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1. 发明申请

US20110005855A1 MOTOR CONTROLLER AND ELECTRIC POWER STEERING SYSTEM 有权
标题翻译：电机控制器和电力转向系统
公开(公告)号：US20110005855A1
公开(公告)日：2011-01-13
申请号：US12828417
申请日：2010-07-01
申请人： Satoru MIKAMO , Atsuo Sakai
发明人： Satoru MIKAMO , Atsuo Sakai
IPC分类号： B62D5/04 , H02P6/08
CPC分类号： H02P21/04 , B62D5/046 , H02M7/5395 , H02M2001/0009 , H02P21/16 , H02P21/22 , H02P27/08
摘要： A motor controller and an electric power steering system including the motor controller are provided. The motor controller has a microcomputer. When the on time of one of the lower potential-side FETs corresponding to the respective phases in a drive circuit becomes shorter than the detection time for detecting the phase current value, the microcomputer estimates the phase current value of the electric current undetectable phase based on the phase current values of the two phases other than the electric current undetectable phase corresponding to the relevant FET (blind estimation). When electric current detection is performed in the blind estimation, motor control signals are output, by which the switching state of the switching arm of the electric current undetectable phase is maintained and the power loss caused by the switching operation of the FETs in the two phases other than the electric current undetectable phase is compensated for.
摘要翻译：提供了一种电动机控制器和包括电动机控制器的电动助力转向系统。电机控制器有一台微机。当与驱动电路中的各相对应的低电位侧FET之一的导通时间比检测相电流值的检测时间短时，微机根据电流检测相位估计相电流值两相以外的相电流值除电流不可检测相位对应于相关FET（盲估计）。在盲目估计中进行电流检测时，输出电动机控制信号，通过该电动机控制信号保持电流不可检测相位的开关臂的开关状态，并且由两相中的FET的开关动作引起的功率损耗除了电流检测不到的相位被补偿。

2. 发明授权

US08294407B2 Motor controller and electric power steering system 有权
标题翻译：电机控制器和电动助力转向系统
公开(公告)号：US08294407B2
公开(公告)日：2012-10-23
申请号：US12828417
申请日：2010-07-01
申请人： Satoru Mikamo , Atsuo Sakai
发明人： Satoru Mikamo , Atsuo Sakai
IPC分类号： H02P27/00
CPC分类号： H02P21/04 , B62D5/046 , H02M7/5395 , H02M2001/0009 , H02P21/16 , H02P21/22 , H02P27/08
摘要： A motor controller and an electric power steering system including the motor controller are provided. The motor controller has a microcomputer. When the on time of one of the lower potential-side FETs corresponding to the respective phases in a drive circuit becomes shorter than the detection time for detecting the phase current value, the microcomputer estimates the phase current value of the electric current undetectable phase based on the phase current values of the two phases other than the electric current undetectable phase corresponding to the relevant FET (blind estimation). When electric current detection is performed in the blind estimation, motor control signals are output, by which the switching state of the switching arm of the electric current undetectable phase is maintained and the power loss caused by the switching operation of the FETs in the two phases other than the electric current undetectable phase is compensated for.
摘要翻译：提供了一种电动机控制器和包括电动机控制器的电动助力转向系统。电机控制器有一台微机。当与驱动电路中的各相对应的低电位侧FET之一的导通时间比检测相电流值的检测时间短时，微机根据电流检测相位估计相电流值两相以外的相电流值除电流不可检测相位对应于相关FET（盲估计）。在盲目估计中进行电流检测时，输出电动机控制信号，通过该电动机控制信号保持电流不可检测相位的开关臂的开关状态，并且由两相中的FET的开关动作引起的功率损耗除了电流检测不到的相位被补偿。

