16results about How to "Inhibit current" patented technology

The present invention discloses an insulating suspension device for cables, comprising a fixed pole, the outer surface of which is fixedly connected to a mounting support by bolts, a plurality of suspension components are slidably installed on the top of the mounting support, both ends of the top of the suspension component are fixedly connected to fastening components, a cable body is clamped and installed inside the fastening component, in the above scheme, a plurality of cable bodies are separated from each other, which is convenient for later maintenance and sorting, and the wind force is resisted by the reaction of the return springs on both sides, the shaking of the cable body is reduced, the cable body is locked, the installation is simple and convenient, and there is no need to fix it by separately placing bolts and nuts, which is more suitable for installation personnel who climb high, the cable body is tightened, and the cable body is prevented from sagging due to low slack of the cable body, and the influence of natural environment such as wind on the cable body is reduced, so that the part in contact with the cable body by the suspension device is insulated, the current generated by the suspension device is avoided, and the safety of the overall device is improved.

The utility model discloses a fixing and sealing device for a cable connector of a photovoltaic power station, and relates to the technical field of cable junction boxes of photovoltaic power stations. Comprising a wiring opening box, a connecting assembly and a sealing assembly, the sealing assembly is installed at an opening in the top of the wiring opening box, the connecting assembly is installed in the wiring opening box, the connecting assembly comprises a wiring box wire harness assembly, and the wiring box wire harness assembly is installed in the center of the interior of the wiring opening box. The two ends of the junction box wire harness assembly are respectively provided with a transformer box, the two transformer boxes are electrically connected with the junction box wire harness assembly, and the exteriors of the two transformer boxes are respectively provided with transmission wire harnesses penetrating through the two sides of the exterior of the wiring opening box. According to the utility model, the transmission belt which enables the cables at the two ends not to pass through the wiring harness assembly of the junction box is arranged in the junction box, so that when the photovoltaic cable is electrified and maintained, current attached outside the sealing device can be avoided, and the potential safety hazard during actual maintenance is reduced.

The utility model discloses a surge current suppression circuit suitable for high-voltage input, which belongs to the technical field of power electronics and comprises an MOS (metal oxide semiconductor) tube, a triode, a first capacitor and a second capacitor. A collector electrode of the triode is connected to a power supply positive electrode line through a resistor, an emitter electrode of the triode is connected to a power supply negative electrode line, a base electrode of the triode is divided into two paths, one path of the base electrode of the triode is connected with a source electrode of the MOS tube through a sixth resistor, and the other path of the base electrode of the triode is connected with a drain electrode of the MOS tube through a fourth resistor; one end of the first capacitor is connected between the second resistor and the first resistor, and the other end of the first capacitor is connected to the power supply cathode line; and the MOS tube is connected to a power supply cathode line. Compared with the prior art, the circuit does not need an auxiliary power supply and an operational amplifier circuit, so that the cost and the arrangement space are saved, the related requirements of GJB181A-2003 on the input current are met, and the power supply and front-end equipment can be protected.

The utility model relates to the technical field of power distribution switch control equipment, and solves the problems that live-line equipment is arranged in a cabinet body, static electricity is generated when a cabinet door 2 is opened, the cabinet door 2 is lack of a discharge structure, current is conducted to the cabinet door 2, and workers get an electric shock when opening the cabinet door 2. The power distribution switch control equipment comprises a power distribution switch control cabinet, the surface of the power distribution switch control cabinet is provided with a cabinet door, the surface of the cabinet door is provided with a square groove, the square groove is internally provided with a protection assembly used for avoiding electric shock caused by a switch cabinet door, and the protection assembly comprises a line bank arranged in the square groove. A plurality of threaded nails used for connecting and fixing cables are arranged on the surface of the connector bar in a rectangular array mode, a first connecting line is arranged on the surface of one threaded nail, a threaded hole is formed in one end of the first connecting line, and a metal sheet is arranged in the threaded hole through a threaded rivet.

The present invention discloses a fault detection and grounding protection system for a large-capacity pulse power device in the field of pulse power technology and application, comprising a preliminary detection module, a secondary verification module and a protection module; the preliminary detection module is used to determine the position of a faulty capacitor by the position where a reverse current appears, and output a first fault signal, and according to the first fault information, limit the current injected into the faulty capacitor; the secondary verification module is used to detect all capacitors, obtain fault characteristic signals of all capacitors, and output a second fault signal according to the distribution of the numerical values ​​of the fault characteristic information; the protection module is used to determine the position of the faulty capacitor according to the first fault signal and the second fault signal, and perform grounding protection on non-faulty capacitors, and is used to solve the problem in the prior art that when a Rogowski coil is used for fault detection, the electromagnetic field generated by the capacitor fault current affects the Rogowski coil detection data, resulting in low accuracy.

