CN209088814U - A kind of quick leadage circuit of high voltage direct current source output - Google Patents
A kind of quick leadage circuit of high voltage direct current source output Download PDFInfo
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- CN209088814U CN209088814U CN201822000148.1U CN201822000148U CN209088814U CN 209088814 U CN209088814 U CN 209088814U CN 201822000148 U CN201822000148 U CN 201822000148U CN 209088814 U CN209088814 U CN 209088814U
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Abstract
The utility model discloses a kind of high voltage direct current sources to export quick leadage circuit, and the defeated high voltage direct current source includes main power inverter and control module, and the main power inverter is used for apparatus of load output voltage；The control module is used to control the size of main power inverter output voltage, it further include the electronic load for realizing pulling load current size dynamic control, the electronic load is connected to output both ends of main power inverter and in parallel with apparatus of load, the control terminal of the electronic load control terminal link control module, the control module is used to export different control voltage to electronic load according to the different working condition that apparatus of load is set, the electronic load is used to draw to carry with different pulling load currents according to different control voltage that the output voltage of main power inverter to be made to transform to the working condition of setting.The case where electronic load circuit of the utility model can change according to output voltage and load, effectively adjusts the drawing loading capability of electronic load, greatly shortens discharge cycle.
Description
Technical field
The utility model belongs to circuit applied technical field, and in particular to a kind of quick vent discharge of high voltage direct current source output
Road.
Background technique
In recent years, high-voltage DC power supply is exported to higher voltage and higher power density develops rapidly, and client is to device
Experience requirements be continuously improved.Therefore, device how is made to have good dynamic effect in adjustable output voltage range, simultaneously
Again can be after device power-off, output kV level voltage can be rapidly decreased to 0V, to ensure that customer electricity safety, this problem seem
It is important and urgent.
Currently, the big more options of product on the market pile up numerous discharge resistances between output BUS+, BUS-, to reach
The purpose that output capacitance is discharged after device power-off.But this mode have the shortcomings that it is obvious:
The first, conductive discharge process is uncontrollable.When discharge resistance resistance value is fixed, with letting out for output capacitance electricity
It puts, output voltage decline, the ability of the vent discharge electricity capacity of resistance constantly weakens, and generates longer hangover time.
The second, discharge resistance volume is bigger than normal.It is exported in high voltage direct current source kV rank, if desired tens mA, which release to draw, carries energy
Power.According on the market resistor power, resistance value collocation, need the series-parallel of multiple resistance, this obviously with the hair of high power density
It runs counter in exhibition direction.
Third, the dynamic effect of resistance are bad.In the process of running, output voltage can constantly change, defeated in high voltage direct current source
The size loaded out can also constantly change, this requires the drawing loading capability of bleeder resistance constantly accordingly to be adjusted according to output dynamic change
Whole, the traditional resistor mode of releasing is difficult to realize.
Utility model content
The purpose of this utility model is exactly to provide a kind of high voltage direct current source to solve deficiency existing for above-mentioned background technique
The case where exporting quick leadage circuit, being changed according to load, effectively adjusts the drawing loading capability of electronic load.
The technical solution adopted in the utility model is: a kind of quick leadage circuit of high voltage direct current source output, the high straightening
Defeated stream source includes main power inverter and control module, and the main power inverter is used for apparatus of load output voltage；It is described
Control module is used to control the size of main power inverter output voltage, further includes electronic load, the electronic load is connected to
The output both ends of main power inverter are simultaneously in parallel with apparatus of load, the control of the electronic load control terminal link control module
End, the control module are used to export different control voltage to Electronic Negative according to the different working condition that apparatus of load is set
It carries, the electronic load, which is used to be drawn according to different control voltage with different pulling load currents, carries the output for making main power inverter
Working condition of the voltage transformation to setting.
