CN103311895B - A kind of converter control system less voltage protector and system - Google Patents
A kind of converter control system less voltage protector and system Download PDFInfo
- Publication number
- CN103311895B CN103311895B CN201310204237.7A CN201310204237A CN103311895B CN 103311895 B CN103311895 B CN 103311895B CN 201310204237 A CN201310204237 A CN 201310204237A CN 103311895 B CN103311895 B CN 103311895B
- Authority
- CN
- China
- Prior art keywords
- voltage
- input power
- switching tube
- resistance
- current transformer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The invention provides a kind of converter control system less voltage protector and system, described device comprises first, second energy-storage units and low-voltage protection unit; When the first energy-storage units charged state, charged by input power, when discharge condition, power to current transformer control module; When the second energy-storage units charged state, charged by input power, when discharge condition, power to switching tube driver; Sampling to the voltage of input power in low-voltage protection unit, if the voltage after sampling is less than the first reference voltage, sends under-voltage locking signal to current transformer control module. Known; the first energy-storage units and the second energy-storage units are in the time of discharge condition; the first energy-storage units is powered to switching tube driver to the power supply of current transformer control module and the second energy-storage units; to make ensureing that current transformer control module sends correct blocking instruction and the correct turn-off protection IGBT of switching tube driver at input power during as under-voltage or dead electricity, thereby make current transformer Safe withdrawing running status.
Description
Technical field
The present invention relates to control field, especially relate to a kind of converter control system less voltage protectorAnd system.
Background technology
Current transformer plays in fields such as industrial frequency conversion field, photovoltaic generation, wind-power electricity generation and power convertersVery important effect. For example, traction convertor, as the traction power equipment of electric locomotive, is called" heart " of locomotive, EMUs is important marks of weighing a national railway transportation equipment technical meritOne of will. Can traction convertor safe and highly efficient operation, is the key of the efficient operation of train safe.
Current transformer comprises converter module, current transformer control module etc., and wherein converter module comprises switchThe switching tubes such as pipe driver and IGBT, switching tube driver is used for driving the switching tubes such as IGBT, unsteady flowDevice control module is for controlling current transformer.
Wherein, formed current transformer by the switching tube driver in current transformer control module and converter moduleControl system, at present, conventionally by special input power to converter control system, i.e. current transformer controlSwitching tube driver power supply in unit and converter module. When this input power undesired (under-voltage orPerson's dead electricity) time, can make current transformer control module working state abnormal, thereby cause current transformer to loseControl, also can make the switching tube driver in converter module cannot drive IGBT (insulated gate pair simultaneouslyBipolar transistor) etc. switching tube, lose the ability of brachium pontis, short circuit and overcurrent protection of blockade, and these are allThe safety of serious harm current transformer.
For ensureing that current transformer can Safe withdrawing operation in the time that the input power of converter control system is undesiredState, in the prior art, current transformer control module self is with the function of under-voltage locking, and changeSwitching tube driver in stream device module is with emergency power supply unit, when current transformer control module detects certainlyWhen the input voltage of body is under-voltage or dead electricity, can start low-voltage protection mechanism, i.e. current transformer controlUnit sends blocking instruction and current transformer control module self fortune to the switching tube driver of converter moduleRow protection mode of operation, the switching tube driver of converter module receives after blocking instruction and carries out and closeThe actions such as IGBT, finally by current transformer control module running protection mode of operation and switching tube driverExecution is closed the actions such as IGBT and is made current transformer Safe withdrawing running status. But, if now input is electricSource under-voltage or dead electricity, cannot maintain the normal power supply of current transformer control module, current transformer control moduleProbably send imperfect or wrong instruction, cause the switching tube driver in converter module can notCorrect execution closed the actions such as IGBT, thereby current transformer can not Safe withdrawing running status.
Summary of the invention
The technical problem that the present invention solves is to provide a kind of converter control system less voltage protectorAnd system, be under-voltage or dead electricity thereby can make at the input power of converter control systemSituation lower time, ensure that current transformer can Safe withdrawing running status.
For this reason, the technical scheme of technical solution problem of the present invention is:
The invention provides a kind of converter control system less voltage protector, described device comprises firstEnergy-storage units, the second energy-storage units and low-voltage protection unit; By input power to current transformer control listSwitching tube driver power supply in unit and converter module;
Described the first energy-storage units is charged by described input power when the charged state, when discharge condition toThe power supply of current transformer control module;
Described the second energy-storage units is charged by described input power when the charged state, when discharge condition toThe power supply of switching tube driver;
Described low-voltage protection unit is used for the voltage of input power to sample, and by the electricity after samplingPress with the first reference voltage and compare, if the voltage after sampling is less than described the first reference voltage, send outSend under-voltage locking signal to described current transformer control module, so that described current transformer control module is receivedRunning protection mode of operation send to block to described switching tube driver and refer to after described under-voltage locking signalOrder.
Preferably, described device also comprises: the first diode and the second diode; Described the first energy storage listUnit comprises the first capacitance group and the first resistance; Described input power has positive output end and negative output terminal;
The positive pole of described the first diode connects the positive output end of input power, and the negative pole of the first diode connectsConnect the first end of the first resistance and the negative pole of the second diode; The second end of described the first resistance connects secondThe first end of anodal and described first capacitance group of diode, the second end of described the first capacitance group connectsThe negative output terminal of input power; The negative pole of described the second diode is connected to current transformer control module;
Described low-voltage protection unit is for sampling and comprise the voltage of input power: described under-voltageProtected location is sampled for the voltage of the positive output end to input power.
Preferably, described the first capacitance group is composed in parallel by least one electrochemical capacitor, in the first capacitance groupThe positive pole of each electrochemical capacitor all connects the positive pole of described the second diode, each electrolysis in the first capacitance groupThe negative pole of electric capacity all connects the negative output terminal of input power.
Preferably, described device also comprises: the 3rd diode and the 4th diode; Described the second energy storage listUnit comprises the second capacitance group and the second resistance; Described input power has positive output end and negative output terminal;
The positive pole of described the 3rd diode connects the positive output end of input power, and the negative pole of the 3rd diode connectsConnect the first end of the second resistance and the negative pole of the 4th diode; The second end of described the second resistance connects the 4thThe first end of anodal and described second capacitance group of diode, the second end of described the second capacitance group connectsThe negative output terminal of input power; The negative pole of described the 4th diode is connected to switching tube driver;
Described low-voltage protection unit is for sampling and comprise the voltage of input power: described under-voltageProtected location is sampled for the voltage of the positive output end to input power.
Preferably, described the second capacitance group is composed in parallel by least one electrochemical capacitor, in the second capacitance groupThe positive pole of each electrochemical capacitor all connects the positive pole of described the 4th diode, each electrolysis in the second capacitance groupThe negative pole of electric capacity all connects the negative output terminal of input power.
