49 results about "Thyristor rectifier" patented technology

An energy conversion arrangement 100 for an electrolysis system 150 comprises an adjustable transformer 101 having a primary-side 102 connectable to an AC power-grid 103 via a point-of-common-coupling, a secondary-side 104, and a tap-changer 105, rectifier transformers 106,107 having primary-sides 108,109 configured to provide secondary-side voltages differing by pre-defined phase-shifts, thyristor rectifier units 114,115,116,117 forming a multipulse rectifier system 118 receiving the secondary-side voltages and providing DC current to electrolyser units 119,120,121,122, and a protection controller unit 133 for connecting / disconnecting the arrangement to / from the grid depending on comparisons of secondary-side voltages with corresponding secondary-side threshold voltages, wherein the multipulse rectifier system comprises synchronization control circuits 123,124,125,126 providing thyristor gate-pulses at firing angles synchronized with the secondary-side voltages, and wherein the corresponding secondary-side threshold voltages are determined by a nominal threshold-voltage in accordance with a grid code at the point-of-common-coupling and physical transformer parameters, adjusted depending on tap-changer position information 129.

The invention provides a PWM / Buck cascade circuit auxiliary electrolytic hydrogen production rectification power supply and a control method, and relates to the technical field of electrolytic hydrogen production power supply and intelligent power grids, and the power supply comprises a main power loop and an auxiliary power loop; the main power loop comprises a multi-pulse thyristor rectifier, the power supply side of the multi-pulse thyristor rectifier is connected with an alternating-current power grid, the load side of the multi-pulse thyristor rectifier is connected with one end of a direct-current smoothing reactor, and the other end of the direct-current smoothing reactor is connected with the electrolytic bath; the auxiliary power loop comprises a PWM rectifier and a Buck circuit which are connected in series, the output end of the Buck circuit is connected to the output end of the main power loop in parallel through a direct-current LC filter, the output end of the Buck circuit and the output end of the main power loop are jointly connected into an electrolytic bath for ripple compensation, the multi-pulse rectifier adopts PI control, the PWM rectifier adopts voltage and current double-closed-loop control and SVPWM modulation, Buck adopts PI and feedforward compound control, and the output end of the Buck circuit and the output end of the main power loop are connected in parallel. The system has the advantages of improving the grid-side electric energy quality, the voltage utilization rate, the water electrolysis hydrogen production efficiency and the operation stability.

The invention discloses a hybrid hydrogen production power supply and a control method thereof. The hybrid hydrogen production power supply comprises a transformer, a main power rectifier and an auxiliary converter, wherein three-phase alternating current is connected to the input end of the main power rectifier after passing through the transformer, the output end of the main power rectifier leads out a positive electrode to be connected to an electrolytic bath, and the output end of the main power rectifier leads out a negative electrode to be connected to a power ground; the input end of the auxiliary converter is connected to a three-phase alternating current; an output end lead-out anode of the auxiliary converter is connected to an output anode of the main power rectifier; and the output end of the auxiliary converter leads out a cathode and is connected to the output cathode of the main power rectifier. According to the invention, on the basis of satisfying electrolytic hydrogen production, the harmonic current is compensated, and the alternating current side current harmonic distortion rate of the thyristor rectifier is reduced.

An energy conversion device 100 for an electrolysis system (150) comprises: an adjustable transformer (101) having a primary side (102) connectable to an AC grid (103) via a point of common coupling, a secondary side (104) and a tap switch (105); a rectifier transformer (106, 107) having a primary side (108, 109) configured to provide a secondary side voltage differing by a predetermined phase shift; a thyristor rectifier unit (114, 115, 116, 117) forming a multi-pulse rectifier system (118) that receives the secondary side voltage and provides a DC current to the electrolyser unit (119, 120, 121, 122); and a protection controller unit 133 for connecting / disconnecting the device to / from the power grid as a function of a comparison of the secondary-side voltage to a corresponding secondary-side threshold voltage, where the multi-pulse rectifier system comprises a synchronization control circuit (123, 124, 125, 126) providing thyristor gate pulses at an emission angle synchronized with the secondary-side voltage, and a protection controller unit 133 for connecting / disconnecting the device to / from the power grid as a function of a comparison of the secondary-side voltage to a corresponding secondary-side threshold voltage. And wherein the respective secondary-side threshold voltage is determined from a nominal threshold voltage specified by a grid guideline at the point of common coupling and a physical transformer parameter adjusted according to tap switch position information (129).

