61results about "Spark gap circuits" patented technology

An ignition system may include an igniter circuit to control the current in a coil supplied by a battery based on an input signal from an engine control unit. To prevent overheating, the igniter circuit may be configured to shut down the current in the coil when the input signal is held high for an over dwell period. The disclosed igniter circuit is configured with circuitry to automatically adjust the over dwell period used based on a condition of the battery to prevent overheating without prematurely shutting down. The automatic adjustment includes indirectly monitoring the battery condition based on a current or a voltage of a switching device coupled to the coil.

The invention relates to an ignition device (100) for a spark gap arrangement (200) comprising at least one first and one second ignition capacitor (C1, C2) for voltage division between a first and a second electrode of the spark gap arrangement, a first trigger spark gap (Tgr1) arranged in a first parallel branch to the first ignition capacitor, and a second trigger spark gap (Tgr2) arranged in a second parallel branch to the second ignition capacitor. The invention is characterized in that a first ignition resistor (P1b) is provided in the first parallel branch, wherein a first potential point (101) between the first ignition resistor and the first trigger spark gap is connected to an ignition electrode (ZE2) of the second trigger spark gap.The invention further relates to a spark gap arrangement with the ignition device, an arrangement with a high-voltage device and the spark gap arrangement for protecting the high-voltage device, and a method for igniting the spark gap arrangement.

An ignition coil assembly with internal diagnostic features that can be used to monitor and evaluate different aspects of an ignition system and provide continuous feedback. The ignition coil assembly may be a coil-on-plug type device that converts low-voltage battery power into high-voltage ignition pulses, and may include several input terminals, an ignition coil with primary and secondary windings, ignition circuitry, an output terminal, a spark plug connector, and a housing. The ignition circuitry includes an ignition operational circuit and an ignition diagnostic circuit, which in turn has a charging evaluation circuit for monitoring a charging phase, a discharging evaluation circuit for monitoring a discharging phase, and a feedback integration circuit for combining outputs into a multiplexed digital signal that can then be sent to an engine control unit (ECU) or the like over a single output terminal.

The invention provides a spark discharge device and a spark discharge accurate control method, and relates to the technical field of spark discharge. The device comprises a pair of spark electrodes, a rotary switch, a capacitor and a power supply, wherein a gap exists between working ends of the spark electrodes; the spark electrode, the rotary switch and the capacitor are connected in series to form a discharging loop, and the capacitor and the power supply are connected in series to form a charging loop; the rotary switch comprises a rotatable rotor and a toothed bar connected with the rotor; a contact is arranged in the discharge loop, and when the contact is in contact with the toothed bar, the discharge loop is conducted. According to the invention, the discharge loop is rapidly switched on and switched off through the rotary switch, various parameters of spark discharge can be accurately and stably controlled, so that the spark discharge is not influenced by the environment, such as spark breakdown voltage, discharge frequency and the like, and the spark discharge can be prevented from being converted into corona, glow or arc discharge, for example, the spark discharge can be normally generated under low air pressure.

An ignition coil assembly with internal diagnostic features that can be used to monitor and evaluate different aspects of an ignition system and provide continuous feedback. The ignition coil assembly may be a coil-on-plug type device that converts low-voltage battery power into high-voltage ignition pulses, and may include several input terminals, an ignition coil with primary and secondary windings, ignition circuitry, an output terminal, a spark plug connector, and a housing. The ignition circuitry includes an ignition operational circuit and an ignition diagnostic circuit, which in turn has a charging evaluation circuit for monitoring a charging phase, a discharging evaluation circuit for monitoring a discharging phase, and a feedback integration circuit for combining outputs into a multiplexed digital signal that can then be sent to an engine control unit (ECU) or the like over a single output terminal.

