CN107046363A - A kind of start-up circuit of Switching Power Supply for inverter - Google Patents
A kind of start-up circuit of Switching Power Supply for inverter Download PDFInfo
- Publication number
- CN107046363A CN107046363A CN201710190390.7A CN201710190390A CN107046363A CN 107046363 A CN107046363 A CN 107046363A CN 201710190390 A CN201710190390 A CN 201710190390A CN 107046363 A CN107046363 A CN 107046363A
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- CN
- China
- Prior art keywords
- power supply
- circuit
- switching power
- resistance
- capacitance
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- 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.)
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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
Abstract
The present invention discloses a kind of start-up circuit of the Switching Power Supply for inverter, and the coil of relay is connected with relay-operated controller, and relay includes normally opened contact, normally-closed contact and public point；The positive output end of direct current output module is connected with normally opened contact and public point respectively；The positive pole of normally-closed contact, startup resistance and start-up capacitance is sequentially connected, and the negative pole of start-up capacitance is connected with the negative output terminal of direct current output module；The positive pole of start-up capacitance is connected with the power end of drive circuit and the negative electrode of diode respectively, the output end connection of the anode of diode and the assists winding of Switching Power Supply, and the input of assists winding and the negative pole of start-up capacitance are connected；The input connection of the primary side Exciting Windings for Transverse Differential Protection of public point and Switching Power Supply, the output end of primary side Exciting Windings for Transverse Differential Protection and the input of drive circuit are connected, and the output end of drive circuit is connected with the negative output terminal of direct current output module.The start-up circuit of the present invention, starts resistance and completes to break from high tension loop after starting work.
Description
Technical field
The present invention relates to the start-up circuit in inverter field, more particularly to a kind of Switching Power Supply for inverter.
Background technology
In the related product of inverter, it controls circuit to need to provide isolation stable power supply electricity by Switching Power Supply
Source.And Switching Power Supply needs to provide a starting current to switch drive chip on startup, start once Switching Power Supply starts
Work, it is possible to give switch drive chip power supply by the assists winding of Switching Power Supply itself, start-up circuit originally does not have then
Real value, start-up circuit is no longer participate in circuit work.All it is from direct current by one or more resistance in prior art
Power taking is to operating current lasting to chip offer on switch drive chip on bus, after Switching Power Supply completes start-up course,
The circuit can not spin off from high direct voltage bus bar circuit.Start resistance to complete after its startup work, be still articulated in straight
Flow in high tension loop.As long as because there is voltage at resistance two ends, will produce electric current, current flowing resistance just necessarily leads to heat damage
Consumption.Therefore, there is prolonged heating in startup resistance of the prior art, lasting to produce loss, can not only shorten startup resistance
The heating of the service life of itself, waste electric energy, and startup resistance also results in the environment temperature rise of machine inner space,
Reduce the working life of other components.Therefore, how a kind of start-up circuit of the Switching Power Supply for inverter is provided, makes to open
Dynamic resistance completes to break from high tension loop after starting work, the technical problem as those skilled in the art's urgent need to resolve.
The content of the invention
It is an object of the invention to provide a kind of start-up circuit of the Switching Power Supply for inverter, start resistance and complete to start
It can be broken after work from high tension loop.
To achieve the above object, the invention provides following scheme：
A kind of start-up circuit of Switching Power Supply for inverter, the start-up circuit is connected with Switching Power Supply, described to open
Dynamic circuit includes：Direct current output module, relay, relay-operated controller starts resistance, start-up capacitance, diode, driving electricity
Road, wherein,
The coil of the relay is connected with relay-operated controller, the relay include normally opened contact, normally-closed contact and
Public point；
The positive output end of the direct current output module is connected with the normally opened contact and the public point respectively；It is described normal
The positive pole of closed contact, the startup resistance and the start-up capacitance is sequentially connected, the negative pole of the start-up capacitance and the direct current
The negative output terminal connection of output module；
The positive pole of the start-up capacitance is connected with the power end of the drive circuit and the negative electrode of the diode respectively, institute
The anode for stating diode is connected with the output end of the assists winding of the Switching Power Supply, the input of the assists winding with it is described
The negative pole connection of start-up capacitance；
The public point is connected with the input of the primary side Exciting Windings for Transverse Differential Protection of the Switching Power Supply, the primary side Exciting Windings for Transverse Differential Protection
Output end be connected with the input of the drive circuit, the output end of the drive circuit and the direct current output module it is negative
Output end is connected.