Further, the electronic load includes metal-oxide-semiconductor, sampling resistor R14 and for controlling metal-oxide-semiconductor grid voltage size
Control circuit, the drain electrode of the metal-oxide-semiconductor connects main power inverter output head anode, and the source electrode of metal-oxide-semiconductor connects sampling resistor
The one end R14, the output end of the grid connection control circuit of metal-oxide-semiconductor, the sampling resistor R14 other end connect main power inverter
The input terminal of negative pole of output end and control circuit, the control terminal of the control terminal link control module of the control circuit.
Further, the control circuit includes amplifier and comparator, resistance R2, resistance R3, resistance R12, resistance R15
Sampling resistor R14 is connected to by resistance R15 with the reverse input end of resistance R17, the amplifier and main power inverter is defeated
Between outlet cathode, the simulation of the noninverting input link control module of amplifier, the output end of amplifier, which is connected to, to be compared
The negative input end of device；The simulation of the positive input terminal link control module of the comparator, the output end of comparator connects metal-oxide-semiconductor
Grid, the control terminal of the control module, reference voltage output end and simulation ground pass through resistance R2, resistance R3 and resistance respectively
R17 is connected to the negative input end of comparator, and the resistance R12 is connected between the reverse input end of amplifier and output end.
It further, further include sampling module, the sampling module is for the main power inverter output of real-time sampling
Voltage and current is sent to control module, and the control module carries out feedback regulation control for voltage and current based on the received
The output voltage size of main power inverter.
The utility model works with metal-oxide-semiconductor in one electronic load circuit of characteristic Design of linear zone, can be according to output
The case where voltage and load variation, the drawing loading capability of electronic load is effectively adjusted, so that it is defeated quickly to change main power inverter
The size of voltage out, has the advantage that
First, electronic load improves the flexibility and adaptivity of system control: compared to consolidating for traditional resistor load
Qualitative, electronic load can be loaded according to high voltage direct current source and the characteristic of converter itself, adjusts the size of pulling load current in real time, makes
Control is smoothly easily achieved, and under the premise of not needing to make change to hardware, greatly shortens regulating cycle.
Second, electronic load draw carrier have preferable continuity: when converter after a loss of power, be supported on traditional resistor
When drawing load, when can be reduced to relatively low value in the presence of very long hangover time, especially output voltage, this makes client's use feeling
By bad, the utility model electronic load can be drawn with a constant electric current and be carried before accessory power supply power down, make output electricity
Pressure is quickly down to the state that 0V or client need.
Detailed description of the invention
Fig. 1 is the schematic diagram of the utility model leadage circuit.
Fig. 2 is the circuit diagram of the utility model electronic load.
Fig. 3 is the flow chart of the utility model leadage circuit work.
Specific embodiment
The utility model is described in further detail in the following with reference to the drawings and specific embodiments, convenient for being well understood
The utility model, but they do not constitute the utility model and limit.
As shown in Figure 1 and Figure 2, a kind of high voltage direct current source of the utility model exports quick leadage circuit, the high voltage direct current source
Defeated includes main power inverter and control module, and the main power inverter is used for apparatus of load output voltage；The control
Module is used to control the size of main power inverter output voltage, further includes the electricity for realizing pulling load current size dynamic control
Son load, the electronic load are connected to the output both ends of main power inverter and, the electronic load in parallel with apparatus of load
The control terminal of control terminal link control module, the different working condition that the control module is used to be set according to apparatus of load is (i.e.
The working condition that client needs) to electronic load, the electronic load is used for according to different controls the different control voltage of output
Voltage processed, which draws to carry with different pulling load currents, makes the output voltage of main power inverter transform to the working condition of setting as early as possible.
In above scheme, electronic load includes metal-oxide-semiconductor Q1, sampling resistor R14 and for controlling metal-oxide-semiconductor grid voltage size
Control circuit, the drain electrode of the metal-oxide-semiconductor Q1 connects main power inverter output head anode, and the source electrode of metal-oxide-semiconductor Q1 connects sampling
The one end resistance R14, the output end of the grid connection control circuit of metal-oxide-semiconductor Q1, the sampling resistor R14 other end connect main power
The input terminal of converter output terminal cathode and control circuit, the control terminal of the control terminal link control module of the control circuit.
