Abstract: A steering control apparatus controlling an electric power steering apparatus includes a first control part and a second control part. The first control part communicates with an external device and executes a specific process. The second control part communicates with the first control part and executes the specific process. The first control part can acquire first information and second information. When all of the first information and the second information are positive, the first control part transmits positive information to the external device. When a part of the first information and the second information is negative, the first control part transmits negative information to the external device.
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公开(公告)号：US20190144029A1
公开(公告)日：2019-05-16
申请号：US16243503
申请日：2019-01-09
Applicant: DENSO CORPORATION
Inventor： Masaya TAKI , Toshimitsu SAKAI , Koichi NAKAMURA , Shuji KURAMITSU
CPC classification number: B62D5/0463 , B62D5/0403 , B62D5/0412 , B62D5/0457 , B62D5/0481 , B62D6/08 , G06F1/06 , G06F1/12 , G06F1/26 , G06F9/4401 , H02P25/22 , H02P27/06
Abstract: A motor control apparatus includes: multiple motor drive circuits that drive at least one motor; and multiple microcomputers that are operated by a microcomputer power source and include a drive signal generator that generates a motor drive signal. The microcomputers include at least one microcomputer including a stop determiner that determines that operation of an own microcomputer is about to be stopped and transmits information as a stop determination signal. A microcomputer having received the stop determination signal from at least one different microcomputer actually stops operation of an own microcomputer.
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