To provide an ignition coil having an improved assemblability and abrasion resistance while maintaining insertability of a joint part and suppressing shaft deviation, when installed to a bent-shaped plug hole.SOLUTION: An ignition coil includes a joint part made of a cylindrical elastic body which is bendable and deformable, with a tip end side attached to an ignition plug arranged at a plug hole having a bent part and with a base end side attached to a coil body part arranged at a base end inlet part having a large inner diameter than the bent part. The joint part has a plurality of first ribs extending along an axial line L provided on an outer peripheral surface of a body cylindrical part facing the bent part, and has a plurality of second ribs extending along the axial line provided on an outer peripheral surface of a base end cylindrical part positioned on the base end side. When viewed in a direction along the axial line, a maximum diameter of the first rib diameter represented by a diameter of a virtual circumscription circle that circumscribes with tip ends of the plurality of first ribs of the body cylindrical part is smaller than a maximum diameter of the second rib diameter represented by a diameter of a virtual circumscription circle connecting tip ends of the plurality of second ribs of the base end cylindrical part.SELECTED DRAWING: Figure 1

A driver circuit, including: a transistor including a ground side electrode, a control electrode, and a power supply side electrode for an inductive load to be connected thereto; a first resistor connected to the control electrode; a line connected to the first resistor; a second resistor provided between the line and a ground; a first diode, including a cathode connected to the line and an anode, the first diode being connected in parallel with the second resistor; and a second diode including a cathode connected to the line, and an anode for connecting to a capacitor, thereby receiving a voltage generated in the capacitor for driving the transistor.

An ignition coil includes a joint part that is formed of a tubular elastic body. The join part has a distal end mounted to an ignition plug arranged in a plug hole having a bend, and a proximal end mounted to a coil main body part arranged at a proximal-side entrance part of the plug hole which has a greater inner diameter than the bend. On an outer circumferential surface of a main tubular portion opposed to the bend, there are formed first ribs each extending along an axis of the joint part. On an outer circumferential surface of a proximal-side tubular portion, there are formed second ribs each extending along the axis of the joint part. When viewed along the axis of the joint part, a maximum value of a first rib diameter and a maximum value of a second rib diameter satisfy the relationship of d2 > d1.

An ignition coil system includes an ignition coil including a first primary coil, a second primary coil, and a secondary coil, and configured to generate a discharge current by electromagnetic induction with the first primary coil or the second primary coil, a first battery electrically connected to the first primary coil, a second battery electrically connected to the second primary coil, a first battery switch provided between the first primary coil and the first battery, and configured to block electrical power supplied from the first battery to the first primary coil, a second battery switch provided between the second primary coil and the second battery, and configured to block electrical power supplied from the second battery to the second primary coil, a first switch configured to adjust charging and discharging of the first primary coil, and a second switch configured to adjust charging and discharging of the second primary coil.

An ignition coil assembly with internal diagnostic features that can be used to monitor and evaluate various aspects of an ignition system and provide continuous feedback. The ignition coil assembly can be a coil-on-plug type device that converts low-voltage battery current into high-voltage ignition pulses, and it can include multiple input terminals, an ignition coil with primary and secondary windings, an ignition circuit, an output terminal, a spark plug connector, and a housing.The ignition circuit includes an ignition operating circuit and an ignition diagnostic circuit, which in turn includes a charge evaluation circuit for monitoring a charging phase, a discharge evaluation circuit for monitoring a discharge phase, and a feedback integration circuit for combining outputs into a multiplexed digital signal, which can then be sent via a single output connection to an engine control unit (ECU) or the like.

A multi-spark gap for an overvoltage protector, having multiple electrodes and insulation elements arranged between the electrodes, a holding arrangement for mechanical holding and for making electrical contact with the electrodes of the multi-spark gap, wherein the holding arrangement has at least a first electrically conductive clamping element, a second electrically conductive clamping element, and a first electrically conductive connecting element, wherein the electrodes are arranged between the first clamping element and the second clamping element, wherein the first clamping element makes electrical contact with the first electrode of the multi-spark gap, and wherein the second clamping element makes electrical contact with the last electrode of the multi-spark gap, and wherein the at least first connecting element mechanically connects the first clamping element and the second clamping element to one another.

To provide a drive circuit capable of preventing malfunction of a transistor that drives a load.SOLUTION: A drive circuit includes: a transistor having a power source side electrode to which an inductive load is connected, a ground side electrode and a control electrode; a first resistor connected to the control electrode; a line connected to the first resistor; a second resistor provided between the line and a ground; a first diode that has a cathode connected to the line and an anode and is connected in parallel with the second resistor; and a second diode having a cathode connected to the line and an anode. A capacitor in which a voltage for driving the transistor is generated is connected to the anode of the second diode.SELECTED DRAWING: Figure 3

A short-circuiting device (14) comprises a triggering circuit (16), an actuating element (30), a stationary electrode (20) and a moveable electrode (22), where the actuating element (30) is moveable between a first retracted position and a first extended position and joined to the moveable electrode (22) for being moved between a corresponding second retracted position, where there is gap of a first distance between the moveable and stationary electrodes (22, 20), and a second extended position, where the gap has a second lower distance, the triggering circuit (16) being configured to trigger a current to start to flow between the electrodes (20, 22) after the actuating element (30) has been actuated to move from the first retracted position and before reaching the first extended position and the current continues to flow in the gap after a first zero crossing and at least until a second zero-crossing.

