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1. 发明专利

JP2002211425A ELECTRIC POWER STEERING DEVICE 失效
公开(公告)号：JP2002211425A
公开(公告)日：2002-07-31
申请号：JP2001007366
申请日：2001-01-16
申请人： NSK LTD , TOYOTA MOTOR CORP
发明人： KAWADA HIDEAKI , ITAKURA HIROSUKE , OKAZAKI HIDEAKI , MURATA MASAHIRO , SAKATA KATSUTOSHI
IPC分类号： G01K7/00 , B62D5/04 , B62D6/00 , B62D101/00 , B62D119/00 , B62D137/00 , H02P29/02
摘要： PROBLEM TO BE SOLVED: To provide an electric power steering device having a function on a substitutive control used when a temperature sensor fails. SOLUTION: This electric power steering device comprises a function to limit a motor current based on the temperature sensor installed on the motor driving part of a control unit and a function to calculate an estimated motor temperature by adding a rise temperature calculated based on the motor current to an initial temperature where the temperature of the control unit when an ignition switch is turned on is regarded as the initial temperature of the motor and to limit the motor current based on the estimated motor temperature. When the temperature sensor is judged to be defective, a current is outputted to the motor based on the assist characteristics at the time of occurrence of the failure where the smaller continuous rated current of the control unit or the motor is considered to be the maximum.

2. 发明专利

JP2008154422A Motor driving controller and motor power steering system using same 有权
标题翻译：电机驱动控制器和使用相同的电机转向系统
公开(公告)号：JP2008154422A
公开(公告)日：2008-07-03
申请号：JP2006342570
申请日：2006-12-20
申请人： Nsk Ltd , 日本精工株式会社
发明人： MIYAZAWA YASUSHI , KAWADA HIDEAKI
IPC分类号： H02P7/29 , B62D5/04 , B62D6/00 , B62D101/00 , B62D119/00
摘要： PROBLEM TO BE SOLVED: To provide a motor driving controller which can securely suppress a of rush current by appropriately keeping charge voltage to a capacitor and to provide a motor power steering system using the controller.
SOLUTION: The motor driving controller includes an electric motor 13, and a motor driving circuit 110 which drive-controls the electric motor 13 based on power from a DC power supply 15. The controller also includes a power relay circuit 120 arranged between the DC power supply 15 and the motor driving circuit 110 and a precharge circuit 150 installed in parallel to the power relay circuit 120. The precharge circuit 150 includes a capacitor 151 connected between a motor driving circuit-side contact of the power relay circuit 120 and a ground, a series circuit 155 of a switching element 152 and a precharge resistor 154, which are connected in parallel to the power relay circuit 120, and a precharge driving part 101 driving the switching element 152 by a pulse width modulation signal.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种电动机驱动控制器，通过适当地保持对电容器的充电电压并提供使用该控制器的电动机动力转向系统，可以可靠地抑制冲击电流。电动机驱动控制器包括电动机13和基于来自直流电源15的电力驱动控制电动机13的电动机驱动电路110.控制器还包括功率继电器电路120，其布置在直流电源15和电动机驱动电路110以及与电力继电器电路120并联安装的预充电电路150.预充电电路150包括：电容器151，其连接在电力继电器电路120的电动机驱动电路侧接点与接地，与功率继电器电路120并联连接的开关元件152和预充电电阻器154的串联电路155以及通过脉冲宽度调制信号驱动开关元件152的预充电驱动部101。版权所有（C）2008，JPO＆INPIT

3. 发明专利

JP2006290146A Control device of electric power steering device 审中-公开
标题翻译：电动转向装置的控制装置
公开(公告)号：JP2006290146A
公开(公告)日：2006-10-26
申请号：JP2005113311
申请日：2005-04-11
申请人： Nsk Ltd , 日本精工株式会社
发明人： SHINGO MASANORI , KAWADA HIDEAKI
IPC分类号： B62D5/04 , B62D6/00 , B62D101/00 , B62D119/00 , B62D137/00
摘要： PROBLEM TO BE SOLVED: To provide a control device of an electric power steering device capable of certainly carrying out fail judgement by offsetting output voltage of an electric current detection circuit by varying standard voltage by a microcomputer, etc. by providing the standard voltage in the electric current detection circuit of a motor and setting this offset output voltage by regarding it as the output voltage when a steering wheel is at a neutral position. SOLUTION: This control device of the electric power steering device devised to feedback-control working of the motor in accordance with a motor electric current detected by the electric current detection circuit of the motor is furnished with the electric current detection circuit, a shunt resistor to detect the motor electric current and a voltage detection circuit to detect both end voltage of the shunt resistor, and is devised to offset the output voltage of the electric current detection circuit, to set the standard voltage to recognize the voltage as the steering wheel neutral position and to judge it as failure when the output voltage becomes less than a threshold value. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供一种电动助力转向装置的控制装置，其能够通过通过提供标准的微型计算机等来改变标准电压来抵消电流检测电路的输出电压来肯定地执行故障判断电动机的电流检测电路中的电压，并且通过将其作为方向盘处于中立位置时的输出电压来设定该偏移输出电压。解决方案：根据由电动机的电流检测电路检测到的电动机电流来设计用于对电动机的工作进行反馈控制的电动助力转向装置的该控制装置配备有电流检测电路，用于检测电动机电流的分流电阻和用于检测分流电阻器的两端电压的电压检测电路，并且设计成抵消电流检测电路的输出电压，以设置标准电压以识别作为转向的电压并且当输出电压变得小于阈值时将其判断为故障。版权所有（C）2007，JPO＆INPIT

