CN207801764U - A kind of switching power unit of new energy access power distribution network - Google Patents
A kind of switching power unit of new energy access power distribution network Download PDFInfo
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- CN207801764U CN207801764U CN201820040254.XU CN201820040254U CN207801764U CN 207801764 U CN207801764 U CN 207801764U CN 201820040254 U CN201820040254 U CN 201820040254U CN 207801764 U CN207801764 U CN 207801764U
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Abstract
This application involves the switching power units that electrical equipment technical field more particularly to a kind of new energy access power distribution network.The switching power unit, including：First input end, the second input, output end, input rectifying filter circuit, EFD30 types transformer, output rectifier and filter and control circuit.The switching power unit uses single switch flyback formula circuit, and IXBH5N160 types main power tube and SG3842AD1 types control chip are used in control circuit.Due to IXBH5N160 type main power tubes have the characteristics that it is high voltage bearing; SG3842AD1 types control chip has the function of under-voltage restriction, overcurrent protection etc.; other devices in circuit can also be protected well by breaking down when input voltage is higher; therefore; its accessible maximum voltage value is larger; accessible voltage range is wider, is suitable for New-energy power system.
Description
Technical field
This application involves the Switching Power Supply dresses that electrical equipment technical field more particularly to a kind of new energy access power distribution network
It sets.
Background technology
With the fast development of China's New Energy Industry, the new energy such as solar energy, wind energy are linked into power train on a large scale
In power grid under unified central planning.But the voltage that grid-connected power generation system directly generates is usually DC voltage, therefore, it is necessary to pass through inversion
Device converts after alternating voltage DC voltage to and can just be linked into power distribution network.And inverter is then needed in switching power unit
It could be worked normally under the drive of the stable DC voltage provided.
The input terminal of switching power unit is usually directly connected to the output end of grid-connected power generation system, by generation of electricity by new energy
The voltage of system output is transformed into stable voltage, so that inverter uses.Under normal conditions, grid-connected power generation system exports
Voltage fluctuation is larger, and the maximum voltage value of output also can be higher.For example, in photovoltaic generating system, with sunlit strong
Degree is different, and the voltage swing of photovoltaic array input switch supply unit is just different, and voltage range is usually in DC120V-
It is fluctuated between DC1200V, the maximum voltage value of output is DC1200V.Currently, switching power unit usually all includes input electricity
Road, transformer, output circuit and control circuit, the DC voltage of fluctuation is converted into stabilization under the action of control circuit
DC voltage provides electric energy to electrical appliance.
However, due to the component pressure poor performance in the control circuit of existing switching power unit, it is caused to can access
Maximum voltage value it is smaller, accessible voltage range is relatively narrow, therefore, is not suitable for New-energy power system.
Utility model content
This application provides the switching power units that a kind of new energy accesses power distribution network, are filled with solving existing Switching Power Supply
Set that accessible maximum voltage value is smaller, accessible voltage range is relatively narrow, the problem of not being suitable for New-energy power system.
A kind of switching power unit of new energy access power distribution network, including：First input end, the second input, output end,
Input rectifying filter circuit, EFD30 types transformer, output rectifier and filter and control circuit, wherein
The first input end is connect with the input rectifying filter circuit, the input rectifying filter circuit and the change
Primary coil of depressor connects, and the secondary coil of the transformer is connect with the output rectifier and filter, the output rectification filter
Wave circuit is connect with the output end；The control circuit is connected to the input rectifying filter circuit and output rectification filter
Between wave circuit；
The control circuit includes IXBH5N160 types main power tube, SG3842AD1 types control chip and Voltage Feedback dress
It sets；One end of the voltage feedback device is connect with the output rectifier and filter, and the other end is connect with the chip；It is described
One end of main power tube is connect with the input rectifying filter circuit, and the other end is connect with the chip；
Second input terminal is connect with the chip.
Optionally, the voltage feedback device includes pc817 types photoelectrical coupler and light emitting diode, the photoelectric coupling
Device is connect with the chip, and the light emitting diode is connect with the output rectifier and filter.
Optionally, the control circuit further includes zener diode, and the zener diode is connected to the output rectification
Between filter circuit and the voltage feedback device.
Optionally, the zener diode is TL431CLP type zener diodes.
Optionally, the switching power unit further includes primary filter circuit, and the primary filter circuit is connected to described
Between first input end and the input rectifying filter circuit.
Optionally, the switching frequency of main power tube any value between 25-30kHz.
