47results about How to "Wide voltage regulation range" patented technology

The invention discloses a bidirectional resonant converter and a control method thereof, which belong to the technical field of power electronic converters. The bidirectional resonant converter is composed of a primary side full-bridge circuit, an auxiliary inductor, a resonant circuit, a transformer and a secondary side full-bridge circuit, wherein the resonant circuit is composed of a resonant inductor and a resonant capacitor. By constructing a fully-symmetrical circuit structure and utilizing the primary side full-bridge circuit and the secondary side full-bridge circuit, the bidirectional resonant converter has a bidirectional power transmission capacity, the duty ratio control and the phase shifting angle control are adopted so that voltage at the two sides and bidirectional currents can be adjusted in a wide range, and the switching process of power transmission directions can be rapid and smooth. According to the bidirectional resonant converter and the control method thereof, the bidirectional resonant converter has the bidirectional power transmission capacity, the control strategy is simple, soft switching of all switching tubes is realized, the switching loss can be effectively reduced, the efficiency can be effectively improved, and the bidirectional resonant converter and the control method thereof are especially suitable to be used in bidirectional isolated DC power conversion occasions such as energy storage systems and electric vehicles.

This invention relates to three phase stabilizing regulator comprising microcomputer sampling controller, control circuit and three phase compensation transformer. The characters are: secondary winding of each phase of the transformer having only one coil, and series connected between power source and load; each primary winding having more than one coils and taps, each tap being connected to corresponding phase and zero line of input three phase power source by corresponding contactor of control circuit or contact of solid relay. The main control point is that: phase voltage and/or line voltage in regular or irregular order combination is imposed upon each coil of primary winding of compensationt ransformer, to achieve even compensation, lowering working current in primary winding of compensation transformer. Advantaegs are: simple structure, low cost, high stability precision.

The invention discloses an arc-free compensatory single phase voltage regulating and stabilizing device, including protection electric appliance, sample controller, control circuit and compensating circuit, and its characteristic: the control circuit includes several relays, the control coil of each relay is controlled by the sample controller and the corresponding contact of each relay controls the compensating circuit. The compensating circuit includes a compensating transformer, the secondary winding coil of the compensating transformer is connected in series between power supply and load and the primary winding coil is provided with several series coils, the tap terminal of each coil is connected with phase or zero lines through the corresponding contacts of several relays of the control circuit. In use course, the voltage and current is uninterrupted, the primary winding coil makes forward or backward compensation on the output of the secondary winding coil by making delayed and arc-free switching of different coil groups under the control of the sample controller and control circuit, realizing the function of adjusting and stabilizing output voltage. It is applied to single phase voltage adjusting and stabilizing power supply.

The invention relates to an enhanced voltage regulation constant current device and a constant current power supply which is constituted thereby, the voltage regulation constant current device comprises an input end and an output end, which is characterized in that a shunt resistance is electrically connected between the input end and the output end. As the enhanced voltage regulation constant current device and the constant current power supply of the invention reduce the power consumption of the voltage regulation constant current device, the enhanced voltage regulation constant current device and the constant current power supply have the advantages of great constant current and/or wide voltage regulation range and so on.

The invention discloses a CLTCL resonant current converter. The CLTCL resonant current converter is composed of a half-bridge inversion circuit, a CLTCL resonant circuit and a diode rectification circuit, which are connected in sequence; the converter is input through the half-bridge inversion circuit and is output from the diode rectification circuit through the action of the CLTCL resonant circuit; the half-bridge inversion circuit is composed of a first switching tube and a second switching tube; the CLTCL resonant circuit is composed of a first capacitor, a second capacitor, a first inductor, a second inductor, a first transformer and a second transformer; the diode rectification circuit comprises a first diode, a second diode, a third diode, a fourth diode and a third capacitor; the converter is of a novel direct-current converter circuit topology and can realize zero voltage switching (ZVS) and quasi-zero current switching (Q-ZCS) of the switching tubes, and zero current switching (ZCS) of the diodes of the rear-grade rectification circuit; the efficiency and capacity of the converter are improved; the CLTCL resonant current converter has the characteristic that an input/output voltage wide range is adjustable.

