Patent ID: 7821221
Filing Date: 2010-10-26
Classification: H02P

Abstract:
1. A method for activating a three-phase inverter with six switches, which are connected in pairs in series, the switch pairs being connected in parallel to the output of an intermediate circuit providing a DC voltage, characterized in that the switches modulate the DC voltage based on a clock having a predetermined clock period, respective ends of each winding of a two-phase permanent magnet motor being connected between the switches of two different switch pairs, and the activation of the switches being effected in a manner such that each winding is subjected to alternating voltages which are phase-shifted with respect to one another, wherein one switch of one of the switch pairs is kept continuously closed for greater than one clock period and for over a rotation angle of at least 25° while the other switch of the one switch pair is continuously opened, while the desired voltage course at each winding is produced by way of modulation of the two other switch pairs.