HIGH FREQUENCY GENERATING DEVICE AND HIGH FREQUENCY GENERATING METHOD USED IN PLASMA IGNITION APPARATUS

摘要

A high frequency generating device used in a plasma ignition apparatus according to an embodiment includes a high frequency output unit, an output control unit, a current detecting unit, and an abnormality detecting unit. The high frequency output unit outputs a high frequency. The output control unit shifts a state of the high frequency output unit from a non-output state to an output-ready state of the high frequency. The current detecting unit detects a current that flows through a power-supply path to the high frequency output unit. The abnormality detecting unit detects output abnormality of the high frequency in the non-output state when a value of a current detected by the current detecting unit in the non-output state exceeds a non-output threshold.

主权项

1. A high frequency generating device used in a plasma ignition apparatus, the high frequency generating device comprising:
a high frequency output unit including:
an oscillation unit that oscillates a high frequency; andan amplification unit that amplifies the high frequency oscillated by the oscillation unit; an output control unit that shifts a state of the oscillation unit from an oscillation disabled state to an oscillation enabled state of the high frequency to shift a state of the high frequency output unit from a non-output state to an output-ready state of the high frequency in accordance with timing at which an ignition signal that controls a spark discharge of an ignition plug is output; a current detecting unit that is provided on a power-supply path to the high frequency output unit, the current detecting unit detecting a current that flows through the power-supply path; and an abnormality detecting unit that detects output abnormality of the high frequency based on a detection result of the current detecting unit, wherein the abnormality detecting unit detects output abnormality of the high frequency in the non-output state when a value of a current detected by the current detecting unit in the non-output state exceeds a non-output threshold that is less than or equal to a value of a current that flows through the power-supply path when the state of the oscillation unit becomes the oscillation enabled state.