The invention discloses an efficient silicon controlled rectifier, and relates to the technical field of rectifiers, the efficient silicon controlled rectifier comprises a circuit board, a radiator is arranged at the top end of the circuit board, a placement bin is arranged at the top end of the circuit board, the silicon controlled rectifier is arranged in the placement bin, and a heat-resistant motor is arranged in the placement bin; the output end of the heat-resistant motor is in transmission connection with a speed change mechanism through a coupler, a bimetallic strip is arranged in the containing bin, and a push rod is arranged at one end of the bimetallic strip. The silicon controlled rectifier is pushed in along a sliding groove of a placement bin to complete installation, a toothed plate of the rectifier drives a gear to rotate, so that a first connecting rod pushes a second connecting rod to make contact with a power-on socket to achieve electricity conduction, and the temperature rises when the rectifier works; according to the structure, heat dissipation can be automatically adjusted according to the temperature, maintenance is easy and convenient, and a plurality of components do not need to be detached during replacement.

The intelligent control system comprises a three-phase thyristor rectifier bridge, a sampling unit and a master controller, the input end of the three-phase thyristor rectifier bridge is connected with a three-phase alternating current power supply, and the output end of the three-phase thyristor rectifier bridge is connected with the lifting electromagnetic chuck through a switch S1 and connected with a storage battery pack through a switch S2; and the storage battery pack is connected in series with the lifting electromagnetic chuck through the IGBT power switch Q1. According to the invention, the technical problems of unreliable magnetic retention intervention, uncontrollable magnetic force, logic conflict risk, huge volume, storage battery maintenance deficiency and the like of a traditional discrete system are solved, seamless switching between magnetic retention and excitation is realized, and accurate magnetic force control under all working conditions and intelligent maintenance of a storage battery in a full life cycle can be realized; the device has the advantages of high safety, strong reliability, compact structure, low cost and the like.

The invention discloses a 12 pulse wave / PWM hybrid rectifier based on multi-winding phase-shifting transformer power supply and a control method thereof, and relates to the technical field of hydrogen production equipment, and the 12 pulse wave / PWM hybrid rectifier comprises a three-phase AC power grid, a multi-winding phase-shifting transformer, a 12 pulse wave / PWM hybrid rectifier and an electrolytic cell. Wherein the additional winding of the multi-winding phase-shifting transformer adopts a type connection method, and provides a winding internal circulation path of harmonics of three times and multiple times of three; the control method comprises the steps of 12-pulse thyristor rectifier control, PWM rectifier control and DC-DC converter control, and a phase compensation mechanism is introduced for the phase difference generated by the main winding and the additional winding of the multi-winding phase-shifting transformer due to the structure. Through topology integration and an advanced coordination control strategy, the problems that in the prior art, water electrolysis equipment is complex, high in cost, large in harmonic wave and ripple wave, low in power factor, slow in dynamic response and the like are effectively solved.

The embodiment of the invention provides an overvoltage absorption circuit, an overvoltage absorption method and an overvoltage absorption system for a nuclear power plant. The overvoltage absorption circuit and the overvoltage absorption method are applied to the scene of the FORSMARK effect of nuclear-grade electrical equipment. The circuit comprises an alternating current module, a rectifier module, a load module and a voltage absorption module, wherein the rectifier module comprises a silicon controlled rectifier (SCR); the voltage absorption module is connected in parallel with the output end of the rectifier module; the voltage absorption module comprises an insulated gate bipolar transistor (IGBT) module and a resistor which are connected in series; the circuit further comprises a control assembly connected with the rectification module and used for collecting voltage parameters of the output end. Under the condition that the value of the voltage parameter is increased to a first threshold value, a first control signal is sent to the voltage absorption module, so that the IGBT module is in a conducting state; under the condition that the value of the voltage parameter is reduced to a second threshold value, a second control signal is sent to the voltage absorption module, so that the IGBT module is in a turn-off state; the first threshold value is greater than the second threshold value.

