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公开(公告)号：US10404201B2
公开(公告)日：2019-09-03
申请号：US15910292
申请日：2018-03-02
Applicant: DENSO CORPORATION
Inventor： Ryo Kano , Takashi Suzuki
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.
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公开(公告)号：US11807316B2
公开(公告)日：2023-11-07
申请号：US16559946
申请日：2019-09-04
Applicant: DENSO CORPORATION
Inventor： Ryo Kano , Daisuke Kobayashi , Takashi Suzuki
CPC classification number: B62D5/0484 , B62D1/20 , B62D3/126 , B62D5/0412 , B62D5/0463 , B62D15/0235
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.
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3.发明授权公开(公告)号：US10243489B2
公开(公告)日：2019-03-26
申请号：US15880264
申请日：2018-01-25
Applicant: DENSO CORPORATION
Inventor： Ryo Kano , Takashi Suzuki
IPC: H02P6/10 , B62D5/04 , H02P25/22 , G01R19/00 , H02P21/20 , H02P29/024 , H02P29/032
Abstract: In a rotary electrical machine control apparatus, a selection section selects a relay current limiting value or a coil current limiting value depending on whether a plurality of systems are operated or one or more but not all of the plurality of systems are operated. The system is a combination of a winding set, an inverter, and a power supply relay, which correspond to each other. The relay current limiting value is a current limiting value calculated based on the temperature of the power supply relay. The coil current limiting value is a current limiting value calculated based on the temperature of a choke coil.
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4.发明授权公开(公告)号：US10227085B2
公开(公告)日：2019-03-12
申请号：US15670992
申请日：2017-08-07
Applicant: DENSO CORPORATION
Inventor： Ryo Kano , Takashi Suzuki
Abstract: A rotary electrical machine control apparatus is provided which controls drive of a rotary electrical machine having a plurality of winding sets. The apparatus includes inverters that are provided so as to respectively correspond to the winding sets, a temperature detection element that detects a base element that is used as a base for estimation of inverter temperatures, which are temperatures of the inverters, and a control section that has a temperature estimation section that estimates the inverter temperatures based on the base temperature and a temperature change amount generated due to current application to the inverters. On-resistance of the switching elements of the first inverter is smaller than on-resistance of the switching elements of the second inverter. The temperature detection element is disposed in an area, a distance between the area and the first inverter being shorter than a distance between the area and the second inverter.
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5.发明申请公开(公告)号：US20180219499A1
公开(公告)日：2018-08-02
申请号：US15880264
申请日：2018-01-25
Applicant: DENSO CORPORATION
Inventor： Ryo Kano , Takashi Suzuki
IPC: H02P6/10 , B62D5/04 , H02P25/22 , G01R19/00 , H02P21/20 , H02P29/024 , H02P29/032
CPC classification number: H02P6/10 , B62D5/0484 , B62D5/0496 , G01R19/0053 , H02P21/20 , H02P25/22 , H02P29/027 , H02P29/032 , H02P29/60
Abstract: In a rotary electrical machine control apparatus, a selection section selects a relay current limiting value or a coil current limiting value depending on whether a plurality of systems are operated or one or more but not all of the plurality of systems are operated. The system is a combination of a winding set, an inverter, and a power supply relay, which correspond to each other. The relay current limiting value is a current limiting value calculated based on the temperature of the power supply relay. The coil current limiting value is a current limiting value calculated based on the temperature of a choke coil.
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Patent Agency Ranking
公开(公告)号：US20160248349A1
公开(公告)日：2016-08-25
申请号：US15046173
申请日：2016-02-17
Applicant: DENSO CORPORATION
Inventor： Ryo Kano , Takashi Suzuki
Abstract: A power converter a controller that includes an instruction calculator calculating a first voltage instruction value that is applied to a first winding group, for example. An application voltage to the first winding group is controlled, for example, in a first period so that a first neutral point voltage shifts below a center-of-output value of an outputtable range is outputted, and a second neutral point voltage shifts above the center-of-output value of the outputtable range. The instruction calculator calculates the first instruction value for enabling a switching between the periods, after a lapse of a switch period that is variably calculated based on a preset physical quantity. In such manner, a ripple of a torque or an electric current accompanying the switching between the periods is reduced.
Abstract translation: 一种电力转换器，包括例如计算应用于第一绕组组的第一电压指令值的指令计算器的控制器。 第一绕组组的施加电压例如在第一时间段中被控制，使得第一中性点电压偏移到可输出范围的输出中心值以下，并且第二中性点电压在 输出范围的输出中心值。 指令计算器计算用于在经过基于预设物理量可变地计算的开关周期之后的周期之间进行切换的第一指令值。 以这种方式，伴随着周期之间的切换的扭矩或电流的波动减小。
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公开(公告)号：US09213678B2
公开(公告)日：2015-12-15
申请号：US13939760
申请日：2013-07-11
Inventor： Yasuhiko Mukai , Yoshifumi Morita , Hiroyuki Ukai , Makoto Iwasaki , Hiroyasu Otake , Ryo Kano
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：US11370477B2
公开(公告)日：2022-06-28
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：US09954470B2
公开(公告)日：2018-04-24
申请号：US15616623
申请日：2017-06-07
Applicant: DENSO CORPORATION
Inventor： Ryo Kano
CPC classification number: H02P6/28 , B62D5/0463 , H02P25/22 , H02P29/64
Abstract: An apparatus for controlling operation of a rotating electric machine including a plurality of winding sets. The apparatus includes a plurality of inverters for the respective winding sets and a control unit. The control unit includes a physical quantity comparator configured to compare physical quantities that are responsive to power supplied to the respective winding sets, a temperature estimator configured to estimate system temperatures that are temperatures of respective systems, each of which systems is a combination of a respective one of the plurality of winding sets and its associated components, and a parameter modifier configured to modify a parameter used to estimate a temperature of each system in response to a result of comparison between the physical quantities.
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公开(公告)号：US09553530B2
公开(公告)日：2017-01-24
申请号：US15046173
申请日：2016-02-17
Applicant: DENSO CORPORATION
Inventor： Ryo Kano , Takashi Suzuki
Abstract: A power converter a controller that includes an instruction calculator calculating a first voltage instruction value that is applied to a first winding group, for example. An application voltage to the first winding group is controlled, for example, in a first period so that a first neutral point voltage shifts below a center-of-output value of an outputtable range is outputted, and a second neutral point voltage shifts above the center-of-output value of the outputtable range. The instruction calculator calculates the first instruction value for enabling a switching between the periods, after a lapse of a switch period that is variably calculated based on a preset physical quantity. In such manner, a ripple of a torque or an electric current accompanying the switching between the periods is reduced.
Abstract translation: 一种电力转换器，包括例如计算应用于第一绕组组的第一电压指令值的指令计算器的控制器。 第一绕组组的施加电压例如在第一时间段中被控制，使得第一中性点电压偏移到可输出范围的输出中心值以下，并且第二中性点电压在 输出范围的输出中心值。 指令计算器计算用于在经过基于预设物理量可变地计算的开关周期之后的周期之间进行切换的第一指令值。 以这种方式，伴随着周期之间的切换的扭矩或电流的波动减小。
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