3. 发明授权

US07913805B2 Electric power steering apparatus 有权
标题翻译：电动助力转向装置
公开(公告)号：US07913805B2
公开(公告)日：2011-03-29
申请号：US12688250
申请日：2010-01-15
申请人： Akihiro Tomita , Atsuo Sakai , Satoru Mikamo
发明人： Akihiro Tomita , Atsuo Sakai , Satoru Mikamo
IPC分类号： B62D5/04
CPC分类号： B62D5/046 , H02P21/06 , H02P21/18 , H02P2205/05
摘要： A rotational angle sensor used in an electric power steering apparatus detects a rotational angle of a motor shaft at a portion on a steering system side, as a motor rotational angle (θm). A MPU sets a base correction amount (Δθ′m) based on a q-axis actual current value (Iq). The MPU sets a rotational angle correction amount (Δθm) used to correct the motor rotational angle (θm) by decreasing the base correction amount (Δθ′m) as a rotational angular speed (ω) increases and by increasing the base correction amount (Δθ′m) as a torque differential value (dT/dt) increases.
摘要翻译：在电动助力转向装置中使用的旋转角度传感器作为电动机旋转角度（＆amp; m）检测转向系统侧的部分处的电动机轴的旋转角度。 MPU根据q轴实际电流值（Iq）设置基准校正量（＆Dgr;＆amp; tt; m）。 MPU通过减小基准校正量（＆Dgr;＆amp; tt; m）来设定用于校正电动机旋转角度（＆amp; m;）的旋转角度校正量（＆Dgr;＆amp; t; m），因为旋转角速度（ω）增加并且随着转矩差分值（dT / dt）的增加，增加基本校正量（＆Dgr;＆amp; t; m）。

4. 发明申请

US20100026227A1 MOTOR CONTROL DEVICE 有权
标题翻译：电机控制装置
公开(公告)号：US20100026227A1
公开(公告)日：2010-02-04
申请号：US12444697
申请日：2007-10-05
申请人： Atsuo Sakai
发明人： Atsuo Sakai
IPC分类号： H02H7/09
CPC分类号： H02P6/12 , B62D5/0487 , G01R31/343 , H02P29/0243 , H02P29/028
摘要： A microcomputer compares a low voltage LV and a middle voltage MV to a predetermined voltage Vth set at a value in the vicinity of the grounded voltage (0 V) on the basis of detected phase voltages Vu, Vv and Vw, and thus, detects a break in a power supply line.
摘要翻译：微型计算机基于检测到的相电压Vu，Vv和Vw将低电压LV和中间电压MV进行比较，将其设定为接地电压（0V）附近的值的规定电压Vth，从而检测出突破电源线。

5. 发明授权

US07129660B2 Motor-temperature estimation apparatus and motor control apparatus 有权
标题翻译：电动机温度推定装置及电动机控制装置
公开(公告)号：US07129660B2
公开(公告)日：2006-10-31
申请号：US10508249
申请日：2003-03-18
申请人： Shuji Fujita , Atsuo Sakai
发明人： Shuji Fujita , Atsuo Sakai
IPC分类号： H02K17/32 , H02K23/68 , H02K27/30 , H02P7/00
CPC分类号： H02P23/14 , H02P21/16
摘要： A motor-current square value calculation section 45 calculates, as a motor-current square value, the sum of respective square values of two phase currents converted from three phase currents flowing through an electric motor. A temperature estimation calculation section 44 performs low-pass filtering for the motor-current square value, and calculates temperature increases of the mass portion and coils on the basis of the filtered motor-current square value. In the low-pass filtering, filtering calculation is performed in a manner which changes depending on rotational speed RV of the electric motor; i.e., whether the electric motor is in a rotating state or in a stopped state. The temperature increase of the mass portion is added to ambient temperature of the electric motor to thereby estimate temperature of the mass portion, and the temperature increase of the coils is added to the estimated temperature of the mass portion to thereby estimate temperature of the coils. Accordingly, the coil temperature of the electric motor can be accurately detected, and current flowing through the electric motor is properly controlled in accordance with the detected temperature.
摘要翻译：电动机电流方差值计算部45计算作为电动机电流平方值，从流过电动机的三相电流转换出的两相电流的平方值的和。温度推定计算部44对电动机电流平方值进行低通滤波，根据滤波后的电动机电流平方值，计算质量部和线圈的温度上升。在低通滤波中，以电动机的转速RV变化的方式进行滤波运算; 即电动机是处于旋转状态还是处于停止状态。将质量部分的温度升高加到电动机的环境温度上，从而估计质量部分的温度，并且将线圈的温度升高加到质量部分的估计温度上，从而估计线圈的温度。因此，可以精确地检测电动机的线圈温度，并且根据检测到的温度适当地控制流过电动机的电流。

