Motor using a rotor including an interior permanent magnet

Details Motor using a rotor including an interior permanent magnet Motor using a rotor including an interior permanent magnet

1998-07-22

1999-12-28

Ramirez, Nestor

Electrical generator or motor structure

Dynamoelectric

Rotary

310162, 310261, 310166, H02K 2900, H02K 110

Patent

active

060085592

ABSTRACT:
In a motor having a permanent magnet built in a rotor, a hole for preventing a short-circuit of magnetic flux is disposed so that the hole is adjacent to the outer rim of rotor core, and adjoins to a slit for receiving a permanent magnet as well as the permanent magnet per se. This structure prevents a short-circuit of magnetic flux generated by both ends of the permanent magnet, and the magnetic flux at both ends of the magnet can flow to a stator, thereby contributing to generate torque effectively. As a result, the highly efficient motor with less cogging torque, less vibration and lower noise can be provided.

REFERENCES:
patent: 4486679 (1984-12-01), Jones
patent: 4954736 (1990-09-01), Kawamoto et al.
patent: 5097166 (1992-03-01), Mikulic
patent: 5159220 (1992-10-01), Kliman
patent: 5191256 (1993-03-01), Reiter et al.
patent: 5811904 (1998-09-01), Tajima et al.
patent: 5818139 (1998-10-01), Yamagiwa et al.

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