221results about "Spark gap circuits" patented technology

A corona ignition system including a corona igniter, an energy supply, and a frequency detector is provided. The energy supply provides energy to the corona igniter during corona events which are spaced from one another by idle periods, during which no energy is provided to the corona igniter. During the idle periods, the frequency detector obtains the resonant frequency of the corona igniter from at least one of an output voltage and an output current of the energy stored in the corona igniter. The resonant frequency measured during this idle period is dependent only on the corona igniter, and not any other components of the system, and thus is very accurate. The drive frequency of future corona events can then be set based on this accurately measured resonant frequency to achieve a robust corona discharge.

A high-frequency discharge ignition apparatus includes: a spark discharge path generation apparatus 101 for generating predetermined high voltage and supplying the generated predetermined high voltage to an ignition plug, thereby forming a path for spark discharge in a gap; a resonance apparatus 105 composed of an inductor 117 and a capacitor 116; a current supply apparatus 103 for supplying AC current to the path for spark discharge formed in the gap, via the resonance apparatus; a current level detection apparatus 115 for detecting the level of the AC current supplied from the current supply apparatus or a level corresponding to the level of the AC current, and outputting a value corresponding to the detected level; and a control apparatus 104 for controlling output of the AC current supplied from the current supply apparatus, in accordance with the output of the current level detection apparatus.

The present invention discloses an SF6 spark discharge device. The device comprises a charging circuit connected with the first end of a selective switch, and the second end of the selective switch is connected with one end of an energy storage capacitor; the control end of the selective switch is connected with a switch controller configured to control the conduction of the first end and the second end of the selective switch or the conduction of the second end and the third end; a discharging circuit comprises a sealed spark discharge air chamber which has a pneumatic valve and is installed at the side wall, and the discharging circuit comprises a high-voltage guide rod and a low-voltage guide rod respectively penetrating two ends of the spark discharge air chamber; one end, located at the outer portion of the spark discharge air chamber, of the high-voltage guide rod is connected with the third end of the selective switch, and the other end, located at the inner portion of the spark discharge air chamber, of the high-voltage guide rod is provided with a discharge high-voltage electrode; one end, located at the inner portion of the spark discharge air chamber, of the low-voltage guide is provided with a discharge low-voltage electrode, and there is a spark discharge gap between the two discharge electrodes; and a signal collection circuit comprises a voltage collection device, a current collection device and a waveform display. The SF6 spark discharge device can control the frequency of generating spark discharge and the energy of spark discharge each time to facilitate the subsequent SF6 spark discharge analysis.

A non-thermal equilibrium plasma ignition plug including a tubular metallic shell having an axial hole extending along an axial line, an insulator disposed in such a manner as to form a gap in cooperation with a wall surface of the axial hole at a forward end portion of the metallic shell, and a center electrode held at the center of the insulator, and generates nonequilibrium plasma in response to voltage applied thereto from a power supply. The insulator has a plurality of depressions or protrusions formed on a surface thereof which faces a discharge space therearound.