公开(公告)号：US20060125513A1

公开(公告)日：2006-06-15

申请号：US11355708

申请日：2006-02-16

申请人： Ronan de Larminat ,  Alexander Kumia ,  Guang Liu

发明人： Ronan de Larminat ,  Alexander Kumia ,  Guang Liu

IPC分类号： G01R31/34

CPC分类号： H02P7/282 ,  H02M7/5395 ,  H02M2001/0009

摘要： A method and apparatus for measuring current by a single sensor for two motor phases driven by first and second set of switches to drive respective first and second phases of a motor under control of PWM signals. A first step 100 includes reading a duty cycle of each winding drive current. A next step configures 104, 110, 114, 116, 118 the PWM signals to provide at least one timing window wherein at least of one of the windings of the motor is being driven while the other winding is not being driven, and to provide a relative timing offset of approximately one-half cycle between the pulse width modulation signals driving a first winding and a second winding of the motor. A next step 90 includes gating the switches with the configured PWM signals. A next step 95 includes sampling the current of the at least one of the windings with a single sensor.

摘要翻译： 一种用于由单个传感器测量电流的方法和装置，用于由第一组和第二组开关驱动的两个电动机相位，以在PWM信号的控制下驱动电动机的相应的第一和第二相。 第一步骤100包括读取每个绕组驱动电流的占空比。 下一个步骤将PWM信号配置为104,110,114,116,118以提供至少一个定时窗口，其中电动机的绕组中的至少一个被驱动，而另一个绕组不被驱动，并且提供一个 在驱动第一绕组的脉冲宽度调制信号和电动机的第二绕组之间的大约半个周期的相对定时偏移。 接下来的步骤90包括用配置的PWM信号门控开关。 下一步骤95包括用单个传感器对至少一个绕组的电流进行采样。