Controllable direct current motor having a modified characteristic

摘要

A direct-current motor is disclosed, preferably in the form of an EC motor, which has a matching arrangement in order to vary its rotation-speed/torque characteristic, having a permanently effective control circuit for controlling the motor, which control circuit is programmed such that the rotation-speed/torque characteristic is permanently varied with respect to rated operation or operation with the matching arrangement.

主权项

1. An electric motor system comprising:
a direct current motor having a rated speed/torque relationship; an electronically controllable switching arrangement that weakens an induced back-emf; and a control circuit that continuously controls said direct current motor, said control circuit permanently altering a speed/torque relationship of said direct current motor from said rated speed/torque relationship while said switching arrangement simultaneously actively controls weakening of said induced back-emf.