Zhuzhou Csr Times Electric Co., Ltd.

Crrc Zhuzhou Electric Locomotive Research Institute Co., Ltd.

Jianghong Li

Jianghua Feng

Gaohua Chen

Lei Xiao

Rongjun Ding

Qi Lu

Wei Xu

Huaguo Chen

Xiwen Yuan

Xiaoguang Li

Jing Peng

Chenlin Zhang

Xiaocong Liu

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.

Space vector based synchronous modulating method and system

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Hunan, China

Jianghong Li