4. 发明专利

JP2007308138A Control device for electric power steering device 有权
标题翻译：电动转向装置的控制装置
公开(公告)号：JP2007308138A
公开(公告)日：2007-11-29
申请号：JP2007152465
申请日：2007-06-08
申请人： Nsk Ltd , 日本精工株式会社
发明人： KAWADA HIDEAKI
IPC分类号： B62D6/00 , B62D5/04 , B62D101/00 , B62D119/00 , B62D137/00 , H02P7/29
摘要： PROBLEM TO BE SOLVED: To surely detect a failure of a current detection circuit of an electric power steering device, and to switch a control system from a feedback system to an open-loop system when the failure is detected.
SOLUTION: A control device for an electric power steering device comprises: a torque sensor 10 for detecting steering torque of a steering wheel; a motor 20 for supplementally energizing a load on a steering shaft provided integrally with the steering wheel; and a control unit 30 for driving the motor through the feedback system in accordance with a magnitude of the steering torque. The control unit has the current detection circuit 38 of the motor and a failure detection circuit 310 for detecting a failure of the current detection circuit. The feedback system is switched to the open loop system when a failure of the current detection circuit is detected by the failure detection circuit.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：确定检测到电动助力转向装置的电流检测电路的故障，并且在检测到故障时将控制系统从反馈系统切换到开环系统。解决方案：一种用于电动助力转向装置的控制装置，包括：扭矩传感器10，用于检测方向盘的转向转矩; 电动机20，用于对与方向盘一体设置的转向轴上的负载进行补充动力; 以及控制单元30，用于根据转向转矩的大小通过反馈系统驱动电动机。控制单元具有电动机的电流检测电路38和用于检测电流检测电路的故障的故障检测电路310。当故障检测电路检测到电流检测电路的故障时，反馈系统切换到开环系统。版权所有（C）2008，JPO＆INPIT

5. 发明专利

JP2007276741A Electric power steering device 有权
标题翻译：电动转向装置
公开(公告)号：JP2007276741A
公开(公告)日：2007-10-25
申请号：JP2006109137
申请日：2006-04-11
申请人： Nsk Ltd , 日本精工株式会社
发明人： OSHIMA ATSUSHI , KAWADA HIDEAKI , SEKINE TAKAAKI , KASHIMOTO KEIJI
IPC分类号： B62D5/04 , B62D1/19
摘要： PROBLEM TO BE SOLVED: To provide an electric power steering device capable of miniaturizing a whole constitution of a control unit while sufficiently exhibiting heat release effect of a heat generation member.
SOLUTION: The electric power steering device is provided with a steering column 3 internally attached with a steering shaft 2 transmitted with steering torque; an electric motor for transmitting steering assistant force to the steering shaft 2 through a deceleration mechanism in a deceleration gear box 4. A control unit 19 is attached to the deceleration gear box 4 and includes at least a control substrate mounted with an instruction value operation part for operating a drive instruction value of the electric motor 5; and a power module substrate mounted with a power module with heat generation for driving/controlling the electric motor based on the drive instruction value from the instruction value operation part. The power module substrate 23 is directly attached to a control unit attachment surface 20a of the deceleration gear box 4 through a high heat conduction plate part 22.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：解决问题的方案：提供一种电动助力转向装置，其能够在充分发挥制热构件的放热效果的同时，使控制单元的整体结构小型化。解决方案：电动助力转向装置设有转向柱3，转向柱3内装有转向轴2，转向轴2以转向转矩传递; 用于通过减速齿轮箱4中的减速机构向转向轴2传递转向辅助力的电动机。控制单元19安装在减速齿轮箱4上，至少包括安装有指令值操作部分的控制基板用于操作电动机5的驱动指令值; 以及功率模块基板，其安装有具有用于驱动/控制电动机的发热的功率模块，其基于来自指令值操作部分的驱动指令值。功率模块基板23通过高导热板部分22直接附接到减速齿轮箱4的控制单元附接表面20a。（C）2008，JPO＆INPIT

