CN205566096U - High voltage direct current wide region input power auxiliary power supply circuit - Google Patents
High voltage direct current wide region input power auxiliary power supply circuit Download PDFInfo
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- CN205566096U CN205566096U CN201620136237.7U CN201620136237U CN205566096U CN 205566096 U CN205566096 U CN 205566096U CN 201620136237 U CN201620136237 U CN 201620136237U CN 205566096 U CN205566096 U CN 205566096U
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Abstract
The utility model discloses a high voltage direct current wide region input power auxiliary power supply circuit, including main power transformer V1, and set up drive circuit and the starting circuit at main power transformer V1 voltage input end vin, drive circuit and starting circuit are parallelly connected mutually, and starting circuit connects PWM control chip, and PWM control chip is connected with supply circuit, drive circuit is connected with the pass breaking of contact. Utilize main power transformer to add auxiliary winding and do the supplementary power supply of one way, parallelly connected winding and the auxiliary winding N1 N2 who has snubber circuit in the former limit of main power transformer V1, vice limit utilizes outside flyback converter to do the supplementary power supply of multichannel around there being the supplementary power supply output winding of a plurality of. This circuit has reduced the source that generates heat among the electrical power generating system, improves stability, reduce the converter loss, improved efficiency, increased power density.
Description
Technical field
This utility model belongs to switch power technology field, relates to the scheme of a kind of high pressure auxiliary power supply, and it is full
Foot initial start-up is delayed to be disconnected start-up circuit, reduces circuit loss and heating, improves stability.
Background technology
Direct current input translator is exactly by the DC voltage of input, after high frequency chopping or high-frequency inversion, logical
Over commutation and filtering link, be converted into the voltage of required amplitude.HVDC input power supply is as unidirectional current
The part in source, has non-in regions such as solar energy, wind energy, railway and highway system, thermal power plant, water generating factories
Often it is widely applied.
Particularly point out: HVDC refers to the above voltage of 500V direct current；Wide scope refers to that ceiling voltage is preferably at least twice
Minimum voltage.
In high-voltage DC power supply scheme, no matter main power circuit uses full-bridge, multitube normal shock or many level
Any topology such as LLC, before main circuit starts, it is always necessary to one group or array small-power accessory power supply elder generation
Start, after first powering to main power control circuit, protection circuit, communicating circuit, display circuit etc., main merit
Rate circuit just starts work.Therefore, a perfect auxiliary power supply circuit design inputs power supply at HVDC
In particularly important.
Traditional implementation method mainly utilize main power transformer add auxiliary winding do single channel auxiliary power supply (as
Fig. 1) and utilize outer counter excitation circuit to do multichannel auxiliary power supply (such as Fig. 2)；
Utilize main power transformer add auxiliary winding do single channel auxiliary power supply (such as Fig. 1) circuit composition have power electricity
Resistance R1, stabilivolt Z1, shunt capacitance C1, pwm chip U1, from power transformation extract auxiliary
Winding N1, fast recovery diode D1, filter capacitor C2, current-limiting resistance R2 is helped to form；Its operation principle
For: after power-supply system powers on, first pass through resistance R1 and charge to electric capacity C1, when the voltage of electric capacity C1
When Vc reaches the startup voltage of control chip U1, U1 starts output PWM ripple, drives master power switch pipe
Starting working, auxiliary winding N1 starts to export square wave, after diode D1, electric capacity C2 rectifying and wave-filtering
Export effective DC voltage supply PWM driving chip U1 and other protection, display circuits etc..
