Zhang Xinghua authorized invention patent.

[1] Zhang Xinghua, speed sensorless inverse controller for AC asynchronous motor, invention patent (patent number ZL200510040417.1).

[2] Dai, Liu, inverse control inverter of induction motor neural network and its construction method, invention patent (patent number: 03112857.2);

[3] Dai, Liu, and the construction method of neural network inverse compound controller for constant voltage-frequency ratio variable frequency speed regulation system, invention patent (patent number: 03112856.4);

[4] Dai, Sun Yukun, the construction method of neural network inverse synchronization controller for double variable frequency motor system, invention patent (patent number: 03131770.7);

Zhang Xinghua, Lin Jinguo, Ding Shougang, Shen Jie, Speed Sensorless Inverter for Permanent Magnet Synchronous Motor and its construction method, invention patent (patent number: ZL200810124095.2);