Preferably, described low-voltage protection unit comprises: voltage sample unit, voltage comparison unit, openGuan Guan and relay; Described voltage sample unit is used for the voltage of described input power to sample,Described voltage comparison unit is for entering the voltage after described voltage sample unit sampling and the first reference voltageRow compares, if the voltage after sampling is less than described the first reference voltage, voltage comparison unit transmit buttonPipe controls signal to described switching tube; Described switch controlled signal is for controlling the conducting of described switching tubeState;
Described relay and described switching tube are arranged in the same circuit, and described relay is used for according to switching tubeConducting state judge whether transmit button pipe controls signal to described switching tube to described voltage comparison unit,If so, send under-voltage locking signal to described current transformer control module.
Preferably, described input power has positive output end and negative output terminal;
Described voltage sample unit comprises the 3rd resistance and the 4th resistance; Described the 3rd resistance and the described the 4thAfter resistance series connection, be connected between the positive output end and negative output terminal of input power described the 3rd resistance and theNode between four resistance is the output of described voltage sample unit.
Preferably, described input power has positive output end and negative output terminal;
Described voltage comparison unit comprise the first voltage comparator, second voltage comparator, the 5th resistance,The 6th resistance and the 7th resistance; The first input end of described the first voltage comparator connects by the 5th resistanceTo the output of described voltage sample unit, the second input of described the first voltage comparator connects firstReference voltage; The first input end of described second voltage comparator connects the first voltage ratio by the 6th resistanceCompared with the output of device, the second input of described second voltage comparator connects the second reference voltage, described inThe output of second voltage comparator connects described switching tube by the 7th resistance.
Preferably, described switching tube is metal-oxide-semiconductor, and the output of described voltage comparison unit connects described MOSThe grid of pipe; The control end of the source electrode of described metal-oxide-semiconductor and drain electrode, described relay is connected on described inputBetween the positive output end and negative output terminal of power supply, the controlled terminal of described relay connects described current transformer controlUnit processed.
Preferably, described low-voltage protection unit also comprises the 8th resistance and light emitting diode of series connection, instituteWhile stating light emitting diode for described switching tube conducting, described lumination of light emitting diode.
Preferably, described device also comprises common mode filtering circuit, described in described common mode filtering circuit is used for inciting somebody to actionThe voltage of input power carries out exporting opening in current transformer control module, converter module to after common mode filteringClose pipe driver, the first energy-storage units and the second energy-storage units.
Preferably, described device also comprises surge protection circuit, and described surge protection circuit is used for common modeThe voltage of wave filter output carries out surge protection, and by the Voltage-output after surge protection to current transformer controlSwitching tube driver, the first energy-storage units and the second energy-storage units in unit, converter module.
The present invention also provides a kind of converter control system low-voltage protection system, described low-voltage protectionSystem comprise switching tube driver in input power, current transformer control module, converter module andAbove-mentioned any converter control system less voltage protector;
Described current transformer control module and described switching tube driver are powered by described input power;
Described current transformer control module receive after described under-voltage locking signal running protection mode of operation and toDescribed switching tube driver sends blocking instruction;
Described switching tube driver turn-offs the switching tube in converter module after receiving blocking instruction. According toTechnique scheme is known, and low-voltage protection unit is by voltage and first benchmark of the input power after samplingVoltage compares, and when the voltage after sampling is less than the first reference voltage, namely input power is in owingWhen voltage or power failure state, send under-voltage locking signal to current transformer control module, current transformer control listUnit learns that according to under-voltage locking signal input power is in under-voltage or power failure state, now running protection workOperation mode, and send blocking instruction so that switching tube is driven to the switching tube driver in converter moduleDevice receives and carries out the switching tube such as IGBT that turn-offs converter module after blocking instruction. Meanwhile, the first energy storageUnit and the second energy-storage units, in the time of charged state, are charged by input power, and when the first energy-storage unitsWith the second energy-storage units when the discharge condition, the first energy-storage units to the power supply of current transformer control module andThe second energy-storage units is to switching tube driver power supply, has during as under-voltage or dead electricity making at input powerThereby enough electric energy ensure current transformer control module and send correct blocking instruction, and have enough electricityCan ensure that switching tube driver turn-offs in time in the time of the blocking instruction receiving from current transformer control moduleThe switching tubes such as IGBT, thus make the input electricity of current transformer at current transformer control module and switching tube driverSource is can Safe withdrawing running status in the situation of under-voltage or dead electricity.
Brief description of the drawings
Fig. 1 is a specific embodiment of converter control system less voltage protector provided by the inventionStructural representation;
Fig. 2 is a kind of connected mode of the first energy-storage units and input power and current transformer control module;
Fig. 3 is a kind of connected mode of the second energy-storage units and input power and switching tube driver;
Fig. 4 is that the first energy-storage units is while being resistance and electrochemical capacitor in parallel and input power and current transformer controlA kind of connected mode of unit processed;
Fig. 5 be the second energy-storage units while being resistance and electrochemical capacitor in parallel and input power and switching tube driveA kind of connected mode of moving device;
Fig. 6 is the preferred structural representation of the one of low-voltage protection unit;
Fig. 7 is that a kind of physical circuit of the low-voltage protection unit shown in Fig. 6 connects;
Fig. 8 is that the another kind of physical circuit of the low-voltage protection unit shown in Fig. 6 connects;
Fig. 9 is another specific embodiment of converter control system less voltage protector provided by the inventionStructural representation;
Figure 10 is another specific embodiment of converter control system less voltage protector provided by the inventionStructural representation;
Figure 11 is the structural representation of common-mode filter and surge protection circuit in specific embodiment shown in Figure 10Figure;
Figure 12 is the knot of the specific embodiment of converter control system low-voltage protection system provided by the inventionStructure schematic diagram.
Detailed description of the invention
Refer to Fig. 1, the invention provides a kind of concrete reality of converter control system less voltage protectorExecute example, in this embodiment, described device comprise the first energy-storage units 101, the second energy-storage units 102 andLow-voltage protection unit 103.
By input power 104 to the switching tube driver in current transformer control module 105 and converter module106 power supplies. Wherein, input power can be to drive by the electric power source pair of module switching tube in converter moduleDevice is powered. Input power is the power supply of powering to converter control system to specially.
The first energy-storage units 101 is for being charged by input power 104 when the charged state, in discharge conditionIn time, powers to current transformer control module 105, to provide enough electric energy to ensure current transformer control module 105 energyEnough send correct blocking instruction to switching tube driver 106. Particularly, when input power is normal shapeWhen state, the first energy-storage units 101, in charging poised state, is under-voltage or dead electricity and work as input powerWhen state, the first energy-storage units 101 is in discharge condition. The first energy-storage units 101 is for having energy storage meritThe circuit of energy, specifically can be made up of electric capacity and resistance.