Utilize outer counter excitation circuit do multichannel auxiliary power supply (such as Fig. 2) circuit composition have auxiliary transformer T1 with
And from auxiliary transformer draw from feedback winding N1, power resistor R1, stabilivolt Z1, shunt capacitance C1,
Pwm chip U1, fast recovery diode D1, filter capacitor C2, current-limiting resistance R2 composition and suction
Receive circuit 101, secondary output NS1, NS1...... (designing multiple-channel output according to demand)；Its operation principle
Winding is assisted to do single channel auxiliary power supply circuit theory to utilizing main power transformer to add similar, after system electrification,
First pass through R1 to power to pwm chip U1, meet voltage request to start output to be certainly to present as U1
Winding N1 starts output, exports stable DC and supply each control circuit after rectified filtering.
Either utilize main power transformer to add auxiliary winding to do single channel auxiliary power supply circuit and still utilize outer counter
Excitation circuit does multichannel auxiliary power supply circuits, all has one disadvantage in that, resistance R1 does and is not switched off when starting, when pressing
When can start design circuit according to minimum voltage, R1 resistance is typically chosen smaller, when having higher than minimum voltage
During the high input voltage of twice, starting current increases to more than twice, and the caloric value of resistance is according to current squaring
Relation increases, when circuit works long hours in specified or high pressure operating mode, the upper heating of R1 very seriously, time long
Between run and likely affect whole power module stability, even if lacking plus fan is cold, on the impact of efficiency also
The most serious.
Based on this, proposing a kind of HVDC width scope input power auxiliary power supply circuit is that this area is urgently to be resolved hurrily
Technical problem.
Utility model content
The purpose of this utility model is to provide a kind of HVDC width scope input power auxiliary power supply circuit, this electricity
Road can solve the problem that when circuit works long hours in specified or high pressure operating mode, and the upper heating of R1 is very serious, time long
Between run and likely affect whole power module stability, the problem the most serious on the impact of efficiency.
The purpose of this utility model is realized by following technical proposals.
A kind of HVDC width scope input power auxiliary power supply circuit, including main power transformer V1, and sets
Put at the drive circuit of main power transformer V1 voltage input end Vin and start-up circuit, described drive circuit and
Start-up circuit is in parallel, and start-up circuit connects pwm chip, and pwm chip connects power supply electricity
Road；Described drive circuit connects driving breaking circuit.
Further, described start-up circuit includes the resistance being connected in parallel on main power transformer V1 voltage input end Vin
R1, the drain electrode of resistance R1 connecting valve pipe Q1, the source electrode of switching tube Q1 connects and is parallel with the steady of electric capacity C1
Pressure pipe Z1, the grid of switching tube Q1 is connected with drive circuit.
Further, described drive circuit includes the resistance being connected in parallel on main power transformer V1 voltage input end Vin
R3, resistance R3 connect the stabilivolt Z2 being parallel with resistance R5 and electric capacity C5 respectively and are in series with resistance R4
The grid of resistance R4 and switching tube Q1 of stabilivolt Z3, series voltage stabilizing pipe Z3 be connected.
Further, described driving breaking circuit includes the switching tube Q2 being connected to the anode of stabilivolt Z3, opens
Close pipe Q2 grid and drain electrode connects electric capacity C4, resistance R7 in parallel, electric capacity C4, resistance R7 in parallel even
Meeting a stabilivolt Z4 being serially connected with resistance R6, stabilivolt Z4 anode connects auxiliary winding N2, assists winding
Connect on N2 outfan and have electric capacity C3 and rectifier tube D2.
Further, described power supply circuits include the resistance R2 being connected on pwm chip U1, resistance
R2 connects auxiliary winding N1, and auxiliary winding N1 outfan connects electric capacity C2 and rectifier tube D1.
Further, described auxiliary winding N1 and auxiliary winding N2 is wound on main power transformer V1 and does single channel
Auxiliary power supply.
Further, main power transformer V1 primary side winding includes being parallel with the winding of absorbing circuit, auxiliary winding
N1 and auxiliary winding N2, main power transformer V1 secondary is wound with several auxiliary power supplies output winding.
Further, described in be parallel with on the winding of absorbing circuit connection have switch, switch and be connected to PWM control
PWM filtering output resistance R6 on coremaking sheet U1 is connected.
