CN107425708A - Auxiliary power circuit and its control method - Google Patents
Auxiliary power circuit and its control method Download PDFInfo
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- CN107425708A CN107425708A CN201710662476.5A CN201710662476A CN107425708A CN 107425708 A CN107425708 A CN 107425708A CN 201710662476 A CN201710662476 A CN 201710662476A CN 107425708 A CN107425708 A CN 107425708A
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/36—Means for starting or stopping converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/34—Snubber circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/34—Snubber circuits
- H02M1/348—Passive dissipative snubbers
Abstract
The invention discloses a kind of auxiliary power circuit and its control method, its drip irrigation device is to include U phases port, V phases port, W phases port, three phase rectifier bridge module and the output port for being connected to three phase rectifier bridge module, soft-start circuit is connected on one circuit of three phase rectifier bridge module, the connection voltage-multiplying circuit of multiplication of voltage switching circuit, soft-start circuit and multiplication of voltage switching circuit is connected on another circuit of three phase rectifier bridge module；The current potential of multiplication of voltage switching circuit collection output port simultaneously judges first voltage or second voltage, first voltage is less than second voltage, it is judged as connecting voltage-multiplying circuit during first voltage, has reached wide input, the effect that input pattern is various, highly reliable, and more efficient energy-saving.
Description
Technical field
The present invention relates to welder power field of circuit technology, more particularly to auxiliary power circuit and its control method.
Background technology
Electric welding machine needs accessory power supply to be powered in use, and the accessory power supply of in the market is typically using switch electricity
The circuit structure principle in source is designed, and the Switching Power Supply species of in the market is also more, but the power supply for electric welding machine is auxiliary
Power supply is helped to need electric power output DC600V voltage, although in the market can solve the problems, such as voltage output, its
The power input of use is generally fixed form, it is desirable to and it is strict, simply it is limited with single input mode, input mode.
The content of the invention
In view of the deficienciess of the prior art, it is an object of the invention to provide a kind of auxiliary power circuit and its controlling party
Method, there is wide input, the advantage that input pattern is various, highly reliable.
The present invention above-mentioned technical purpose technical scheme is that：A kind of auxiliary power circuit, bag
Include U phases port, V phases port, W phases port, three phase rectifier bridge module and the output port for being connected to three phase rectifier bridge module, institute
State and soft-start circuit is connected on a circuit of three phase rectifier bridge module, connection times on another circuit of three phase rectifier bridge module
Switching circuit is pressed, the output of soft-start circuit and multiplication of voltage switching circuit connects voltage-multiplying circuit；
The current potential of multiplication of voltage switching circuit collection output port simultaneously judges first voltage or second voltage, and first voltage is less than second
Voltage, it is judged as connecting voltage-multiplying circuit during first voltage.
By above-mentioned setting, the output for power supply requires relatively low, can be inputted with three-phase electricity or single-phase electricity inputs,
It can be that 220V first voltage input or 380V second voltage are inputted, according to different input modes, make
Go out corresponding output adjustment, when 220V voltages, output voltage is inadequate, so needing to improve by voltage-multiplying circuit
Output voltage, and when 380V control sources, being rectified into direct current output has just met to require, this programme is in different voltages
When input, it can carry out effectively judging and control, improve reliability.
Can be preferably as concrete scheme of the invention：The multiplication of voltage switching circuit include on-off circuit, latching circuit,
Comparison circuit and reduction voltage circuit；
Reduction voltage circuit collection output port voltage is gone forward side by side the first servo-actuated feedback signal of line reduced output voltage,
Comparison circuit connects reduction voltage circuit, is configured with setting value, the first feedback signal and setting value are compared, judge whether second
Voltage；
Latching circuit is connected to comparison circuit, is not carried out when comparison circuit is judged as first voltage to comparing circuit output signal
Keep, locked when comparison circuit is judged as second voltage to comparing circuit output signal；
On-off circuit is connected to comparison circuit output end, and the break-make of voltage-multiplying circuit is controlled according to comparison circuit output.