An energy conversion arrangement 100 for an electrolysis system (150) comprises an adjustable transformer (101) having a primary-side (102) connectable to an AC power-grid (103) via a point-of-common-coupling, a secondary-side (104), and a tap-changer (105), rectifier transformers (106,107) having primary-sides (108,109) configured to provide secondary-side voltages differing by pre-defined phase-shifts, thyristor rectifier units (114,115,116,117) forming a multipulse rectifier system (118) receiving the secondary-side voltages and providing DC current to electrolyser units (119,120,121,122), and a protection controller unit 133 for connecting / disconnecting the arrangement to / from the grid depending on comparisons of secondary-side voltages with corresponding secondary-side threshold voltages, wherein the multipulse rectifier system comprises synchronization control circuits (123,124,125,126) providing thyristor gate-pulses at firing angles synchronized with the secondary-side voltages, and wherein the corresponding secondary-side threshold voltages are determined by a nominal threshold-voltage as specified by grid code at the point-of-common-coupling and physical transformer parameters, adjusted depending on tap-changer position information (129).

The invention discloses a synchronous motor excitation system electronic field suppression switch and a control method thereof, the synchronous motor excitation system electronic field suppression switch comprises an excitation transformer, the excitation transformer is electrically connected with a rectifier bridge, one end of the rectifier bridge is electrically connected with an electronic field suppression switch, and the electronic field suppression switch is electrically connected with a motor excitation winding. The synchronous motor is arranged at one end of the motor excitation winding, the silicon controlled rectifier bridge and the electronic field suppression switch are both controlled by the control device, an electronic circuit is adopted for control, the on-off time is controlled to be millisecond level, the control precision is high, the reliability is high, a tedious relay control loop and a mechanical operation loop of the field suppression switch are omitted, and the cost is reduced. Due to the fact that the electronic field suppression switch directly achieves work and disconnection of the excitation loop through the electronic circuit, when the excitation loop is disconnected, no contact of a traditional field suppression switch exists, high-voltage direct-current arcs are generated when the loop is disconnected, and accidents that the field suppression switch is damaged due to improper treatment of the high-voltage direct-current arcs are avoided.

The invention discloses a high-voltage and low-voltage direct-current dual-output three-stage generator system and a design method. The system comprises a three-stage generator and a controller. The three-stage generator is composed of a permanent magnet auxiliary exciter, a main exciter, a main motor, a rotary transformer and a rotary rectifier. The controller comprises a voltage regulating circuit, a thyristor rectifier bridge, a diode rectifier bridge, a control circuit, a power generation control relay and a current sensor. The main motor is provided with a low-voltage three-phase winding and a high-voltage three-phase winding which respectively meet the requirements of low-voltage direct current and high-voltage direct current. According to the invention, the exciting current of the exciting winding of the main exciter is regulated through the voltage regulating circuit, so that the low-voltage direct-current voltage is stabilized at an expected voltage value; by means of phase-controlled rectification control, the output high-voltage direct-current voltage is stabilized at an expected voltage value, meanwhile, the switching frequency which is the same as the output electric frequency of the generator is adopted for power generation and voltage stabilization of the thyristor rectifier bridge, and the thyristor rectifier bridge has the advantages of being low in loss, low in high-frequency ripple frequency spectrum component, weak in high-frequency conduction and radiation interference, high in power density and the like.

A 36-pulse hydrogen production converter based on a controllable pulse multiplication balancing reactor belongs to the field of power electronics technology. It addresses the problems of high input current THD and output voltage ripple, as well as the large number of high-current thyristors required in existing 24-pulse thyristor-rectified hydrogen production converters. The present invention constructs a 36-pulse hydrogen production converter consisting of a nine-phase half-wave thyristor bridge, an auxiliary single-phase thyristor rectifier bridge, and a balancing reactor with a secondary side. The controllable pulse multiplication balancing reactor is composed of the balancing reactor with a secondary side and the auxiliary single-phase thyristor rectifier bridge. By controlling the thyristors in the nine-phase half-wave thyristor bridge and the auxiliary single-phase thyristor rectifier bridge and rationally designing the primary and secondary winding turns ratios of the balancing reactor with a secondary side, a 36-pulse hydrogen production converter can be achieved. The rectifier solution of the present invention requires only 18 high-current thyristors and is primarily suitable for renewable energy hydrogen production applications with high power quality requirements.