The beneficial effects of the utility model are:
1, reduce the pyrotoxin in power-supply system, improve stability；
2, reduce transducer loose, improve efficiency, increase power density.
Accompanying drawing explanation
Fig. 1 be tradition utilize main power transformer add auxiliary winding make single channel auxiliary power supply circuit diagram；
Fig. 2 is that tradition utilizes outer counter excitation circuit to do multichannel auxiliary power supply circuit；
Fig. 3 is the circuit diagram that this utility model uses；
Fig. 4 is to utilize main power transformer to add auxiliary winding to do the improvement project of single channel auxiliary power supply；
Fig. 5 is the improvement project utilizing outer counter excitation circuit to do multichannel auxiliary power supply.
Detailed description of the invention
Below in conjunction with the accompanying drawings and this utility model is described further by embodiment.
This HVDC width scope input power auxiliary power supply circuit design is described below:
This programme such as Fig. 3, by power resistor R1, current-limiting resistance R2, R4, R6, divider resistance R3, R5,
R7, stabilivolt Z1, Z2, fast recovery rectifier diode D1, D2, filter capacitor C1, C2, C3, C4, C5,
Switching tube Q1, Q2, pwm chip U1 and auxiliary winding N1, N2 composition.
Main power transformer V1 voltage input end Vin is provided with drive circuit and start-up circuit, drive circuit
Being in parallel with start-up circuit, start-up circuit connects pwm chip, and pwm chip connects power supply
Circuit；Described drive circuit connects driving breaking circuit.
Wherein, resistance R1, switching tube Q1, stabilivolt Z1, electric capacity C1 form start-up circuit；Including parallel connection
In resistance R1, the drain electrode of resistance R1 connecting valve pipe Q1 of main power transformer V1 voltage input end Vin,
The source electrode of switching tube Q1 connects the stabilivolt Z1 being parallel with electric capacity C1, the grid of switching tube Q1 and drive circuit
It is connected.
Resistance R3, R4, R5, stabilivolt Z2, Z3, electric capacity C5 form drive circuit；Including being connected in parallel on master
The resistance R3, resistance R3 of power transformer V1 voltage input end Vin connect respectively be parallel with resistance R5 and
The stabilivolt Z2 of electric capacity C5 and the stabilivolt Z3, the resistance R4 of series voltage stabilizing pipe Z3 that are in series with resistance R4
It is connected with the grid of switching tube Q1.
Auxiliary winding N2, rectifier tube D2, stabilivolt Z4, electric capacity C3, C4, resistance R6, R7, switch
Pipe Q2 composition drives breaking circuit, including the switching tube Q2 of the anode being connected to stabilivolt Z3, switching tube
Q2 grid and drain electrode connect electric capacity C4, resistance R7 in parallel, electric capacity C4, resistance R7 in parallel and connect one
Being serially connected with the stabilivolt Z4 of resistance R6, stabilivolt Z4 anode connects auxiliary winding N2, assists winding N2
Connect on outfan and have electric capacity C3 and rectifier tube D2.
Auxiliary winding N1, rectifier tube D1, electric capacity C2, resistance R2 form power supply circuits, including being connected to
Resistance R2 on pwm chip U1, resistance R2 connect auxiliary winding N1, auxiliary winding N1 output
On end, connection has electric capacity C2 and rectifier tube D1.For the improvement of tradition two schemes, utilize main power transformation
Device adds auxiliary winding and is improvement project such as Fig. 4 of single channel auxiliary power supply, auxiliary winding N1 and auxiliary winding N2
It is wound on main power transformer V1 and does single channel auxiliary power supply.
