Television receiver ferroresonant power supply disabling circuit

Details Television receiver ferroresonant power supply disabling circuit Television receiver ferroresonant power supply disabling circuit

1981-07-29

1983-03-22

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Power supply from deflection circuit source

358243, H01J 2970

Patent

active

043777759

ABSTRACT:
A television display system includes a ferroresonant power supply with a protection circuit for disabling normal operation of a load circuit within the television display system during a fault operating condition. An exciting current is developed from a source of alternating input voltage, controllable in frequency of operation. In response to the exciting current, a magnetic flux is generated in the magnetizable core of a saturable reactor to link a winding located on the core for developing an alternating polarity output voltage. A capacitance associated with the winding generates another magnetic flux in the magnetizable core that in conjunction with the first magnetic flux magnetically saturates a saturable core section during each cycle of the alternating polarity output voltage for regulating the output voltage by ferroresonant operation. A load circuit within the television display system is energized by the regulated alternating polarity output voltage. A fault operating condition within the television display system is detected to activate a control circuit that changes the frequency of operation of the source of alternating input voltage to a frequency that results in the disruption of normal ferroresonant power supply operation and of normal operation of the television display system load circuit.

REFERENCES:
patent: 3885201 (1975-05-01), Fernsler
patent: 4058754 (1977-11-01), Ohnishi et al.
patent: 4319167 (1982-03-01), Wendt

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