The second energy-storage units 102 is for being charged by input power 104 when the charged state, in discharge conditionIn time, powers to switching tube driver 106, to provide enough electric energy to ensure that switching tube driver 106 canReceiving after blocking instruction the switching tubes such as the IGBT that turn-offs in time in converter module. Particularly, when defeatedWhen entering power supply and being normal condition, the second energy-storage units is in charging poised state, and when input power is for owingWhen voltage or power failure state, the second energy-storage units is in discharge condition. The second energy-storage units 102 is for havingThe circuit of energy-storage function, specifically can be made up of electric capacity and resistance.
In general, need certain guard time (example when current transformer control module running protection mode of operationAs 40ms, hereinafter to be referred as " guard time "), the first energy-storage units 101 and the second energy-storage units 102Need to there be enough capacitances to make current transformer control module 105 and switching tube driver 106 in the time of protectionInterior (for example, in the time of 40ms) can maintain normal work.
Low-voltage protection unit 103 is for the voltage of input power 104 is sampled, and after samplingVoltage and the first reference voltage compare, if sampling after voltage be less than described the first reference voltage,Judge that the voltage of input power now, in under-voltage or power failure state, sends under-voltage locking signal to instituteState current transformer control module 105, to make described current transformer control module 105 receive described under-voltage lockingRunning protection mode of operation send blocking instruction to described switching tube driver 106 after signal. Work as switchPipe driver 106 can execution be closed the actions such as IGBT to realize converter module quilt after receiving blocking instructionBlock protection. Here, the first reference voltage is whether to demarcate magnitude of voltage after input power sampling for owing electricityThe nominal voltage of pressure or power failure state. Especially, low-voltage protection unit 103 can also be used for when samplingAfter voltage be not less than described the first reference voltage, now the voltage of input power is in normal condition,Send voltage normal signal to described current transformer control module 105, to make described current transformer control module105 receive and start normal mode of operation after described voltage normal signal and to described switching tube driver 106Send deblocking instruction. After switching tube driver 106 receives deblocking instruction, switching tube driver 106 opensMoving normal mode of operation, carries out actions such as opening IGBT.
Here what deserves to be explained is, and in prior art, current transformer control module self with under-voltageThe input voltage that lock function can only be realized detection self is under-voltage or dead electricity, and the invention processCan directly sample to input power in low-voltage protection unit 103 in example, also can to inputThe idiostatic sampled point of power supply is sampled, and the sampling of low-voltage protection unit 103 to input powerPoint can not be positioned in the discharge paths of the first energy-storage units, thereby ensures being sampled as of low-voltage protection unitThe real voltage of input power, instead of the discharge voltage of the first energy-storage units, thereby judgement accuratelyWhether go out input power is under-voltage or power failure state.
Known according to technique scheme, low-voltage protection unit 103 is by the electricity of the input power after samplingPress with the first reference voltage and compare, when the voltage after sampling is less than the first reference voltage, namely defeatedEnter power supply 104 in the time of under-voltage or power failure state, send under-voltage locking signal to current transformer control listUnit 105, current transformer control module 105 learns that according to under-voltage locking signal input power is in under-voltage or mistakeElectricity condition, now running protection mode of operation, and send blocking instruction to switching tube driver 106 so thatSwitching tube driver is carried out the switching tube such as IGBT that turn-offs converter module. Meanwhile, the first energy-storage units101 and second energy-storage units 102 in the time of charged state, charged by input power 104, the first energy storage listUnit 101 and the second energy-storage units 102 are in the time of discharge condition, and the first energy-storage units 101 is to current transformer controlUnit 105 processed powers and the second energy-storage units 102 is powered to switching tube driver 106, input power104 while being under-voltage or power failure state, when the voltage after sampling is less than the first reference voltage, and the first energy storageUnit and the second energy-storage units be in discharge condition, thereby to make enough electric energy ensure current transformer controlUnit 105 processed sends correct blocking instruction, thereby and has enough electric energy to ensure switching tube driver106 carry out and close the actions such as IGBT in the time receiving blocking instruction, thereby make at converter control systemInput power can control current transformer Safe withdrawing running status while being under-voltage or power failure state.
Introduce respectively the first energy-storage units and the in the time that input power has positive and negative two outputs belowThe connected mode of two energy-storage units and input power.
As shown in Figure 2, input power can have two outputs, i.e. positive output end and negative output terminal. ThisTime converter control system less voltage protector in the embodiment shown in Fig. 1 can also comprise: two utmost pointsPipe D1 and diode D2. The first energy-storage units comprises the first capacitance group 201 and resistance R 1. Wherein, twoThe positive pole of utmost point pipe D1 connects the positive output end of input power 104, the negative pole contact resistance R1 of diode D1First end and the negative pole of diode D2, the second end of resistance R 1 connects the anodal of diode D2 and theThe first end of one capacitance group 201, the second end of the first capacitance group 201 connects the negative defeated of input power 104Go out end, the negative pole of diode D1 is connected to current transformer control module 105. In input power under-voltage or mistakeWhen electricity condition, the capacitance of the first capacitance group 201 has ensured that current transformer control module 105 has enough electricityEnergy running protection mode of operation also sends correct blocking instruction to switching tube driver 106. Wherein, electricityResistance R1 is the charging resistor of the first capacitance group 201, the electricity while charging to the first capacitance group 201 for limitingStream, if there is no resistance R 1, can cause charging current excessive and burn out the first capacitance group 201. Resistance R 1Can also one or more resistance in parallel. Quantity and the resistance of the resistance of the resistance of resistance R 1 and parallel connectionValue charging current according to the actual requirements determines. Can find out, in the structure shown in Fig. 2, whenWhen input power is normal, input power is directly powered to current transformer control module by diode D1, andCharge to the first capacitance group 201 by diode D1 and resistance R 1, when input power in under-voltage orWhen power failure state, the first capacitance group 201 is powered to current transformer control module by diode D2. By twoUtmost point pipe D1 and D2 have limited the flow direction of electric current. The first capacitance group 201 can be by the electricity of multiple parallel connectionsHold composition, now all right resistance in parallel of the first capacitance group is as discharge resistance.
Low-voltage protection unit 103 is for sampling and comprise the voltage of input power: under-voltage is protectedProtecting unit 103 samples for the voltage of the positive output end to input power.
