公开(公告)号：US06774587B2

公开(公告)日：2004-08-10

申请号：US10255152

申请日：2002-09-25

Applicant: John E. Makaran ,  Dragan Radavcovic

Inventor： John E. Makaran ,  Dragan Radavcovic

IPC: H02P154

CPC classification number: H02P7/29 ,  H02P5/68

Abstract: A motor circuit includes a first brush-type motor, a second brush-type motor, a switch, and a pulse width modulation circuit. The first brush-type motor has a first voltage connection and a second voltage connection, the second voltage connection adapted to be coupled to a source of DC voltage. The second brush-type motor has a third voltage connection and a fourth voltage connection, the fourth voltage connection adapted to be coupled to the source of DC voltage. The switch has a control input, a first contact and a second contact, the first contact coupled to the source of DC voltage, and the second contact coupled to the first voltage connection and the third voltage connection. The switch is operable to selectively connect the first contact to the second contact based on a voltage at the control input. The pulse width modulation circuit is operable to generate a pulse width modulated (PWM) signal. The pulse width modulation circuit is operably coupled to provide the PWM signal to the control input of the switch.

Abstract translation: 电动机电路包括第一电刷型电动机，第二电刷型电动机，开关和脉冲宽度调制电路。 第一刷式电动机具有第一电压连接和第二电压连接，第二电压连接适于耦合到DC电压源。 第二刷式电动机具有第三电压连接和第四电压连接，第四电压连接适于耦合到DC电压源。 开关具有控制输入，第一触点和第二触点，第一触点耦合到直流电压源，第二触点耦合到第一电压连接和第三电压连接。 所述开关可操作以基于所述控制输入处的电压来选择性地将所述第一触点连接到所述第二触点。 脉冲宽度调制电路可操作以产生脉宽调制（PWM）信号。 脉冲宽度调制电路可操作地耦合以将PWM信号提供给开关的控制输入。