Magnet rotor for synchronous motor

Details Magnet rotor for synchronous motor Magnet rotor for synchronous motor

1995-11-29

1998-03-31

Dougherty, Thomas M.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 42, H02K 2100, H02K 1503

Patent

active

057342164

ABSTRACT:
A magnet rotor for a synchronous motor includes a yoke formed of a magnetic material. A generally cylindrical permanent magnet is disposed around the yoke magnet and has N and S poles alternately located in the circumferential direction of the permanent magnet. An adhesive is filled in the clearance between the outer peripheral surface of the yoke and the inner peripheral surface of the permanent magnet. The adhesive is hardened at a hardening temperature, which is around a maximum temperature encountered during operation of the motor to accomplish bonding between the yoke and the permanent magnet. The clearance between the yoke and the permanent magnet has a dimension L given by the following formula:

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patent: 5201111 (1993-04-01), Prohaska
patent: 5402025 (1995-03-01), Saito et al.

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