218results about "Spark gap circuits" patented technology

The invention discloses a method for actuating a spark plug (1) in an international combustion engine, wherein the spark plug (1) is assigned a first ignition coil (42) and second ignition coil (43). Triggered by a start signal (24), the primary winding (6) of the first ignition coil (42) is charged, and the primary winding (7) of the second ignition coil (43) is charged with a delay D, for which 0<=D, by supplying a direct current, wherein, whilst each primary winding (6, 7) , is charged, the respective secondary winding (4, 5) is blocked; the primary current supplied to the primary windings (6, 7) is measured; after a period T, the primary winding (6) of the first ignition coil (42) is discharged, and with the delay D the primary winding (7) of the second ignition coil (43) is discharged; the secondary current flowing through the spark plug (1) is measured; thereafter the primary windings (6, 7) of the first and second ignition coil (42, 43) start to be charged alternately when the secondary current falls below a threshold; the primary windings (6, 7) are discharged alternately when the primary current reaches an upper threshold; the above steps are repeated until the duration of discharge between two electrodes (1a, 1b) of the spark plug (1) reaches a predefined value Z.

A method is disclosed for producing a corona discharge for igniting an air/fuel mixture in an internal combustion engine. An igniter is provided having a discharge tip that protrudes into a combustion zone. During a first stage of a combustion process, a first primary winding of a RF transformer is driven at a first predetermined voltage level and at a first resonant frequency that is based on a first impedance in the combustion zone prior to onset of combustion, for generating a corona discharge at the tip of the igniter. During a second stage subsequent to the first stage, a second primary winding of the RF transformer is driven at a second predetermined voltage level and at a second resonant frequency that is based on a second impedance in the combustion zone at a time that is subsequent to onset of the combustion process.

A phase of the pulse control signal upon restarting is synchronized with the phase of the pulse control signal upon suspending, thereby suppressing fluctuations of output voltage in each phase of the inverter upon restarting and further suppressing fluctuations of voltage supplied to the load. Upon supplying DC power to a plasma generator, when arc discharge occurs in the plasma generator, supplying of the DC power is suspended to reduce damage on the electrodes and substrate, and further upon extinguishing of the arc discharge, supplying of the DC power is restarted. In suspending and resuming the DC output, the current flowing in the chopper upon suspending is held in the form of circulating current, and upon restarting the inverter, this circulating current is supplied to the load. Accordingly, it is possible to reduce a delay in supplying the DC power to the load, upon resuming the DC output.

The invention relates to an electronic pulse ignition induction circuit for civil and commercial fuel heat type gas appliances, in particular to a single-needle electronic pulse ignition induction circuit. The single-needle electronic pulse ignition induction circuit comprises a stored energy trigger ignition circuit and a flame ion detection circuit, wherein the stored energy trigger ignition circuit comprises a transformer and an ignition coil; one end of the flame ion detection circuit is connected with a secondary first end of the transformer and the other end of the flame ion detection circuit is connected with a secondary second end of the ignition coil; and a probe is connected with a secondary first end of the ignition coil. The single-needle electronic pulse ignition induction circuit also comprises a function switching circuit which comprises the first controlled silicon which is connected between the secondary second end of the ignition coil and the ground. The single-needle electronic pulse ignition induction circuit has the advantages of simple structure, long service life, accurate trigger and low production cost.

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 control circuit for a semiconductor switching element includes a control terminal, a main electrode terminal, and a current sensing terminal, and controls the semiconductor switching element including a diode connected to the main electrode terminal or the current sensing terminal. The control circuit includes an overheat detection circuit, a current detection circuit, and an interruption circuit. The overheat detection circuit outputs an overheat detection signal when a temperature detected based on an output of the diode is equal to or higher than a predetermined set temperature. The current detection circuit outputs a current detection signal when an output value of the current sensing terminal is equal to or greater than a predetermined set current value. The interruption circuit turns off the semiconductor switching element when both the overheat detection signal from the overheat detection circuit and the current detection signal from the current detection circuit are input.

The invention discloses a cable transmission and multi-module current collection strong pulse current device. The device is composed of dozens of low-inductance capacitor/discharge switch/capacitor modules in parallel, hundreds of low-resistance high-voltage coaxial cables are connected to a cable transition turning-connection component in parallel in a transmission mode, and the transmission cables become dozens of ceramic high-voltage cable connecting parts through the cable transition turning-connection component in a transition mode, and therefore energy of the device enters a vacuum experiment target chamber in a transmission mode. Due to different loads, strong pulse currents can be generated, wherein the amplitude value of the currents is 2 MA-3 MA, and the rise time of the currents is 600 ns-800 ns; a strong X-ray radiation source can be generated by metal wire electrical explosion, or nanometer particle materials of metal wire electrical explosion can be prepared, or dynamics behavior research can be performed on plane solenoid drive oblique wave loading materials.

The invention discloses a multi-spot spark triggering surge protector, which comprises a multi-spot spark triggering circuit, a main circuit, a built-in arc extinguishing system and a pressure resistance module, wherein an igniting unit group of the multi-spot triggering circuit, an electrode of the main circuit and an arc-extinguishing chamber of the built-in arc extinguishing system are positioned in the same inner space which is limited by an insulating casing. The technical proposal of the multi-spot spark triggering surge protector can realize the possibility that the large negotiability is combined with the high continued flow breaking capacity when distinctively reduces voltage protecting level simultaneously.

A system for detecting spark in an igniter for a gas turbine engine. An igniter generates a plasma, or spark, somewhat similar to an automotive spark plug. In the invention, an inductive pick-up is positioned adjacent the igniter, to detect current pulses in the igniter, to thereby infer the presence of spark. A detection system detects the spark, and informs the pilot of the aircraft of the detected spark. Thus, if the pilot encounters a problem in starting the engine, the pilot can rapidly determine whether the igniter is involved in the problem.

The invention discloses a trigger type sparkgap which comprises a gap triggering system, a self-discharge type main gap G1, a self-discharge type main gap G2, a voltage-dividing capacitor Cf and a voltage sharing capacitor. The self-discharge type main gap G1 and the self-discharge type main gap G2 are connected in series and form a main gap branch, the main gap branch is connected with a low-voltage end and a high-voltage end of a power grid respectively, the voltage-dividing capacitor Cf and the voltage sharing capacitor are connected in series and then are connected with the main gap branch in parallel, and the gap triggering system is in parallel connection with the self-discharge type main gap which is connected to the low-voltage end of the main gap branch. The gap triggering system comprises a trigger control (TC) box, and the TC box is powered by getting energy form a circuit through a current transformer (NCT) and communicates with the outside world through optical fiber (FP). The control method of the trigger type sparkgap is strong in practicality, and is proven in engineer. Further, the trigger type sparkgap is proven to be quite reliable in trigger discharge.

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.

The invention relates to a control device for transient continuous triggering. The device is suitable for a spark gap of a platform of a high voltage/ultra high voltage power transmission system (device), and has the prominent advantages of rapid starting, high reliability, strong capability of anti-electromagnetic interference, long service life and continuous ignition and the like. The invention well solves the problems of the error actions of the spark gap of the high voltage/ultra high voltage power transmission system (device) and anti-electromagnetic interference of a secondary device of the platform, enhances the reliability of the gap action, and solves the problem of insulator breakdown of the secondary device of the platform of the high voltage/ultra high voltage power transmission system (device).