Patent ID: 9350226
Filing Date: 2016-05-24
CPC Classification: H02M

Claim Text:
1. A power control driving device comprising: a sine wave signal generating unit configured to generate a plurality of multi-phase sine waves; a control signal converting unit configured to convert each of the plurality of multi-phase sine waves into a pair of a multi-bit control signal and an inversion signal, wherein each multi-phase sine wave of the plurality of multi-phase sine waves is converted from an analog to a digital signal by a separate multi-bit sigma-delta modulator; and a three-phase inverter circuit configured to output a voltage varied by the multi-bit control signal and the inversion signal from the control signal converting unit, wherein the inverter circuit includes a plurality of pairs of switch units, each pair of switch units matching with a corresponding pair of the multi-bit control signal and the inversion signal, each pair of switch units including an upper switch unit receiving the multi-bit control signal and a lower switch unit receiving the inversion signal, wherein an on-off state of each pair of switch units is determined by the corresponding pair of the multi-bit control signal and the inversion signal from the control signal converting unit, and wherein each of the plurality of pairs of switch units includes a plurality of switch sets, each of which has switches weighted according to a binary ratio.