In above scheme, control circuit includes amplifier U1B and comparator U1A, resistance R2, resistance R3, resistance R12, electricity
Resistance R15 and resistance R17, the reverse input end of the amplifier U1B are connected to sampling resistor R14 and main power by resistance R15
Between converter output terminal cathode, the simulation of the noninverting input link control module of amplifier U1B, amplifier U1B's is defeated
Outlet is connected to the negative input end of comparator U1A by resistance R7；The positive input terminal link control module of the comparator U1A
Simulation ground, the grid of the output end connection metal-oxide-semiconductor Q1 of comparator U1A, the control terminal of the control module, reference voltage output end
It is connected to the negative input end of comparator U1A by resistance R2, resistance R3 and resistance R17 respectively with simulation, the resistance R12 connects
It connects between the reverse input end and output end of amplifier U1B.
It further include sampling module in above scheme, the sampling module is for the main power inverter output of real-time sampling
Voltage and current is sent to control module, and the control module carries out feedback regulation control for voltage and current based on the received
The output voltage size of main power inverter.
The utility model electronic load is additionally provided with corresponding peripheral circuit, can make metal-oxide-semiconductor Q1, sampling resistor in electronic load
R14, amplifier U1B, comparator U1A work are more stable, as shown in Fig. 2, the peripheral circuit is conventional series and parallel compensated resistance, electricity
Hold the circuits such as filtering, the pressure stabilizing of composition.
The utility model electronic load, which is realized, draws the principle of loading capability as follows:
When main power inverter when high voltage direct current source normally exports, metal-oxide-semiconductor Q1 and sampling resistor R14 are connected in parallel on equipment and bear
Both ends are carried, the power section for carrying circuit is drawn as electronic load, metal-oxide-semiconductor Q1 works in linear zone.
When can be seen that the work of high voltage direct current source from control flow shown in Fig. 3, control module may according to apparatus of load
DA value is subdivided into several specific numerical value by the state of work from small to large, when client needs to make apparatus of load work in correspondence
Working condition when, different DA values will be distributed to electronic load according to the principle of agreement by control module.
Assuming that a certain moment, the pulling load current of electronic load is I0, the control voltage that control module issues is DA, then controls
Voltage DA and pulling load current I0Relationship it is as follows:
Client can make its work under CC, CV mode, export under different mode during using high voltage direct current source
Voltage swing is different, therefore control module can provide different DA values, and such electronic load can carry electricity with different constant drawings
Stream, which is drawn, to be carried, so that the operating mode for needing main power inverter output voltage Fast transforms, greatly improves what client used
Effect.
The utility model works with metal-oxide-semiconductor in one electronic load circuit of characteristic Design of linear zone, can be according to output
The case where voltage and load variation, the drawing loading capability of electronic load is effectively adjusted, to change main power inverter output electricity
The size of pressure.
The utility model electronic load improves the flexibility and adaptivity of system control, loads compared to traditional resistor
Stationarity, electronic load can according to high voltage direct current source load and main power inverter itself characteristic, in real time adjustment draw carry electricity
The size of stream is easily achieved control smoothly, and under the premise of not needing to make change to hardware, greatly shortens debugging week
Phase.
The utility model electronic load draw carrier have preferable continuity, when main power inverter after a loss of power, with biography
Ohmic load unite when drawing load, when can be reduced to relatively low value in the presence of very long hangover time, especially output voltage, this makes
Client's use feeling it is bad, the utility model electronic load can be before accessory power supply power down, with a constant electric current
It draws and carries, output voltage is made quickly to be down to the state that 0V or client need.
The content being not described in detail in this specification belongs to the prior art well known to professional and technical personnel in the field.
