Low voltage power supply for spark igniter and flame sense

Details Low voltage power supply for spark igniter and flame sense Low voltage power supply for spark igniter and flame sense

2011-05-17

2011-05-17

Salce, Patrick (Department: 2836)

Electricity: electrical systems and devices

Igniting systems

For electric spark ignition

C361S256000, C361S263000

Reexamination Certificate

active

07944678

ABSTRACT:
A low voltage power supply circuit for intermittent pilot and/or direct spark ignition systems utilized in gas burning appliances is provided. The circuit utilizes a single transformer and a resonant circuit to supply power to both a flame sense circuit as well as the spark generation circuit. The resonant circuit allows the use of low power sources such as batteries or self-supplied voltage systems such as thermopiles or hydro generators. Recognizing that power draw from the low power source is high during a sparking event and recharging of a sparking capacitor, the flame sensing is suspended during the sparking event and for a short recharge time thereafter.

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