51results about How to "High isolation voltage" patented technology

The invention relates to the design field of a switch power supply, in particular to a high position energy-taking power supply device of a submodule of an MMC valve and a realizing method thereof. The high position energy-taking power supply device supplies power to a controller, a driver and a protective device of the submodule of the MMC valve. The device is characterized in that the device comprises a main circuit, electromagnetic interference circuits respectively arranged at input and output ends of the main circuit, and a fault output circuit arranged at the output end of the main circuit. The fault output end of the fault output circuit is connected with the controller of the submodule through optical fiber. The device provided by the invention has the characteristics of wide input voltage range, high isolation voltage and high reliability. Through serial input of a multi-flyback circuit, the input voltage stress is reduced, the reliability of the circuit is improved, and the electromagnetic compatibility (EMC) characteristic of the power supply is improved. Two-level isolation makes circuit outputs separated from each other, and the output short-circuit does not affect input.

The invention discloses a broadband high-voltage intelligent resistance voltage-division voltage sensor, which consists of the following components: a resistance type voltage divider (1) used to pick voltage signal from a measured voltage circuit, a high-voltage side signal processing device (2) used to convert the analog voltage signal output from the resistance type voltage divider (1) into digital signal and carry out operation processing, a set of communication optical fibers (5) connecting the high-voltage side signal processing device (2) and a low-voltage side digital display terminal (6), a high-voltage side electric source (3) providing working electric source for the high-voltage side signal processing device (2) and a high-voltage isolating transformer (4) connecting the high-voltage side electric source (3) and a low-voltage side power supply electric network. The broadband high-voltage intelligent resistance voltage-division voltage sensor has wide frequency response scope, AC/DC commonality, wide effective testing scope, no magnetic saturation problem, high measuring precision, high voltage resistance, high linearity, low temperature drift, easy calibration and strong anti-interference capability, and is suitable to be used in places such as an electric motor manufacturing enterprise and an electric motor research and detection center, etc.

A high-power silicon controlled rectifier cabinet continuity detection device comprises three parts, namely a signal acquisition part, a signal processing part and a transmitting and displaying part, wherein the signal acquisition part acquires the bridge arm current of a silicon controlled rectifier via a sensor and measures the tube voltage drop of the silicon controlled rectifier via a low time-lag transmitter. As the bridge arm current and the tube voltage drop of the silicon controlled rectifier are opposite in phase, when the silicon controlled rectifier is cut off, the tube voltage drop is the anode alternating current line voltage; when the silicon controlled rectifier is triggered to be on, the tube voltage drop is very low as 2V approximately; each round comprises a continuity period and a cutoff period; and according to the relationship, the signal processing part can preliminarily judge whether the silicon controlled rectifier is in a controllable state.

The invention relates to an isolation circuit. The isolation circuit comprises an isolation capacitor module, a first sampling resistor, a first amplifier and a latch; the first sampling resistor, thefirst amplifier and the latch are positioned on the second tube core; one end of the isolation capacitor module receives an input signal; the other end of the isolation capacitor module is connectedwith one end of a first sampling resistor and the input end of a first amplifier; the output end of the first amplifier is connected with the input end of the latch, the other end of the first sampling resistor is grounded, the isolation capacitor module comprises one or more isolation capacitors, the isolation capacitor module is located on the first tube core and/or the second tube core, and thegrounding end of the first tube core and the grounding end of the second tube core are not grounded in common. High isolation voltage can be achieved through the isolation circuit, and a CMOS technology is adopted in the whole technical scheme.

The invention relates to a wide voltage input and invariable voltage output power supply module, which comprises a protection circuit, a voltage conversion circuit and an invariable voltage output circuit, wherein the protection circuit is connected with the voltage conversion circuit through a filter circuit, the voltage conversion circuit is directly connected with the invariable voltage outputcircuit; the protection circuit consists of an overcurrent protection circuit and an EMC (Electro Magnetic Compatibility) protection circuit, the overcurrent protection circuit is connected with an input voltage, and is connected with the filter circuit through the EMC protection circuit. The wide voltage input and invariable voltage output power supply module has the advantages of reasonable structure, high reliability, strong practicability, wide voltage input, invariable voltage high-precision output, strong antijamming capability, high isolation voltage and high conversion efficiency, andcan be used under any worse electric environment. The overcurrent protection circuit can protect devices in circuits from being damaged when the input voltage generates overcurrent or short-circuit; by the protection of the EMC circuit, the noise and ripple waves in the input voltage can be reduced, and the antijamming capability is strong.

