CN207399031U - For the power circuit of the Unisolated switch power supply combination DC decompression of photovoltaic module - Google Patents
For the power circuit of the Unisolated switch power supply combination DC decompression of photovoltaic module Download PDFInfo
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Abstract
The utility model belongs to the power circuit of solar photovoltaic technology field more particularly to a kind of Unisolated switch power supply combination DC decompression for photovoltaic module.Including RLC parallel resonances bandwidth-limited circuit, Unisolated switch power circuit and 15V → ± 5V supply voltage translation circuits；RLC parallel resonances bandwidth-limited circuit is used to filter out the carrier signal in the termination power of photovoltaic module both ends, filtered voltage signal is converted to the pwm switching signal of 15V through Unisolated switch power supply chip, transformed pwm switching signal is filtered again, obtain 15V d. c. voltage signals, proportionality action through two three-terminal voltage-stabilizing power supply chips partial pressures, decompression and resistance R5 obtains ± 5V DC power supplies, it is further filtered finally by ± 5V power supplys output filter circuit, ripple is reduced to below 10mV.The circuit can provide ± 5V DC power supplies for photovoltaic module monitoring modular circuit and provide+3.3V DC power supplies for cpu chip, have many advantages, such as low in energy consumption, at low cost and high conversion efficiency.
Description
Technical field
The utility model belongs to solar photovoltaic technology field more particularly to a kind of non-isolated for photovoltaic module
The power circuit of Switching Power Supply combination DC decompression.
Background technology
With energetically support of the quickening and country of Energy restructuring paces to green energy resource, solar photovoltaic industry
It is developed rapidly.In photo-voltaic power generation station operational process, the monitoring modular mounted on photovoltaic module both ends is to solar power generation
The monitoring management stood plays a crucial role.Under normal conditions, to reduce the cost and complexity of circuit, monitoring modular is electric
The input terminal of source circuit directly takes electricity from photovoltaic module both ends, since photovoltaic module monitoring modular circuit needs the electricity using ± 5V
Source and cpu chip need the power supply using+3.3V, and photovoltaic module output voltage is 20-60V, far beyond power circuit
Range of needs, therefore the DC voltage at photovoltaic module both ends need to be depressured, photovoltaic group is given with the matched electric energy of the output phase
Part monitoring modular is powered.Usually DC voltage is carried out to be depressured optional isolation type switch power, such Switching Power Supply can be straight
It practices midwifery life ± 5V voltages, however this Switching Power Supply is expensive, and it is impracticable, therefore, there is an urgent need for a kind of at low cost and energy of design
Enough realize the power circuit of the photovoltaic module monitoring modular of DC voltage decompression.
Utility model content
Regarding to the issue above with defect, the utility model proposes a kind of Unisolated switch power supply for photovoltaic module with it is straight
The circuit that is combined of stream decompression, including be sequentially connected in series RLC parallel resonances bandwidth-limited circuit, Unisolated switch power circuit and
15V → ± 5V supply voltage translation circuits；
The RLC parallel resonances bandwidth-limited circuit includes the first RLC parallel resonances bandwidth-limited circuit, the 2nd RLC simultaneously
Join resonance bandwidth-limited circuit, 3rd resistor R3 and the 4th resistance R4；The first RLC parallel resonances bandwidth-limited circuit is by
One resistance R1, the first inductance L1 and the first capacitance C1 are in parallel to be formed, wherein, the first RLC parallel resonance bandwidth-limited circuits it is defeated
Enter end with the positive input terminal Vi+ of the power circuit at photovoltaic module both ends to be connected, the first RLC parallel resonance bandwidth-limited circuits it is defeated
Outlet is connected with 3rd resistor R3；The 2nd RLC parallel resonances bandwidth-limited circuit by second resistance R2, the second inductance L2 and
Second capacitance C2 is in parallel to be formed, wherein, the input terminal of the 2nd RLC parallel resonance bandwidth-limited circuits and the negative input of power circuit
End Vi- is connected, and the output terminal of the 2nd RLC parallel resonance bandwidth-limited circuits is connected with the 4th resistance R4；3rd resistor R3 and
Four resistance R4 are connected respectively with Unisolated switch power circuit, for by the first RLC parallel resonances bandwidth-limited circuit and second
RLC parallel resonances bandwidth-limited circuit is kept apart with Unisolated switch power circuit, to prevent Unisolated switch power circuit pair
The resonant frequency of first and second RLC parallel resonance bandwidth-limited circuits has an impact；
The Unisolated switch power circuit includes Unisolated switch power supply chip circuit and LC low-pass filtering power circuits；
The 15V → ± 5V supply voltages translation circuit includes direct-current voltage reducing circuit and ± 5V power supply output filter circuits,
Wherein, direct-current voltage reducing circuit includes the 5th resistance R5, the second diode D2, the 3rd diode D3, the 5th capacitance C5, the 6th capacitance
C6, the first three-terminal voltage-stabilizing power supply chip U2 and the second three-terminal voltage-stabilizing power supply chip U3；In the direct-current voltage reducing circuit, the 5th electricity
One end of resistance R5 is connected with the cathode of the second diode D2, and the other end is connected with the first three-terminal voltage-stabilizing power supply chip U2, and the three or two
The cathode of pole pipe D3 is connected with the anode of the second diode D2, the anode of the 3rd diode D3 and the second three-terminal voltage-stabilizing power supply chip
U3 connections, the 5th capacitance C5 are parallel to the both ends of the 5th resistance R5 and the second diode D2, and the 6th capacitance C6 is parallel to the three or two
The both ends of pole pipe D3；The first three-terminal voltage-stabilizing power supply chip U2 and the second three-terminal voltage-stabilizing power supply chip U3 respectively with ± 5V
Power supply output filter circuit is connected.
