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公开(公告)号：US09163625B2
公开(公告)日：2015-10-20
申请号：US14359072
申请日：2012-11-15
CPC分类号： F04B49/06 , F04B17/03 , F04B49/065 , F04B2203/0201 , F04B2203/0202 , F04B2203/0204 , F04B2203/0209 , F04B2203/0213 , H02P1/42 , H02P5/68 , H02P6/18 , H02P6/28
摘要： In order to realize, without inviting cost increase, a control for maintaining a pressure of fluid delivered from a pump at a target value, a pump control unit is provided with a driver control unit controlling a rotational speed of a hydraulic pump through adjustment of a duty ratio of a PWM signal driving excitation coils of an electric motor. Further, the pump control unit is provided also with a signal correction circuit configured to convert a current flowing in the excitation coils to a voltage signal with using a shunt resistor and to divide the voltage signal with using a voltage division ratio setting circuit and to shorten an ON signal of the PWM signal by increasing the divided voltage. The voltage division ratio setting circuit has a characteristics of setting the divided voltage higher, the longer an ON period of the PWM signal.
摘要翻译： 为了实现在不增加成本的情况下，将从泵输送的流体的压力保持在目标值的控制，泵控制单元设置有驱动器控制单元，其通过调整液压泵的调节来控制液压泵的转速 驱动电动机的励磁线圈的PWM信号的占空比。 此外，泵控制单元还设置有信号校正电路，该信号校正电路被配置为使用分流电阻器将在励磁线圈中流动的电流转换为电压信号，并且使用分压比设置电路来分频电压信号并缩短 PWM信号的ON信号通过增加分压。 分压比设定电路具有将分压电压设定得较高的特性，PWM信号的导通周期越长。
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公开(公告)号：US20140286793A1
公开(公告)日：2014-09-25
申请号：US14359072
申请日：2012-11-15
IPC分类号： H02P23/14
CPC分类号： F04B49/06 , F04B17/03 , F04B49/065 , F04B2203/0201 , F04B2203/0202 , F04B2203/0204 , F04B2203/0209 , F04B2203/0213 , H02P1/42 , H02P5/68 , H02P6/18 , H02P6/28
摘要： In order to realize, without inviting cost increase, a control for maintaining a pressure of fluid delivered from a pump at a target value, a pump control unit is provided with a driver control unit controlling a rotational speed of a hydraulic pump through adjustment of a duty ratio of a PWM signal driving excitation coils of an electric motor. Further, the pump control unit is provided also with a signal correction circuit configured to convert a current flowing in the excitation coils to a voltage signal with using a shunt resistor and to divide the voltage signal with using a voltage division ratio setting circuit and to shorten an ON signal of the PWM signal by increasing the divided voltage. The voltage division ratio setting circuit has a characteristics of setting the divided voltage higher, the longer an ON period of the PWM signal.
摘要翻译： 为了实现在不增加成本的情况下，将从泵输送的流体的压力保持在目标值的控制，泵控制单元设置有驱动器控制单元，其通过调整液压泵的调节来控制液压泵的转速 驱动电动机的励磁线圈的PWM信号的占空比。 此外，泵控制单元还设置有信号校正电路，该信号校正电路被配置为使用分流电阻器将在励磁线圈中流动的电流转换为电压信号，并且使用分压比设置电路来分频电压信号并缩短 PWM信号的ON信号通过增加分压。 分压比设定电路具有将分压电压设定得较高的特性，PWM信号的导通周期越长。
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