The invention discloses an electrolytic hydrogen production hybrid rectifier control system for fluctuating power input, and the system comprises a three-phase multi-winding transformer which is used for achieving the transformation of voltage and supplying power through a network side; the output end of the thyristor rectifier is connected with the electrolytic bath and used for supplying power to the electrolytic bath; the output end of the IGBT rectifier is connected with the electrolytic bath, and the IGBT rectifier is used for supplying power to the electrolytic bath; and the controller is used for adjusting the running state of the three-phase multi-winding transformer and the running power of the thyristor rectifier and the IGBT rectifier according to a two-stage power fluctuation range by receiving a power instruction sent by the energy management system. Through innovative circuit design and control strategies, accurate control over the electrolytic hydrogen production process is achieved, the hydrogen production efficiency is improved, the cost is reduced, and harmonic pollution to a power grid is reduced. The hybrid rectifier can better adapt to the volatility of renewable energy power generation, and an efficient, stable and economical solution is provided for the field of electrolytic hydrogen production.

The static discharge protection device of the present application including thyristor rectifier comprises: a substrate of a first conductive type; a ring disposed in the substrate, belonging to a second conductive type different from the first conductive type, comprising a first part and a second part spaced apart from each other; a first well of the first conductive type disposed in the substrate and disposed between the first part of the ring and the second part of the ring, spaced apart from the first part of the ring and the second part of the ring; a second well of the first conductive type disposed in the substrate and disposed between the first part of the ring and the second part of the ring, spaced apart from the first well, the first part of the ring and the second part of the ring; a third well of the first conductive type disposed in the substrate and disposed between the first well and the second well, spaced apart from the first well and the second well; and a cathode electrode connected between the first well and the third well, connected to the third well, and connected between the second well and the third well.

The invention discloses silicon controlled rectifier operation in a continuous current mode. A method of operating a silicon controlled rectifier (SCR) is provided. The method may include coupling the SCR to receive an AC voltage signal between an anode and a cathode of the SCR. The method may also include applying a gate current between a gate and a cathode of the SCR when the AC voltage signal has a first phase angle corresponding to the first voltage polarity, where the SCR switches from an OFF state to an ON state. The method may also include turning off a gate current between the gate and the cathode at a second phase angle of the AC voltage signal corresponding to a zero voltage cross of the AC voltage signal or corresponding to a second voltage polarity.

This invention discloses an apparatus including a silicon controlled rectifier (SCR). The apparatus includes: a substrate; a plurality of floating wells disposed within the substrate and spaced apart from each other, belonging to a first conductivity type; a plurality of electrodes disposed on the substrate; a ring disposed within the substrate and surrounding the plurality of floating wells, belonging to a second conductivity type; a peripheral well disposed within the substrate and surrounding the ring, belonging to the first conductivity type; and a first buried layer disposed within the substrate and connected to the ring, belonging to the second conductivity type. The plurality of floating wells are interconnected at their respective ends and disposed between the first buried layer and the upper surface of the substrate.

The utility model provides a silicon controlled rectifier equipment flushing device and cooling system relates to silicon controlled rectifier equipment field. This silicon controlled rectifier equipment flushing device includes: liquid inlet pipeline has at least first main pipe section and shunt pipe row, be provided with liquid inlet total valve and monitoring component on first main pipe section, shunt pipe row with first port intercommunication of a plurality of silicon controlled rectifier cooling flow channel, and liquid return pipeline is connected with second port intercommunication of a plurality of silicon controlled rectifier cooling flow channel, be provided with liquid return total valve and blow-off pipe on liquid return pipeline, wherein, monitoring component can show the impurity content of fluid in liquid inlet pipeline, a plurality of shunt branch pipes of shunt pipe row all are provided with branch valve, be provided with blow-off valve on blow-off pipe, the utility model can show in time and fast processing the impurity in silicon controlled rectifier equipment cooling flow channel, avoid the cooling water circulation pipeline blockage and cause the heat dissipation efficiency and production stability to reduce.