As shown in Figure 3, input power can have two outputs, i.e. positive output end and negative output terminal. ThisTime converter control system less voltage protector in the embodiment shown in Fig. 1 can also comprise: two utmost pointsPipe D3 and diode D4. The second energy-storage units comprises the second capacitance group 202 and resistance R 2. Wherein, twoThe positive pole of utmost point pipe D3 connects the positive output end of input power 104, the negative pole contact resistance R2 of diode D3First end and the negative pole of diode D4, the second end of resistance R 2 connects the anodal of diode D4 and theThe first end of two capacitance group 202, the second end of the second capacitance group 202 connects the negative defeated of input power 104Go out end, the negative pole of diode D4 is connected to the switching tube driver 106 in converter module. At input electricityWhen source under-voltage or power failure state, the capacitance of the second capacitance group 202 has ensured switching tube driver 106After receiving blocking instruction, there are enough electric energy to carry out the action of closing the switching tubes such as IGBT. Wherein, resistanceR2 is the charging resistor of the second capacitance group 202, the electric current while charging to the second capacitance group 202 for limiting,If there is no resistance R 2, can cause charging current excessive and burn out the second capacitance group 202. Resistance R 2 also canWith the one or more resistance of parallel connection. Quantity and the resistance root of the resistance of the resistance of resistance R 2 and parallel connectionCharging current according to actual demand determines. Can find out, in the structure shown in Fig. 3, work as inputWhen power supply is normal, input power is directly powered to switching tube driver by diode D3, and by twoUtmost point pipe D3 and resistance R 2 are charged to the second capacitance group 202, when input power is in under-voltage or dead electricity shapeWhen state, the second capacitance group 202 is powered to switching tube driver by diode D4. By diode D3Limit the flow direction of electric current with D4. The second capacitance group 202 can be made up of the electric capacity of multiple parallel connections.
Low-voltage protection unit 103 is for sampling and comprise the voltage of input power: under-voltage is protectedProtect unit 103 for the voltage of input power positive output end is sampled.
Wherein, especially, the first capacitance group 201 in Fig. 2 is composed in parallel by least one electrochemical capacitor,Now in the first capacitance group 201, the positive pole of each electrochemical capacitor all connects the positive pole of diode D2, the first electricityIn appearance group 201, the negative pole of each electrochemical capacitor all connects the negative output terminal of input power. Example as shown in Figure 4,The first capacitance group is composed in parallel by 6 electrochemical capacitors, and wherein the positive pole of each electrochemical capacitor all connects two utmost pointsThe positive pole of pipe D2, the negative pole of each electrochemical capacitor all connects the negative output terminal of input power, as shown in Figure 4,The all right parallel resistance R9 of the first capacitance group is as discharge resistance. The capacitance of the first capacitance group can be1800uF, can realize at the power of the input power 104 of converter control system is 260W,Maintain the working time of current transformer control module 200ms left and right. The second capacitance group in Fig. 3 also can be byAt least one electrochemical capacitor composes in parallel, and now in the second capacitance group, the positive pole of each electrochemical capacitor all connectsThe positive pole of diode D4, in the second capacitance group, the negative pole of each electrochemical capacitor all connects the negative defeated of input powerGo out end. As shown in Figure 5, the second capacitance group is composed in parallel by 6 electrochemical capacitors example, wherein the second electric capacityIn group, the positive pole of each electrochemical capacitor all connects the positive pole of diode D4, each electrolysis electricity in the second capacitance groupThe negative pole holding all connects the negative output terminal of input power, and as shown in Figure 4, the second capacitance group can also be in parallelResistance R 10 is as discharge resistance.
Particularly, as shown in Figure 6, low-voltage protection unit 103 can comprise: voltage sample unit 1031,Voltage comparison unit 1032, switching tube 1033 and relay 1034. Voltage sample unit 1031 forVoltage to input power 104 is sampled, and voltage comparison unit 1032 is for by voltage sample unitVoltage and the first reference voltage after 1031 samplings compare, if the voltage after sampling is less than described firstReference voltage, illustrates that now input power is in under-voltage or power failure state, voltage comparison unit 1032Transmit button pipe controls signal to described switching tube 1033, and switch controlled signal is used for controlling described switchThe conducting state of pipe 1033 is conducting or shutoff. Relay 1034 is positioned at same with switching tube 1033In one closed-loop path, relay 1034 is for judging described voltage according to the conducting state of switching tube 1033Whether transmit button pipe controls signal to described switching tube 1033 to comparing unit, if so, sends under-voltageLocking signal is to described current transformer control module 105.
In low-voltage protection unit 103, because voltage comparison unit 1032 can transmit button management and control systemSignal is to switching tube 1033, the therefore control of the output connecting valve pipe 1033 of voltage comparison unit 1032System end. Switching tube 1033 is connected in same circuit with the control end of relay 1034. That is to say,Voltage comparison unit 1032 can be by voltage and the first benchmark electricity after 1031 samplings of voltage sample unitThe conducting state of comparative result gauge tap pipe of pressing, and the conducting state of switching tube 1033 can be controlled and continuesThe conducting state of the control end of electrical equipment 1034, thereby the conducting shape of the controlled terminal of control relay 1034State. Can send under-voltage locking signal to current transformer control module 105 according to relay 1034, known changeThe conducting state of stream device control module 105 controlled terminals by detection relay 1034 judges whether to receiveUnder-voltage locking signal. For example, when comparing voltage sample unit 1031, voltage comparison unit 1032 samplesAfter voltage while being less than the first reference voltage, gauge tap pipe 1033 disconnects, switching tube 1033 with continueThe control end of electrical equipment 1034 is connected in the same circuit, and now the control end of relay 1034 does not have electric currentPass through, the controlled terminal of relay 1034 opens circuit, and current transformer control module 105 detects relay 1034The off state of controlled terminal time, think to have received under-voltage locking signal, known now inputPower supply is under-voltage or power failure state.
Introduce respectively voltage sample unit 1031, voltage in the low-voltage protection unit shown in Fig. 6 belowThe concrete structure of comparing unit 1032, switching tube 1033.
The concrete structure of voltage sample unit 1031 can as shown in Figure 7, comprise: resistance R 3 and resistanceR4. And input power has two outputs, i.e. positive output end and negative output terminal. Wherein, resistance R 3And after resistance R 4 series connection, be connected between the positive output end and negative output terminal of input power 104 resistance R 3With the intermediate node of resistance R 4 output as voltage sample unit. Now after voltage sample unit samplingMagnitude of voltage V, the magnitude of voltage of the output of voltage sample unit is:Wherein UDCForThe DC voltage value of input power. Can realize regulation voltage and adopt by resistance that R3 is different with R4 is setThe ratio of the magnitude of voltage after sample unit sampling and the voltage of input power. Here voltage sample unit 1031,Can also adopt other structure, only need there is the function that can sample to voltage.
The concrete structure of voltage comparison unit 1032 can as shown in Figure 7, comprise: resistance R 5, resistanceR6, resistance R 7, the first voltage comparator AMP1 and second voltage comparator AMP2. Wherein, the first electricityThe in-phase input end of pressure comparator AMP1 is connected to the output of voltage sample unit 1031 by resistance R 5,What deserves to be explained is, now voltage sample unit can be other structures beyond Fig. 7 or Fig. 7. TheThe inverting input of one voltage comparator AMP1 connects the first reference voltage, the first voltage comparator AMP1Output connect the in-phase input end of second voltage comparator AMP2 by resistance R 6. The first voltage ratioConnect the in-phase input end of second voltage comparator AMP2 by resistance R 6 compared with the output of device AMP1, theThe inverting input of two voltage comparator AMP2 connects the second reference voltage, second voltage comparator AMP2Output by resistance R 7 connecting valve pipes. Wherein, the first voltage comparator AMP1 inputs at homophaseWhen the voltage of end is greater than the voltage of reversed-phase output, the magnitude of voltage of output is greater than the second reference voltage. FirstVoltage comparator AMP1 in the time that the voltage of in-phase input end is less than the voltage of reversed-phase output, the voltage of outputValue is less than the second reference voltage.