By above-mentioned setting, reduction voltage circuit is acquired to control source situation, if 220V control sources, then be depressured
Circuit samples by linear voltage decreasing, is compared afterwards by comparison circuit, and comparison circuit is judged as 220V voltages, then by switching electricity
Road connection voltage-multiplying circuit carries out multiplication of voltage output, if it is determined that on-off circuit, then be maintained at by 380V voltages by latching circuit
The state being failure to actuate, in order to avoid malfunction.Thus, it is possible to further improve the reliability of circuit work.In real process, when
When input voltage is judged as 380V, if there is power fluctuation, the easy frequent movement of on-off circuit so that on-off circuit longevity
Life reduces, and after this programme uses latching circuit, effectively can be carried out during input rises to 380V by 220V reliable
Switching, then effectively can keep voltage-multiplying circuit to be off, avoid in high input voltage in 380V voltage location free procedures
The situation of multiplication of voltage occurs again afterwards.
The safety of this mode is embodied in：When input voltage floats in 380V, if on-off circuit is disturbed connection, hold
Easily make it that output voltage is higher, is easily damaged equipment.
Can be preferably as concrete scheme of the invention：The reduction voltage circuit includes transforming circuit, bleeder circuit and electricity
Pressure follows circuit, and the input collection output port voltage of the transforming circuit carries out equal proportion decompression, and bleeder circuit connection becomes
Volt circuit output end forms sampled signal, and voltage follower circuit connects bleeder circuit to transmit sampled signal.
By above-mentioned setting, reduction voltage circuit can gather the voltage swing of output port, and the voltage of output port is big
Moderate fluctuation changes, and is directly reflected into the output of voltage follower circuit.
Can be preferably as concrete scheme of the invention：The comparison circuit includes comparator U7B, resistance R26, resistance
R27 and potentiometer RT1, resistance R26 one end connection voltage 12V, resistance R26 other end connection resistance R27, comparator U7B
In-phase input end, resistance R27 other end connection potentiometer RT1 one end, potentiometer RT1 other end ground connection.
By above-mentioned setting, potentiometer RT1 can adjust the size of setting value, and the voltage of sampling can be judged,
Whether exceed setting value, be second voltage input more than setting value explanation, otherwise explanation is first voltage input.
Can be preferably as concrete scheme of the invention：The latching circuit includes resistance R29, electric capacity C35, diode
D13, diode D12 and triode Q3, resistance R29 one end connection comparator U7B output end, diode D12 anode, electricity
Hinder R29 other end connection electric capacity C35 one end, diode D13 anodes, electric capacity C35 other end ground connection, diode D13 the moon
Pole connecting triode Q3 base stage, triode Q3 grounded collector, triode Q3 emitter stage connection diode D12 negative electrodes,
Comparator U7B in-phase input end.
Also become by above-mentioned setting, comparator U7B output low levels, triode Q3 conductings, comparator U7B setting value
It is low, comparator U7B output low levels；If comparator U7B exports high level, triode Q3 cut-offs, comparator U7B setting value
Constant, comparator U7B can be compared according to the setting value on inverting input and in-phase input end, if anti-phase terminal voltage
More than in-phase end, low level is exported, otherwise exports high level.
Can be preferably as concrete scheme of the invention：The soft-start circuit includes the piezo-resistance of multiple series connection
Group, two relay groups parallel with one another, switching tube 2Q1, resistance 2R9, electric capacity 2C11, diode 2D3 and diode 2D6, pressure
Quick resistance group and relay group are in parallel, relay group one end connecting valve pipe 2Q1 drain electrode, switching tube 2Q1 source ground, open
Close pipe 2Q1 grid connection resistance 2R9 one end, electric capacity 2C11 one end, diode 2D3 anodes and diode 2D6 negative electrodes, resistance
The 2R9 other ends connect 24V voltages, the electric capacity 2C11 other ends and diode 2D6 plus earths with diode 2D3 negative electrodes.
Lead to above-mentioned setting, soft-start circuit first connects piezo-resistance group during being powered at the beginning, and it avoids electric current
Impact, enters line delay by electric capacity 2C11, and when electric capacity 2C11 is full of, switching tube 2Q1 conductings, will so as to which relay group acts
The short circuit of piezo-resistance group.Using relay group, the service life of single relay can be effectively improved.It is useful in this circuit environment
High current environment in.
A kind of auxiliary power circuit control method, using auxiliary power circuit：
When inputting three-phase first voltage, after being rectified into direct current by three phase rectifier bridge module, then connected by multiplication of voltage switching circuit
Logical voltage-multiplying circuit carries out multiplication of voltage；
When inputting three-phase second voltage, direct current is rectified into by three phase rectifier bridge module and exported；
In input single-phase first voltage, after being rectified into direct current by three phase rectifier bridge module, then connected by multiplication of voltage switching circuit
Logical voltage-multiplying circuit carries out multiplication of voltage；
In input single-phase second voltage, direct current is rectified into by three phase rectifier bridge module and exported.