6. 发明申请

US20110205672A1 MOTOR CONTROLLER AND ELECTRIC POWER STEERING DEVICE 审中-公开
标题翻译：电机控制器和电力转向装置
公开(公告)号：US20110205672A1
公开(公告)日：2011-08-25
申请号：US13061657
申请日：2009-09-14
申请人： Atsuo Sakai
发明人： Atsuo Sakai
IPC分类号： H02H9/00
CPC分类号： B62D5/0487 , G01R31/3277 , H02P29/032
摘要： A microcomputer detects and determines whether a problem exists in a power supply breaker of an ECU functioning as a motor controller. Specifically, the microcomputer determines whether there is a malfunction caused by a short circuit in a first FET based on the output voltage and output voltage that are detected in a first FET and a second FET, respectively, when the switching states of the first and second FETs are both off. Afterwards, the microcomputer determines whether there is a malfunction caused by a break in the first FET based on the output voltages of the first and second FETs that are detected when only the first FET is switched on. If the microcomputer determines that the first FET is free from any malfunction, the microcomputer determines whether there is a malfunction caused by a short circuit or a break in the second FET by comparing the output voltage of the first FET and a charge voltage of a smoothing capacitor that are detected afterwards.
摘要翻译：微型计算机检测并确定用作电动机控制器的ECU的电源断路器中是否存在问题。具体地说，微型计算机基于在第一和第二FET的开关状态分别基于在第一FET和第二FET中检测到的输出电压和输出电压，分别确定是否存在由第一FET中的短路引起的故障 FET都关闭。之后，微型计算机基于当仅第一FET接通时检测到的第一和第二FET的输出电压来确定是否存在由第一FET中断引起的故障。如果微型计算机确定第一FET没有任何故障，则微型计算机通过比较第一FET的输出电压和平滑的充电电压来确定是否存在由于第二FET的短路或中断引起的故障以后检测到的电容器。

7. 发明授权

US06948382B2 Angle detection device and torque sensor incorporating angle detection device 有权
标题翻译：角度检测装置和扭矩传感器结合角度检测装置
公开(公告)号：US06948382B2
公开(公告)日：2005-09-27
申请号：US10721508
申请日：2003-11-26
申请人： Atsuo Sakai , Jiro Nakano , Tsutomu Matsumoto
发明人： Atsuo Sakai , Jiro Nakano , Tsutomu Matsumoto
IPC分类号： G01L3/10 , B62D5/04 , B62D15/02 , G01B7/00 , G01B7/30 , G01D5/20 , G01D5/244 , G01D5/245 , G01L5/22 , G01L3/02
CPC分类号： B62D15/0215 , B62D6/10 , G01D5/2073 , G01D5/2448 , G01L5/221
摘要： An angle detection device that accurately detects a rotational angle even if the ratio of an detection voltage relative to an excitation voltage of a resolver fluctuates. The angle detection device includes an angle detector and a controller connected to the angle detector. The angle detector includes an excitation coil, which is arranged on a predetermined rotary shaft and supplied with excitation voltage, and a pair of detection coils. Each detection coil is arranged near the excitation coil to induce detection voltage when excitation voltage excites the excitation coil. The detection voltages of the detection coils have different phases. A controller calculates the rotational angle of the excitation coil with the detection voltages induced to the detection coils. Further, the controller includes a correction unit for correcting the amplitude of the excitation voltage to maintain each of the induced detection voltages at a predetermined value.
摘要翻译：即使检测电压相对于分解器的激励电压的比率发生波动，也能够准确地检测旋转角度的角度检测装置。角度检测装置包括角度检测器和连接到角度检测器的控制器。角度检测器包括布置在预定旋转轴上并被提供激励电压的励磁线圈和一对检测线圈。每个检测线圈布置在励磁线圈附近，以在励磁电压激励励磁线圈时引发检测电压。检测线圈的检测电压具有不同的相位。控制器利用感应到检测线圈的检测电压来计算励磁线圈的旋转角度。此外，控制器包括用于校正激励电压的振幅以将每个感应检测电压保持在预定值的校正单元。

8. 发明授权

US06796400B2 Electric power steering mechanism control method and electric power steering mechanism 有权
标题翻译：电动助力转向机构控制方法及电动助力转向机构
公开(公告)号：US06796400B2
公开(公告)日：2004-09-28
申请号：US10235709
申请日：2002-09-06
申请人： Akira Ito , Atsuo Sakai
发明人： Akira Ito , Atsuo Sakai
IPC分类号： B62D504
CPC分类号： B62D5/049
摘要： The electric power steering mechanism restricts a drive power supplied to a motor to less than a predetermined value if it detects a period of more than 200 mS in which the condition (1) that there is no change in the rotation angle of the rotation angle sensor and the condition (2) that the steering torque is over 7 Nm are satisfied at the same time. Consequently, torque generated by the motor is reduced, so that if end contact state is present, a rack shaft is returned in an opposite direction to the rack end by a reaction of a tire and as a result, a steering shaft is rotated, thereby the motor and the rotation angle sensor being rotated. That is, it is detected that the end contact state is present if there is a change in the rotation angle (Yes in (4) due to decrease in the drive power and that the motor remains stopped due to other reason if there is no change in the rotation angle (No in (4)).
摘要翻译：如果检测到旋转角度传感器的旋转角度没有变化的条件（1）超过200mS的周期，则电动动力转向机构将提供给电动机的驱动力限制在小于预定值同时满足转向转矩超过7 Nm的条件（2）。因此，由电动机产生的扭矩减小，如果存在端接触状态，则由于轮胎的反作用，齿条轴以与框架端相反的方向返回，结果转向轴转动马达和旋转角度传感器旋转。也就是说，如果旋转角度发生变化（由于（4）中的“是”），由于驱动功率的降低而导致电动机由于其他原因而停止，如果没有变化，则检测到端接触状态旋转角度（（4）中的否））。