The invention belongs to the technical field of power source equipment and relates to an energy conservation type switch power source. Power input with electric supply of 220V is connected with a rectification filter circuit. An output end of the rectification filter circuit is connected with a direct current auxiliary source circuit of 5V in parallel. The output end of the rectification filter circuit is respectively connected with a relay and a Boost converter in series. An output tail end of the rectification filter circuit is respectively and electrically connected with a voltage detection circuit, a current detection circuit and an analog to digital (AD) sampling circuit. An output end of the AD sampling circuit is electrically communicated with a central processing unit (CPU) control circuit. An output end of the CPU control circuit is electrically connected with a high-frequency switch circuit with IR2110. A current detection sampling circuit is electrically connected with a drive circuit. The drive circuit is respectively and electrically connected with the Boost converter, the high-frequency switch circuit with IR2110 and the relay. The relay, the Boost converter and the drive circuit are electrically communicated to form a power main circuit. The energy conservation type switch power source is simple in structure, low in power consumption, high in efficiency, low in noise, strong in anti-jamming capability and wide in voltage stabilization range.

The invention discloses a resonant switched capacitor converter. The resonant switched capacitor converter provided by the present invention comprises: a first inductor switch series branch, a secondinductor diode series branch, a third inductor diode series branch, a second switch, a second diode, a fourth diode , a first resonant capacitor, a second resonant capacitor, and an energy storage capacitor. The resonant switched capacitor converter provided by the invention realizes a "charge balance" mode in which two sets of resonant currents exist simultaneously, can realize the turn-on of theswitching transistor ZCS and the turn-off of the diode ZCS, has high voltage transmission efficiency and a wide voltage adjustment range, can achieve linear voltage regulation, and enables efficientlinear voltage regulation in a wide range even under light load conditions.

The invention relates to an isolated type photovoltaic array simulator system based on a calculation method. The isolated type photovoltaic array simulator system based on the calculation method comprises a rectification module, an isolation module, an inverter, a sampling module, a control module, a drive module and a power module, wherein the rectification module is connected with the input end of the inverter through the isolation module; the input end of the sampling module is connected with the output end of the isolation module; the output end of the sampling module is connected with the input end of the control module; the output end of the control module is connected with the input end of the drive module; the output end of the drive module is connected with the isolation module; the power module is connected with the drive module and the control module. The isolated type photovoltaic array simulator system based on the calculation method provided by the invention adopts a ZVZCS (Zero Voltage Zero Current Switching) full-bridge circuit with isolation as a main circuit, so that the high-power operation and a broader voltage regulation range can be realized, the electric isolation protection for the inverter is realized, and a safety performance of the system is improved. The calculation method is adopted as a method for photovoltaic characteristic curve simulation, so that not only are the continuity and the accuracy of a simulated photovoltaic characteristic curve improved, but also a lot of storage spaces are saved.

The invention provides a single-phase silicon-controlled AC voltage stabilizer, which solves the problems of narrow voltage-stabilizing scope, slow response, low efficiency, complicated structure, and high manufacture cost existing in current AC voltage stabilizer. The voltage stabilizer comprises a power input end and a power outlet end, a voltage regulator circuit is equipped between the power input end and the power outlet end, a control circuit is equipped between the voltage regulator circuit and the power output end, the control circuit is connected with an operating circuit. The single-phase silicon-controlled AC voltage stabilizer integrates intelligent measurement and control, silicon-controlled non-contacting switch and transformer technology together, has the characteristics of wide voltage-stabilizing scope, quick response, quietness, high reliability, high efficiency, simple structure, relative low manufacture cost; adopts a latest technology in no need of current-limiting resistance, which is capable of greatly improve the reliability and efficiency of the overall machine, a prototype tested by post and telecommunication industry products quality supervision test center in information and industry ministry has an overall efficiency reaching to 99.2%; and has perfect self-testing and protection function.

The invention is to provide a cabinet air-conditioner controller, which comprises a CPU, a memory, a display, an I/O interface, an A/D converter as well as a D/A converter. The invention is characterized in that the CPU and the I/O interface are controlled by a two-line system I<2>C series bus. The cabinet air-conditioner controller is able to overcome the shortcomings in the prior art, realizes the access or removal under the power supply of the system, and is able to conveniently carry out the fault diagnosis and track to a node, therefore, the module needed to be processed or modified is correspondingly upgraded and modified, which decreases the risk cause by the misoperation or inappropriate modification, and enhances the maintainability of the whole system.

The invention relates to a switching type stabilized voltage supply circuit. Although a traditional linear stabilized voltage supply is simple in circuit structure and reliable in operation, the traditional linear stabilized voltage supply has the defects of being low in efficiency, large in size, large in copper consumption and iron consumption, high in working temperature, small in adjusting range and the like. The switching type stabilized voltage supply circuit comprises a control circuit, a rectifying filter circuit, a high-frequency exchange circuit and a pulse-width modulation square-wave rectifying filter circuit. The control circuit is composed of a sampling circuit, a comparison circuit and a pulse-width modulation circuit, the sampling circuit, the comparison circuit and the pulse-width modulation circuit are sequentially connected in series, the pulse-width modulation circuit is in series connection with an oscillating circuit, the comparison circuit is in series connection with a reference voltage circuit, the sampling circuit of the control circuit is connected with the pulse-width modulation square-wave rectifying filter circuit, efficiency of the pulse-width modulation circuit, the high-frequency exchange circuit and the switching type stabilized voltage supply circuit can reach more than 85%, and the stabilized voltage range is wide. In addition, the switching type stabilized voltage supply circuit has the advantages of being high in voltage stabilizing precision, free of a power transformer and the like.

