Patent ID: 6690129
Filing Date: 2004-02-10
Classification: H02H,H02P,Y10S

Abstract:
An electronically commutatable motor, comprising:a plurality of excitation windings; a plurality of semiconductor output stages; a control unit for controlling the plurality of excitation windings via the plurality of semiconductor output stages in accordance with PWM control signals and for emitting the PWM control signals to the plurality of semiconductor-output stages, a setpoint value being specificable to the control unit; and a monitoring device for monitoring a speed of the electronically commutatable motor and for detecting one of a faulty movement of the electronically commutatable motor and a standstill of the electronically commutatable motor, wherein: when the electronically commutatable motor is operated by at least one of an input of the setpoint value and a switching on of at least one of the electronically commutatable motor and the plurality of semiconductor output stages, a start-up time is specificable to the monitoring device, the start-up time is a function of a magnitude of the setpoint value, after an elapsing of the start-up time, the monitoring device compares the speed of the electronically commutatable motor to a minimum speed, and the monitoring device switches off the electronically commutatable motor if the minimum speed is not reached.