A method for delivering a spark to a machine, comprising the following: Supplying two different ignition coil charging current times over a single conductor, wherein the two different ignition coil charging current times are supplied to a first ignition coil (206) and a second ignition coil (208), and Discharge of the first ignition coil (206) and the second ignition coil (208) to a single spark plug (92).

The invention relates to an electroshock circuit that provides both muscle locking and pain / ache formation, allowing shocking to be performed without the need for a certain distance.

A triggered vacuum gap (TVG) device that has application as a closing switch for synchronized closing in distribution and transmission power systems. The TVG device controllably sustains a current arc in the device through initial current zeros created by power system transients and, thereby, prevents premature interruption of the closing operation. The TVG device includes main electrodes defining a vacuum gap therebetween and a triggering electrode providing a triggering gap between one main electrode and the triggering electrode. The TVG device also includes a triggering circuit having a high voltage impulse source that supplies a fast rising impulse voltage to the one main electrode and the triggering electrode for creation of a plasma to provide an initial breakdown of the triggering gap and a low voltage unidirectional current source that supplies current to the one main electrode and the triggering electrode once the first triggering gap breakdown has occurred.

A surge arrester comprising: - an electrically insulating base body (GK) enclosing a cavity, - a first and a second electrode (A,B) arranged at a distance ab from each other in the cavity, - a central electrode (M) having a distance am and bm to the first and second electrodes respectively, where am = bm < ab, - a trigger electrode (T) having a distance tm to the central electrode, where tm < am, bm, - a trigger circuit (TS) for generating a trigger voltage at the trigger electrode suitable for igniting a gas discharge, wherein the trigger electrode (T) has a rectangular or square area.

The invention relates to an electroshock circuit that provides both muscle locking and pain / ache formation, allowing shocking to be performed without the need for a certain distance.

A system and method for differentiating between different modes of pulsed electrical discharges via of an amplitude to time (ATC) conversion circuit is described. A bipolar ATC circuit is used to add together the positive and negative portions of an attenuated and filtered signal derived either from the voltage or current of a pulse. Alternatively, a unipolar ATC circuit may be employed. The resulting processed signal is compared against a reference voltage to generate an output signal that is active for the amount of time that the processed signal exceeds the reference voltage. Discharge mode is determined based on three factors: did a pulse occur, if a pulse occurred when did the pulse start relative to the original pulse event, and what is the duty cycle of the pulse. Subsequent pulse generated may be controlled accordingly.

To provide ignition systems and methods for sensing a voltage of a battery and adjusting the duration of an over-dwell time automatically.SOLUTION: An ignition system may include an igniter circuit to control the current in a coil supplied by a battery based on an input signal from an engine control unit. To prevent overheating, the igniter circuit may be configured to shut down the current in the coil when the input signal is held high for an over-dwell period. The disclosed igniter circuit is configured with circuitry to automatically adjust the over-dwell period used based on a condition of the battery to prevent overheating without prematurely shutting down. The automatic adjustment includes indirectly monitoring the battery condition based on a current or voltage of a switching device coupled to the coil.SELECTED DRAWING: Figure 2

The present invention relates to an electric shock circuit that can provide both muscle locking and pain / sense of pain formation such that electric shock can be performed without a specific distance.

In an ignition coil 2 according to one embodiment, a first outer iron core 36o of a first coil set 10 and a second outer iron core 50o of a second coil set 20 share a common portion 58. The direction of a magnetic flux generated in the common portion 58 upon application of a current flowing through a first primary coil 32 of the first coil set 10 is opposite to the direction of a magnetic flux generated in the common portion 58 upon application of a current flowing through a second primary coil 46 of the second coil set 20. The direction in which an induced current generated in a first secondary coil 34 through an output port 28 is the same as the direction in which an induced current generated in a second secondary coil 48 through the output port 28.

