公开(公告)号：EP1389817A1

公开(公告)日：2004-02-18

申请号：EP02425488.0

申请日：2002-07-26

Applicant: STMicroelectronics S.r.l.

Inventor： Letor, Romeo ,  Di Caro, Giuseppe

IPC: H02H7/085

CPC classification number: H02H7/0851

Abstract: A method for detecting variations of the torque of a DC motor particularly suited for detecting an accidentally block of the motor, comprises the operations of generating a first signal representing the current flowing in the motor, multiplying the first signal with a pre-established function producing a product signal, generating a comparison signal to correspond to the slope of the product signal and signaling a torque variation if the comparison signal surpasses a certain threshold.
The method is implemented by a control circuit for detecting a torque variation of an electric DC motor, comprising sensing means of the current flowing in the motor, generating a first signal, first circuit means for generating a product signal of the first signal by a pre-established function, second circuit means for generating a comparison signal to correspond to the slope of the product signal, a comparator of the comparison signal with a certain threshold, signaling a torque variation when the comparison signal surpasses the threshold.

Abstract translation: 一种用于检测DC电动机的转矩的变化特别适用于探测到意外阻挡了发动机的方法，包括产生一个表示当前在电动机中流动的第一信号，具有预先建立的函数产乘以所述第一信号的操作 乘积信号，产生一个比较信号，以对应于乘积信号的斜率和信令的转矩变动，如果比较信号超过某一阈值。 的方法，由控制电路，用于检测电动DC电机的转矩变动来实现，包括在所述电动机中流过的电流的感测装置，产生第一信号，第一电路装置，用于产生第一乘积信号 通过预先建立的函数信号，第二电路装置，用于当所述比较信号超过所述阈值产生比较信号，以对应于积信号，具有一定的阈值的比较信号的比较器的斜率，信令转矩变化。