Filament winding arrangement in ballast transformer

Details Filament winding arrangement in ballast transformer Filament winding arrangement in ballast transformer

H - Electricity

05

B

315/36

H05B 41/16 (2006.01) H05B 41/232 (2006.01)

Patent

CA 1271515

Case 2959 FILAMENT WINDING ARRANGEMENT IN BALLAST TRANSFORMER ABSTRACT OF THE DISCLOSURE A ballast apparatus for a lead type, rapid start, fluorescent lamp system is described. In the past the cathode heating windings have been wound on or associated with the primary winding and it was not considered suitable to have a cathode heating winding wound over the secondary winding because of the difficulty of achieving adequate control of the voltage during starting and running. However, by using a ballast design with suitable leakage and magnetizing fluxes and by placing a cathode heating winding on the secondary winding in the region thereof closely adjacent the primary winding, it is possible to obtain suitable voltage output. In lamp systems having three or four lamps operating from a single ballast, it is sometimes desirable to be able to place at least one of the cathode heating windings on a secondary winding.

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