This application provides an icing monitoring device and method for power transmission lines, relating to the field of circuit technology. The device includes an icing monitoring module and an icing melting module. The icing melting module includes: a first thyristor rectifier bridge, the input of which is connected to an AC power source, and a first output of which is equipped with a first disconnecting switch, used to connect to a first end of the power transmission line via the first disconnecting switch; a second output of which is used to connect to a second end of the power transmission line; and a second thyristor rectifier bridge, the input of which is connected to an AC power source, the first output of which is used to connect to the first end of the power transmission line, and a second output of which is equipped with a second disconnecting switch. This application can reduce the damage rate of related components of power transmission lines.

The present invention provides a bidirectional thyristor rectifier comprising: a substrate of a first conductivity type, a well region of a second conductivity type, a shallow trench isolation structure, six heavily doped regions of the first conductivity type, six heavily doped regions of the second conductivity type, and four electrostatic discharge (ESD) injection layers of the first conductivity type. In the well region, there are four active regions arranged side by side, and the middle active region has forward and reverse thyristors and the ESD injection layer, and the active regions on both sides have forward and reverse diodes, and a heavily doped region of the first conductivity type in contact with the ESD injection layer of the first conductivity type is arranged between the thyristor rectifier and the diode, so that the heavily doped region of the second conductivity type of the diode is electrically connected to the aforementioned heavily doped region of the first conductivity type, so that the entire bidirectional thyristor rectifier can add two low-voltage auxiliary trigger paths composed of forward and reverse diodes, so as to greatly reduce the trigger voltage of the bidirectional thyristor rectifier in the forward and reverse working modes.

The invention provides a hydrogen production rectifier transformer, and relates to the technical field of transformers. The main voltage regulating winding and the auxiliary voltage regulating winding are arranged, the main voltage regulating winding and the high-voltage winding are connected through the on-load voltage regulating switch, and the auxiliary voltage regulating winding and the high-voltage winding pass through the non-excitation voltage regulating switch. The access proportion of the main voltage regulating winding is adjusted through the on-load voltage regulating switch, so that variable flux voltage regulation is realized; when the hydrogen production rectifier transformer is the power supply of the IGBT rectifier equipment, the access proportion of the auxiliary voltage regulation winding is adjusted through the non-excitation voltage regulation switch, and constant magnetic flux voltage regulation is realized; the thyristor rectification and the IGBT rectification are matched at the same time, the investment cost can be reduced, meanwhile, the occupied area is reduced, and the problems that when the thyristor rectification and the IGBT rectification are used in a combined mode, the investment cost is high, and the occupied area is large are solved.

A high-power four-quadrant converter system includes a double-secondary-side oil-immersed rectifier transformer with an output connected to four three-phase bridge type thyristor rectifiers, wherein every two rectifier bridges share a group of rectifier transformer secondary sides; two rectifier bridges sharing a group of rectifier transformer secondary sides are inversely connected in parallel, one of the two rectifier bridges realizes a forward output, and the other one realizes a reverse output; two groups of rectifier bridges which output in the same direction can operate independently or in parallel; when the two groups of rectifier bridges operate in parallel, reactors are connected in parallel to realize current sharing; and the rectifier bridges for the forward output and the reverse output realize free smooth transition under control of a controller, so that a four-quadrant operation of an output current is realized. When the system operates, the electromagnetic compatibility of sensitive components is high.

The utility model discloses a solve the problem that the structure of wiring terminal is more complex in the existing thyristor rectifier module, provide a kind of thyristor module that intermediate trigger maintains lead-out, including thyristor structure, shell, cover;Wherein thyristor structure includes bottom plate and circuit board, and circuit board is fixed on bottom plate;Bottom plate is fixedly installed in the bottom of shell, and the top of shell is also fixedly connected with cover;Still include first electrode, second electrode and mounting seat;Mounting seat is fixedly arranged in shell interior;Mounting seat is provided with the plug-in hole, and the opening direction of plug-in hole is towards cover, and first electrode is inserted into plug-in hole;First electrode is also connected with circuit board through wiring;The other end of first electrode passes through cover, and is exposed on the upper surface of cover;One end of second electrode is directly connected with circuit board, and the other end of second electrode passes through cover, and is exposed on the upper surface of cover;Overall structure is simple, and connection is stable.

