High frequency ballast transformer

Details High frequency ballast transformer High frequency ballast transformer

1978-03-09

1980-02-05

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Transformer in the supply circuit

315219, 315282, 336165, H05B 4126

Patent

active

041874501

ABSTRACT:
A transformer particularly useful in conjunction with solid state high frequency push-pull inverter supplies for discharge lamps is disclosed. In accordance with one embodiment of the present invention, two E-shaped core sections are disposed adjacent to one another in a mirror image fashion with corresponding core legs aligned but with an air gap provided between the middle legs of the core structure. The transformer disclosed permits the use of non-bifilar winding methods in the manufacture of transformers particularly useful in square-wave push-pull inverters used in discharge lamp ballasting circuits. In addition, the core structure disclosed provides for an integral ballasting reactance which minimizes power loss induced in the surrounding metal casing or other nearby metal structures.

REFERENCES:
patent: 2949565 (1960-08-01), Rohloff et al.
patent: 3005130 (1961-10-01), Schwartz
patent: 3078429 (1963-02-01), Wiesner
patent: 3703677 (1972-11-01), Farrow
patent: 3781638 (1973-12-01), Anderson et al.
patent: 3949268 (1976-04-01), Von Mangoldt
patent: 3956684 (1976-05-01), Walden
patent: 3983449 (1976-09-01), Dear et al.
patent: 4080725 (1978-03-01), Cronk
patent: 4088942 (1978-05-01), Miko

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