2results about How to "Reduce cogging" patented technology

This utility model discloses a mover structure and a linear motor. The mover structure includes a mover yoke and multiple mover units. Each mover unit includes a mover tooth, a winding, a pole shoe, and two first permanent magnets. The pole shoe includes a main body and a side protrusion. Two mounting slots are spaced apart in the pole shoe. Each mounting slot includes a first slot segment and a second slot segment corresponding to the main body and the side protrusion, respectively. The bottom wall of the second slot segment has an opening. The two first permanent magnets are mounted in the two mounting slots. The pole shoe has a first chamfer structure at each edge on the outer side of the main body, at each edge of the mounting slot located at its opening, and at least one edge of the second slot segment located at its opening. This utility model helps to achieve thrust stability as much as possible while maintaining a relatively high thrust density.

The application provides a single-phase capacitor-operated asynchronous motor, which comprises a stator core, a rotor core and a rotor end ring, the stator core is located at the outer periphery of the rotor core, the rotor end ring is arranged at the axial end of the rotor core, the axial height of the stator core is L1, the axial height of the rotor core is L2, the axial height of the rotor end ring is H, L2>L1 is met, and C1*L2+K1*|L1-L2|≤H≤C2*L2+K2*|L1-L2| is met, wherein 0.4≤C1≤0.6, 0.5≤C2≤0.7, 0.8≤K1≤1.0 and 0.7≤K2≤1.1. According to the application, the magnetic leakage can be reduced, the starting torque can be improved, and the motor efficiency can be improved; the problems of the single-phase capacitor-operated asynchronous motor in the prior art, such as the magnetic leakage, the insufficient starting torque and the low motor efficiency, can be effectively solved.