Electronically commutated three-phase direct current motor, has diode connected parallel to inductor, and capacitor connected to output side with series connection of impedance and receiving ripple currents from motor

摘要

The motor (24) has a pi-filter with an input sides (56) connected to direct current (DC) voltage sources (20, 22). An inductor (32) is arranged between the input side and an output side (46). A diode (38) is connected parallel to the inductor, where current flow direction (36) of the diode corresponds to a direction of a current flowing at the output side in an operation of the source (20). A capacitor (42) is connected to the output side with a series connection of impedance (50), and receives ripple currents from the motor. The capacitor is charged by voltage of a DC intermediate circuit.