Unisolated switch power circuit is combined by the power circuit with 15V → ± 5V supply voltage translation circuits,
In, the d. c. voltage signal for the 20-60V that Unisolated switch power circuit can export photovoltaic module is converted into the direct current of 15V
Signal is pressed, the d. c. voltage signal of 15V can further be divided, is depressured by 15V → ± 5V supply voltages translation circuit, obtain ± 5V
DC power supply.
The circuit of the first RLC parallel resonances bandwidth-limited circuit and the 2nd RLC parallel resonance bandwidth-limited circuits is joined
Number sets identical, i.e. R1=R2=5.1K Ω, L1=L2=100uH, C1=C2=5.3nF, under these circuit parameters, by the
The centre frequency of one RLC parallel resonances bandwidth-limited circuit and the 2nd RLC parallel resonance bandwidth-limited circuits is arranged to f1=f2
=218.616KHz, quality factor are arranged to Q1=Q2=37.13, and pass band is arranged to BW1=BW2=5.888KHz, lead to
Frequency range is 215.672-221.56KHz, for filtering out the load for being connected in parallel on 218KHz in the termination power of photovoltaic module both ends
Ripple signal.
In the 15V → ± 5V supply voltage translation circuits, the 5th resistance R5 is for the first three-terminal voltage-stabilizing power supply of raising
The input voltage of chip U2 makes the first three-terminal voltage-stabilizing power supply chip U2 balanced with the second three-terminal voltage-stabilizing power supply chip U3 partial pressures, with
Guarantee ± 5V electric power output voltages are balanced.
The beneficial effects of the utility model are：
The utility model proposes a kind of for photovoltaic group in the case where meeting low in energy consumption, at low cost and high conversion efficiency
The power circuit of the Unisolated switch power supply combination DC decompression of part, the power circuit can be that photovoltaic module monitoring modular circuit carries
+ 3.3V DC power supplies are provided for ± 5V DC power supplies and for the cpu chip on photovoltaic module monitoring modular.The power circuit exists
Photovoltaic module monitoring modular consumes power no more than 1.5W when working normally, instantaneous power is no more than 2W, and less than photovoltaic group
The 1% of part peak power.In the case where realizing DC voltage decompression, voltage stabilizing, there is low in energy consumption, at low cost and high conversion efficiency
The advantages that.
Description of the drawings
Attached drawing 1 is a kind of power circuit schematic diagram of Unisolated switch power supply combination DC decompression for photovoltaic module；
Attached drawing 2 is a kind of optional RLC parallel resonances bandwidth-limited circuit schematic diagram；
Attached drawing 3 is a kind of optional Unisolated switch power circuit schematic diagram；
Attached drawing 4 is a kind of optional 15V → ± 5V supply voltage translation circuit schematic diagrames；
Specific embodiment
It elaborates with reference to the accompanying drawings and embodiments to the utility model.