The invention provides a magnetic-saturation intrinsically-safe power supply. The power supply comprises an alternating current power supply input module, a rectifying and filter circuit module, a voltage regulating circuit module and an intrinsically-safe power supply output module which are electrically connected sequentially. The power supply is characterized by also comprising a magnetic-saturation voltage stabilizing circuit module which is electrically connected between the alternating current power supply input module and the rectifying and filter circuit module. The magnetic-saturation intrinsically-safe power supply is good in voltage output stability, wide in voltage stabilizing range, high in reliability, capable of improving the voltage stabilizing effect further so as to achieve explosion-isolation and explosion-proof effects and particularly suitable for power supply to electrical devices in hazardous environments with explosive or flammable gases, steam, liquids and the like.

The invention discloses an intelligent power supply in the field of power supply. The original edge of a transformer is provided with a plurality of sets of suckers; the input end of the power supply is correspondingly connected with a plurality of the suckers through a plurality of bidirectional controlled silicons in parallel connection; the control electrode of each bidirectional controlled silicon is correspondingly connected with a plurality of output pins of a singlechip; a voltage sampling circuit is traversed between two electrodes of the input end of the power supply; after a sampling signal is transmitted to a voltage detection circuit through the voltage sampling circuit, is detected, is converted into a digital signal through an A/D convertor; the digital signal is transmitted to the singlechip and is calculated through the singlechip to give a control signal for the corresponding control electrode of the bidirectional controlled silicon so as to control the conduction of the corresponding bidirectional controlled silicon and change the effective turn number of the primary side of the transformer in order that the secondary side of the transformer outputs stable voltage; and the secondary side of the transformer is connected with the output end of a power inserter. The intelligent power supply can be used as the power supply of a cable television network and has wide voltage stabilizing range, low construction cost, high efficiency, no noise, the output of pure sine wave and no waveform distortion.

The invention relates to the technical field of electric appliance detection and discloses a testing device for a high-capacity direct-current electric appliance. The testing device for the high-capacity direct-current electric appliance comprises a rectifier transformer T1, a rectifier D, an accompany test sample breaker QF2, an accompany test sample contactor KM1, a tested object X1 and a direct-current speed regulator A. According to the testing device for the high-capacity direct-current electric appliance, thyristors are adopted by the rectifier D to serve as rectification devices, voltage can be smoothly regulated to the maximum value from zero, and the voltage regulation range of the testing device for the high-capacity direct-current electric appliance is widened; control and protection are achieved according to the current of each thyristor, both the safety and the reliability of the testing device are improved, and the service life of the testing device is prolonged; due to the fact that the direct-current speed regulator A is adopted, digital control over a direct-current power supply is achieved, regulation can be conducted on site through a potential regulator B3, regulation can also be conducted through a remote computer, and thus voltage regulation can be achieved rapidly and conveniently through the testing device; the testing device can be used for detection testing of electric appliances on the voltage grade of 2KV-4KV.

The invention relates to a dual-frequency universal power transformer. The power transformer comprises high-voltage coils, low-voltage coils and voltage-regulating coils, wherein the high-voltage coils, the low-voltage coils and the voltage-regulating coils are correspondingly arranged on the same iron core. The high-voltage coils are at least divided into two parts of coils arrayed at intervals in the axial direction of the iron core, and all the parts of coils of the high-voltage coils are connected in parallel or in series; all parts, corresponding to the high-voltage coils, of the voltage-regulating coils are split and arrayed at intervals and connected in series in a one-to-one correspondence mode. Preferably, the section areas of the wire diameters of voltage-regulating sections in the voltage-regulating coils are sequentially reduced gradually according to the sequence that the voltage-regulating sections are connected into the high-voltage coils in series. The high-voltage coils and the corresponding coils are split and arranged at intervals, and series connection or parallel connection adjustment is used for controlling matching, so that multiple operation modes are combined; the more the high-voltage coils and the corresponding voltage-regulating coils are separated, the more the operation modes can be provided by the power transformer, so that the power transformer can be suitable for a very wide voltage regulating range.