Optionally, the drive circuit is specifically included：Driving chip, driving resistance and power switch pipe, wherein, it is described to open
The positive pole of dynamic condenser is connected with the power end of the driving chip, the output end of the driving chip and the one of the driving resistance
End connection, the other end of the driving resistance is connected with the control end of the power switch pipe, the input of the power switch pipe
End is connected with the output end of the primary side Exciting Windings for Transverse Differential Protection of the Switching Power Supply, and the output end of the power switch pipe and the direct current are defeated
Go out the negative output terminal connection of module.
Optionally, the start-up circuit also includes buffer resistance, and the buffer resistance is arranged on the direct current output module
Positive output end and the public point between.
The specific embodiment provided according to the present invention, the invention discloses following technique effect：
The present invention is connected indirectly by the normally-closed contact of relay by resistance is started with high direct voltage bus, to Switching Power Supply
Starting current is provided.After capacitance group charging complete in major loop, relay-operated controller, which sends control command, makes relay
Coil obtains electric, and the connection of the normally-closed contact and public point of relay disconnects, and starts resistance and is cut out from high voltage dc bus.This
Afterwards, start resistance not producing heat completely without power consumption, reduce the pressure of device interior environment temperature, improve inside
The service life of component, is conducive to the reliability of integral lifting apparatus.Moreover, charging resistor can use resistance and power more
Small resistance, make its on circuit boards shared space it is smaller, lifted pcb board space availability ratio.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to institute in embodiment
The accompanying drawing needed to use is briefly described, it should be apparent that, drawings in the following description are only some implementations of the present invention
Example, for those of ordinary skill in the art, on the premise of not paying creative work, can also be obtained according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is the circuit diagram of traditional start-up circuit；
Fig. 2 is the circuit diagram of the start-up circuit of the embodiment of the present invention 1.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
It is an object of the invention to provide a kind of start-up circuit of the Switching Power Supply for inverter, start resistance and complete to start
It can be broken after work from high tension loop.
In order to facilitate the understanding of the purposes, features and advantages of the present invention, it is below in conjunction with the accompanying drawings and specific real
Applying mode, the present invention is further detailed explanation.
As shown in figure 1, cut-offfing the start-up circuit of power supply be traditionally used for inverter, start resistance R1Complete to start
After work, still it is articulated in high direct voltage loop, it is impossible to broken from high tension loop.Start resistance R1Energy is persistently produced to damage
Consume and generate heat, its heat can cause the rise of machine interior environment temperature, the service life of itself and other components can be reduced.
Embodiment 1：As shown in Fig. 2 the start-up circuit that the present invention is provided is connected with Switching Power Supply 20, start-up circuit includes：
Direct current output module 21, relay 22, relay-operated controller 23 starts resistance 24, start-up capacitance 25, diode 26, driving electricity
Road 27, buffer resistance 28, wherein,
Direct current output module 21 in the present embodiment is the rectification circuit being connected with ac input end；
Switching Power Supply 20 includes primary side Exciting Windings for Transverse Differential Protection 201 and assists winding 202, and assists winding 202 belongs to Switching Power Supply
Can be according to concrete application demand in one vice-side winding, actual design, Switching Power Supply 20 can also increase some other secondary of setting
Needed according to practical application to be additionally arranged tri- vice-side windings of 203-205 in winding, the present embodiment.
The coil 220 of relay 22 is connected with relay-operated controller 23, the relay 22 include normally opened contact 221, often
Closed contact 222 and public point 223；
The one end of the positive output end of rectification circuit 21 respectively with normally opened contact 221 and buffer resistance 28 is connected, buffer resistance
28 other end is connected with public point 223；The positive pole of normally-closed contact 222, startup resistance 24 and start-up capacitance 25 is sequentially connected,
The negative pole of start-up capacitance 25 is connected with the negative output terminal of rectification circuit 21；
The positive pole of start-up capacitance 25 is connected with the power end of drive circuit 27 and the negative electrode of diode 26 respectively, diode 26
Anode and Switching Power Supply 20 assists winding 202 output end, i.e. 2021 ends connection, the input of assists winding 202, i.e.,
2022 ends are connected with the negative output terminal of the rectification circuit 21；
Public point 223 and the input of the primary side Exciting Windings for Transverse Differential Protection 201 of Switching Power Supply 20, i.e. 2011 ends connection, the original
The output end of side Exciting Windings for Transverse Differential Protection 201, i.e. 2012 ends are connected with the input of drive circuit 27, the output end of drive circuit 27 with it is whole
The negative output terminal connection of current circuit 21.