6. 发明专利

JP2007185991A Electric power steering system 审中-公开
标题翻译：电力转向系统
公开(公告)号：JP2007185991A
公开(公告)日：2007-07-26
申请号：JP2006003560
申请日：2006-01-11
申请人： Nsk Ltd , 日本精工株式会社
发明人： SHINGO MASANORI , KAWADA HIDEAKI
IPC分类号： B62D5/04 , B62D6/00 , B62D101/00 , B62D107/00 , B62D119/00
摘要： PROBLEM TO BE SOLVED: To provide an electric power steering system including a motor for generating steering auxiliary torque to a steering shaft according to steering torque applied to the steering shaft and a control unit for controlling the motor according to a current value of the motor detected by a current detector, capable of suppressing heat generation without increasing the capacity of a heat sink in the control unit. SOLUTION: This electric power steering system including the motor for generating steering auxiliary torque to a steering shaft according to steering torque applied to the steering shaft and the control unit for controlling the motor according to a detected value of the motor by a current detector cools down a heat generating area in the control unit using Peltier elements. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：解决的问题：提供一种电动助力转向系统，其包括根据施加到转向轴的转向转矩来向转向轴产生转向辅助转矩的电动机和用于根据当前值的电流控制电动机的控制单元由电流检测器检测的电动机，其能够抑制发热，而不增加控制单元中的散热器的容量。解决方案：该电动助力转向系统包括用于根据施加到转向轴的转向扭矩向转向轴产生转向辅助转矩的电动机和用于根据电动机的检测值通过电流控制电动机的控制单元检测器使用珀耳帖元件冷却控制单元中的发热区域。版权所有（C）2007，JPO＆INPIT

7. 发明专利

JP2007060771A Electric power steering device 有权
标题翻译：电动转向装置
公开(公告)号：JP2007060771A
公开(公告)日：2007-03-08
申请号：JP2005241545
申请日：2005-08-23
申请人： Nsk Ltd , 日本精工株式会社
发明人： KAWADA HIDEAKI , AOKI TOMOYASU
IPC分类号： H02P7/29 , B62D5/04 , B62D6/00
CPC分类号： B62D5/0463 , B62D5/0481
摘要： PROBLEM TO BE SOLVED: To continue auxiliary steering by avoiding a state that the steering of a steering wheel becomes heavy in operation, by securing a voltage applied to an electric motor, as much as possible, even if battery voltage is lowered. SOLUTION: This electric power steering device is constituted, such that the device comprises a control part 26 that controls switching elements on diagonal lines at the upper stage and the lower stage of an H-bridge circuit 25 at different duty ratios on the basis of steering torque acting on a steering system, and a power supply source 17 that supplies power to the H-bridge circuit 25; and the control part 26 drives the switching element FET 1 or FET 2 on the upper stage side of the H-bridge circuit 25 by a pulse-width modulation signal PWM1 or PWM2, when a voltage of the power supply source 17 is lower than the prescribed voltage, on-controls the switching element FET 4 or FET 3 at the lower stage side, and lowers a frequency of the pulse-width modulation signal to a frequency within the audible range from a frequency beyond of the audible range. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：即使电池电压降低，通过尽可能地确保施加到电动机上的电压，通过避免方向盘的转向操作的转向的状态来继续辅助转向。解决方案：该电动助力转向装置构成为使得该装置包括控制部分26，控制部分26以不同的占空比控制H桥电路25的上段和下级的对角线上的开关元件作用于转向系统的转向转矩的基础，以及向H桥电路25供电的电源17; 控制部26在电源17的电压比电源17的电压低的情况下，通过脉宽调制信号PWM1或PWM2驱动H电路电路25的上级侧的开关元件FET1或FET2 在低级侧对开关元件FET4或FET3进行控制，并将脉冲宽度调制信号的频率从可听范围以外的频率降低到可听范围内的频率。版权所有（C）2007，JPO＆INPIT

