Electronic ballast incorporating a clocked switching controller

Details Electronic ballast incorporating a clocked switching controller Electronic ballast incorporating a clocked switching controller

1994-08-25

1997-07-29

Pascal, Robert

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

With power factor control device

315219, 315224, 363 37, 363134, 363 40, 323207, 323222, H05B 4129

Patent

active

056524803

ABSTRACT:
There is provided an electronic ballast for supplying a load, for example a lamp, in particular a gas discharge lamp, with an a.c. voltage (Un) the frequency of which is higher than the mains frequency. The ballast has a rectifier (GL) to be connected to the a.c. mains, an inverter connected downstream thereof, having two switches (S2, S1), which inverter generates the higher frequency a.c. voltage for the load (Z), and an electronic harmonics filter arranged between the rectifier (GL) and the inverter, in the form of a clocked switching controller. The control switch (S1) of the clocked switching controller at the same time forms one of the two switches (S1) of the inverter.

REFERENCES:
patent: 4251752 (1981-02-01), Stolz
patent: 4523131 (1985-06-01), Zansky
patent: 5049790 (1991-09-01), Herfurth et al.
patent: 5224025 (1993-06-01), Divan et al.
patent: 5359278 (1994-10-01), Notohara et al.
patent: 5371667 (1994-12-01), Nakao et al.
patent: 5406192 (1995-04-01), Vinciarelli
patent: 5434477 (1995-07-01), Crouse et al.
"Betriebsgerate und Schaltungen fur Lampen", C.H. Sturm, et al., Siemens AG, 6th Edition, 1992, pp. 127-128.
"Halbleiteschaltungstechnick", U. Stietze, et al. Springer, 9th Edition, pp. 563-570.

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