According to the power MOSFET device structure capable of improving the short circuit endurance capacity, in the structure, a first conductive type epitaxial drift region is located above a first conductive type substrate, a first base region of a second conductive type is arranged in the first conductive type epitaxial drift region, a second base region of the second conductive type is arranged in the first conductive type epitaxial drift region, and a second base region of the second conductive type is arranged in the second conductive type substrate; the first base region and the second base region are in contact with each other, the heavily doped base region of the second conduction type is arranged in the first base region or arranged in the first base region and extends into the second base region, the source region of the first conduction type is heavily doped, and the source region is arranged in the first base region and is in contact with the heavily doped base region; the current expansion region of the first conduction type is in contact with the first base region and the second base region and goes beyond the second base region and goes deep into the epitaxial drift region of the first conduction type, the gate oxide region is located above the first base region, part of the current expansion region and part of the source region in a contact manner, and the polycrystalline silicon region is arranged on the gate oxide region.

The utility model provides a self-leveling high-temperature pressure measuring device. The self-leveling high-temperature pressure measuring device comprises a heating module, an insulating plate, a self-leveling module and a pressure measuring module, the heating module is arranged on the self-leveling module through an insulating plate, and the self-leveling module is arranged on the pressure measuring module. According to the utility model, through mutual cooperation of the heating module, the insulating plate, the self-leveling module and the pressure measuring module, the stress uniformity of the bottom surface can be realized after the crimping type IGBT device is stressed, and the pressure value is fed back in real time, so that the mechanical pressure on the surface of a chip is reasonably distributed, and the mechanical damage of the internal area of the device is prevented.

A gate drive circuit adapted to high junction temperature environments, and its turn-on and turn-off methods, are disclosed. The gate drive circuit includes a main three-terminal transistor, a turn-off circuit, and an auxiliary circuit. The added auxiliary circuit generates an auxiliary current signal, either in the same direction or opposite to the control signal current, to the control electrode of the main three-terminal transistor during the turn-on and turn-off processes within a preset time period. This disclosure enables the generation of corresponding positive or negative auxiliary current signals at the control electrode of the three-terminal transistor. During the conduction process, the auxiliary circuit can generate a reverse auxiliary current signal at the control electrode of the three-terminal transistor during the current rise phase, reducing the drive current of the turn-on signal to decrease di. d / dt, suppressing the turn-on current; during the turn-off process, the auxiliary circuit can generate a unidirectional auxiliary current signal at the control electrode of the three-terminal transistor in the current-decreasing segment, increasing the drive current of the turn-off signal and accelerating the turn-off speed.

The present invention comprises: a solid-state circuit breaker, which is arranged between a battery system and a line and includes a semiconductor switch for providing an electrical connection or insulation between the battery system and the line according to the voltage applied to a gate terminal; an interrupter switch for providing a physical connection or separation between the solid-state circuit breaker and the line; and a rack battery management system which controls a gate driver applying the gate voltage, so as to provide insulation between the battery system and the line according to the result of sensing a current flowing between the battery system and the line, and which controls the interrupter switch to physically separate the solid-state circuit breaker from the line.

A charging apparatus according to an embodiment of the present technology includes an antenna section, a rectifier circuit, a power storage, and a charge controller. The antenna section is a dipole-structure antenna section that includes a first antenna conductor and a second antenna conductor that is a conductor different from the first antenna conductor, the first antenna conductor being electrically coupled to a target including a metallic body or a human body, the second antenna conductor not being connected to the target. The rectifier circuit rectifies output from the antenna section. The power storage generates power on the basis of output from the rectifier circuit and charges a power storing element with the power. The charge controller controls an operation of the power storage according to a voltage level of the power.

The invention discloses a power-on control circuit and a control method. The power-on control circuit comprises a controller, a grid voltage control circuit, a control circuit and a drain voltage switch circuit, the controller is in communication connection with the gate voltage control circuit and is used for controlling the magnitude of the output voltage of the gate voltage control circuit; the grid voltage control circuit is used for controlling the grid voltage of the GaN power amplifier; the control circuit is used for determining that the grid voltage reaches the turn-off voltage under the condition that the enable signal is effective and the output voltage of the second output end of the grid voltage control circuit is greater than the reference voltage, so as to control the conduction of the drain voltage switching circuit; the input end of the drain voltage switch circuit is connected with the output end of the control circuit, and the output end of the drain voltage switch circuit is connected with the drain electrode of the GaN power amplifier and used for providing positive voltage for the drain electrode of the GaN power amplifier when the drain voltage switch circuit is switched on. The power-on sequence of the grid electrode and the drain electrode of the GaN power amplifier can be accurately controlled, abnormal voltage and current are prevented from being generated, meanwhile, the complexity and the cost of a peripheral circuit are reduced, and the stability and the reliability of the whole circuit are improved.