Claims (4)
1. a kind of high voltage direct current source exports quick leadage circuit, the defeated high voltage direct current source includes main power inverter and control mould
Block, the main power inverter are used for apparatus of load output voltage；The control module is defeated for controlling main power inverter
The size of voltage out, it is characterised in that: including electronic load, the electronic load is connected to the output both ends of main power inverter
And, the control terminal of the electronic load control terminal link control module in parallel with apparatus of load, the control module are used for basis
The different working condition of apparatus of load setting exports different control voltage to electronic load, and the electronic load is used for according to not
Same control voltage, which draws to carry with different pulling load currents, makes the output voltage of main power inverter transform to the working condition of setting.
2. high voltage direct current source according to claim 1 exports quick leadage circuit, it is characterised in that: the electronic load packet
Include metal-oxide-semiconductor, sampling resistor R14 and the control circuit for controlling metal-oxide-semiconductor grid voltage size, the drain electrode connection of the metal-oxide-semiconductor
Main power inverter output head anode, the source electrode of metal-oxide-semiconductor connect the one end sampling resistor R14, and the grid of metal-oxide-semiconductor connects control circuit
Output end, the sampling resistor R14 other end connects the input terminal of main power inverter negative pole of output end and control circuit, institute
State the control terminal of the control terminal link control module of control circuit.
3. high voltage direct current source according to claim 2 exports quick leadage circuit, it is characterised in that: the control circuit packet
Include amplifier and comparator, resistance R2, resistance R3, resistance R12, resistance R15 and resistance R17, the reversed input of the amplifier
End is connected between sampling resistor R14 and main power inverter negative pole of output end by resistance R15, the noninverting input of amplifier
The simulation of link control module, the output end of amplifier is connected to the negative input end of comparator；The positive input of the comparator
With holding the simulation of link control module, the grid of the output end connection metal-oxide-semiconductor of comparator, the control terminal of the control module, base
Quasi- voltage output end and simulation ground are connected to the negative input end of comparator by resistance R2, resistance R3 and resistance R17 respectively, described
Resistance R12 is connected between the reverse input end of amplifier and output end.
4. high voltage direct current source according to claim 1 exports quick leadage circuit, it is characterised in that: further include sampling mould
Block, voltage and current of the sampling module for the main power inverter output of real-time sampling are sent to control module, the control
Molding block carries out the output voltage size of the main power inverter of feedback regulation control for voltage and current based on the received.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822000148.1U CN209088814U (en) | 2018-11-30 | 2018-11-30 | A kind of quick leadage circuit of high voltage direct current source output |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822000148.1U CN209088814U (en) | 2018-11-30 | 2018-11-30 | A kind of quick leadage circuit of high voltage direct current source output |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209088814U true CN209088814U (en) | 2019-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822000148.1U Active CN209088814U (en) | 2018-11-30 | 2018-11-30 | A kind of quick leadage circuit of high voltage direct current source output |
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| CN (1) | CN209088814U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109302059A (en) * | 2018-11-30 | 2019-02-01 | 武汉精能电子技术有限公司 | A kind of quick leadage circuit of high voltage direct current source output |
| CN116679785A (en) * | 2023-06-21 | 2023-09-01 | 湖南恩智测控技术有限公司 | Output voltage adjusting circuit, adjusting method, power supply device, and storage medium |
-
2018
- 2018-11-30 CN CN201822000148.1U patent/CN209088814U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109302059A (en) * | 2018-11-30 | 2019-02-01 | 武汉精能电子技术有限公司 | A kind of quick leadage circuit of high voltage direct current source output |
| CN116679785A (en) * | 2023-06-21 | 2023-09-01 | 湖南恩智测控技术有限公司 | Output voltage adjusting circuit, adjusting method, power supply device, and storage medium |
| CN116679785B (en) * | 2023-06-21 | 2024-01-09 | 湖南恩智测控技术有限公司 | Output voltage adjusting circuit, adjusting method, power supply device, and storage medium |
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