Pulse controlled inverter` half bridge controlling method for induction machine, involves controlling bridges in way of unsymmetrical or symmetrical control such that preset control exists in one bridge for phases

摘要

The method involves assigning half bridges of a pulse controlled inverter to each U, V, W phase of a three phase voltage system. Neutral voltage (Usp) corresponding to pulse-width modulation (PWM) of PWM control signals appears at a neutral point of the system. The bridges are controlled in a way of an unsymmetrical or symmetrical control such that either a 100 or a 0 percentages-control exists in one of the bridges for the phases.