Motor power, rated voltage and torque are essential elements for motor performance selection. Among them, for motors with the same power, the magnitude of torque is directly related to the speed of the motor.
For motors with the same rated power, the higher the rated speed, the smaller the size, weight and cost of the motor, and the higher the efficiency of the high-speed motor. In general, it is more economical to choose a high-speed motor.
However, for the equipment being towed, the allowable rotation speed range is certain. If the motor speed is higher than the equipment speed, the direct drive method cannot be used, and the speed must be changed through the necessary deceleration facilities. The more the speed difference, the faster the speed change. Facilities may be more complex. Therefore, the speed of the matched motor should take into account both the motor body and the driven equipment.
For the operating conditions where the motor works continuously and rarely brakes or reverses, it can be compared with factors such as comprehensive equipment and facility investment and later maintenance, and different rated speeds can be selected, combined with the variable speed system for a comprehensive comparison, from the perspective of economy Consider comprehensively the performance, rationality and reliability to determine the appropriate transmission ratio and the rated speed of the motor.
For the working conditions of frequent braking and forward and reverse operation, but not long-term work (that is, a long off-work period), in addition to considering the cost of equipment and facilities, it should be based on the principle of less energy loss during the transition process. Speed ratio and the rated speed of the motor.
For the working conditions of frequent starting and braking, positive and negative rotation, and higher operating efficiency requirements, the transition time should be strictly controlled.
Post time: Mar-10-2023