Single-phase motor winding tap L-2 connection two-speed circuit

As shown in the figure, in the L-2 connection method, the speed regulating winding LD and the auxiliary winding LA are embedded in the same slot, so they are in the same phase in space. In the same slot, the speed regulating winding LD is wound on the top and the auxiliary winding LA is wound on the bottom, and their wire diameters are the same. When SA is in the "II" gear, the motor speed is the highest. This is because the voltage applied at both ends of the main winding LR is the rated value at this time; when it is in the "I" gear, LR is connected to the speed regulating winding LD, so the motor speed is Reduced.