Two-in-one permanent magnet brushless electomotor with internal rotor

Abstract

The invented motor includes the rotor, the stator, the starting-up coil, the coil for generating electricity, the external control circuit and the drive circuit. The rotor is installed on the crankshaft. The stator core is installed outside the rotor. There are the starting-up coil CD, CE, CF and the coil A, B for generating electricity as well as the external control circuit and the drive circuit on the stator core. The outer cover of the stator core and the frame shell are utilized to connect to the engine. The firing pulse sensor U0 is installed on the outer end surface of the frame shell. Correspondingly, the convex piece for correct firing is installed on the rotor. Three hall sensors with 120 degrees interval are installed on the inner end surface of the frame shell.

Description

technical field [0001] The invention belongs to the technical field of starters and generators, and in particular relates to an inner rotor brushless two-in-one permanent magnet motor used on motorcycles. technical background [0002] At present, the starter magneto used on motorcycles is all started by a carbon brush-commutator, which has the disadvantages of high noise, electromagnetic interference, commutation sparks, and serious wear of carbon brushes. Chinese patent 00242041.4 discloses a "brushesless starter magneto for motorcycles". Although it can overcome the shortcomings brought by brushes and commutators, it also has some shortcomings: mainly adopts the structure of outer rotor and inner stator, and the turns of coil winding The number is affected by the space and cannot be designed arbitrarily. There is a large starting current, a small torque, and a stalling phenomenon when starting. Therefore, models with high power compression ratio need to be equipped with a...

AI Technical Summary

Problems solved by technology

[0002] At present, the starting magneto used on motorcycles is all started by carbon brushes and commutators, which have disadvantages such as high noise, electromagnetic interference, commutation sparks, and serious wear of carbon brushes.

Chinese patent 00242041.4 discloses a "brushesless starter magneto for motorcycles". Although it can overcome the shortcomings brought by brushes and commutators, it also has some shortcomings: mainly adopts the structure of outer rotor and inner stator, and the turns of coil winding The number is affected by the space and cannot be designed arbitrarily. There is a large starting current and small torque, and there is a phenomenon of stalling when starting.

Therefore, models with high power compression ratio need to be equipped with a decompression system, which has a complicated structure.

In addition, its rotor adopts a conventional structure, and the formed magnetic field is not uniform, which affects the external mechanical characteristics of the motor.

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