金属切削机床的电动机功率是根据机床的最大切削量来选定的,然而,在实际使用中,机床电机却常常处于轻载状态,电机功率因数低,无功功率损耗大,浪费电力。如果将电机原来的△接线换为丫接线,那么,电机在轻载时的功率因数便会提高,电能的损耗就能减少。但是,当电机处于重载情况时,又必须换成△接线,以保证机床加工的实际需要。而且,电机的△和 Metal cutting machine motor power is based on the maximum amount of cutting machine to select, however, in actual use, the machine is often in light-load motor state, the motor power factor is low, reactive power loss, waste of electricity. If the original △ motor wiring replaced Ah connection, then the motor at light load power factor will increase, the power loss can be reduced. However, when the motor is under heavy load, it must be replaced by △ wiring to ensure the actual machining needs. And, the motor △ and