Zhuzhou Csr Times Electric Co., Ltd.

Wei Xu

Gaohua Chen

Rongjun Ding

Huaguo Chen

Jianghong Li

A space vector based synchronous modulating method includes sampling a frequency f of a reference voltage vector; checking a relational table of frequencies and carrier wave ratios by the frequency f so as to obtain a carrier wave ratio N; obtaining a passing angle &#x394;&#x3b8; of the reference voltage vector by &#x394;&#x3b8;=2&#x3c0;/N; obtaining a modulating angle &#x3b8;m of the reference voltage vector by &#x3b8;m=(Nth&#x2212;1)&#xd7;&#x394;&#x3b8;, in which Nth indicates which time of sampling; obtaining a modulating ratio m according to a modulating ratio-frequency curve; accounting and synthesizing an output angle of three basic voltage vectors of the reference voltage vector according to the modulating angle &#x3b8;m and the passing angle &#x394;&#x3b8; of the reference voltage vector and the modulating ratio m; comparing a variable quantity &#x3b8;f the reference voltage vector angle &#x3b8; and the output angle of three basic voltage vectors, and outputting corresponding basic voltage vectors according to the comparing result; synthesizing an output voltage in accordance with the reference voltage vector by the basic voltage vectors.

Growing community of inventors

Hunan, China

Wei Xu