Inverter circuit, power converter circuit, and electric vehicle

摘要

An object is to reduce, with the control circuit of the full-bridge inverter circuit, distortions in an output signal of the inverter circuit resulting from an error in control of the switching of the high-side transistors and low-side transistors included in the first half-bridge circuit and the second half-bridge circuit. The pulse width of a signal that controls ON/OFF of the high-side transistors and low-side transistors included in the first half-bridge circuit and the second half-bridge circuit is reduced, i.e., the duty cycle of the signal is reduced. This results in a reduction in short-circuit periods during which both the high-side transistor and the low-side transistor are on, thereby reducing distortions in a signal.

主权项

1. An inverter circuit comprising:
a full-bridge circuit comprising:
a first half-bridge circuit; anda second half-bridge circuit; and a pulse width modulation circuit comprising:
a sine wave signal generator circuit configured to generate a sine wave;a first circuit configured to control the first half-bridge circuit in accordance with a first signal generated in accordance with the sine wave, a first sawtooth wave, and a first digital signal, the first circuit comprising:
a first digital sawtooth wave signal generator circuit configured to generate the first digital signal,wherein the first sawtooth wave is a signal produced by converting the first digital signal into an analog signal; anda second circuit configured to control the second half-bridge circuit in accordance with a second signal generated in accordance with the sine wave, a second sawtooth wave, and a second digital signal, the second circuit comprising:
a second digital sawtooth wave signal generator circuit configured to generate the second digital signal,wherein the second sawtooth wave is a signal produced by converting the second digital signal into an analog signal,wherein the second sawtooth wave is out of phase with the first sawtooth wave.