Electrical transformer with reduced core noise

Details Electrical transformer with reduced core noise Electrical transformer with reduced core noise

1995-07-31

1998-03-10

Berhane, Adolf

Inductor devices

With vibration control

336 90, H01F 1500

Patent

active

057266174

ABSTRACT:
An electrical transformer includes a tank containing transformer fluid and a transformer core and winding subassembly located in the transformer fluid within the tank. The electrical transformer also includes a mechanism for varying the dynamic pressure of the transformer fluid within the tank during electromagnetic operation of the transformer core and winding subassembly to cancel out (or reduce) noise-causing vibrations in the transformer fluid which come from the operating transformer core and winding subassembly. Preferably, the electrical transformer further includes an active mount subassembly.

REFERENCES:
patent: 3629757 (1971-12-01), Katayama
patent: 4318068 (1982-03-01), Hori
patent: 4390858 (1983-06-01), Schulzer
patent: 4470040 (1984-09-01), Kaminishi
patent: 4817706 (1989-04-01), Miyama et al.
"Active Noise Control Systems", by R.R. Leitch and M.O. Tokhi, IEEE Proceedings, vol. 134, Pt. A. No. 6, Jun. 1987, pp. 525, 528, and 545.

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