Therefore, when the magnitude of voltage of the in-phase input end of the first voltage comparator AMP1 is greater than inverting inputWhen magnitude of voltage, now input power is normal condition, and the first voltage comparator AMP1 output high level, shouldThe magnitude of voltage of high level is greater than the second reference voltage, therefore second voltage comparator AMP2 output high level.In the time that the magnitude of voltage of the in-phase input end of the first voltage comparator AMP1 is less than the magnitude of voltage of inverting input,Now input power is under-voltage or power failure state, the first voltage comparator AMP1 output low level, and this is lowThe magnitude of voltage of level is less than the second reference voltage, therefore second voltage comparator AMP2 output low level.
In fact, the first voltage comparator can be also by in-phase input end connect the first reference voltage andInverting input connects the output of voltage sample unit, and second voltage comparator can be also defeated by homophaseEnter end and connect the second reference voltage and inverting input contact resistance R6, the present invention does not add restriction to this.Wherein, the first reference voltage can be provided by a resistance series connection bleeder circuit, and the second reference voltage canProvided by three ends parallel voltage-stabilizing diode able to programme. Resistance R 5 is inputs of the first voltage comparator AMP1End resistance, resistance R 6 is input pickup resistance and first voltage comparator AMP1 of second voltage comparator AMP2Output resistance. In addition, the first voltage comparator shown in Fig. 7 and second voltage comparator can be byAmplifier composition, now response speed is very fast, conventionally can reach microsecond rank.
Can find out, the voltage comparison unit in Fig. 7 has adopted two-layer configuration, than primary structure toolHave higher stability and gain amplifier multiple, ability anti-interference and inhibition output saturation is stronger. AndIn practical application, voltage comparison unit adopts structure more than two-stage conventionally, and the present invention is not construed as limiting this.
Switching tube 1033 can have for metal-oxide-semiconductor, triode etc. the device of switching function. For example Fig. 7 instituteShow, switching tube 1033 is metal-oxide-semiconductor M1, and the grid of metal-oxide-semiconductor M1 connects the defeated of voltage comparison unit 1032Go out end, the source electrode of metal-oxide-semiconductor M1 and drain electrode are connected on the first end of control end of relay and input powerBetween negative output terminal, now the second end of the control end of relay 1034 connects the just defeated of input power 104Go out end. In fact, only need meet the source electrode of metal-oxide-semiconductor M1 and the series connection of the control end of drain electrode and relayBetween the positive output end and negative output terminal of input power. Here, the controlled terminal of relay connectsCurrent transformer control module 105.
Preferably, can also in the low-voltage protection unit 103 shown in Fig. 6, connect a resistance and send outOptical diode, and in the time of switching tube conducting, luminous thereby light emitting diode is also connected, thus can rootLearn the conducting state of switching tube according to the luminous situation of light emitting diode, further whether learn input powerUnder-voltage or power failure state. Example as shown in Figure 8, at the control end of relay, metal-oxide-semiconductor M1 andIn the positive output end of input power and the loop of negative output terminal, series resistance R8 and light emitting diode D5, canTo find out, in the time that the voltage after 1031 samplings of voltage sample unit is greater than the first reference voltage, second voltageComparator AMP2 exports high level, metal-oxide-semiconductor M1 conducting, and now diode D5 is luminous. Work as voltage sampleWhen voltage after unit 1031 samplings is less than the first reference voltage, second voltage comparator AMP2 output is lowLevel, metal-oxide-semiconductor M1 turn-offs, and now diode D5 is not luminous.
Converter control system less voltage protector in the present invention, can be used in traction convertor, workIndustry frequency converter and frequency converter module, photovoltaic generator, wind-driven generator, electric automobile and power converterIn multiple systems, the present invention is not limited this.
Introduce one of a converter control system less voltage protector provided by the invention below preferablyEmbodiment. In this preferred embodiment, be illustrated as an example of traction convertor example. At traction convertorIn, current transformer control module is specially traction control unit, and switching tube driver is specifically IGBT driver.
Refer to Fig. 9, the present invention also provides another of converter control system less voltage protector concreteEmbodiment, in this embodiment, described device comprise the first energy-storage units 101, the second energy-storage units 102,Low-voltage protection unit 103, diode D1, diode D2, diode D3 and diode D4. InputPower supply has two outputs, i.e. positive output end and negative output terminal. Described device is for traction convertor.
By input power 104 to the IGBT driver 902 in traction control unit 901 and converter modulePower supply.
As shown in Figure 4, the first energy-storage units 101 comprises the first capacitance group and resistance R 1, resistance R 9. TheOne capacitance group comprises 6 electrochemical capacitors in parallel. Wherein the positive pole of each electrochemical capacitor all connects diodeThe positive pole of D2, the negative pole of each electrochemical capacitor all connects the negative output terminal of input power 104. Diode D1Positive pole connect the positive output end of input power 104, first of the negative pole contact resistance R1 of diode D1The negative pole of end and diode D2, the second end of resistance R 1 connects the positive pole of diode D2, diode D1Negative pole be connected to traction control unit 901. Each electrochemical capacitor in resistance R 9 and the first capacitance group alsoConnection.
As shown in Figure 5, the second energy-storage units 102 comprises the second capacitance group and resistance R 2, resistance R 10,The second capacitance group comprises 6 electrochemical capacitors in parallel. Wherein the positive pole of each electrochemical capacitor all connects two utmost pointsThe positive pole of pipe D4, the negative pole of each electrochemical capacitor all connects the negative output terminal of input power. Diode D3Positive pole connect the positive output end of input power 104, first of the negative pole contact resistance R2 of diode D3The negative pole of end and diode D4, the second end of resistance R 2 connects the positive pole of diode D4, diode D4Negative pole be connected to the IGBT driver 902 in converter module. In resistance R 10 and the second capacitance groupEach electrochemical capacitor parallel connection.
As shown in Figure 8, low-voltage protection unit 103 comprises: voltage sample unit and voltage comparison unit,Metal-oxide-semiconductor M1, relay 1034, light emitting diode D5 and resistance R 8. Voltage sample unit comprises electricityResistance R3 and resistance R 4, voltage comparison unit comprise resistance R 5, resistance R 6, resistance R 7, the first voltage ratioCompared with device AMP1 and second voltage comparator AMP2.