Discharge switching device (108), which includes: a comparator section (210) configured to compare an input voltage value with a reference voltage value; and a trigger section (212) configured to discharge stored energy when the input voltage value exceeds the reference voltage value, characterized by the fact that the discharge switching device (108) further comprises a temperature compensation diode (220) which is configured to reduce a change in the reference voltage value; the trigger section (212) comprises a trigger device and a discharge device; wherein the trigger device includes a trigger metal oxide semiconductor field effect transistor (MOSFET) (222) and a trigger transformer (216).

A surge arrester (10) for a DC network (12) comprises a spark gap (14) for extinguishing follow currents in the DC network (12) whose current intensity is equal to or greater than a defined current threshold, and a triggerable extinguishing aid (36) associated with the spark gap (14), which is configured to extinguish follow currents below the defined current threshold. The surge arrester (10) further comprises an evaluation module (38) for triggering the extinguishing aid (36), wherein the evaluation module (38) is configured to trigger the extinguishing aid (36) as soon as at least two tripping conditions are met, which are characteristic of the fact that the spark gap (14) alone cannot extinguish the follow current within a defined time period. A method for operating such a surge arrester is also described.

A surge protective device includes a first electrical terminal, a second electrical terminal, and an overvoltage protection circuit connected between the first electrical terminal and the second electrical terminal. The overvoltage protection circuit includes a spark gap assembly between the first electrical terminal and the second electrical terminal. The spark gap assembly includes a first spark gap (SG) electrode and a second SG electrode defining a spark gap therebetween, and a trigger circuit operative to ignite a main electric arc between the first and second SG electrodes across the spark gap. The trigger circuit includes a groove defined in the second SG electrode, and a trigger member disposed in the groove. The trigger member is operative to assist formation of a trigger arc.

A pulse phase ablation biphasic PFA generator with finite energy source and delivery mechanism is disclosed, comprising: a signal source configured to output electrode input signals; a trigger circuit configured to trigger signals; at least one electrode channel circuit including a charge transfer source circuit including a source capacitor and coupled to the signal source to receive the electrode input signals, the charge transfer source circuit being configured to charge the source capacitor to a source voltage, a switching circuit coupled to charge transfer source circuit to receive the source voltage and to the trigger circuit to receive the trigger signals, and a charge transfer load circuit including a load capacitor coupled to the switching circuit; wherein the switching circuit further includes a plurality of spark gap switches activated by the trigger signals to cause the electrode channel to apply a biphasic waveform to electrodes configured to contact tissue.

Ionizer (10) which generates ions in the vicinity of an electrode (14) by applying a voltage to the electrode (14), comprising: a first DC voltage generation circuit (20a) which is configured to generate a DC voltage with positive polarity, a second DC voltage generation circuit (20b) configured to generate a DC voltage with negative polarity, a first resistor (22a) connected to an output side of the first DC voltage generation circuit (20a), a second resistor (22b) connected to an output side of the second DC voltage generation circuit (20b), and a switching unit (24) which connects the first resistor (22a) and the second resistor (22b) to the electrode (14) of the ionizer (10), wherein the first DC voltage generation circuit (20a) is configured to continuously generate the DC voltage with positive polarity, wherein the second DC voltage generation circuit (20b) is configured to continuously generate the DC voltage with negative polarity, wherein the switching unit (24) includes a first switch (28a) which can establish a connection between the first resistor (22a) and the electrode (14), and has a second switch (28b) that can establish a connection between the second resistor (22b) and the electrode (14) and wherein the first switch (28a) and the second switch (28b) are configured to be switched on in different time bands.

A surge protective device includes a first electrical terminal, a second electrical terminal, and an overvoltage protection circuit connected between the first electrical terminal and the second electrical terminal. The overvoltage protection circuit includes a spark gap assembly between the first electrical terminal and the second electrical terminal. The spark gap assembly includes a first spark gap (SG) electrode and a second SG electrode defining a spark gap therebetween, and a trigger circuit operative to ignite a main electric arc between the first and second SG electrodes across the spark gap. The trigger circuit includes a groove defined in the second SG electrode, and a trigger member disposed in the groove. The trigger member is operative to assist formation of a trigger arc.