Method and apparatus for measuring core loss of a laminated ferr

Details Method and apparatus for measuring core loss of a laminated ferr Method and apparatus for measuring core loss of a laminated ferr

1983-02-14

1986-02-25

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Hysteresis or eddy current loss testing

324225, 324240, G01R 3314

Patent

active

045730121

ABSTRACT:
A core loss tester employs separate cables for excitation and pickup. Testing is performed at a fixed flux density in the ferromagnetic core. A processing circuit on the output of the pickup coil scales the voltage developed so that, when excitation current is increased so that the indicated output of the pickup coil equals the effective cross-sectional area of the flux path, the fixed predetermined value of flux density is produced. When this condition is achieved, the excitation current times the sensed flux-induced voltage provides a measurement of the core loss in watts. Excitation is accomplished with a multi-conductor cable looped once or more times through the core with the conductors in the cable connected in series by mating together of a connector at each end.

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ASTM Standards: Alternating Current Magnetic Properties of Laminated Core Specimens (A'346-64), pp. 94-121.
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ASTM Standards: Alternating Current Magnetic Properties of Materials Using Epstein Specimens (A 343-60T), pp. 29 et seq.

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