Transformerless two phase inverter

Details Transformerless two phase inverter Transformerless two phase inverter

H - Electricity

02

M

H02M 7/5395 (2006.01) H02M 7/5387 (2006.01)

Patent

CA 2360652

A DC to two-phase AC inverter that includes a three-phase bridge circuit having three legs and a controller/driver circuit. The controller/driver circuit includes a triangular waveform generator and two sinusoidal reference waveform generators out of phase with each other, the sinusoidal waveforms generated at the desired AC output frequency, and the triangular waveform generated at a higher frequency. The controller/driver circuit is onfigured to drive one leg of the bridge circuit with a 50% duty cycle at the triangular waveform frequency and the other two legs at the triangular waveform frequency with pulse width modulated signals, the pulse widths of each signal varying with a discrete one of the sinusoidal waveforms. Each phase of two-phase AC is provided by the inverter between the leg driven at the 50% duty cycle and a discrete one of the other legs.

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