Synchronous full-bridge oscillator
AssigneeContinental Automotive Systems US, Inc.
InventorPerry Czimmek
Life of this patent
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Abstract
An electronic high frequency induction heater driver, for a variable spray fuel injection system, uses a zero-voltage switching oscillator that utilizes a full H-bridge topology wherein the semiconductor switches are synchronized within the bridge for function. The induction heater driver, upon receipt of a turn-on signal, multiplies a supply voltage through a self-oscillating series resonance, wherein one component of the tank resonator circuit comprises an induction heater coil magnetically coupled to an appropriate loss component so that fuel inside a fuel component is heated to a desired temperature.
Claims7
A power oscillator for an electronic induction heater driver, the power oscillator comprising:
- an H-bridge circuit topology comprising high-side and low-side semiconductor switches;
- a resonant tank circuit electrically connected between legs of the H-bridge in the topological location of a conventional H-bridge load, wherein the resonant tank circuit includes at least one induction heater coil;
- at least one energy replenishment inductor electrically in series with the H-bridge;
- wherein the H-bridge switch timing is determined by a frequency of the resonant tank circuit.
Dependencies are inferred from the claim text.