Unitary ballast structure for operating four fluorescent lamps

Details Unitary ballast structure for operating four fluorescent lamps Unitary ballast structure for operating four fluorescent lamps

H - Electricity

05

B

315/39

H05B 41/14 (2006.01) H01F 38/10 (2006.01) H05B 41/232 (2006.01)

Patent

CA 1135785

48,704 ABSTRACT OF THE DISCLOSURE Unitary ballast structure for starting and operating four fluorescent lamps comprising stacked mag- netic iron laminations and coils retained thereon to provide two separate inductor means and a transformer means for heating multiple lamp electrode coils. The magnetic structure comprises a core member having a shell- type configuration with two main legs and six coil legs which define five coil-receiving windows. Coils retained on the second and third coil legs each comprise inductor means and occupy the first, second and third windows. An electrode-coil-heating transformer means is retained on the fifth coil leg and occupies the fourth and fifth windows. Each of the laminations which comprise the magnetic structure can have the same configuration which facilitates manufacture. Magnetic coupling between the different electrical components comprising the ballast structure is minimized, while still providing a compact, unitary ballast.

375914

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