PWM RECTIFIER HAVING TARGET VOLTAGE CORRECTOR BY ZERO SYSTEM VOLTAGE FOR REDUCING SWITCHING LOSSES AND PREVENTING NOISE GENERATION

The invention relates to a pulse-width modulated rectifier for reducing switching losses while avoiding noise generation, a target voltage system (UR.SoII.US.SoII. UT.SoII) being formed from a voltage spatial vector (IUI, arg(U)) and a zero voltage system ( Uo, Uo, Uo) being formed therefrom by means of the angle arg (U) and a control angle φ. The voltage system (UR, US,UT) resulting from the sum of the zero voltage system (Uo, Uo, Uo) and target voltage system (UR.SoII US.Soll, UT.SoII) is fed into a pulse width modulator 2 to form the control signals (SR, SS, ST) for the power semiconductor switch. First angular regions, for which a maximum zero voltage system (UO.MAX. UO.MAX. UO.MAX) is summed, and second angular regions, for which a minimum zero voltage system (UO.MIN. UO. MIN. UO.MIN) is summed, alternate over time at a frequency high enough that a first angular region in which the voltage values of a first phase of the resulting voltage system reach their maximum value is followed by a second angular region in which the voltage values of a second phase of the resulting voltage system reach their minimum value, and whereupon a first angle range follows in turn.