Wherein, after resistance R 3 and resistance R 4 series connection, be connected to the positive output end of input power 104 and bear defeatedGo out between end, the in-phase input end of the first voltage comparator AMP1 is connected to resistance R 3 Hes by resistance R 5Between resistance R 4, the inverting input of the first voltage comparator AMP1 connects the first reference voltage of 2.5V,The first end of the output contact resistance R6 of the first voltage comparator, the second end of resistance R 6 connects secondThe in-phase input end of voltage comparator AMP2, the inverting input access 10V of second voltage comparator AMP2The second reference voltage, the output of second voltage comparator AMP2 connects metal-oxide-semiconductor M1 by resistance R 7Grid. Between the control end of relay 1034, the source electrode of metal-oxide-semiconductor M1 and drain electrode, resistance R 8, send outThe positive output end of optical diode D5 and input power and negative output terminal form a closed-loop path. Relay1034 controlled terminal is connected with traction control unit.
In the time that the voltage of the in-phase input end of the first voltage comparator AMP1 is less than the first reference voltage, firstThe low level of voltage comparator output 0V, second voltage comparator output low level, metal-oxide-semiconductor M1 disconnects,Therefore the control end of relay opens circuit, and the controlled terminal of relay also opens circuit, and traction control unit 901 is examinedWhen the controlled terminal that measures relay 1034 opens circuit, running protection mode of operation driving to described IGBTMoving device 902 sends blocking instruction. After IGBT driver 902 receives blocking instruction, can carry out and close IGBTBe blocked protection Deng action to realize converter module. When the in-phase input end of the first voltage comparator AMP1Voltage while being greater than the first reference voltage, the high level of the first voltage comparator output 15V, the second electricityPress comparator output high level, metal-oxide-semiconductor M1 closure, the therefore control end closure of relay, relayControlled terminal is also closed, when traction control unit 901 detects the controlled terminal closure of relay 1034,Traction control unit 901 starts normal mode of operation and sends deblocking instruction to described IGBT driver 902.IGBT driver starts normal mode of operation after receiving deblocking instruction.
In fact,, in converter control system less voltage protector provided by the invention, meeting exists conventionallyThe output of input power add filtering or surge protection circuit to the voltage of input power carry out filtering orSurge protection. Be illustrated below by an embodiment. In the following examples still with traction convertorBe illustrated.
Figure 10 is that another of converter control system less voltage protector provided by the invention specifically implementedExample, in this embodiment, described device comprises the first energy-storage units 101, the second energy-storage units 102, owes electricityPress protected location 103, common-mode filter 1001 and surge protection circuit 1002. Described device is for tractionIn current transformer.
Common-mode filter 1001 carries out exporting to after common mode filtering for the voltage that input power 104 is exportedSurge protection circuit 1002, the common mode of surge protection circuit 1002 for common-mode filter 1001 is exportedFiltered voltage carries out surge protection, and by the Voltage-output after surge protection to traction control unit901, IGBT driver 902, the first energy-storage units 101 and the second energy-storage units 102.
The first energy-storage units 101 for when the charged state by input power 104 through common-mode filter and waveGush the voltage charging after holding circuit, in the time of discharge condition, power to traction control unit 901, to provideEnough electric energy ensure that traction control unit can send correct blocking instruction to IGBT driver.
The second energy-storage units 102 for when the charged state by input power 104 through common-mode filter and waveGush the voltage charging after holding circuit, in the time of discharge condition, power to IGBT driver 902, so that foot to be providedEnough electric energy ensures that IGBT driver can carry out and close the actions such as IGBT receiving after blocking instruction.
Low-voltage protection unit 103 for to input power 104 through common-mode filter and surge protection circuitAfter voltage sample, and by sampling after voltage and the first reference voltage compare, if sample afterVoltage be less than described the first reference voltage, now the voltage of input power is in under-voltage or power failure state,Send under-voltage locking signal to described traction control unit 901, to make described traction control unit 901Receive after described under-voltage locking signal running protection mode of operation and send to described IGBT driver 902Blocking instruction. After IGBT driver 902 receives blocking instruction, can carry out close the action such as IGBT withRealize converter module and be blocked protection.
Traction control unit 901 and IGBT driver 902 by input power 104 through common-mode filter and waveGush the power voltage supply after holding circuit.
The structure of common-mode filter 1001 and surge protection circuit 1002 can be as shown in figure 11, common mode filterRipple device 1001 is made up of two common mode inductances on magnetosphere and metal shell. Surge protection circuit1002 can be made up of piezo-resistance R9, R10 and R11, wherein, and after piezo-resistance R9 and R10 series connectionBe connected between two outputs of common-mode filter the intermediate node ground connection of R9 and R10 and connect common mode filterOn the shell of ripple device, piezo-resistance R11 is connected between two outputs of common-mode filter, with R9 andThe series circuit parallel connection of R10, the resistance of R9 and R10 equates. When the input voltage of surge protection circuit isWhen overvoltage surge, the resistance of piezo-resistance R9, R10 and R11 reduces, overvoltage surge by R9,R10 and R11 release energy, thereby have protected late-class circuit. Common-mode filter 1001 and surge protection electricityRoad 1002 can also adopt other structure, and for example, surge protection circuit 1002 can also be protective tubeOr transition diode. Here, can there is no surge protection circuit yet, and only have common-mode filter. ?Now by common-mode filter, the Voltage-output after common mode filtering is driven to traction control unit 901, IGBTDevice 902, the first energy-storage units 101 and the second energy-storage units 102.
Refer to Figure 12, the present invention also provides a kind of tool of converter control system low-voltage protection systemBody embodiment, described low-voltage protection system comprise converter control system less voltage protector 1201,Switching tube driver 106 in input power 104, current transformer control module 105 and converter module.
Wherein, converter control system less voltage protector 1201 as shown in Figure 1, comprises the first energy storageUnit 101, the second energy-storage units 102 and low-voltage protection unit 103.
The first energy-storage units 101 is for being charged by input power 104 when the charged state, in discharge conditionIn time, powers to current transformer control module 105, to provide enough electric energy to ensure that current transformer control module can be toSwitching tube driver sends correct blocking instruction. Particularly, when input power is under-voltage or dead electricity shapeWhen state, the first energy-storage units 101 is in discharge condition, and in the time that input power is normal condition, first stores upEnergy unit 101 is in charging poised state.
The second energy-storage units 102 is for being charged by input power 104 when the charged state, in discharge conditionIn time, powers to switching tube driver 106, to provide enough electric energy to ensure that switching tube driver can connectAfter receiving blocking instruction, carry out actions such as closing IGBT correctly to be blocked protection. Particularly, when input electricityWhen source is under-voltage or power failure state, the second energy-storage units 102 is in discharge condition, when input power isWhen normal condition, the second energy-storage units 102 is in charging poised state.