In summary, the invention has the advantages that：Input voltage range is wide, and input normal form is various, reliable operation
Property it is high.
Brief description of the drawings
Fig. 1 be the present embodiment circuit diagram, main presentation three phase rectifier bridge module；
Fig. 2 is the circuit diagram of the present embodiment, main presentation soft-start circuit and on-off circuit；
Fig. 3 be the present embodiment circuit diagram, main presentation voltage-multiplying circuit；
Fig. 4 is the circuit diagram of the present embodiment, the partial circuit in main presentation reduction voltage circuit；
Fig. 5 be the present embodiment circuit diagram, main presentation reduction voltage circuit；
Fig. 6 is the circuit diagram of the present embodiment, main presentation bleeder circuit and voltage follower circuit；
Fig. 7 is the circuit diagram of the present embodiment, main presentation comparison circuit and latching circuit.
In figure：101st, U phases port；102nd, V phases port；103rd, W phases port；200th, three phase rectifier bridge module；300th, export
Port；400th, soft-start circuit；500th, multiplication of voltage switching circuit；510th, on-off circuit；520th, latching circuit；530th, comparison circuit；
540th, reduction voltage circuit；541st, transforming circuit；542nd, bleeder circuit；543rd, voltage follower circuit；600th, voltage-multiplying circuit.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing.
Embodiment：
A kind of auxiliary power circuit, as shown in figure 1, including U phases port 101, V phases port 102, W phases port 103, three phase rectifier
Bridge module 200 and output port 300.U phases port 101, V phases port 102, W phases port 103 meet single-phase defeated as input
Enter 220V power supplys, this is two wires power supply, can connect U, V phase port 102, or V, W phase port 103 or single-phase defeated
Enter 380V power supplys.
Output port 300 is connected to the left side in Fig. 2 from three phase rectifier bridge module 200.
On one circuit of three phase rectifier bridge module 200 connect soft-start circuit 400, three phase rectifier bridge module 200 it is another
The output PCON8 and JP1 of multiplication of voltage switching circuit 500, soft-start circuit 400 and multiplication of voltage switching circuit 500 are connected on one circuit
Connect voltage-multiplying circuit 600.As shown in figure 3, voltage-multiplying circuit 600 is made up of multiple electric capacity and resistance, which includes electric capacity C1-
C8, resistance R1-R6.
Multiplication of voltage switching circuit 500 gathers the current potential of output port 300 and judges first voltage or second voltage, the first electricity
Pressure is less than second voltage, is judged as connecting voltage-multiplying circuit 600 during first voltage.First voltage is by taking 220V control sources as an example, and
Two voltages are by taking 380V control sources as an example.
The output of power supply can be inputted with three-phase electricity or single-phase input, can be 220V first voltage input, can also
It is that 380V second voltage is inputted, according to different input modes, multiplication of voltage switching circuit 500 is made corresponding output and adjusted
It is whole.When 220V voltages, output voltage is inadequate, so needing to improve output voltage by voltage-multiplying circuit 600；When
When 380V control sources, it is rectified into direct current output and has just met to require.This programme is when different control sources, energy
Effectively judge and control, improve reliability.
As shown in Fig. 2 multiplication of voltage switching circuit 500 includes on-off circuit 510, latching circuit 520, comparison circuit 530 and drop
Volt circuit 540.
With reference to shown in Fig. 4, Fig. 5 and Fig. 6, reduction voltage circuit 540 includes transforming circuit 541, bleeder circuit 542 and voltage follow
Circuit 543.Reduction voltage circuit 540 gathers the voltage of output port 300 and gone forward side by side the first servo-actuated feedback signal of line reduced output voltage.
With reference to shown in Fig. 4, this is control section in transforming circuit 541, and transforming circuit 541 uses switching power circuit knot
Structure, using chip U3 as core main part, U3 model UC3845, its output end has A ends and G ends, A ends and G ends for control section
It is connected on the A ends and G ends in Fig. 5.The input of transforming circuit 541 is+620V in this example, and this is voltage-multiplying circuit in Fig. 3
Collection voltages after 600 multiplication of voltages.620V voltages are exported by the secondary side after transformer T1 transformations in transformer T1, transformer
S1 ports in secondary side output end S1 connection figures 6.
