Method for precharging commutating capacitors in an invertor having interphase commutation, and a circuit arrangement for carrying out the method

摘要

In an invertor having interphase commutation and a DC intermediate circuit, precharging of the commutating capacitors (C1...C6) is carried out in two stages which comprise a charge reversal in a first oscillator circuit, and charging and recharging in a second oscillator circuit. The method permits a rapid, loss-free precharging and achieves a high commutation capability. <IMAGE>