Technical solution provided by the present application includes following advantageous effects：
Switching power unit provided by the present application uses single switch flyback formula circuit, and is used in control circuit
IXBH5N160 types main power tube and SG3842AD1 types control chip.Since IXBH5N160 type main power tubes are with high voltage bearing
Feature, SG3842AD1 types control chip have the function of under-voltage restriction, overcurrent protection etc., break down when input voltage is higher
Other devices in circuit can also be protected well, and therefore, accessible maximum voltage value is larger, accessible voltage range
It is wider, it is suitable for New-energy power system.
Description of the drawings
In order to illustrate more clearly of the technical solution of the application, letter will be made to attached drawing needed in the embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without having to pay creative labor,
Other drawings may also be obtained based on these drawings.
Fig. 1 is the switching power unit that a kind of new energy provided by the embodiments of the present application accesses power distribution network.
Reference sign：
1, primary filter circuit；2, input rectifying filter circuit；3, output rectifier and filter；4, control circuit.
Specific implementation mode
Referring to Fig. 1, a kind of switching power unit of new energy access power distribution network provided by the embodiments of the present application.Switch electricity
Source device includes：First input end VIN1, the second input terminal VIN2, output end OUT, input rectifying filter circuit, EFD30 types become
Depressor, output rectifier and filter and control circuit, wherein the first input end VIN1 and the input rectifying filter circuit
Connection, the input rectifying filter circuit connect with primary coil of the transformer, the secondary coil of the transformer with it is described defeated
Go out current rectifying and wave filtering circuit connection, the output rectifier and filter is connect with the output end OUT；The control circuit is connected to
Between the input rectifying filter circuit and the output rectifier and filter；The second input terminal VIN2 connects with following chips
It connects.
In the present embodiment, the switching power unit further includes primary filter circuit, the primary filter circuit connection
Between the first input end VIN1 and the input rectifying filter circuit, for filtering the input switching power unit
Harmonic wave.The primary filter circuit includes that capacitor C1 and capacitor C2, the capacitor C1 and the capacitor C2 go here and there successively
It is associated between first input end VIN1 and input grounding end.
In the present embodiment, the input rectifying filter circuit includes capacitor C3, resistance R1, diode D1 and diode
D2.One end of the capacitor C3 is connect with first input end VIN1, and the other end of the capacitor C3 has been sequentially connected in series described
The both ends of the diode D1 and diode D2, the capacitor C3 are parallel with the resistance R1.
In the present embodiment, primary coil of the transformer T1 is in parallel with the input rectifying filter circuit, the transformation
The secondary coil of device T1 is in parallel with the output rectifier and filter.
The EFD30 types transformer has size small, and height is low, cheap, and reliability is high, is convenient for the dress of Switching Power Supply
The installation set.In addition, the transformer is additionally provided with the FERRITE CORE of flat type, shape can meet that power transformer is high-power to be wanted
It asks.
In the present embodiment, the output rectifier and filter includes capacitor C4, capacitor C5, capacitor C6, capacitance
Device C7, resistance R2, inductance L1 and diode D3.The capacitor C5, capacitor C6 and capacitor C7 with the transformer T1
Secondary coil it is in parallel, be in series with diode D3 between the secondary coil and capacitor C5 of the transformer T1；The resistance R2 and electricity
After container C4 series connection, it is parallel to the both ends the diode D3；It connects between the capacitor C5 and the capacitor C6
State inductance L1；One end of the capacitor C7 is connect with the output ground terminal, the other end and output end of the capacitor C7
OUT connections.
The control circuit includes IXBH5N160 types main power tube, SG3842AD1 types control chip and Voltage Feedback dress
It sets；One end of the voltage feedback device is connect with the output rectifier and filter, and the other end is connect with the chip；It is described
One end of main power tube is connect with the input rectifying filter circuit, and the other end is connect with the chip.
IXBH5N160 type main power tubes have the characteristics that it is high voltage bearing, actual measurement high pressure in 1900V, switching frequency is
Any value between 25-30kHz, for example, 30kHz.
The SG3842AD1 types control chip includes resistance RT/CT pins, VFB pins, ISEN pins, GND pins, VCC
Pin, COMP pins, V resistance REF pins and OUT pins.Its operating voltage=16~34V, maximum power dissipation=1W, oscillator frequency
Rate >=500kHz, reference voltage=5V, voltage regulation factor=6mV, current regulation=6mA, output end OUT maximum currents=
1000mA, maximum duty cycle=95%.The chip has the function of under-voltage restriction, overcurrent protection etc., goes out when input voltage is higher
Existing failure can also protect other devices in circuit well.The device has good line regulation and adjustment of load simultaneously
The features such as rate, outward element is few, voltage regulation factor can be compared with linear voltage regulator.