The invention discloses a thyristor rectification system control method based on power grid voltage zero crossing point detection. The method comprises the following steps: S1, sampling a first voltage, a second voltage and a charging current; s2, according to the effective value of any phase voltage, judging whether the three-phase alternating-current power grid has a fault or not, if the fault occurs, entering step S3, and if the fault does not occur, entering step S4; s3, a trigger pulse signal of the thyristor rectifier bridge is filled with a dead zone, and a high-magnification energy storage unit is started to supply power to a load; s4, performing zero-crossing detection according to the voltage value of any phase voltage at the current moment and the voltage value of any phase voltage at the previous moment so as to judge whether the voltage of the power grid is in a forward zero-crossing state, if so, entering step S5, and if not, entering step S5; and S5, performing phase compensation and boundary limitation on the initial trigger angle, and finally generating a trigger pulse signal of the thyristor rectifier bridge according to the trigger angle after phase compensation and boundary limitation so as to perform charging management on the high-magnification energy storage unit. The method has the advantages of high real-time performance, high robustness and high reliability.

An electrical power system for supplying a ship (120) with a DC voltage from the shore side, the electrical power system comprising: a transformer (101), the primary side of which is connectable to a shore-side AC voltage network (130); a diode or thyristor rectifier (102), the AC voltage terminals of which are connected to the secondary side of the transformer; the electric connector (103) is used for being connected to the ship; and a DC voltage link (104) for transmitting a DC voltage from the DC voltage terminals of the rectifier to the electrical connector. The transformer comprises an on-load tap changer (105) for changing the transformation ratio. The power system includes a controller (106) for controlling the on-load tap changer to control a DC voltage supplied to the vessel. Natural switching of rectifier diodes or thyristors does not cause potentially detrimental high frequency common mode voltages and currents. In addition, the number of power conversions is minimized, which provides energy efficient power transfer.

The invention relates to an energy conversion arrangement 100 for an electrolysis system 150. It comprises an adjustable transformer 101 having a primary-side 102 connectable to a power grid 103, and a secondary-side 104, a sensor device 105 sensing an alternating primary-side voltage at the adjustable transformer, rectifier transformers 106,107 having primary-sides 108,109 connected to the adjustable transformer secondary-side and providing on their secondary-sides 110,111,112,113 alternating secondary-side voltages differing by pre-defined phase-shifts, and thyristor rectifier units 114,115,116,117 forming a multipulse-rectifier-system 118 that receives the secondary-side voltages and provides DC-current to electrolyser units 119,120,121,122. The multipulse-rectifier-system comprises synchronization control circuits 123,124,125,126 providing thyristor gate pulses to the thyristor rectifier units at firing angles synchronized with synchronization voltage signals 130 differing by the pre-defined phase-shifts, wherein before application of the pre-defined phase-shifts, the synchronization voltage signals 130 directly correspond to the alternating primary-side voltage sensed at the adjustable transformer primary-side 102.

The invention discloses an electrostatic protection device of a silicon controlled rectifier. The electrostatic protection device comprises a first conductive type substrate; a first conductivity type epitaxial layer (PEPI); and a first conductivity type well region (PW) and a second conductivity type well region (NW) disposed within the PEPI. The device is characterized by further comprising a floating first conductive type heavily doped region (P +) which is arranged in the PW and at least partially stretches across the PW / PEPI junction region, and a floating second conductive type heavily doped region (N +) which is arranged in the NW and at least partially stretches across the NW / PEPI junction region. According to the floating heavily doped region, the current amplification coefficient of the floating heavily doped region is reduced by increasing base region doping of a corresponding parasitic transistor, so that the maintaining voltage (Vh) of the device is improved, and latch-up is inhibited. Moreover, the floating heavily doped region forms a parasitic diode structure in the PEPI, and the parasitic diode structure is used for determining the trigger voltage (Vt1) of the device. The device has the advantages of high maintaining voltage, settable trigger voltage, high robustness and bidirectional protection.

