H - Electricity – 01 – J
Patent
H - Electricity
01
J
H01J 65/00 (2006.01) H01J 65/04 (2006.01)
Patent
CA 2103984
ELECTRODELESS FLUORESCENT LAMP SHIELD FOR REDUCTION OF ELECTROMAGNETIC INTERFERENCE AND DIELECTRIC LOSSES Abstract An electrodeless fluorescent lamp of the type having a solenoidal drive coil wound about a ferrite core includes an inner shield between the coil and the core and further includes an outer shield about the coil. The shields are preferably constructed of sheets of flexible polyimide material with vertical bands of metal etched thereon. The metal bands are connected to ground in order to shield the core and the plasma from the electric field generated about the drive coil. By thus shielding the core, the capacitance between the coil and the core is effectively short-circuited, substantially reducing or eliminating dielectric losses of the core. The outer shield substantially reduces the EMI generated by the drive coil.
Company General Electric
Craig Wilson And Company
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