Power conversion apparatus and controlling method thereof

摘要

A power conversion apparatus and a controlling method thereof are disclosed. The power conversion apparatus is applied with a power generation apparatus, which outputs a first signal. The power conversion apparatus includes a conversion-sensing circuit, a control signal generating circuit and a switching circuit. The conversion-sensing circuit converts the first signal into a second signal, and senses at least a voltage waveform change of the second signal to generate a time interval. The control signal generating circuit is electrically connected with the conversion-sensing circuit and outputs a control signal according to the time interval. The switching circuit is electrically connected with the power generation apparatus and the control signal generating circuit, and has a plurality switching elements. The switching circuit receives the first signal and conducts one of the switching elements according to the control signal so as to convert the first signal and output an output signal.

主权项

1. A power conversion apparatus applied with a power generation apparatus outputting a first signal, the power conversion apparatus comprising:
a conversion-sensing circuit converting the first signal into a second signal and sensing at least one voltage waveform change of the second signal to generate a time interval; a control signal generating circuit, which is electrically connected with the conversion-sensing circuit and outputs a control signal according to the time interval; and a switching circuit, which is electrically connected with the power generation apparatus and the control signal generating circuit, and has a plurality of switching elements, wherein the switching circuit receives the first signal and turns on only one of the switching elements in a duration according to the control signal so as to convert the first signal and output an output signal, wherein the time interval is equal to one third of a time difference between a rising edge and a falling edge of a voltage waveform of the second signal, or the time interval is equal to a time difference between a rising edge of one of the voltage waveforms of the second signal and a falling edge of the other of the voltage waveforms of the second signal, wherein the control signal generating circuit controls the switching circuit by way of space vector pulse width modulation.