Method one for judging the 6 thread ends of the liming […]
Method one for judging the 6 thread ends of the liming motor winding: liming the 6 thread ends of the motor winding, you can use a multimeter to measure which two heads are the same winding, and secondly, measure the head or the tail of the three sets of each other, and say a simple measurement method: Short-circuit three of the six (not of the same phase), and connect any two of the other three to the multimeter. The multimeter is placed in the low current position (usually the DC position), and the rotor is rotated. If the shorted end is the end with the same name, the needle will not deflect, and if it is not the end with the same name (that is, if it is mistaken), the needle will deflect.
The asynchronous motor with cage rotor of liming motor has simple structure, reliable operation, light weight and low price, and has been widely used. Its main disadvantage is the difficulty of speed regulation. Like the stator, the rotor of the wound liming motor is also equipped with three-phase windings and connected to an external varistor through slip rings and brushes. Adjusting the resistance of the rheostat can improve the starting performance of the motor and adjust the speed of the motor.
In this way, you can find three ends with the same name (thinking that they are the same head or tail). If the 6 thread ends are marked with 1~6, 1, 4 is a group, 2, 5 is a second group, and 3 and 6 are a third group. 1, 2, 3 are the head, 4, 5, and 6 are the tail. It is also possible to consider 1, 2, and 3 as 4, 5, and 6. The winding of the delta connection method only has a head and a tail in the interphase relationship. It is also possible to treat the head as the tail together (the same is true for the Y-shaped connection).