Utilizing outer counter excitation circuit to be improvement project such as Fig. 5 of multichannel auxiliary power supply, main power transformer V1 is former
Limit winding includes being parallel with the winding of absorbing circuit, auxiliary winding N1 and auxiliary winding N2, main power transformation
Device V1 secondary is wound with several auxiliary power supplies output winding.It is parallel with on the winding of absorbing circuit connection to have out
Close, switch and be connected with the PWM filtering output resistance R6 being connected on pwm chip U1.
When after system electrification, resistance R3, R4, R5, stabilivolt Z2, Z3, electric capacity C5 forming driving electricity
Road first works, and when input voltage is more than set voltage of voltage regulation VZ3 after dividing potential drop, switching tube Q1 turns on,
Formed start-up circuit started working by resistance R1, switching tube Q1, stabilivolt Z1, electric capacity C1, it is provided that PWM
Control chip starts voltage, and after U1 starts working, auxiliary winding N1 exports respective rectangular ripple, rectified
Stable DC be exported to U1 and other protections, display electricity after the current rectifying and wave filtering circuit of pipe D1, electric capacity C2 composition
Road powers, on the other hand, when auxiliary winding start power supply after, by auxiliary winding N2, rectifier tube D2,
Stabilivolt Z4, electric capacity C3, C4, resistance R6, R7, switching tube Q2 composition drives breaking circuit to start work
Make, Q2 is open-minded so that the upper voltage drop of C3 is zero, Q1 shutoff, pwm chip power supply by assist around
Group N1 provides, and therefore, system is disconnected start-up circuit, decreases pyrotoxin, and system is more stable；Due to
The driving electric current of Q1 is minimum (microampere order), and the power consumption of R3, R5 is negligible.
Above content be combine that this utility model made by concrete preferred implementation the most specifically
Bright, it is impossible to assert that detailed description of the invention of the present utility model is only limitted to this, for technology belonging to this utility model
For the those of ordinary skill in field, without departing from the concept of the premise utility, it is also possible to if making
Dry simple deduction or replace, all should be considered as belonging to this utility model and be determined by the claims submitted to
Scope of patent protection.
Claims (8)
1. a HVDC width scope input power auxiliary power supply circuit, it is characterised in that: include main power
Transformator V1, and it is arranged on drive circuit and the start-up circuit of main power transformer V1 voltage input end Vin,
Described drive circuit and start-up circuit are in parallel, and start-up circuit connects pwm chip, and PWM controls core
Sheet connects power supply circuits；Described drive circuit connects breaking circuit.
A kind of HVDC width scope input power auxiliary power supply circuit the most according to claim 1, its
It is characterised by: described start-up circuit includes being connected in parallel on the resistance of main power transformer V1 voltage input end Vin
R1, the drain electrode of resistance R1 connecting valve pipe Q1, the source electrode of switching tube Q1 connects and is parallel with the steady of electric capacity C1
Pressure pipe Z1, the grid of switching tube Q1 is connected with drive circuit.
A kind of HVDC width scope input power auxiliary power supply circuit the most according to claim 1, its
It is characterised by: described drive circuit includes being connected in parallel on the resistance of main power transformer V1 voltage input end Vin
R3, resistance R3 connect the stabilivolt Z2 being parallel with resistance R5 and electric capacity C5 respectively and are in series with resistance R4
The grid of resistance R4 and switching tube Q1 of stabilivolt Z3, series voltage stabilizing pipe Z3 be connected.
A kind of HVDC width scope input power auxiliary power supply circuit the most according to claim 1, its
It is characterised by: described breaking circuit includes being connected to the switching tube Q2 of the anode of stabilivolt Z3, switching tube Q2
Grid and drain electrode connect electric capacity C4, resistance R7 in parallel, electric capacity C4, resistance R7 in parallel and connect a string
Being connected to the stabilivolt Z4 of resistance R6, stabilivolt Z4 anode connects auxiliary winding N2, auxiliary winding N2 output
On end, connection has electric capacity C3 and rectifier tube D2.