In figure 6, input of the S1 ports as bleeder circuit 542, bleeder circuit 542 include diode D11, electric capacity
C32, resistance R30, resistance R31, resistance R23.Diode D11 cathode connection terminal mouth S1, the anode connection electric capacity C32 of diode
One end, resistance R30 one end, electric capacity C32 other end ground connection, resistance R30 other end connection resistance R31 one end, resistance R23 mono-
End, resistance R31 other ends ground connection, the output of the resistance R23 other ends.During work：Signal enters through resistance R30 and electricity by S1 ports
Hinder R31 and carry out partial pressure, to reduce signal amplitude.
Voltage follower circuit 543 includes comparator U7A, resistance R24 and resistance R25.Resistance R24 is connected to comparator U7A
Inverting input and output end between, comparator U7A in-phase end ground connection, comparator U7A output end connection resistance R25.
During work：Signal is consistent at port S2 ends to enter as the first feedback signal in comparator inverting input input and output side
Row output.
As from the foregoing：Input collection output port 300 voltage of transforming circuit 541 carries out equal proportion decompression, partial pressure electricity
Road 542 connects the output end of transforming circuit 541 and forms sampled signal, and voltage follower circuit 543 connects bleeder circuit 542 to transmit
Sampled signal.Reduction voltage circuit 540 can gather the voltage swing of output port 300, and the voltage swing of output port 300 floats
Dynamic change, is directly reflected into the output of voltage follower circuit 543.
As shown in fig. 7, comparison circuit 530 connects reduction voltage circuit 540, setting value is configured with, by the first feedback signal and is set
Definite value compares, and judges whether second voltage.
Comparison circuit 530 includes comparator U7B, resistance R26, resistance R27 and potentiometer RT1, resistance R26 one end connection
Voltage 12V, resistance R26 other end connection resistance R27, comparator U7B in-phase input end, resistance R27 other end connection
Potentiometer RT1 one end, potentiometer RT1 other end ground connection.During work：Potentiometer RT1 can adjust the size of setting value, can be with
The voltage of sampling is judged, if be second voltage input more than setting value explanation more than setting value, otherwise explanation is the
One control source.
Latching circuit 520 is connected to comparison circuit 530, when comparison circuit 530 is judged as first voltage not to more electric
The output signal of road 530 is kept, and the output signal of comparison circuit 530 is carried out when comparison circuit 530 is judged as second voltage
Locking.
Latching circuit 520 includes resistance R29, electric capacity C35, diode D13, diode D12 and triode Q3, resistance R29
One end connection comparator U7B output end, diode D12 anode, resistance R29 other end connection electric capacity C35 one end, two
Pole pipe D13 anodes, electric capacity C35 other end ground connection, diode D13 cathode connected to the transistor Q3 base stage, triode Q3's
Grounded collector, triode Q3 emitter stage connection diode D12 negative electrodes, comparator U7B in-phase input end.
During work：Comparator U7B exports low level, triode Q3 conductings, comparator U7B setting value also step-down, compares
Device U7B exports low level；If comparator U7B exports high level, triode Q3 cut-offs, comparator U7B setting value is constant, than
It can be compared compared with device U7B according to the setting value on inverting input and in-phase input end, if anti-phase terminal voltage is more than together
Xiang Duan, low level is exported, otherwise exports high level.
On-off circuit 510 is connected to the output end of comparison circuit 530, is exported according to comparison circuit 530 to voltage-multiplying circuit 600
Break-make is controlled.
Port S3 in Fig. 7 is connected to the port S3 in Fig. 2.On-off circuit 510 includes resistance 2R10, photoelectrical coupler
2U1, electric capacity 2C14, resistance 2R11, resistance 2R112, resistance 2R113, resistance 2R114, triode 2Q3, diode 2D4, two poles
Pipe 2D7, diode 2D5, electric capacity 2C16, switching tube 2Q1 and relay 2K1,2K2.Relay 2K1,2K2 parallel connection, which can improve, holds
Loading capability, adapt in the circuit that this high current was entered.
During work：When S3 ports are low level, then photoelectrical coupler 2U1 is not turned on, and electric capacity 2C14 maintains triode 2Q3's
Basis set high level, triode 2Q3 conductings, switching tube 2Q1 grid are in low level, and switching tube 2Q1 is in cut-off state, relay
Device 2K1 and 2K2 are failure to actuate.
