公开(公告)号：US09698721B2

公开(公告)日：2017-07-04

申请号：US14877943

申请日：2015-10-08

Applicant: RHYMEBUS CORPORATION

Inventor： Ming-Shi Huang ,  Chang-Ming Wang ,  Kuan-Cheng Chen ,  Ming-Chang Chou

IPC: H02P1/00 ,  H02P27/08

CPC classification number: H02P27/08 ,  H02M1/4216 ,  H02M3/1582 ,  H02P23/26 ,  H02P29/50 ,  H02P2201/07 ,  H02P2201/15 ,  Y02B70/126 ,  Y02P80/116

Abstract: AC motor driving system and driving method thereof are provided. The driving system and method are capable of increasing power factor, adjusting waveform of the DC ripple voltage for increasing driving efficiency. The driving system is basically constructed by connecting three circuits. The first circuit is a three-phase full wave rectifying circuit and is used to transfer commercial electricity to a first DC voltage. Then, the second circuit is used to transfer the first DC voltage to a second DC voltage that ripples voltage thereof having a semi-sinusoidal waveform. The third circuit is an AC driving circuit, and receives the second AC voltage for driving the AC motor. Thereby, the driving efficiency can be increased. The capacitance used in the present disclosure has low capacitance value, thus the power factor can be increased, and usage time of the AC motor driving apparatus can also be increased.