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How is the motor selected to determine the speed of the motor?
Time: 2017/5/24 10:26:50
The selection of motor speed shall be based on the requirements of the drive machine and the ratio of the drive.
Motor revolutions per minute are usually 3000, 1500, 1000, 750 and 600, etc., the asynchronous motor rated speed due to the existence of slip, generally lower than the speed of 2% to 5%.
From the perspective of motor manufacturing, motor with same power if the rated speed is high, the electromagnetic torque size is small, the cost is low and light weight, and high speed motor power factor and efficiency are higher than low speed motor. If the motor can choose higher speed, then the economy is better, but if the resulting motor and the driven machine of the speed difference is too large, the drive series required installed speed reducer is more, it will increase the cost of equipment and energy loss in transmission. It is necessary to select after analysis and comparison.
Most of the motors we use are mostly 4 pole 1500r/min motors, because this rated speed motor has a wide range of adaptability, and its power factor and efficiency are also higher.