Specifically, drive circuit 27 is specifically included：Driving chip 271, driving resistance 272 and power switch pipe 273, its
In, the positive pole of start-up capacitance 25 is connected with the power end of driving chip 271, output end and the driving resistance 272 of driving chip 271
One end connection, driving resistance 272 the other end be connected with the control end of power switch pipe 273, the input of power switch pipe 273
End and the output end of the primary side Exciting Windings for Transverse Differential Protection 201 of Switching Power Supply 20, i.e. 2012 ends connection, the output end of power switch pipe 273 with
The negative output terminal connection of rectification circuit 21.
Alternatively, power switch pipe 273 is metal-oxide half field effect transistor (Metal-Oxide-Semiconductor
Field-Effect Transistor, MOSFET)；Startup resistance 24 is Chip-R；Start-up capacitance 25 is polar capacitor；Drive
Dynamic chip 271 is PWM driving chips.
After electricity on inverter, it will be applied in immediately between the positive output end P and negative output terminal N of dc bus before coming from
The DC high voltage of level direct current output module 21, the wherein DC high voltage of prime can be alternating currents in this example via whole
Current circuit rectification and come or other modes such as photovoltaic generation export DC high voltage.Direct current output module 21 is defeated
While the main capacitance group that the DC high voltage gone out is given in follow-up major loop by buffer resistance 28 charges, pass through buffer resistance
28th, the public point 223 of relay 22, the normally-closed contact 222 of relay 22 and startup resistance 24 charge to start-up capacitance 25, fill
Electric current is I1.
When the voltage on start-up capacitance 25 reaches the power-on voltage of driving chip 271, driving chip 271 starts work
Make, the output end of driving chip 271 inputs driving pulse to the control end of power switch pipe 273, and driving power switching tube 273 is led
Logical and shut-off.The periodic turn-on and turn-off of power switch pipe 273 cause the DC high voltage that direct current output module 21 is exported to enter
The change of line period, periodically variable DC high voltage is added in the two ends of primary side Exciting Windings for Transverse Differential Protection 201, and the electric energy of change passes through
Primary side Exciting Windings for Transverse Differential Protection 201 is converted to the magnetic field of change, and magnetic field is coupled in other each vice-side windings by the magnetic core of transformer, root
Energy distribution is carried out according to the number of turn ratio of each winding and primary side Exciting Windings for Transverse Differential Protection.Therefore, once power switch pipe 273 starts periodically
Turn-on and turn-off, assists winding 202 will soon obtain corresponding electric energy, by giving start-up capacitance 25 after the rectification of diode 26
Charging, so that start-up capacitance 25 persistently can power to driving chip 271, maintains the normal work of Switching Power Supply.
When the voltage of major loop capacitance group reaches given threshold, relay-operated controller 23, which sends control signal, makes relay
22 coil 202 is powered, and normally-closed contact 222 is converted to off-state with public point 223 by original connection status, normally opened to touch
Point 221 is connected with public point 223.Now, buffer resistance 28 is short-circuited, and is started resistance 24 and then taken off from original current loop
From original charging current I1Disappear.Circuit is charged by the assists winding 202 of Switching Power Supply 20 itself to start-up capacitance 25,
To maintain the normal work of Switching Power Supply 20.
After Switching Power Supply normal work, relay-operated controller 23 will send control command after capacitance group charging complete, lead to
Cross relay 22 and cut out resistance is started from high voltage dc bus.Hereafter, start resistance 28 and power consumption and heat condition be not present,
Start resistance 28 and be served only for the start-up course of short time, therefore small-sized Chip-R can be selected.
The embodiment of each in this specification is described by the way of progressive, and what each embodiment was stressed is and other
Between the difference of embodiment, each embodiment identical similar portion mutually referring to.