9. 发明授权

US08217600B2 Motor control device and electric power steering system 有权
标题翻译：电机控制装置和电动助力转向系统
公开(公告)号：US08217600B2
公开(公告)日：2012-07-10
申请号：US12876404
申请日：2010-09-07
申请人： Atsuo Sakai
发明人： Atsuo Sakai
IPC分类号： H02P6/06
CPC分类号： B62D5/046 , H02P21/22
摘要： A motor control device is configured in such a manner that a current detection circuit and an exciting circuit for a motor resolver share one grounding wire. A microcomputer that serves as a current detector sets a phase of an exciting current in such a manner that values of an excitation noise superimposed on an output voltage of the current detection circuit at respective timings (L1, H1, L2, H2, . . . ), at which the output voltage is acquired in one current detection process, are equal to each other. An electric power steering system is provided with the motor control device.
摘要翻译：电动机控制装置被配置为使得电动机解算器的电流检测电路和激励电路共享一个接地线。作为电流检测器的微型计算机以这样的方式设定励磁电流的相位，使得在各个定时（L1，H1，L2，H2 ...）叠加在电流检测电路的输出电压上的激励噪声的值。），其中在一个电流检测处理中获取输出电压彼此相等。电动助力转向系统配有电动机控制装置。

10. 发明授权

US06727669B2 Motor-driven power steering apparatus 有权
标题翻译：电动助力转向装置
公开(公告)号：US06727669B2
公开(公告)日：2004-04-27
申请号：US10244557
申请日：2002-09-17
申请人： Hiroshi Suzuki , Atsuo Sakai , Kazuhiko Ito
发明人： Hiroshi Suzuki , Atsuo Sakai , Kazuhiko Ito
IPC分类号： H02P100
CPC分类号： B62D5/046 , B62D5/0463
摘要： A motor-driven power steering apparatus includes a motor for generating assisting force to be imparted to a steering mechanism, a control signal generation section for generating a motor control signal on the basis of at least steering torque applied to a steering wheel, a motor drive unit for driving the motor in accordance with the motor control signal, and a step-up circuit provided between a battery to the motor drive unit. The step-up circuit includes a step-up coil whose one end is connected to the battery, a first switching element connected between the other end of the step-up coil and the ground, a second switching element connected between the other end of the step-up coil and an output terminal, and a capacitor connected between the output terminal and the ground and smoothing output voltage appearing at the output terminal. The apparatus further includes a step-up circuit control unit which detects the output voltage and controls the first and second switching elements on the basis of difference between a target output voltage and the detected output voltage. During power generation periods, at least the first switching element is turned on and off in order to increase the output voltage supplied to the motor through step-up operation. During regeneration periods, at least the second switching element is turned on and off.
摘要翻译：一种电动助力转向装置，包括用于产生赋予转向机构的辅助力的电动机，控制信号生成部，其根据施加于方向盘的至少转向转矩，电动机驱动用于根据电动机控制信号驱动电动机的单元，以及设置在电动机驱动单元之间的电池的升压电路。升压电路包括一端连接到电池的升压线圈，连接在升压线圈的另一端与地之间的第一开关元件，连接在升压线圈的另一端之间的第二开关元件升压线圈和输出端子，以及连接在输出端子和地之间的电容器，并且在输出端子处出现平滑的输出电压。该装置还包括升压电路控制单元，其基于目标输出电压和检测到的输出电压之间的差异来检测输出电压并控制第一和第二开关元件。在发电期间，至少第一开关元件被接通和断开，以通过升压操作来增加提供给电动机的输出电压。在再生期间，至少第二开关元件被接通和断开。

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