The voltage feedback device includes pc817 type photoelectrical coupler Q1 and light emitting diode D6, the photoelectrical coupler
Q1 is connect with the chip, and the light emitting diode D6 is connect with the output rectifier and filter.
The control circuit further includes zener diode, and the zener diode is connected to the output rectifier and filter
Between the voltage feedback device.The zener diode is TL431CLP type zener diodes.
In the present embodiment, the control circuit includes IXBH5N160 type main power tube Q2, SG3842AD1 types control core
Piece U1, pc817 type photoelectrical coupler Q1, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, electricity
Hinder R10, resistance R11, resistance R12, resistance R13, resistance R14, resistance R15, capacitor C8, capacitor C9, capacitor C10, electricity
Container C11, capacitor C12, capacitor C13, zener diode D5, light emitting diode D6, diode D7.
One end of the resistance R3, resistance R4 and resistance R6 are connected with diode D3 and inductance L1 with the capacitor C6
One end connection, the light emitting diode D6 is connected between the other end and the other end of resistance R4 of the resistance R3, it is described
The other end of resistance R6 is connected with the resistance R7, is connected between the other end of the resistance R7 and the resistance R4 described steady
Press diode.After the resistance R5 and capacitor C8 series connection, it is parallel to the both ends the zener diode D5.The photoelectricity
Coupler Q1 is correspondingly arranged with the light emitting diode D6, and the both ends of the photoelectrical coupler Q1 are parallel with the capacitor C9.
One end of the capacitor C9 is grounded, and the other end of the capacitor C9 is connect with the COMP pins of the chip.
The second input terminal VIN2 is connect by resistance R9 with the VCC pins of the chip, the resistance R9 and described
Circuit between VCC pins is connect with one end of the capacitor C12, capacitor C13 respectively, the capacitor C13 and described
The other end of capacitor C12 is grounded and is connect with one end of the capacitor C10；The other end of the capacitor C10 and institute
The TR/CT pins connection of chip is stated, and is connect with the COMP pins of the chip by the resistance R15, the resistance R8.
The D pins of the main power tube Q2 are connected on the circuit between the diode D2 and the transformer T1, institute
The G pins for stating main power tube are connect with one end of one end of resistance R12 and resistance R13, and the other end of the resistance R13 passes through electricity
Resistance R14 is connect with the OUT pins of the chip, and the both ends of the resistance R13 are parallel with the diode D7.The main power tube
S pins respectively with one end of the resistance R10, one end of the resistance R11, the other end of the resistance R12 and the electricity
Hinder one end connection of R13, the other end ground connection of the resistance R11, one end of the other end and capacitor C11 of the resistance R10
It is connected with the ISEN pins, the other end of the capacitor C11 is connect with the GND pins of the chip, and is grounded.Work as institute
It will stop exporting the pulse output of the OUT pins when voltage of ISEN pins application is stated more than 1V, ensure that will not
Power supply is burnt out because of the load excessive applied, to protect the main power tube and the transformer.
Optionally, the diode D1, diode D2 are UF4007 type diodes, and diode D3 is two pole of MUR460 types
Pipe, D7 are 4148 type diodes, and the inductance L1 is 2UH type inductance.
Illustratively, in the present embodiment, as R1=330K Ω, R2=20 Ω, R3=530 Ω, R4=1000 Ω, R5=
10K Ω, R6=10K Ω, R7=10K Ω, R8=2K Ω, R10=20 Ω, R11=2 Ω, R12=15K Ω, R13=12 Ω,
R14=15 Ω, R15=15 Ω；Capacitor C1, capacitor C2 are 224/X2 type capacitors, and capacitor C3 is 220/1KV type capacitances
Device, capacitor C4 are 331/1KV type capacitors, and capacitor C5, capacitor C6, capacitor C7 are 330U/50V capacitors, capacitance
Device C8, capacitor C9 are 104 type capacitors, and capacitor C10, capacitor C11 are 102 type capacitors, and capacitor C12 is 47u types
Capacitor, capacitor C13 are 104 type capacitors, and when the former secondary coil ratio of transformer is 7.5, which can incite somebody to action
The voltage of DC120V-1200V is converted into DC15V/30W accessory power supplys, and power supply is provided to inverter control in photovoltaic generating system.
