Patent · US Expired

Method for controlling an electric motor driving a body in translation

US6936987B2 · kind B2 · utility

6Cited by
10References
18Claims
0Family size

Assignee

Inventor

Key dates

Filing dateAug 31, 2001
Grant dateAug 30, 2005
Priority date—
Expiry dateNov 11, 2021

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG05B2219/43082
  • WIPO fieldControl
  • WIPO sectorInstruments

Abstract

The invention concerns a method for controlling an electric motor driving a body in translation between an initial position and a final position determined by a stop, by powering the motor with reduced voltage in the final position approach phase. The motor has a torque/speed characteristic such that the torque at null speed decreases with the supply voltage. As the approach phase starts, the method consists in determining a reduced voltage by decreasing the rotational speed of the motor from a nominal value to a predetermined reduced value and in cutting the motor power supply if the motor rotational speed drops below a predetermined threshold value.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.