METHOD OF WIDTH-PULSE SIGNALS FORMATION FOR CONTROL OF AUTONOMOUS INVERTER Russian patent published in 2010 - IPC H02P27/08 H02M5/453 H02M7/5395 

FIELD: electric engineering.

SUBSTANCE: in method of width-pulse modulation based on comparison of one reference signal and three modulating sinusoid signals with simultaneous change of sign in modulating signals and variation of logical level of output control signals six times in a period in points that correspond to natural switching of output voltages, signal of serrated shape is used as a reference. At the same time in the first range of motor speed control frequency of reference signal is invariable. In the second range of speed control after changeover to mode of modulator saturation, specified frequency is formed to maintain permanent ratio of frequencies between reference and modulating signals.

EFFECT: improved quality of output voltage in the area of higher frequencies and coefficient of three-phase inverter power supply source utilisation, expanded range of speed control and reduction of losses in motor.

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