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US 4,358,813 AGranted
Ignition apparatus for a burner
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsMunekazu Sato, Muneo Nishimura, Taichi Harada
Life of this patent
Estimating the term…
Abstract
A compact ignition apparatus for a burner, which rectifies the commercial power source and energizes a high-voltage transformer via a transistor blocking oscillator circuit, and in which the high-voltage transformer is provided with a control circuit for controlling the output of the transformer to a constant value against any fluctuation of the input to the transformer, whereby a secure ignition is provided.
Claims8
An ignition apparatus for a burner comprising:
- a rectifying circuit connected to an ac power source;
- a blocking oscillator circuit connected to receive a rectified output from said rectifying circuit, said oscillator circuit including an oscillation transistor, and a collector winding and a base winding which are provided on the primary side of a high voltage transformer;
- and
- a control circuit including a control winding provided on the primary side of said transformer, said control circuit being connected between a base and an emitter of said oscillation transistor to control a base current thereof in response to a variation in an output voltage of said control winding caused by a variation in a collector voltage of said oscillation transistor thereby maintaining the collector voltage of said oscillation transistor substantially constant irrespective of variations in an input voltage applied to said oscillation circuit and a load applied to an output winding provided on the secondary side of said transformer, whereby a stabilized high-voltage for ignition is obtained from said output winding of said transformer.
1 more element
An ignition apparatus for a burner comprising:
- a rectifying circuit connected to an ac power source;
- a blocking oscillator circuit connected to receive a rectified output from said rectifying circuit, said blocking oscillator circuit including an oscillation transistor, and a collector winding and a base winding, which are provided on a primary side of a high-voltage transformer;
- and,
- a control circuit for detecting a fluctuation of an oscillation output voltage and for controlling the oscillation output voltage to substantially a constant oscillation voltage, said control circuit including a control winding and a control transistor having a base connected to said control winding a collector-emitter circuit of said control transistor being connected to a base of said oscillation transistor, said control winding being disposed on the primary side of said high voltge transformer and being magnetically coupled with said collector winding of said blocking oscillator circuit, such that a variation in the oscillation output voltage of said collector winding due to a fluctuation in input voltage applied to said blocking circuit or a fluctuation in load connected to an output winding provided on the secondary side of said high voltage transformer is detected by said control winding and a base current of said oscillation transistor is controlled through the collector-emitter circuit of said control transistor to produce a substantially constant oscillation output, whereby a stabilized high voltage for ignition is obtained from said output winding of said transformer.
1 more element
Dependencies are inferred from the claim text.