Permanent magnet rotary dynamo electric machines

Details Permanent magnet rotary dynamo electric machines Permanent magnet rotary dynamo electric machines

1988-10-11

1990-02-06

Salce, Patrick R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310190, H02K 108

Patent

active

048990744

ABSTRACT:
A rotary dynamo electric machine comprising a stator, a rotor rotatable relative to the stator and having an air gap between the rotor and the stator. The permanent magnet poles of the machine each include a two part flux shunt formed from a material of high saturation flux density, each first portion extending from the back iron, towards the air gap of the machine and being magnetically continuous with the back iron, each first portion being adjacent that end of its respective permanent magnet which is the strong tip end in use. Each shunt second portion extending from the respective shunt first portion circumferentially of the machine towards that end of the respective permanent magnet which is the weak tip end in use, and engaging the air gap face of the respective permanent magnet each second portion in that region thereof which is engaged with the respective permanent magnet being shaped such that its cross-sectional area increases substantially linearly from a minimum at its free end. Each shunt first portion having a minimum cross sectional area equal to or greater than the maximum cross sectional area of the respective second portion.

REFERENCES:
patent: 3581374 (1971-06-01), Phelon
patent: 4508988 (1985-04-01), Reiss et al.
patent: 4587449 (1986-05-01), West

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