8. 发明专利

JP2005199899A Electric power steering device 有权
标题翻译：电动转向装置
公开(公告)号：JP2005199899A
公开(公告)日：2005-07-28
申请号：JP2004009020
申请日：2004-01-16
申请人： Nsk Ltd , Nsk Steering Systems Co Ltd , Nskステアリングシステムズ株式会社 , 日本精工株式会社
发明人： SAKAGUCHI TORU , NOMURA YASUTSUGU , KAWADA HIDEAKI
IPC分类号： B62D6/00 , B62D5/04 , B62D101/00 , B62D119/00
摘要： PROBLEM TO BE SOLVED: To provide an electric power steering device capable of limiting the duty ratio of the PWM signal to drive a semiconductor element of a motor drive circuit according to the detected value of the motor current when overcurrent flows in a motor, and preventing overheat burnout of the motor without impairing the steering feeling. SOLUTION: A duty ratio limiter 51 limits the duty ratio D in two steps according to the detected value of the motor current i if the motor current i is increased, and releases the duty ratio in two steps according to the detected value of the motor current i if the motor current i is reduced. When the motor current i exceeds the threshold in the first step, the duty ratio D is set to a predetermined value in the first step, and the motor drive is continued. When the motor current i exceeds the threshold in the second step, the duty ratio D is set to a further limited predetermined value in the second step, and the motor drive is continued while considerably suppressing the motor current i. Overheat burnout of a motor drive circuit is prevented while maintaining the steering feeling. COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供一种电动助力转向装置，其能够根据马达电流的检测值在电动机中过电流流动时限制PWM信号的占空比以驱动电动机驱动电路的半导体元件并且防止电动机过热烧坏而不损害转向感。
解决方案：如果电动机电流i增加，占空比限制器51根据电动机电流i的检测值在两个步骤中限制占空比D，并根据检测到的值的两个步骤释放占空比如果电动机电流i减小，则电动机电流i。当电动机电流i在第一步骤中超过阈值时，在第一步骤中将占空比D设定为预定值，并继续电动机驱动。当在第二步骤中电动机电流i超过阈值时，在第二步骤中将占空比D设定为进一步限制的预定值，并且在显着地抑制电动机电流i的同时继续电动机驱动。在保持转向感的同时防止电机驱动电路的过热烧坏。版权所有（C）2005，JPO＆NCIPI

9. 发明专利

JP2005088877A Control system of electric power steering device 有权
标题翻译：电力转向装置控制系统
公开(公告)号：JP2005088877A
公开(公告)日：2005-04-07
申请号：JP2004239828
申请日：2004-08-19
申请人： Nsk Ltd , 日本精工株式会社
发明人： KAWADA HIDEAKI
IPC分类号： B62D6/00 , B62D5/04 , B62D101/00 , B62D119/00 , H02P7/29
摘要： PROBLEM TO BE SOLVED: To detect a failure of a current detection circuit of an electric power steering device with reliability, and to switch a control system from a feedback system to an open loop system when a failure is detected.
SOLUTION: A control system of the electric power steering device is provided with a torque sensor for detecting steering torque of a steering wheel, a motor for supplementally energizing a load on a steering shaft provided integrally with the steering wheel, and a control unit for driving the motor through the feedback system in accordance with a magnitude of the steering torque. Then the control unit is provided with the current detection circuit of the motor and a failure detection circuit for detecting a failure of the current detection circuit. Then the feedback system is switched to the open loop system when a failure of the current detection circuit is detected by the failure detection circuit.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：可靠地检测电动转向装置的电流检测电路的故障，并且当检测到故障时将控制系统从反馈系统切换到开环系统。解决方案：电动助力转向装置的控制系统设置有用于检测方向盘的转向转矩的扭矩传感器，用于对与方向盘一体设置的转向轴上的负载进行补充动力的电动机，以及控制单元，用于根据转向转矩的大小通过反馈系统驱动电动机。然后，控制单元设置有电动机的电流检测电路和用于检测电流检测电路故障的故障检测电路。然后当故障检测电路检测到电流检测电路的故障时，将反馈系统切换到开环系统。版权所有（C）2005，JPO＆NCIPI

10. 发明专利

JP2002059854A CONTROL DEVICE FOR ELECTRIC POWER STEERING DEVICE 失效
公开(公告)号：JP2002059854A
公开(公告)日：2002-02-26
申请号：JP2000245484
申请日：2000-08-14
申请人： NSK LTD
发明人： KAWADA HIDEAKI , ITAKURA HIROSUKE , SAKAGUCHI TORU
IPC分类号： B62D6/00 , B62D5/04 , B62D101/00 , B62D119/00 , H02P7/06
摘要： PROBLEM TO BE SOLVED: To improve control property and safety property of an electric power steering device by controlling the same with two CPUs or MCUs of main and sub. SOLUTION: In a control device for an electric power steering device controlling a motor based on a steering assist command value calculated based on a steering torque generated on a steering shaft and an electric current control value calculated from an electric current value to the motor applying a steering assist force to a steering mechanism, a first control part and a second control part controlling the motor are provided. The second control part watches the first control part calculating the steering assist command value and performing motor drive control, based on a calculated electric current command value, and the function of the second control part watching the first control part is restricted in a condition that the first control part does not control the steering assist command value.

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