A kind of HVDC width scope input power auxiliary power supply circuit the most according to claim 1, its
It is characterised by: described power supply circuits include the resistance R2, resistance R2 being connected on pwm chip U1
Connecting auxiliary winding N1, auxiliary winding N1 outfan connects electric capacity C2 and rectifier tube D1.
A kind of HVDC width scope input power auxiliary power supply circuit the most according to claim 1, its
It is characterised by: described auxiliary winding N1 and auxiliary winding N2 is wound on that to do single channel on main power transformer V1 auxiliary
Help power supply.
A kind of HVDC width scope input power auxiliary power supply circuit the most according to claim 1, its
It is characterised by: main power transformer V1 primary side winding includes being parallel with the winding of absorbing circuit, auxiliary winding
N1 and auxiliary winding N2, main power transformer V1 secondary is wound with several auxiliary power supplies output winding.
A kind of HVDC width scope input power auxiliary power supply circuit the most according to claim 7, its
Be characterised by: described in be parallel with on the winding of absorbing circuit connection have switch, switch and be connected to PWM control
PWM filtering output resistance R6 on chip U1 is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620136237.7U CN205566096U (en) | 2016-02-23 | 2016-02-23 | High voltage direct current wide region input power auxiliary power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620136237.7U CN205566096U (en) | 2016-02-23 | 2016-02-23 | High voltage direct current wide region input power auxiliary power supply circuit |
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| Publication Number | Publication Date |
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| CN205566096U true CN205566096U (en) | 2016-09-07 |
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| CN201620136237.7U Active CN205566096U (en) | 2016-02-23 | 2016-02-23 | High voltage direct current wide region input power auxiliary power supply circuit |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106684814A (en) * | 2017-03-23 | 2017-05-17 | 广州市爱浦电子科技有限公司 | High-precision normal-shock switch power output overvoltage protection circuit |
| CN107257192A (en) * | 2017-05-19 | 2017-10-17 | 苏州汇川联合动力系统有限公司 | A kind of passive electric discharge device and electric machine controller |
| CN110208597A (en) * | 2019-05-23 | 2019-09-06 | 宁波大学 | A kind of self-power wireless current monitoring system based on simplex winding current transformer |
| CN114243642A (en) * | 2021-12-31 | 2022-03-25 | 东莞欧陆通电子有限公司 | Undervoltage protection circuit and switching power supply thereof |
| CN117498704A (en) * | 2023-12-29 | 2024-02-02 | 威胜能源技术股份有限公司 | Flyback power supply circuit for charging pile of charging and replacing cabinet and use method of flyback power supply circuit |
-
2016
- 2016-02-23 CN CN201620136237.7U patent/CN205566096U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106684814A (en) * | 2017-03-23 | 2017-05-17 | 广州市爱浦电子科技有限公司 | High-precision normal-shock switch power output overvoltage protection circuit |
| CN107257192A (en) * | 2017-05-19 | 2017-10-17 | 苏州汇川联合动力系统有限公司 | A kind of passive electric discharge device and electric machine controller |
| CN110208597A (en) * | 2019-05-23 | 2019-09-06 | 宁波大学 | A kind of self-power wireless current monitoring system based on simplex winding current transformer |
| CN110208597B (en) * | 2019-05-23 | 2021-04-23 | 宁波大学 | Self-powered wireless current monitoring system based on single-winding current transformer |
| CN114243642A (en) * | 2021-12-31 | 2022-03-25 | 东莞欧陆通电子有限公司 | Undervoltage protection circuit and switching power supply thereof |
| CN117498704A (en) * | 2023-12-29 | 2024-02-02 | 威胜能源技术股份有限公司 | Flyback power supply circuit for charging pile of charging and replacing cabinet and use method of flyback power supply circuit |
| CN117498704B (en) * | 2023-12-29 | 2024-03-29 | 威胜能源技术股份有限公司 | Flyback power supply circuit for charging pile of charging and replacing cabinet and use method of flyback power supply circuit |
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