The mechanical  characteristics of the motor, start, brake, speed control and other  control performance should meet the mechanical characteristics and  production process requirements, the motor work process on the power  supply quality (such as voltage fluctuations, Xie Bo interference, etc.)  should be Permitted range;
     According  to the scheduled working system, the cooling method Kiev in the case of  the determination of the motor power, the motor temperature should be  within the limits of the range;
     According  to environmental conditions, operating conditions, installation,  transmission, selected motor structure, installation, protection, to  ensure reliable operation of the motor;
     Taking  into account a few operating costs of the investment, the entire drive  system economy, energy saving, reasonable, reliable and safe.