Motor single-layer winding end connection performance and characteristics

Motor single-layer winding end connection performance and characteristics

Three-phase single-layer winding end connection performance and characteristics

1, equal width (stacked)

The coils are equidistant, all coils have the same pitch, and the wire modes are easy to adjust; the coil pitch is shorter than the pole pitch (whole distance), which is more economical; the number of coils in the single-layer winding is small, the rule is time-saving, but the electrical performance is poor. .

2, concentric

The winding is a single-layer wiring with a high slot full rate; the average pitch of the coil is equidistant, the length of the winding end is large and the wire is consumed, and the magnetic leakage is large and the electrical performance is poor; The line forms a "double plane" or "three plane" winding, which makes the ruled line convenient and is suitable for two-pole motors.

3, cross type

The windings are full distance, but the average pitch of the coils is shorter, and the line is saved. The number of coils and the pitch of each group are different, which increases the difficulty of the weaving process; the slot full rate is high and the electrical performance is poor. In addition, the end connection mode can also be a concentric intersection type, that is, two coils of equal width are changed into a concentric type.

4, three-phase single-layer 4-pole 36-slot winding end connection

5, three-phase single-layer 4-pole 24-slot winding end connection

In short, the above several single-layer winding types have the advantages of high groove utilization ratio, difficulty in phase-to-phase short circuit, less number of coils, and man-hour saving, and are widely used in small motors. Among the commonly used Y series motors, single-stack windings are used for 4, 6 and 8-pole motors with q=2; single-layer cross windings are used for 2=4 pole motors with q=3; concentric windings for q=4 2-pole motor. These winding types are often seen in everyday repair work. In addition, due to the structural limitation of the single-layer winding, the winding ends are thick and difficult to shape, and the short-distance of the winding can not be improved to improve the electromagnetic performance of the winding, which is the reason for the poor performance of the motor of the single-layer winding.