Double concentric winding and single winding can be connected in series in a single-layer winding mode, with a pair of concentric double windings as poles and a single winding as poles. Then, after two series windings are connected in parallel, three-phase six terminals can be led out by dividing the head and tail. (The winding sequence of three-phase winding and handle is conventional).

The principle of 48-slot 4-segment wiring and 36-slot 4-segment wiring of three-phase asynchronous motor is the same, both of which are 4-pole salient pole wiring. Three-phase asynchronous motor is simultaneously connected to 380V three-phase AC power supply.

Extended data:

Coil double winding method;

Because the 4-pole 36-slot adopts single-layer winding mode (4-pole winding with 6 coils, according to the span: 1-9, 2-8; 10- 17; 18-27, 19-26; 28-35 embedded), so that the two poles are not completely symmetrical, which will produce larger second and third harmonics and affect the running noise, stationarity and efficiency of the motor. If double-layer winding is adopted, it can be improved.

Four-pole 36-slot double-layer winding method, that is, each phase is changed to 12 coil (the number of turns per turn is half that of a single-layer coil and embedded in half a slot), with three coils per pole and four poles evenly distributed on the stator, and the span of each coil is 0.8 times of the pole pitch (winding span of each pole: 1-8, 2-9, 3-6544)

The double-layer winding method has the advantages of saving invalid copper wire, simple off-line, easy forming, stable operation, good sound and certain improvement of efficiency.

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