ring motor
2.Brazing technology for end-ring and conducting bar of asynchronous traction motor
5.The speed of electric transmission of ship lift is governored by the transist motor and its lifting mechanism of control system is a double closed ring regulation system of inner electric current ring and outer speed ring. It is driven by 4 DC motors with the power of 200 kW each and the total lifting capacity is 320 t.
6.By 2010, set up two technical development centers for mass assembly vehicle of national level of the Dongfeng commercial vehicles and Peugeot cars; 2-3 parts and components technical development centers of national level of the Dongfeng Motor Co., Ltd, Tri-ring Group and etc.; 20 parts and components technical development centers of provincial level of Dongfeng Industrial Co., Ltd, Tongda Company, Xiangyang Automobile Bearing Co., Ltd, Jiu Long Group, Hubei Aviation Life-support Technology Co., Ltd and etc.

