1.General altitude will be not more than 1000m, cooling medium temperature will be not more than 40 centigrade, few atomy, no corrosive gas such as steam, acid gas, alkaline gas, etc. The rated voltage of these motors is 6000V, and we can supply 3000V and 10000V under the customers requirements. The permitted fluctuation of rated voltage is +5%, the rated power frequency is 50Hz, we can also provide 60Hz or special frequency motor under the request of the motor, and the rated power factor is 0.9 (leading). and we can also make motors with the clockwise direction under the requirement. The shaft extension of the motor could not accept applied radial force or axial force when the motor is connected with the grinding mill by the coaxial coupler. The exciting systems of these motors adapted thyristor-exciting installations. The motor is permitted to start in full voltage. If the electric power network of the customer is not permitted to start in full voltage, it can be stated in drop voltage, meanwhile, The fall of the starting current of the motor is in direct proportion to the terminal voltage, and the fall of the starting torque is in direct proportion to the square of the terminal voltage. There are six terminals on the lead wire of the rotor, they are leaded out separately from the lead wire nips which located at the bottom of the base by high voltage latex cable wire: U1,V1,W1,U2,V2,W2. It can be also leaded out by lead wire box under required. Pedestal bearing: oil ring bearing and compound bearing are adopted. The pedestal bearing are fixed among the soleplate which equipped with insulated pillow board, avoiding occur bearing current. 2.Configuration The ventilation type of these motors is opened natural ventilation or complete closed pipeline ventilation type. The base are welded by steel plate, the lead wire terminal is located at the bottom of the motor base. The stator core is geminated by sector plates which are punched by 0.5mm thickness low-loss silicon steel sheet, each part of the core is separated by the radial wind channel sheet, the winding is adopted molding superposition short pitch winding. The winding is class B or F insulation, temperature rise will be considered on class B to extension the life; there are reliabl