Apparatus for testing permanent magnets using electro-magnets an

Details Apparatus for testing permanent magnets using electro-magnets an Apparatus for testing permanent magnets using electro-magnets an

1978-09-01

1981-05-26

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Permanent magnet testing

322DIG5, 322 99, 338 32H, 73DIG3, 324228, 324243, 324261, G01R 3312, G01N 2774

Patent

active

042700876

ABSTRACT:
Apparatus for testing permanent magnets such as in a generator or alternator embodied in a fly wheel. The apparatus includes a testing head on which the fly wheel is placed for the purpose. The fly wheel has a circular series of permanent magnets, and the head has a corresponding circular series of electro magnets, with Hall Generators between the electro-magnets, the Hall Generators having an element (bismuth) the resistence of which is affected by a magnetic field. The apparatus includes an electrical circuit embodying the Hall Generators, and the electro-magnets are charged, and the voltage set up through the Hall Generators indicates the voltage condition of the permanent magnets and is the voltage which is tested by the apparatus. The apparatus can also be used for motors as well as generators and alternators.

REFERENCES:
patent: 3235776 (1966-02-01), Ireband
patent: 3260932 (1966-07-01), Weiss et al.
patent: 3418452 (1968-12-01), Renner

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