Electronically commutated electric motor has bridge circuit with switching element switchable by voltage lower than voltage to be switched generated from pulsed DC and AC voltages by auxiliary stage

摘要

The motor is supplied from an alternating voltage source and has a stator with at least one winding phase (L1), a rotor that interacts magnetically with the stator, a rectifier that produces a direct voltage between positive (30) and negative (32) lines of an intermediate rectifier circuit from the alternating source voltage, a bridge circuit with a switching element switchable by a control voltage lower than the voltage to be switched and generated by an auxiliary stage (34) from the pulsed DC voltage (UB) and the AC voltage.