Soft-start circuit 400 includes the piezo-resistance group of multiple series connection, two relay groups parallel with one another, switching tubes
2Q1, resistance 2R9, electric capacity 2C11, diode 2D3 and diode 2D6, piezo-resistance group and relay group are in parallel, relay group one
Hold connecting valve pipe 2Q1 drain electrode, switching tube 2Q1 source ground, switching tube 2Q1 grid connection resistance 2R9 one end, electric capacity
2C11 one end, diode 2D3 anodes and diode 2D6 negative electrodes, the resistance 2R9 other ends and diode 2D3 negative electrodes connect 24V electricity
Pressure, the electric capacity 2C11 other ends and diode 2D6 plus earths.
Soft-start circuit 400 first connects piezo-resistance group during being powered at the beginning, and it avoids rush of current, passes through
Electric capacity 2C11 enters line delay, and when electric capacity 2C11 is full of, switching tube 2Q1 is turned on, so as to which relay group acts, by piezo-resistance group
Short circuit.Using relay group, the service life of single relay can be effectively improved.It is useful in the high current ring of this circuit environment
In border.
During overall work：If 220V control sources, then reduction voltage circuit 540 samples by linear voltage decreasing, passes through afterwards
Comparison circuit 530 compares, and comparison circuit 530 is judged as 220V control sources, it is necessary to carry out multiplication of voltage, is exported at Fig. 7 S3 ends high
Level, that is, S3 ports are high level, and on-off circuit 510 control relay 2K1 and 2K2 are acted.If input is 380V electricity
Pressure, comparison circuit 530 are judged as 380V voltages, and comparison circuit 530 persistently keeps high level output by latching circuit 520, opened
Powered-down road 510 is maintained at the state being failure to actuate, in order to avoid malfunction.Thus, it is possible to further improve the reliable of circuit work
Property.In real process, when input voltage is judged as 380V, if there is power fluctuation, on-off circuit 510 is easily frequent
Action so that the service life reduction of on-off circuit 510, can be effectively in input by 220V after this programme uses latching circuit 520
Reliably switched during being raised to 380V, voltage-multiplying circuit 600 then can be effectively kept in 380V voltage location free procedures
It is off, avoids the situation of the multiplication of voltage again after high input voltage from occurring.
The safety of this mode is embodied in：When input voltage floats in 380V, if on-off circuit 510 is disturbed connection,
Then easily make it that output voltage is higher, is easily damaged equipment.
A kind of auxiliary power circuit control method, using auxiliary power circuit：
When inputting three-phase first voltage, after being rectified into direct current by three phase rectifier bridge module 200, then pass through multiplication of voltage switching circuit
500 connection voltage-multiplying circuits 600 carry out multiplication of voltage；
When inputting three-phase second voltage, direct current is rectified into by three phase rectifier bridge module 200 and exported；
In input single-phase first voltage, after being rectified into direct current by three phase rectifier bridge module 200, then pass through multiplication of voltage switching circuit
500 connection voltage-multiplying circuits 600 carry out multiplication of voltage；
In input single-phase second voltage, direct current is rectified into by three phase rectifier bridge module 200 and exported.
This specific embodiment is only explanation of the invention, and it is not limitation of the present invention, people in the art
Member can make the modification of no creative contribution to the present embodiment as needed after this specification is read, but as long as at this
All protected in the right of invention by Patent Law.
Claims (7)
1. a kind of auxiliary power circuit, including U phases port (101), V phases port (102), W phases port (103), three-phase commutation bridge
Module (200) and the output port (300) for being connected to three phase rectifier bridge module (200), it is characterised in that：The three phase rectifier
Soft-start circuit (400) is connected on one circuit of bridge module (200), on another circuit of three phase rectifier bridge module (200)
Multiplication of voltage switching circuit (500) is connected, the output of soft-start circuit (400) and multiplication of voltage switching circuit (500) connects voltage-multiplying circuit
(600)；
The current potential of multiplication of voltage switching circuit (500) collection output port (300) simultaneously judges first voltage or second voltage, the first electricity
Pressure is less than second voltage, is judged as connecting voltage-multiplying circuit (600) during first voltage.
