公开(公告)号：US5977734A

公开(公告)日：1999-11-02

申请号：US150129

申请日：1998-09-09

申请人： Li-Hsin David Lu ,  Chinh Dac Nguyen ,  Francis Yu

发明人： Li-Hsin David Lu ,  Chinh Dac Nguyen ,  Francis Yu

IPC分类号： H02P6/20 ,  H02P7/00 ,  H02R39/46

CPC分类号： H02P6/20

摘要： A circuit for determining an initial winding combination for motor startup of a polyphase dc motor having a transistor driver circuit comprising a plurality of high side winding drivers and low side winding drivers operably connected to first and second voltage sources comprises a current mirror circuit and a plurality of sense FETs each operably connected between one of the voltage sources and the gate of one of the winding driver transistors in each phase combination. The sense FETs are operably connected to one side of the current mirror circuit. The mirror circuit compares the current through the sense FET with a current threshold provided on the other side of the current mirror and produces an output signal when the threshold is reached. At the same time, the time to reach the threshold is measured and the phase combination having the longest time is stored. Also when the threshold is reached, the sequencer advances to the next phase combination for measurement until all phase combination have been sequenced. The motor is then started with the phase combination having the longest time measurement energized first.

摘要翻译： 一种用于确定具有晶体管驱动器电路的多相直流电动机的初始绕组组合的电路，该晶体管驱动电路包括可操作地连接到第一和第二电压源的多个高侧绕组驱动器和低侧绕组驱动器，包括电流镜电路和多个 每个相位组合中的每个可操作地连接在一个电压源和一个绕组驱动器晶体管的栅极之间的感测FET。 感测FET可操作地连接到电流镜电路的一侧。 镜像电路将通过感测FET的电流与设置在电流镜的另一侧上的电流阈值进行比较，并在达到阈值时产生输出信号。 同时，测量达到阈值的时间，并存储具有最长时间的相位组合。 此外，当达到阈值时，定序器前进到下一个相位组合进行测量，直到所有相位组合都被排序。 然后，首先通过最长时间测量的相位组合起动电动机。