The invention discloses a silicon controlled rectifier for core particle electrostatic pulse rapid clamping. The silicon controlled rectifier comprises a substrate P-Sub, a first DN-Well region, a second DN-Well region, a first P-Well region, a second P-Well region, a first N-Well region, a second N-Well region, a first field oxygen isolation region, a second field oxygen isolation region, a third field oxygen isolation region, a fourth field oxygen isolation region, a fifth field oxygen isolation region, a sixth N + injection region, a third P + injection region, a fourth P + injection region, a fifth P + injection region, a sixth P + injection region and a second polysilicon gate. According to the invention, a silicon controlled rectifier structure with self-gain and rapid electrostatic pulse clamping is formed, and the protection level of chip core particle bonding electrostatic discharge can be improved; a polysilicon gate is controlled to open a channel, current is injected to conduct a parasitic NPN triode, and a low-trigger silicon controlled rectifier is further coupled, so that an electrostatic protection structure with a multi-channel parallel path is formed, the current discharge capacity of the device per unit area is remarkably enhanced, and the purpose of realizing rapid clamping of electrostatic voltage in a core particle is achieved.

The utility model relates to a control system for enhancing the performance of a lifting electromagnet. The control system comprises an intelligent thyristor rectifier module MOD1, a resistor R1, a resistor R2, a first switch branch and a second switch circuit, a resistor R1 is connected between the first control end and the second control end of the intelligent thyristor rectifier module MOD1; a resistor R2 is connected between the second control end and the third control end of the intelligent thyristor rectifier module MOD1; the resistor R2 is connected in parallel with a first switch branch and a second switch branch. Under the condition that the internal structure of the electromagnet is not changed, the electric control system improves the working voltage of the electromagnet in the first 10 seconds to 297 VDC by improving the T1 secondary voltage, so that the electromagnet can attract more materials, then the voltage of the electromagnet is adjusted to the normal working voltage 220 VDC, it is guaranteed that the electromagnet has enough attraction force, and the electromagnet can attract more materials. And the working efficiency of the electromagnet is obviously improved.

The invention relates to an energy conversion device (100) for an electrolysis system (150). It comprises a tunable transformer (101) having a primary side (102) connectable to an electrical network (103) and a secondary side (104), a sensor device (105) sensing an alternating primary side voltage of the tunable transformer, a rectifier transformer (106, 107) having a primary side (108, 109) connected to the secondary side of the tunable transformer and providing an alternating secondary side voltage differing from a predefined phase shift on the secondary side (110, 111, 112, 113), and a thyristor rectifier unit (114, 115, 116, 117) forming a multi-pulse rectifier system (118) that receives the secondary side voltage and provides a DC current to the electrolyzer unit (119, 120, 121, 122). The multi-pulse rectifier system includes a synchronization control circuit (123, 124, 125, 126) to provide thyristor gate pulses to the thyristor rectifier unit at an emission angle that is synchronized with a synchronization voltage signal (130) differing from a predefined phase shift and varies in accordance with an electrolyzer DC current request, where the synchronization control circuit (123, 124, 125, 126) is activated before the predefined phase shift is applied. The synchronous voltage signal (130) directly corresponds to an AC primary side voltage sensed at the adjustable transformer primary side (102).

A method for operating a hybrid rectifier includes an AC input, a DC output and a thyristor rectifier arranged in a first path, and a transistor rectifier arranged in a second, parallel path. The method includes when a DC voltage at the DC output of the hybrid rectifier is below a voltage threshold value, operating the hybrid rectifier in a first operating state in which the transistor rectifier is isolated from the DC output and connected to the AC input and the thyristor rectifier is connected both to the AC input and to the DC output. When the DC voltage at the DC output of the hybrid rectifier reaches or exceeds the voltage threshold value, operating the hybrid rectifier in a second operating state in which the thyristor rectifier and the transistor rectifier are each connected to the AC input and to the DC output.