Low-voltage protection unit 103 is for the voltage of input power 104 is sampled, and after samplingVoltage and the first reference voltage compare, if sampling after voltage be less than described the first reference voltage,Now the voltage of input power, in under-voltage or power failure state, sends under-voltage locking signal to described changeStream device control module 105, to make described current transformer control module 105 receive described under-voltage locking signalRear running protection mode of operation also sends blocking instruction to described switching tube driver 106.
Current transformer control module 105 receives after under-voltage locking signal running protection mode of operation and to switchPipe driver 106 sends blocking instruction.
After receiving blocking instruction, switching tube driver 106 can carry out the IGBT closing in converter moduleBe blocked protection Deng switching tube to realize converter module. Here, the first reference voltage is for demarcating input electricityPress whether the magnitude of voltage after sampling is the nominal voltage of under-voltage or power failure state.
Current transformer control module 105 and switching tube driver 106 are powered by input power 104.
Converter control system less voltage protector 1201 in the present embodiment can also be for the invention providesAny one specific embodiment of converter control system less voltage protector.
The above is only the preferred embodiment of the present invention, it should be pointed out that for the artThose of ordinary skill, under the premise without departing from the principles of the invention, can also make some improvementAnd retouching, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (13)
1. a converter control system less voltage protector, is characterized in that, converter control systemComprise current transformer control module and switching tube driver, described current transformer control module is for entering current transformerRow is controlled; Described device comprises the first energy-storage units, the second energy-storage units and low-voltage protection unit;By the input power of described converter control system to the switch in current transformer control module and converter moduleThe power supply of pipe driver;
Described the first energy-storage units is charged by described input power when the charged state, when discharge condition toThe power supply of current transformer control module;
Described the second energy-storage units is charged by described input power when the charged state, when discharge condition toThe power supply of switching tube driver;
Described low-voltage protection unit is used for the voltage of input power to sample, and by the electricity after samplingPress with the first reference voltage and compare, if the voltage after sampling is less than described the first reference voltage, send outSend under-voltage locking signal to described current transformer control module, so that described current transformer control module is receivedRunning protection mode of operation send to block to described switching tube driver and refer to after described under-voltage locking signalOrder;
Wherein, described the first energy-storage units is connected with described input power, described the first energy-storage units and instituteStating current transformer control module connects; Described the second energy-storage units is connected with described input power, and described secondEnergy-storage units is connected with described switching tube driver; Low-voltage protection unit is connected with described input power,Described low-voltage protection unit is connected with described current transformer control module.
2. device according to claim 1, is characterized in that, described device also comprises: the one or twoUtmost point pipe and the second diode; Described the first energy-storage units comprises the first capacitance group and the first resistance; Described defeatedEnter power supply and there is positive output end and negative output terminal;
The positive pole of described the first diode connects the positive output end of input power, and the negative pole of the first diode connectsConnect the first end of the first resistance and the negative pole of the second diode; The second end of described the first resistance connects secondThe first end of anodal and described first capacitance group of diode, the second end of described the first capacitance group connectsThe negative output terminal of input power; The negative pole of described the second diode is connected to current transformer control module;
Described low-voltage protection unit is for sampling and comprise the voltage of input power: described under-voltageProtected location is sampled for the voltage of the positive output end to input power.
3. device according to claim 2, is characterized in that, described the first capacitance group is by an electricitySeparate electric capacity or at least two electrochemical capacitors and compose in parallel, the positive pole of each electrochemical capacitor in the first capacitance groupAll connect the positive pole of described the second diode, in the first capacitance group, the negative pole of each electrochemical capacitor all connects defeatedEnter the negative output terminal of power supply.
4. device according to claim 1, is characterized in that, described device also comprises: the three or twoUtmost point pipe and the 4th diode; Described the second energy-storage units comprises the second capacitance group and the second resistance; Described defeatedEnter power supply and there is positive output end and negative output terminal;
The positive pole of described the 3rd diode connects the positive output end of input power, and the negative pole of the 3rd diode connectsConnect the first end of the second resistance and the negative pole of the 4th diode; The second end of described the second resistance connects the 4thThe first end of anodal and described second capacitance group of diode, the second end of described the second capacitance group connectsThe negative output terminal of input power; The negative pole of described the 4th diode is connected to switching tube driver;
Described low-voltage protection unit is for sampling and comprise the voltage of input power: described under-voltageProtected location is sampled for the voltage of the positive output end to input power.
5. device according to claim 4, is characterized in that, described the second capacitance group is by least oneIndividual electrochemical capacitor composes in parallel, and in the second capacitance group, the positive pole of each electrochemical capacitor all connects the described the 42The positive pole of utmost point pipe, in the second capacitance group, the negative pole of each electrochemical capacitor all connects the negative output terminal of input power.
6. according to the device described in claim 1 to 5 any one, it is characterized in that described under-voltageProtected location comprises: voltage sample unit, voltage comparison unit, switching tube and relay; Wherein,The input of described voltage sample unit is connected with described input power, and output and described voltage ratio are more singleThe input of unit connects, and the output of described voltage comparison unit is connected with the control end of described switching tube;
Described voltage sample unit is for sampling to the voltage of described input power, and described voltage ratioUnit is for comparing the voltage after described voltage sample unit sampling and the first reference voltage, if adoptVoltage after sample is less than described the first reference voltage, and voltage comparison unit transmit button pipe controls signal toDescribed switching tube; Described switch controlled signal is for controlling the conducting state of described switching tube;
The control end of described relay and described switching tube are connected in the same circuit, and described relay is used forJudge according to the conducting state of switching tube whether transmit button pipe controls signal to institute to described voltage comparison unitState switching tube, if so, send under-voltage locking signal to described current transformer control module.
7. device according to claim 6, is characterized in that, described input power has positive outputEnd and negative output terminal;
Described voltage sample unit comprises the 3rd resistance and the 4th resistance; Described the 3rd resistance and the described the 4thAfter resistance series connection, be connected between the positive output end and negative output terminal of input power described the 3rd resistance and theNode between four resistance is the output of described voltage sample unit.
8. device according to claim 6, is characterized in that, described input power has positive outputEnd and negative output terminal;
Described voltage comparison unit comprise the first voltage comparator, second voltage comparator, the 5th resistance,The 6th resistance and the 7th resistance; The first input end of described the first voltage comparator connects by the 5th resistanceTo the output of described voltage sample unit, the second input of described the first voltage comparator connects firstReference voltage; The first input end of described second voltage comparator connects the first voltage ratio by the 6th resistanceCompared with the output of device, the second input of described second voltage comparator connects the second reference voltage, described inThe output of second voltage comparator connects described switching tube by the 7th resistance.
9. device according to claim 6, is characterized in that, described switching tube is metal-oxide-semiconductor, instituteThe output of stating voltage comparison unit connects the grid of described metal-oxide-semiconductor; The source electrode of described metal-oxide-semiconductor and drain electrode,The control end of described relay is connected between the positive output end and negative output terminal of described input power, described inThe controlled terminal of relay connects described current transformer control module.
