Ground discharge current reducing device for drive control unit of e.g. electrical motor, has Y-capacitors integrally arranged in drive control unit and to form filter resonance frequency that is less than clock frequency of control unit

摘要

The device has Y-capacitors (Cy1) integrally arranged in a drive control unit, which comprises a rectifier (5). A current compensating choke (8) is arranged in an input side of the rectifier. The capacitors form a filter resonance frequency that is less than a clock frequency of the control unit. The capacitors are arranged before and/or behind the rectifier in electrical energy transmitting direction, and extend from an input connection of the rectifier to a protective conductor.