Method 1 for judging the 6 heads of the motor windings: […]
Method 1 for judging the 6 heads of the motor windings: The 6 heads of the motor windings can be used to measure which two heads are the same winding, and the second is to measure the three heads or tails of each other. A simple measurement method: put 6 Three of the wire heads (not in the same phase) are shorted, and two of the other three heads are connected to the multimeter. The multimeter is placed in the low current position (usually the DC position). Turn the rotor. If three short-circuited If the head is the same name end, the hand will not deflect, if it is not the same name (or is wrong), the hand will deflect.
Asynchronous motor with cage rotor is simple in structure, reliable in operation, light in weight, and cheap in price, and has been widely used. Its main disadvantage is that it is difficult to adjust the speed. The rotor of the wound-type motor, like the stator, is also provided with three-phase windings and connected to the external rheostat through slip rings and brushes. Adjusting the varistor resistance can improve the starting performance of the motor and regulate the speed of the motor.
In this way, it is possible to find three ends with the same name (think they are the same head or tail). If the 6 line heads are marked with 1 ~ 6, 1, 4 are one group, 2, 5 are two groups, and 3, 6 are three groups. 1, 2, 3 are heads, 4, 5, 6 are tails. It is also possible to think that 1, 2, and 3 are 4, 5, and 6. The windings of the delta connection method only have heads and tails in the phase relationship. It is also possible for everyone to treat the heads as tails (the same is true for the Y connection).