The rare earth permanent magnet synchronous motor(REPMSM) is adopting the material of rare earth permanent magnet instead of electrical excitation of the ultra-efficient motor, with the traits of small loss, high efficiency, low temperature, and large torque, has a significant energy-saving effect. The motor is widely used in chemical fiber textile industry, oil pumps and other industries.

Type BYT132M-4 twisting machine is dedicated with rare earth permanent magnet synchronous motor and the efficiency above 94%, the motor can maintain a higher power factor in the range if rated loading from 25% to 120%, and it makes the motor to achieve significant energy-saving effect under various loading conditions.

Compared with common three phase asynchronous, the rare earth permanent magnet synchronous motor with small resistive losses, therefore, the total loss is greatly reduced, and also reduced the temperature rising of the motor. Measured by the scene, under the same conditions, the working temperature of the rare earth permanent magnet motor is 15 ℃ ~ 20 ℃ lower than the asynchronous motor, so If the workshop is all transformed to using rare earth permanent magnet motor, the temperature inside the workshop will be significantly reduced, it is good for improving the working environment of workshop in summer and also can saving electricity for air-conditioning.

The rare earth permanent magnet synchronous motor is belonging to synchronous motor, regardless of load size, stable operation at 1500 r/ min when normal working.While three-phase asynchronous motor has slip, under different loading, rotating speed from 1440-1485, the greater load, the lower speed. And the yield of twisting machine is directly depending on rotating speed of the motor. So the yield of twisting machine that used the rare earth permanent magnet synchronous motor is 1%-4% higher than that used asynchronous motor, the greater load, the greater yield.

The rare earth permanent magnet synchronous motor does not require reactive excitation current, therefore the power factor is almost 1 (Even capacitive), so factory's grid can reduce the capacitor reactive power compensation. After using large quantities of rare earth permanent magnet synchronous motor, the power factor of the entire plant will be increased substantially, and reactive power is greatly reduced, it can reduce or even cancel capacitor reactive power compensation. At the same time, because the reactive excitation current for rare earth permanent magnet synchronous motor is local compensation, it makes power factor of the plant is more stable, and very favorable for the normal operation of other equipment, and also reduce the reactive power loss of the cable plant, play the effect of energy saving.

The rare earth permanent magnet synchronous motor does not require reactive excitation current, so the stator current will greatly reduce. The measured data show that: the current for there-phase rare earth permanent magnet motor is decreased by about 40% than the three-phase asynchronous motor, it is equivalent to expanding the capacity of the cable, so you can acquire more twisting machines rather than to replace the cable. Meanwhile, cable current reduce significantly also reduces the loss of cable transmission, so as to achieve a comprehensive energy conservation

For energy-saving, 310G twisting machine can adopting two sets 7.5KW BYT132M-4 type three-phase rare earth permanent magnet synchronous motor instead of the original asynchronous motor, easily to achieve energy-saving transformation and upgrading. Under the current electric charge, it can recover the cost of investment in upgrading in two years, and in the period of the entire using life of the motor, the transformation investment for each motor can up to RMB3000.