The present invention provides an isolation circuit, comprising: a main isolation capacitor, a second capacitor, a secondary isolation capacitor, a fourth capacitor and an amplifier, wherein the second end of the main isolation capacitor is connected to the first end of the second capacitor and the input terminal of the amplifier; the second terminal of the secondary isolation capacitor is connected to the first terminal of the fourth capacitor and the input terminal of the amplifier; the second terminal of the second capacitor and the fourth capacitor The second terminal is commonly connected to the ground terminal; the input of the first terminal of the primary isolation capacitor and the first terminal of the secondary isolation capacitor are in anti-phase; and wherein the second capacitor, the fourth capacitor and the amplifier are in the second in the die. Through one or more embodiments of the present invention, a higher isolation voltage can be achieved, and since the circuit and isolation capacitor are made of CMOS technology, there is no aging problem of the optocoupler, the performance changes with temperature, and the electrical performance is poor. Therefore, the quality is stable, the life is long, and the cost is low.

The invention provides a pulsed magnet field generator based on coil spherical focusing and IGBT single transistor parallel connection. The pulsed magnet field generator comprises a power supply system, a pulse current forming system, five coil spherical optimization focusing devices, a signal transformation system and a synchronized trigger module, and the switching power supply of the power supply system carry out voltage reduction on an alternating current power supply to form direct currents, is connected with the pulse current forming system, the signal transformation system and the synchronized trigger module and supplies power. The output ends of pulse generating modules M1-M5are connected with current carrying coils C1-C5 in the five coil spherical optimization focusing devices respectively. The electrical-optical converter J2 of the signal transformation system is respectively connected with the control ends of the pulse generating modules M1-M5. The output end of the synchronized trigger module is respectively connected with the electrical-optical converter J1 and the electrical-optical converter J2 of the signal transformation system. The pulsed magnet field generator is high in integration level, longer in service life and higher in work efficiency, the circuit size is greatly reduced, and the loss of the whole circuit is lowered.

A high-isolation voltage electric-light-electric isolation structure comprises a light source chip and a light detection chip which are arranged by being opposite in position; the space between the light source chip and the light detection chip and the space around the light source chip and the light detection chip are filled by insulation light guide glue; the innovative points are that a light guide tube is arranged between the light source chip and the light detection chip; an inner hole of the light guide tube, the light source chip and the light detection chip are arranged by being aligned; insulation light guide glue is injected in the light guide tube of which the dielectric strength is greater than that of the insulation light guide glue. The high-isolation voltage electric-light-electric isolation structure has the beneficial effects that the problem that the light quantity reaching the light detection chip is reduced because of the rising of an isolation voltage is solved, and the electric-light-electric isolation structure can obtain the larger isolation voltage.

The invention provides an IGBT series connection based high-voltage pulse superposition direct-current electric field generator. The generator generates bipolar high-voltage pulse through an IGBT single-tube series circuit, and superposes high-voltage direct current on the basis of the bipolar high-voltage pulse generated by the IGBT single-tube series circuit; and compound voltage generated by the IGBT series connection based high-voltage pulse superposition direct-current electric field generator acts on an oil purifying device provided with a positive plate and a negative plate, and then, a direct-current steep pulse compound electric field is generated between the positive plate and the negative plate. Abundant frequency components of the bipolar steep pulse electric field can act on various colloid impurity particles, so that the particles perform reciprocating movement to be separated from oil molecules, then, the particles perform directional movement under the action of the high-voltage direct-current electric field and are absorbed on the polar plates, and accordingly, degraded transformer oil is purified.

The invention provides a high-voltage and high-frequency transformer. The high-voltage and high-frequency transformer comprises a framework, and a first inner insulating layer, a magnetic shielding layer, a second inner insulating layer, a first primary side layer, a first primary side and secondary side interlayer insulating layer, a secondary side layer, a second primary side and secondary side interlayer insulating layer, a second primary side layer and an outer insulating layer which are wound on the framework in a direction perpendicular to the axis of the framework in sequence. Correspondingly, the invention also provides a winding method for the high-voltage and high-frequency transformer. The high-voltage and high-frequency transformer disclosed by the invention also has high-isolation-voltage and high-frequency performance.