A light emitting device of the present invention includes a substrate, a semiconductor element, a first external electrode, and a second external electrode. The substrate has a first conductivity type and contains a single-crystal silicon. The substrate has an upper surface and a lower surface on which thermally-oxidized films are formed. A first opening portion and a second opening portion are formed to be mutually spaced in the thermally-oxidized film formed on the lower surface. The substrate includes a diode structure unit that includes a first well region and a second well region. The first well region is formed in a first region along the lower surface, is exposed at the first opening portion, and has a second conductivity type different from the first conductivity type. The second well region is formed in a second region along the lower surface in the first region, is exposed at the second opening portion, and has the first conductivity type. The semiconductor element is disposed on the substrate and includes a semiconductor layer. The first external electrode is formed on a lower surface of the thermally-oxidized film and in contact with the first well region at the first opening portion. The second external electrode is formed on the lower surface of the thermally-oxidized film, spaced from the first external electrode, and in contact with the second well region at the second opening portion. The second well region extends to the first opening portion side exceeding a middle line between the first opening portion and the second opening portion along the lower surface of the substrate.

The invention provides an electromagnetic valve driving module, an electromagnetic valve driving system and electronic equipment, and the electromagnetic valve driving module comprises a first power tube, a second power tube, a driving unit and an interference isolation unit, and the interference isolation unit is connected with the driving unit when the first power tube is switched on and the second power tube is switched off. Enabling the first P-type doped region, the N-type well region and the second P-type doped region to be grounded so as to restrain current injected into the substrate; and when the first power tube and the second power tube are both turned off, the first P-type doped region, the N-type well region and the second P-type doped region are all in a suspended state so as to suppress the current extracted from the substrate, thereby suppressing the injection current and the extraction current of the substrate. Meanwhile, according to the technical scheme, an extra isolation structure and an extra P-type doped region do not need to be arranged, so that the occupation of the interference isolation unit on the area of the substrate is greatly reduced, and the manufacturing cost of the circuit is reduced.

The utility model discloses a water and electricity separated cooking machine convenient to maintain, which comprises a first machine body, a second machine body, a storage device and a control system, the second machine body is arranged on one side of the first machine body, and the first machine body is provided with a liquid placing area for installing and storing the storage device for seasoning and clear water; the control system is provided with a conveying driver, and the second machine body is provided with an electric control area used for installing the conveying driver for conveying the seasonings and the clear water in the storage device to the frying pan; and a waterproof partition is arranged between the electric control area and the liquid placement area. In this way, the storage device is installed in the liquid containing area, the conveying driver is installed in the electric control area, and water and electricity separation installation of the cooking machine is achieved; therefore, the electric elements can be prevented from being affected with damp to cause the safety risk of wading electric leakage, the water and electricity installation layering sense can be improved, the installation space is reasonably arranged, the working heat dissipation effect of the electric elements is better, the service life of the electric elements is prolonged, and later maintenance and repair are facilitated.

The embodiment of the utility model provides a charging circuit, a circuit board and a device, and the charging circuit comprises a protection unit which comprises a first resistor, a second resistor and a voltage stabilizing diode, the second end of the first resistor, the second resistor and the negative electrode of the voltage stabilizing diode are sequentially connected in series, and the protection unit is used for outputting a protection signal when the voltage stabilizing diode is reversely conducted; a first charging interface; a charging unit; the first switch unit is respectively connected with the first charging interface, the charging unit, the first end of the first resistor and the positive electrode of the voltage stabilizing diode; and the second switch unit is respectively connected with the series connection point of the first resistor and the second resistor, the positive electrode of the voltage stabilizing diode, the first switch unit and the first charging interface, and is used for triggering a protection signal of which the current value is not less than a preset value, so that the first switch unit cuts off the connection between the first charging interface and the charging unit. The charging voltage is divided through the first resistor and the second resistor, so that the current in the protection unit is suppressed to a certain extent, and the utilization rate of overvoltage tolerance is improved.

The utility model belongs to the technical field of heating power supplies, and particularly relates to a dual-channel high-power induction heating power supply, which comprises a three-phase input circuit, a dual-channel shunt circuit, a temperature rise section inverter circuit, a temperature rise section output circuit, a heat preservation section inverter circuit, a heat preservation section output circuit and a connection relation thereof. According to the utility model, the dual-channel shunt circuit, the temperature rise section inverter circuit, the temperature rise section output circuit, the heat preservation section inverter circuit and the heat preservation section output circuit are arranged, so that a temperature rise power supply and a heat preservation power supply can be integrated; besides, the resonant capacitor bank and the induction coils are arranged, so that the temperature rise power supply and the heat preservation power supply adopt two different operation frequencies, coupling resonance between the induction coils of the temperature rise power supply and the heat preservation power supply is avoided, current and power oscillation and unstable control are prevented, and direct-current bus overvoltage caused by coupling current is prevented.