2. auxiliary power circuit according to claim 1, it is characterised in that：The multiplication of voltage switching circuit (500) includes opening
Powered-down road (510), latching circuit (520), comparison circuit (530) and reduction voltage circuit (540)；
The reduction voltage circuit (540) collection output port (300) voltage is gone forward side by side the first servo-actuated feedback letter of line reduced output voltage
Number,
Comparison circuit (530) connection reduction voltage circuit (540), is configured with setting value, the first feedback signal and setting value is compared, sentenced
It is disconnected whether second voltage；
Latching circuit (520) is connected to comparison circuit (530), when comparison circuit (530) is judged as first voltage not to comparing
Circuit (530) output signal is kept, and comparison circuit (530) is exported when comparison circuit (530) is judged as second voltage
Signal is locked；
On-off circuit (510) is connected to comparison circuit (530) output end, is exported according to comparison circuit (530) to voltage-multiplying circuit
(600) break-make is controlled.
3. auxiliary power circuit according to claim 2, it is characterised in that：The reduction voltage circuit (540) includes becoming piezoelectricity
Road (541), bleeder circuit (542) and voltage follower circuit (543), the input collection output end of the transforming circuit (541)
Mouth (300) voltage carries out equal proportion decompression, and bleeder circuit (542) connection transforming circuit (541) output end forms sampled signal, electricity
Pressure follows circuit (543) to connect bleeder circuit (542) to transmit sampled signal.
4. auxiliary power circuit according to claim 3, it is characterised in that：The comparison circuit (530) includes comparator
U7B, resistance R26, resistance R27 and potentiometer RT1, resistance R26 one end connection voltage 12V, resistance R26 other end connection electricity
R27, comparator U7B in-phase input end are hindered, resistance R27 other end connection potentiometer RT1 one end, potentiometer RT1's is another
End ground connection.
5. auxiliary power circuit according to claim 4, it is characterised in that：The latching circuit (520) includes resistance
R29, electric capacity C35, diode D13, diode D12 and triode Q3, resistance R29 one end connection comparator U7B output end,
Diode D12 anode, resistance R29 other end connection electric capacity C35 one end, diode D13 anodes, the electric capacity C35 other end
Ground connection, diode D13 cathode connected to the transistor Q3 base stage, triode Q3 grounded collector, triode Q3 emitter stage
Connect diode D12 negative electrodes, comparator U7B in-phase input end.
6. auxiliary power circuit according to claim 1, it is characterised in that：The soft-start circuit (400) includes multiple
The piezo-resistance group of series connection, two relay groups parallel with one another, switching tube 2Q1, resistance 2R9, electric capacity 2C11, diode 2D3
With diode 2D6, piezo-resistance group and relay group are in parallel, relay group one end connecting valve pipe 2Q1 drain electrode, switching tube
2Q1 source ground, switching tube 2Q1 grid connection resistance 2R9 one end, electric capacity 2C11 one end, diode 2D3 anodes and two poles
Pipe 2D6 negative electrodes, the resistance 2R9 other ends and diode 2D3 negative electrodes connect 24V voltages, the electric capacity 2C11 other ends and diode 2D6 sun
Pole is grounded.
7. a kind of auxiliary power circuit control method, it is characterised in that use auxiliary power circuit as claimed in claim 1：
When inputting three-phase first voltage, after being rectified into direct current by three phase rectifier bridge module (200), then pass through multiplication of voltage switching electricity
Road (500) connection voltage-multiplying circuit (600) carries out multiplication of voltage；
When inputting three-phase second voltage, direct current is rectified into by three phase rectifier bridge module (200) and exported；
In input single-phase first voltage, after being rectified into direct current by three phase rectifier bridge module (200), then pass through multiplication of voltage switching electricity
Road (500) connection voltage-multiplying circuit (600) carries out multiplication of voltage；
In input single-phase second voltage, direct current is rectified into by three phase rectifier bridge module (200) and exported.
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| CN201710662476.5A CN107425708A (en) | 2017-08-04 | 2017-08-04 | Auxiliary power circuit and its control method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115060956A (en) * | 2022-06-20 | 2022-09-16 | 中国第一汽车股份有限公司 | Three-phase motor voltage acquisition device, motor driving voltage detection system and vehicle |
| CN115145770B (en) * | 2022-06-30 | 2024-05-10 | 苏州浪潮智能科技有限公司 | Micro control unit switching circuit and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115060956A (en) * | 2022-06-20 | 2022-09-16 | 中国第一汽车股份有限公司 | Three-phase motor voltage acquisition device, motor driving voltage detection system and vehicle |
| CN115145770B (en) * | 2022-06-30 | 2024-05-10 | 苏州浪潮智能科技有限公司 | Micro control unit switching circuit and method |
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