Three-phase asynchronous motor connector

A change, triangular connection motor y connection Normal operation by delta connection of three-phase asynchronous motor, in order to reduce power use, can take three phase electric fan motor parts windings into star after online on the power supply voltage of 380 v, about 34% of the rated power is the power of the motor. For example, the 380 v delta connection 10 KW three-phase asynchronous motor to change into a star, meet online voltage of 380 v three-phase power use, at this time the power output of the motor is about 3.4 KW. Second, the three-phase asynchronous motor single-phase asynchronous motor Y connection and delta connection of three-phase motor changes the same way. Open the three-phase asynchronous motor terminal box, between any two phase power terminal access to a capacitor. The capacitor between V1 and W1, for example, it is at this point to connect single-phase power supply between the U1 and V1 or W1 (assuming the power of connect between the U1 and V1 motor, the power supply in U1 and electric opportunity inversion between W1,) can transform the original three-phase asynchronous motor converted a single-phase asynchronous motor. This method is especially suitable for no occasion of three-phase power supply using three-phase asynchronous motor. The capacity of the capacitor C = KP obtained are available, and where C is the capacity of the capacitor, the unit is the micro method (u F); P is the power of the motor, the unit is a kilowatt (KW); K is the empirical coefficient, take 0.06 when y-connection three-phase asynchronous motor, triangle sexual connection for 0.1. 

For example, 10 kw three-phase asynchronous motor when the star connection KP = C = 0.06 x 10 = 0.6 u F; 10 kw three-phase asynchronous motor triangle connection KP = C = 0.1 x 10 u F = 1. Changed to: after instead www.dongfeng-motor.com of capacitor terminals, such as the case of U1 power cord, another power cord by V1 connector on the W1 can realize inversion, the inversion of the inversion principle of single-phase asynchronous motor with the same principle Connect power: after the change is a single-phase capacitance motor, its effective power is 70% of the original motor power, for example: 10 kw three-phase asynchronous motor connector into effective power single-phase capacitor motor is about 7 kw. Convert into single-phase capacitor start motor, its effective power is 40% of the original asynchronous motor motor power, for example: 10 kw three-phase asynchronous motor connector into effective power for 4 kw single-phase capacitor start motor. To pick up after each phase winding voltage for no more than the rated voltage of the winding. What kind of motor depends on specific convert into being dragged the power of agricultural machinery. When convert into single-phase capacitor start motor, need to add one more time relay, wiring method is: put the time delay of time relay to disconnect the instantaneous closure in series capacitor circuit, the normally closed contact of time relay coil in parallel on both ends of single-phase power supply (time relay coil of the rated voltage is the same as the power supply voltage). After connected circuit, adjust the delay time of time relay, can work normally. Its working principle is: when switched on, time relay and motor for electricity at the same time, the capacitor circuit switched on, the motor starts, when the speed reached about 80% of the rated speed (implementation) by adjusting the delay time relay time delay disconnect instantaneous closure of time relay normally closed contacts disconnect, cut off the capacitor circuit, motor function.