A loose wire winding motor

Abstract

The invention discloses a loose-wire winding motor, which belongs to the technical field of motors. When two stator coils are connected in series, transposition is performed according to the inductance of parallel-wound conductors, so that the difference in inductance among M series conductors obtained in series is the smallest; At the end where the outgoing terminal is located, a terminal board is also fixed. The terminal board is located between the stator and the end cover and is in close contact with the end of the stator coil; the terminal board includes a fixed ring and a plurality of Junction box, the junction box is provided with a circumferential opening of the junction slot, and the wiring copper bar is arranged in the junction slot; the wiring copper bar is placed in a ladder shape along the axial direction; the circumferential outer surface of the junction box is provided with cooling ribs; the stator coil The M parallel-wound conductors in the stator coil are arranged in such an arrangement that the layers of the parallel-wound conductors in the stator coil are least layered along the slot depth direction; the stator notch is provided with a larger arched slot wedge. The invention can effectively reduce the circulating current between the parallel conductors in the loose wire winding motor, and suppress the AC copper loss.

Description

technical field [0001] The invention belongs to the technical field of motors, and more specifically relates to a loose-wire winding motor. Background technique [0002] Due to its advantages in efficiency, power density and high reliability, permanent magnet motors are being widely used in new energy-related industries to promote a new round of electrification. The loose-wire winding motor is to embed one or more parallel-wound wires in the stator slot of the permanent magnet motor along the radial direction, and form a multi-turn structure around the stator teeth to serve as the motor coil for energy exchange with the rotor magnetic field. Medium, because of its simple and reliable processing technology and low manufacturing cost, is widely used in the field of motors, especially commercial motors. [0003] The traditional off-line process applied to loose-wire winding motors has a strong randomness, ignoring the shaping and layout of the conductor arrangement, making the...

AI Technical Summary

Problems solved by technology

[0004] However, since the wires of the loose-wire motor are messy in the off-line, it is difficult to guarantee a significant effect by using the method of twisting the end 180 degrees. Therefore, this transposition method applied to high-power flat-wire motors is used in loose-wire motors. Rarely, when applied to loose-wire motors, it cannot achieve a good effect of suppressing AC copper loss

Images