Electric heating – Metal heating – Of cylinders
Patent
1987-12-28
1989-05-30
Wong, Peter S.
Electric heating
Metal heating
Of cylinders
363 98, 363132, 315105, H05B 668
Patent
active
048353531
ABSTRACT:
An arrangement for providing power to a cooking magnetron uses a ful wave bridge inverter circuit connected to a power transformer. The filament of the magnetron is energized by a secondary winding of the power transformer. The inverter controls the microwave output of the magnetron by duty cycle control. In order to stabilize filament power against variations due to changes in the inverter duty cycle, a saturable reactor is connected in series with the filament. The reactor has a control winding which changes the impedance of the reactor in order to compensate for variations in the power supplied by the power transformer. The control winding of the reactor may be supplied with a voltage dependent upon the magnetron current. Since the magnetron current depends on the duty cycle of the inverter, this voltage may be used to make the impedance of the reactor dependent upon the duty cycle.
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Payne Thomas R.
Reising, Jr. Flavian
Smith, deceased Peter H.
General Electric Company
Houser H. Neil
Reams Radford M.
Wong Peter S.
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