VERFAHREN ZUR STROMBEGRENZUNG BEI EINEM ELEKTROMOTOR, UND MOTOR ZUR DURCHFÜHRUNG EINES SOLCHEN VERFAHRENS

摘要

A method of limiting current in a DC motor acts on a full bridge circuit ( 137 ) through which the stator winding arrangement ( 102 ) of that motor is supplied with current. Upon response of the current limiter, energy supply to the stator winding arrangement ( 102 ) from the DC power network is interrupted. The stator winding arrangement is then operated substantially in short circuit via semiconductor switches of the full bridge circuit, and the decaying current flowing in that context serves substantially to continue driving the motor. When that current has reached a lower value, energy supply from the DC power network to the motor is once again activated. The effective value of the current flowing to the motor is preferably reduced when the current limiter responds. The time period during which that current flows, in the form of current blocks, is then increased in compensatory fashion.