10. device according to claim 6, is characterized in that, described low-voltage protection unit alsoComprise the 8th resistance and light emitting diode of series connection, when described light emitting diode is used for described switching tube conducting,Described lumination of light emitting diode;
Wherein, described the 8th resistance and described light emitting diode are connected on control end, the institute of described relayState in the positive output end of switching tube and described input power and the loop of negative output terminal formation.
11. devices according to claim 1, is characterized in that, described device also comprises common mode filterWave circuit, described common mode filtering circuit is for carrying out the voltage of described input power to export after common mode filteringTo switching tube driver, the first energy-storage units and second in current transformer control module, converter moduleEnergy-storage units.
12. devices according to claim 11, is characterized in that, described device also comprises surge guarantorProtection circuit, described surge protection circuit carries out surge protection for the voltage that common-mode filter is exported, andBy the Voltage-output after surge protection to the switching tube driver in current transformer control module, converter module,The first energy-storage units and the second energy-storage units.
13. 1 kinds of converter control system low-voltage protection systems, is characterized in that, described under-voltage is protectedProtecting system comprise switching tube driver in input power, current transformer control module, converter module, withAnd converter control system less voltage protector as described in claim 1 to 12 any one;
Described current transformer control module and described switching tube driver are powered by described input power;
Described current transformer control module receive after described under-voltage locking signal running protection mode of operation and toDescribed switching tube driver sends blocking instruction;
Described switching tube driver turn-offs the switching tube in converter module after receiving blocking instruction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310204237.7A CN103311895B (en) | 2013-05-28 | 2013-05-28 | A kind of converter control system less voltage protector and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310204237.7A CN103311895B (en) | 2013-05-28 | 2013-05-28 | A kind of converter control system less voltage protector and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103311895A CN103311895A (en) | 2013-09-18 |
| CN103311895B true CN103311895B (en) | 2016-05-04 |
Family
ID=49136817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310204237.7A Active CN103311895B (en) | 2013-05-28 | 2013-05-28 | A kind of converter control system less voltage protector and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103311895B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2999075B1 (en) * | 2014-09-18 | 2020-08-05 | Delta Electronics (Thailand) Public Co., Ltd. | Power supply with surge voltage protection |
| CN105186836A (en) * | 2015-08-27 | 2015-12-23 | 广州易和医疗技术开发有限公司 | Power supply under-voltage protection method and protection circuit thereof |
| CN108233338B (en) * | 2016-12-15 | 2021-04-30 | 博世力士乐(西安)电子传动与控制有限公司 | Frequency converter power supply device and frequency converter comprising same |
| CN107370478B (en) * | 2017-08-25 | 2023-04-25 | 浙江绍兴苏泊尔生活电器有限公司 | IGBT drive protection circuit and household appliance |
| CN108493914B (en) * | 2018-02-05 | 2020-09-01 | 广东卓梅尼技术股份有限公司 | Safety electronic switch |
| CN109130864A (en) * | 2018-07-25 | 2019-01-04 | 江苏力信电气技术有限公司 | Electric car low pressure power-down protection circuit |
| CN114362499B (en) * | 2021-11-30 | 2024-02-02 | 漳州科华电气技术有限公司 | Protection circuit and full-control rectifying circuit |
| CN114301034B (en) * | 2021-12-28 | 2024-06-04 | 苏州锴威特半导体股份有限公司 | Gallium nitride power tube driving circuit with overcurrent protection function |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202172281U (en) * | 2011-08-16 | 2012-03-21 | 国电联合动力技术有限公司 | Grid-connected wind generating set |
| CN202240073U (en) * | 2011-06-14 | 2012-05-30 | 北京宏孚瑞达科技有限公司 | Direct-current secondary converter |
| US8247924B1 (en) * | 2010-01-04 | 2012-08-21 | Adtran, Inc. | Power supply and method that maintains supply voltage in communications systems during a power supply interruption |
| CN103089599A (en) * | 2011-10-27 | 2013-05-08 | 北京谊安医疗***股份有限公司 | Compression pump protection circuit and compression pump control method |
-
2013
- 2013-05-28 CN CN201310204237.7A patent/CN103311895B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8247924B1 (en) * | 2010-01-04 | 2012-08-21 | Adtran, Inc. | Power supply and method that maintains supply voltage in communications systems during a power supply interruption |
| CN202240073U (en) * | 2011-06-14 | 2012-05-30 | 北京宏孚瑞达科技有限公司 | Direct-current secondary converter |
| CN202172281U (en) * | 2011-08-16 | 2012-03-21 | 国电联合动力技术有限公司 | Grid-connected wind generating set |
| CN103089599A (en) * | 2011-10-27 | 2013-05-08 | 北京谊安医疗***股份有限公司 | Compression pump protection circuit and compression pump control method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103311895A (en) | 2013-09-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103311895B (en) | A kind of converter control system less voltage protector and system | |
| CN100566075C (en) | Explosive gas atmosphere is with the uninterrupted D.C. regulated power supply of essential safe type | |
| CN107565684A (en) | A kind of exchange detection of integrated emergency lighting and power control system | |
| CN103746570B (en) | Rectifier and electric power equipment | |
| CN109274256A (en) | A kind of power module redundancy energy supply circuit and control method based on breakdown diode | |
| CN109066798A (en) | A kind of cutoff device of photovoltaic module | |
| CN103532188A (en) | Electric vehicle storage battery charging process monitoring device | |
| CN110571920A (en) | emergency power supply switching master control circuit and charging method | |
| CN103303159A (en) | Electric automobile controller and dual-driving control method thereof | |
| CN206272229U (en) | For the reverse-connection preventing circuit of photovoltaic DC-to-AC converter direct current input side | |
| CN106953371A (en) | A kind of alternating current CT energy taking devices and anti-overvoltage circuit | |
| CN204316082U (en) | A kind of overvoltage surge suppresses circuit | |
| CN103337841B (en) | Bidirectional current limiter based on two-way BUCK converter and bidirectional current limiting method | |
| CN206673569U (en) | The output protection circuit of Switching Power Supply | |
| CN104882936A (en) | Communication energy storage power supply system | |
| CN210898626U (en) | Emergency power supply switching master control circuit | |
| CN206041811U (en) | A double feedback multichannel output switch power for variable pitch control ware | |
| CN202678988U (en) | Intelligent power supply control system | |
| CN104218648A (en) | Charging and discharging protection circuit and charging and discharging system | |
| CN203984073U (en) | The battery system of separate redundancy each other | |
| CN216034204U (en) | Standby power supply system of parking controller | |
| CN207426665U (en) | Current transformer and its secondary side protective arrangement for limiting output voltage | |
| CN214069550U (en) | Overcurrent detection protection device for vehicle electrical equipment | |
| CN204761067U (en) | Communication energy storage power supply system | |
| CN108923388A (en) | A kind of fault detection circuit powering on buffer cell and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |