公开(公告)号：US20140217949A1

公开(公告)日：2014-08-07

申请号：US14168171

申请日：2014-01-30

Applicant: STMicroelectronics S.r.I.

Inventor： Paolo PASCALE ,  Federico Magni ,  Ezio Galbiati ,  Giuseppe Maiocchi ,  Michele Berto Boscolo

IPC: H02P23/00

CPC classification number: H02P23/0031 ,  H02P6/14 ,  H02P23/0004

Abstract: A method of PWM regulating a motor through a half-bridge drive stage includes sampling the motor current to obtain sampled values during driving intervals or during current decay intervals, and comparing a last sampled value with a current threshold. The motor is coupled in a slow decay electrical path for the duration of a current decay interval if the last sampled value does not exceed the current threshold. Otherwise the motor is coupled in a fast decay electrical path for a portion of the duration of the current decay interval, and is coupled in the slow decay electrical path for a remaining part of the duration of the same current decay interval.

Abstract translation: 通过半桥驱动级PWM调节电动机的方法包括：在驱动间隔期间或电流衰减间隔期间对电动机电流进行采样以获得采样值，并将最后采样值与电流阈值进行比较。 如果最后一个采样值不超过当前阈值，则电机在电流衰减间隔的持续时间内以慢衰减电路连接。 否则，电动机在电流衰减区间的持续时间的一部分中以快速衰减电路连接，并且在慢衰减电路中被耦合在相同电流衰减间隔的持续时间的剩余部分中。