Switching power unit provided by the present application uses single switch flyback formula circuit, and is used in control circuit
IXBH5N160 types main power tube and SG3842AD1 types control chip.Since IXBH5N160 type main power tubes are with high voltage bearing
Feature, SG3842AD1 types control chip have the function of under-voltage restriction, overcurrent protection etc., break down when input voltage is higher
Other devices in circuit can also be protected well, accessible maximum voltage value is larger, and accessible voltage range is wider,
Suitable for New-energy power system.In addition, switching power unit provided by the present application also has due to voltage spikes small, power supply output is steady
It is fixed, the shorter feature of voltage rising time.
It should be noted that the relational terms of such as " first " and " second " or the like be used merely to an entity or
Operation is distinguished with another entity or operation, and without necessarily requiring or implying between these entities or operation, there are any
This actual relationship or sequence.Moreover, the terms "include", "comprise" or its any other variant be intended to it is non-exclusive
Property include but also include not having so that article or equipment including a series of elements include not only those elements
The other element being expressly recited, or further include for elements inherent to such a process, method, article, or device.Do not having
There is the element limited by sentence "including a ..." in the case of more limiting, it is not excluded that in the mistake for including the element
There is also other identical elements in journey, method, article or equipment.
The above is only the specific implementation mode of the application, is made skilled artisans appreciate that or realizing this Shen
Please.Various modifications to these embodiments will be apparent to one skilled in the art, as defined herein
General Principle can in other embodiments be realized in the case where not departing from spirit herein or range.Therefore, the application
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest range caused.
It should be understood that the application is not limited to the content for being described above and being shown in the accompanying drawings, and can
To carry out various modifications and change without departing from the scope.Scope of the present application is only limited by the accompanying claims.
Claims (6)
1. a kind of switching power unit of new energy access power distribution network, which is characterized in that including：First input end, the second input
End, output end, input rectifying filter circuit, EFD30 types transformer, output rectifier and filter and control circuit, wherein
The first input end is connect with the input rectifying filter circuit, the input rectifying filter circuit and the transformer
Primary coil connection, the secondary coil of the transformer connect with the output rectifier and filter, and the output rectification filter is electric
Road is connect with the output end；The control circuit is connected to the input rectifying filter circuit and output rectification filter electricity
Between road；
The control circuit includes IXBH5N160 types main power tube, SG3842AD1 types control chip and voltage feedback device；Institute
The one end for stating voltage feedback device is connect with the output rectifier and filter, and the other end is connect with the chip；The main work(
One end of rate pipe is connect with the input rectifying filter circuit, and the other end is connect with the chip；
Second input terminal is connect with the chip.
2. the switching power unit of new energy access power distribution network according to claim 1, which is characterized in that the voltage is anti-
It includes pc817 types photoelectrical coupler and light emitting diode to present device, and the photoelectrical coupler is connect with the chip, described to shine
Diode is connect with the output rectifier and filter.
3. the switching power unit of new energy access power distribution network according to claim 1 or 2, which is characterized in that the control
Circuit processed further includes zener diode, and the zener diode is connected to the output rectifier and filter and the Voltage Feedback
Between device.
4. the switching power unit of new energy access power distribution network according to claim 3, which is characterized in that the voltage stabilizing two
Pole pipe is TL431CLP type zener diodes.
5. the switching power unit of new energy access power distribution network according to claim 1, which is characterized in that further include primary
Filter circuit, the primary filter circuit are connected between the first input end and the input rectifying filter circuit.
6. the switching power unit of new energy access power distribution network according to claim 1, which is characterized in that the main power
The switching frequency of pipe any value between 25-30kHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820040254.XU CN207801764U (en) | 2018-01-10 | 2018-01-10 | A kind of switching power unit of new energy access power distribution network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820040254.XU CN207801764U (en) | 2018-01-10 | 2018-01-10 | A kind of switching power unit of new energy access power distribution network |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207801764U true CN207801764U (en) | 2018-08-31 |
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ID=63278444
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820040254.XU Active CN207801764U (en) | 2018-01-10 | 2018-01-10 | A kind of switching power unit of new energy access power distribution network |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207801764U (en) |
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2018
- 2018-01-10 CN CN201820040254.XU patent/CN207801764U/en active Active
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