The invention relates to the field of intelligent super-junction MOS devices, and discloses an intelligent super-junction MOS device and a manufacturing method thereof. According to the invention, the intelligent super-junction MOS device comprises a main MOS and a plurality of functional MOS which are integrally connected on a chip, and the intelligent super-junction MOS device is characterized in that the functional MOS is arranged in the range of the main MOS, the distribution of the functional MOS on the chip comprises a functional MOS isolation region and a functional MOS active region, and the functional MOS active region comprises a plurality of groups of P-type doped region columns and N-type doped region columns which are parallel to each other and are arranged at intervals. The functional MOS isolation region comprises N-type doped region columns and P-type doped region columns, the N-type doped region columns surround the periphery of the functional active region in a square shape, and the P-type doped region columns are evenly distributed in the N-type doped region columns in a lattice shape. According to the intelligent super-junction MOS device disclosed by the invention, the independence of a functional MOS active region can still be ensured after process high-temperature annealing, and ultrahigh isolation voltage can be ensured.

The invention provides a novel engine test bed electronic throttle signal simulator and relates to the technical field of automobile engine detection experiments. The novel engine test bed electronic throttle signal simulator aims at solving the problem that an existing old engine test bed is not provided with an electronic throttle signal interface, the function of the electronic throttle signal interface can be achieved by contacting with a test bed supplier to update a whole system and consuming high cost and accordingly lots of old test beds on service cannot meet the requirement for engine tests controlled by electronic throttles. The signal output end of an engine test bed mechanical throttle control system is connected with the signal input end of a switching amplifier with high common mode rejection ratio of the mechanical throttle control system, the signal output end of the switching amplifier with the high common mode rejection ratio outputs a signal to an engine ECU through a voltage operation adjusting circuit, a voltage isolation module circuit and a second group of driving voltage generating circuits. The novel engine test bed electronic throttle signal simulator is applicable to modification of the old engine test beds, achieves an electronic throttle signal output function and has high common mode rejection ratio and fault-tolerant capability and very low non-linear voltage.

The invention relates to a trench type high-voltage isolation capacitor device based on a Trench process and a preparation method, at least four grooves are formed in a silicon substrate, high-temperature oxidation is performed on the silicon substrate on the side surfaces and the bottom surfaces of the grooves and the upper surface of the silicon substrate to form a silicon dioxide dielectric layer, polycrystalline silicon is filled in the grooves, grounding polycrystalline silicon is formed in the leftmost groove and the rightmost groove, high-voltage isolation capacitor polycrystalline silicon is formed in the middle groove, an insulation covering silicon dioxide layer and an insulation covering silicon nitride layer are arranged on the upper surface of the polycrystalline silicon, a contact hole is formed in the insulation covering layer, and a grounding polycrystalline silicon extraction electrode and a high-voltage isolation capacitor polycrystalline silicon extraction electrode are arranged in the contact hole. The capacitor device is high in voltage resistance and simple in structure, the preparation method solves the problem that the thickness of the silicon dioxide dielectric layer of the capacitor device is difficult to grow, and high isolation voltage of the capacitor device is achieved.

The invention provides an isolation circuit which comprises a main isolation capacitor, a second capacitor and a first amplifier, wherein the main isolation capacitor has one end and another end, the other end of the main isolation capacitor is connected to one end of the second capacitor and the input end of the first amplifier, the other end of the second capacitor is connected to a second ground terminal, and the second capacitor and the first amplifier are in a second tube core. Through one or more embodiments of the present invention, high isolation voltage can be achieved, since the circuit and the isolation capacitor are made by CMOS process, the problems of the aging of an optocoupler, the change of performance with temperature and poor electric performance do not exist, so the quality is stable, the service life is long, and the cost is low.

The invention discloses an isolated upper bridge bootstrap charge pump circuit for a bridge driver and a control method. The isolated upper bridge bootstrap charge pump circuit for a bridge driver hasthe advantages of simple circuit structure, convenience in assembly and strong expandability. The circuit comprises a square wave generator, two groups of pulse conversion circuits, a switching circuit and a transformer output circuit, and the square wave generator, two groups of pulse conversion circuits, the switching circuit and the transformer output circuit are connected step by step; the square wave generator is used for generating square waves with the high level of VH and the low level of 0; the two groups of pulse conversion circuits are connected in parallel between the square wavegenerator and the switching circuit and are used for converting the square wave into positive and negative alternating pulse voltage signals and inputting the positive and negative alternating pulse voltage signals into the switching circuit; the transformer output circuit comprises a primary winding T1, a primary winding T2 and a secondary winding T3; the primary winding T1 and the primary winding T2 are connected end to end in a duplex winding mode to serve as input ends to be connected with the switching circuit, and a common end is connected with the input port 001 of the voltage source; and the secondary winding T3 adopts a single winding mode to serve as an output end, and two ends of the secondary winding T3 are respectively a voltage output positive port 002 and a voltage output negative port 003.