The invention discloses a high-frequency switch rectifying power supply with wide-range direct current voltage output characteristic, which comprises a rectifying bridge, a direct current bus, a high-frequency switching tube, a high-frequency transformer, a high-frequency rectifying tube and a high-frequency switching tube controller, wherein the alternating current is rectified by the rectifying bridge and then is connected to the direct current bus; the voltage on the direct current bus is inversed by the high-frequency switching tube; the inversed alternating current voltage is connected to the high-frequency transformer, transformed by the high-frequency transformer and finally rectified by the high-frequency rectifying tube to output direct current electrical energy; the rectifying bridge is a controllable transistor rectifying bridge and is provided with a corresponding transistor controller; the transistor controller adjusts the transistor rectifying bridge which inputs rectified current by adjusting the phase control angle of the transistor to change the rectified voltage output to the direct current bus so as to finish coarse adjustment; the high-frequency switching tube controller adjusts the high-frequency switching tube by adjusting the duty ratio so as to finish fine adjustment; and the coarse adjustment and the fine adjustment are matched so that the high-frequency switching tube, the high-frequency transformer and the high-frequency rectifying tube work in a state of large duty ratio all the time.

Core and winding assemblies in constant magnetic flux and variable magnetic flux are setup in the disclosed transformer. There are common winding, excitation winding (1) and regulating winding in the former core and winding assembly, and there are series winding and excitation winding (2) in the latter core and winding assembly. The said common winding is cascaded to series winding. The excitation winding (1), excitation winding (2) and regulating winding are connected in series. Changing connected number of turns between excitation winding (2) and regulating winding or direction of magnetic field can change voltage output from transformer. Comparing with single core and winding assemblies of variac, the disclosed transformer possesses advantages of large capacity and high ability of anti vibration potential.

The invention discloses a voltage regulation method and device for a radial power distribution network, and belongs to the field of power systems, and the method comprises the steps: building a voltage regulation model of the whole radial power distribution network through a mathematical programming model, and setting a voltage regulation target according to the electric power physical principle of the power distribution network, wherein the voltage regulation target comprises obtaining a minimum reactive power output cost function and a minimum reactive power deviation penalty; decomposing the task according to the structure based on a voltage regulation module to obtain a sub-problem, solving the sub-problem by using an interior point method, and implementing the solution of the sub-problem; and establishing a random asynchronous optimization mechanism to optimize the sub-problems and start calculation of each node, wherein the calculation result of each node is used for updating reactive power injection of the distributed generator set on the scheduling bus so as to perform voltage regulation on the radial power distribution network. The voltage regulation method is low in costand can enhance the robustness of the voltage of the power distribution network, so that the change of the topological structure of the power distribution network has toughness and the voltage regulation range is wider.

The invention provides a microgrid grid-connected regulation method, which comprises the steps that a voltage division module is arranged between a microgrid power supply and a microgrid alternating current bus, the voltage division module comprises a microgrid switch and a voltage division resistor which is connected with the microgrid switch in parallel and has an adjustable resistance value, and the microgrid switch is respectively connected with the microgrid power supply and the microgrid alternating current bus; an energy storage module is arranged, the charging end of the energy storagemodule is connected with the microgrid power supply, and the discharging end is connected with the microgrid alternating-current bus; during grid-connected adjustment, the working states of the voltage division module and the energy storage module are adjusted according to a difference value between the main grid alternating-current bus voltage and the micro-grid alternating-current bus voltage until the main grid alternating-current bus voltage is consistent with the micro-grid alternating-current bus voltage, and the grid-connected point switch is closed. According to the invention, the voltage regulation range of the microgrid alternating-current bus is expanded, and the voltage regulation of the microgrid alternating-current bus is ensured to be flexible and reliable. Before grid connection, the voltage of the microgrid alternating-current bus is consistent with that of the main grid alternating-current bus, so that the voltage disturbance on the main grid alternating-current busduring grid connection is reduced.

The invention relates to an energy simulation system and method and electronic equipment. The system comprises a rectification module, an isolation module, an inverter, a sampling module, a control module, a driving module and a power supply module, the rectification module is connected with the input end of the inverter through the isolation module. Wherein the input end of the sampling module isconnected with the output end of the isolation module, the output end of the sampling module is connected with the input end of the control module, the output end of the control module is connected with the input end of the driving module, the output end of the driving module is connected with the isolation module, and the power module is connected with the driving module and the control module.According to the invention, the isolated passive clamp phase-shifting full-bridge circuit is used as a main circuit, so that high-power operation and a wide voltage regulation range can be realized, electrical isolation protection of the inverter is realized, and the safety performance of the system is enhanced. And a table look-up mode is adopted as a photovoltaic characteristic curve simulationmode, so that the quick responsiveness of simulating the photovoltaic characteristic curve is improved, and a large amount of storage space does not need to be occupied.