By using the calculation formula of roughness degree,the forming process of the roughness degree of the workpiece being grinded was deduced, and the influencing factor of equilibrium variety was revealed in the process of grinding grain apices passivation and self-drive on the grinding face.

Analysis on Constant-voltage and Frequency Running of 3-phase Self-excited Induction Generator;

Combining with the concrete situation of Guangxi power grid , on the basis of confirming black start power supply and rationally dividing the region of the power grid , through the calibration calculation of self excitation , over voltage and relay protection , the paper puts forward the feasible black start scheme in Guangxi power grid.

Based on analyzing the general conditions to cause self excitation of synchronous generators, the conditions to cause self excitation under certain assumption are improved.

Transient process simulation of self-excitation for hydraulic generator in black start;

Simulation of dynamic processes for hydro-generator and turbine-generator under loss of excitation and self-excitation;

Research on Self-excitation Double Protrude Low-tension Brushless DC Starter/Generator;

On high-speed self-excitation arc suppression coil and its application;