Specific case used herein is set forth to the principle and embodiment of the present invention, and above example is said
The bright method and its core concept for being only intended to help to understand the present invention；Simultaneously for those of ordinary skill in the art, foundation
The thought of the present invention, will change in specific embodiments and applications.In summary, this specification content is not
It is interpreted as limitation of the present invention.
Claims (3)
1. a kind of start-up circuit of Switching Power Supply for inverter, the start-up circuit is connected with Switching Power Supply, its feature exists
In the start-up circuit includes：Direct current output module, relay, relay-operated controller starts resistance, start-up capacitance, two poles
Pipe, drive circuit, wherein,
The coil of the relay is connected with relay-operated controller, and the relay includes normally opened contact, normally-closed contact and public
End points；
The positive output end of the direct current output module is connected with the normally opened contact and the public point respectively；It is described normally closed tactile
The positive pole of point, the startup resistance and the start-up capacitance is sequentially connected, the negative pole of the start-up capacitance and the direct current output
The negative output terminal connection of module；
The positive pole of the start-up capacitance is connected with the power end of the drive circuit and the negative electrode of the diode respectively, and described two
The anode of pole pipe is connected with the output end of the assists winding of the Switching Power Supply, and the input of the assists winding starts with described
The negative pole connection of electric capacity；
The public point is connected with the input of the primary side Exciting Windings for Transverse Differential Protection of the Switching Power Supply, the primary side Exciting Windings for Transverse Differential Protection it is defeated
Go out end to be connected with the input of the drive circuit, the negative output of the output end of the drive circuit and the direct current output module
End connection.
2. the start-up circuit of the Switching Power Supply according to claim 1 for inverter, it is characterised in that the driving electricity
Road is specifically included：Driving chip, driving resistance and power switch pipe, wherein, the positive pole of the start-up capacitance and the driving core
The power end connection of piece, the output end of the driving chip is connected with one end of the driving resistance, described to drive the another of resistance
One end is connected with the control end of the power switch pipe, and the input of the power switch pipe and the primary side of the Switching Power Supply are encouraged
The output end connection of magnetic winding, the output end of the power switch pipe is connected with the negative output terminal of the direct current output module.
3. the start-up circuit of the Switching Power Supply according to claim 1 for inverter, it is characterised in that the startup electricity
Road also include buffer resistance, the buffer resistance be arranged on the direct current output module positive output end and the public point it
Between.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710190390.7A CN107046363A (en) | 2017-03-28 | 2017-03-28 | A kind of start-up circuit of Switching Power Supply for inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710190390.7A CN107046363A (en) | 2017-03-28 | 2017-03-28 | A kind of start-up circuit of Switching Power Supply for inverter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107046363A true CN107046363A (en) | 2017-08-15 |
Family
ID=59544263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710190390.7A Pending CN107046363A (en) | 2017-03-28 | 2017-03-28 | A kind of start-up circuit of Switching Power Supply for inverter |
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| Country | Link |
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| CN (1) | CN107046363A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI704753B (en) * | 2019-07-05 | 2020-09-11 | 宏碁股份有限公司 | Power conversion apparatus |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06165520A (en) * | 1992-11-18 | 1994-06-10 | Matsushita Electric Ind Co Ltd | Relay drive device of inverter |
| CN102130596A (en) * | 2011-01-27 | 2011-07-20 | 广州金升阳科技有限公司 | Switching converter with wide input voltage range |
| CN204425174U (en) * | 2014-12-16 | 2015-06-24 | 阳光电源股份有限公司 | Switching Power Supply and accessory power supply thereof |
-
2017
- 2017-03-28 CN CN201710190390.7A patent/CN107046363A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06165520A (en) * | 1992-11-18 | 1994-06-10 | Matsushita Electric Ind Co Ltd | Relay drive device of inverter |
| CN102130596A (en) * | 2011-01-27 | 2011-07-20 | 广州金升阳科技有限公司 | Switching converter with wide input voltage range |
| CN204425174U (en) * | 2014-12-16 | 2015-06-24 | 阳光电源股份有限公司 | Switching Power Supply and accessory power supply thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI704753B (en) * | 2019-07-05 | 2020-09-11 | 宏碁股份有限公司 | Power conversion apparatus |
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| PB01 | Publication | ||
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Application publication date: 20170815 |