INDEPENDENT THREE-PHASE INVERTER CONTROL METHOD Russian patent published in 2015 - IPC H02M7/527 H02M7/537 H02M7/53846 H02M7/5395 H02P27/08 

FIELD: electricity.

SUBSTANCE: invention is referred to the area of electric engineering and may be used for the control of independent three-phase inverters with pulse width modulation (PWM), in particular, for the frequency control of asynchronous motor speed. An independent three-phase inverter control method using bipolar modulating and reference signals, both with a sinusoidal modulating signal and zero-sequence components introduced into the sinusoidal modulating signal, is based on the comparison of a high-frequency reference signal of a triangular or sawtooth configuration and low-frequency three-phase modulating voltage; at that amplitude modulation is performed for positive and negative half-waves of the reference voltage with positive and negative envelopes of the maximum phase modulating voltages respectively. The received reference voltage is compared to the phase modulating voltages.

EFFECT: extending the linear range for the regulation of the first output voltage harmonic of the independent three-phase inverter.

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