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11. 发明授权

US4808902A Control apparatus for brush-less motor 失效
标题翻译：无刷电机控制装置
公开(公告)号：US4808902A
公开(公告)日：1989-02-28
申请号：US197327
申请日：1988-05-23
申请人： Masanori Miyazaki , Akihiko Kuroiwa
发明人： Masanori Miyazaki , Akihiko Kuroiwa
IPC分类号： H02P6/08 , H02H7/08 , H02P6/12 , H02P25/02 , H02P5/40
CPC分类号： H02H7/0833 , H02P25/03
摘要： Disclosed is a control apparatus for a brush-less motor, which can prevent commutation failure of an inverter for driving the motor. The control apparatus, according to the invention detects a counter EMF of the motor, and the detected counter EMF is applied to a PLL circuit. In the course of normal operation of the motor, an output of the PLL circuit is used for controlling the advanced control angle of a motor drive inverter. Any abnormality in the condition of the motor, such as that arising from an abrupt change in load of the motor, causes a sudden and substantial variation in the magnitude and phase of the counter EMF. Since the internal condition of the PLL circuit changes in response to this counter EMF variation, a signal generated by the PLL circuit is therefore used to detect the counter EMF variation. This internal signal is compared with a predetermined limit level, and when its signal level is found to exceed this limit level, operation of the motor drive inverter is stopped, whereby commutation failure of the inverter is prevented.
摘要翻译：公开了一种无刷马达的控制装置，其能够防止用于驱动马达的逆变器的换向故障。根据本发明的控制装置检测电动机的反电动势，并且检测到的计数器EMF被施加到PLL电路。在电机正常运行的过程中，PLL电路的输出用于控制电动机驱动逆变器的先进控制角。马达状态的任何异常，例如马达的负载突然变化引起的异常，都会引起反电动势的大小和相位的突然变化。由于PLL电路的内部状态响应于该EMF变化而变化，因此由PLL电路产生的信号用于检测反EMF变化。该内部信号与预定的限制电平进行比较，当发现其信号电平超过该极限电平时，停止电动机驱动逆变器的动作，防止逆变器的换向故障。

12. 发明授权

US4780650A Control system for a power converter for driving induction motors 失效
标题翻译：用于驱动感应电动机的功率转换器的控制系统
公开(公告)号：US4780650A
公开(公告)日：1988-10-25
申请号：US767629
申请日：1985-08-20
申请人： Masanori Miyazaki , Yoshihiro Ogashi
发明人： Masanori Miyazaki , Yoshihiro Ogashi
IPC分类号： H02P5/46 , H02P5/40
CPC分类号： H02P5/46
摘要： In a control system for a power converter for driving induction motors, the control system separately controlling an exciting current component of the primary current of the induction motors contributing to generation of a magnetic flux and a torque current component of the primary current contributing to generation of a torque, a voltage detecting device detects the output voltage of the power converter, and a correcting device responds to the voltage detecting device for determining a current correction for correcting at least one of the exciting current component and the torque current component to reduce the difference of the detected voltage from a reference value of the output voltage.
摘要翻译：在用于驱动感应电动机的功率转换器的控制系统中，控制系统分别控制有助于产生磁通量的感应电动机的一次电流的励磁电流分量和有助于产生电流的一次电流的转矩电流分量扭矩，电压检测装置检测功率转换器的输出电压，并且校正装置响应于电压检测装置，用于确定用于校正励磁电流分量和转矩电流分量中的至少一个的当前校正，以减小差异的检测电压从输出电压的参考值。

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