The utility model proposes a kind of Unisolated switch power supply combination DC decompression for photovoltaic module power supply electricity
Unisolated switch power supply is combined by road, the power circuit with DC decompression mode, the 20-60V for first exporting photovoltaic module
D. c. voltage signal be converted into the d. c. voltage signal of 15V, then the d. c. voltage signal of 15V is converted into the direct current of ± 5V
Source, by being depressured, voltage stabilizing provides power supply for photovoltaic module monitoring modular circuit and its cpu chip, can be that photovoltaic module is supervised
Modular circuit offer ± 5V DC power supplies are provided and the cpu chip for photovoltaic module monitoring modular provides+3.3V DC power supplies.Such as
Power circuit schematic diagram shown in FIG. 1 based on Unisolated switch power supply combination DC decompression, the circuit are made of three parts, point
RLC parallel resonances bandwidth-limited circuit, Unisolated switch power circuit and the 15V that Wei be sequentially connected in series → ± 5V supply voltages become
Change circuit.The RLC parallel resonances bandwidth-limited circuit is connected in parallel on 218KHz in the termination power of photovoltaic module both ends for filtering out
Carrier signal, with obtain carrier-less signal interference photovoltaic module output voltage signal；The Unisolated switch power circuit
Voltage signal for the photovoltaic module of acquisition to be exported is converted to the d. c. voltage signal of 15V, the 15V → ± 5V power supplys electricity
Pressure translation circuit is used to the d. c. voltage signal of obtained 15V being reduced to the d. c. voltage signal of ± 5V.
Embodiment 1
Attached drawing 2 is a kind of optional RLC parallel resonances bandwidth-limited circuit schematic diagram, in a kind of optional scheme, RLC
Parallel resonance bandwidth-limited circuit includes：First RLC parallel resonances bandwidth-limited circuit, the 2nd RLC parallel resonance bandpass filterings
Circuit, 3rd resistor R3 and the 4th resistance R4.Wherein, the first RLC parallel resonances bandwidth-limited circuit is by first resistor R1, first
Inductance L1 and the first capacitance C1 is in parallel to be formed, and the 2nd RLC parallel resonances bandwidth-limited circuit is by second resistance R2, the second inductance L2
With the second capacitance C2 compositions in parallel.The input terminal of the first RLC parallel resonance bandwidth-limited circuits and photovoltaic module both ends
The positive input terminal Vi+ of power circuit is connected, and output terminal and the 3rd resistor R3 of the first RLC parallel resonance bandwidth-limited circuits go here and there
Connection；The negative input end of the input terminal of the 2nd RLC parallel resonance bandwidth-limited circuits and the power circuit at photovoltaic module both ends
Vi- is connected, and the output terminal of the 2nd RLC parallel resonance bandpass filtering power circuits is connected with the 4th resistance R4.The 3rd resistor
R3 and the 4th resistance R4 is by the first RLC parallel resonance bandpass filtering power circuits and the 2nd RLC parallel resonances bandpass filtering electricity
Source circuit is kept apart with the 3rd capacitance C3, prevents the 3rd capacitance C3 to first and second RLC parallel resonance bandpass filtering power circuits
Resonant frequency has an impact, wherein, R3=R4=27 Ω.In the present embodiment, RLC parallel resonances bandwidth-limited circuit can filter out
The carrier signal of 218KHz in the termination power of photovoltaic module both ends is connected in parallel on, prevents carrier signal from shunting and generating through power circuit
Signal is weak.Wherein, the circuit of the first RLC parallel resonances bandwidth-limited circuit and the 2nd RLC parallel resonance bandwidth-limited circuits
Parameter is R1=R2=5.1K Ω, L1=L2=100uH, C1=C2=5.3nF.Under these circuit parameters, the first RLC is in parallel
Centre frequency, quality factor and the pass band of resonance bandwidth-limited circuit and the 2nd RLC parallel resonance bandwidth-limited circuits are such as
It is lower described：
Centre frequency：
Quality factor：Q1=Q2=R1/2πf1L1=R2/2πf2L2=37.13
Pass band：BW1=BW2=f1/Q1=f2/Q2=5.888KHz
It follows that the first RLC parallel resonances bandwidth-limited circuit and the 2nd RLC parallel resonance bandwidth-limited circuits is logical
Frequency range is 215.672-221.56KHz.
Embodiment 2
Attached drawing 3 be a kind of optional Unisolated switch power circuit schematic diagram, in a kind of optional scheme, it is described it is non-every
Include from switching power circuit：Unisolated switch power supply chip circuit and LC low-pass filter circuits.The Unisolated switch power supply
Chip circuit includes the 3rd capacitance C3, Unisolated switch power supply chip, the first diode D1.
The first end of the 3rd capacitance C3 and the second end of 3rd resistor R3 and the input of Unisolated switch power supply chip
End 1 is connected, the second end of the 3rd capacitance C3 and the second end of the 4th resistance R4 and 3 phase of ground terminal of Unisolated switch power supply chip
Even.Wherein, the 3rd capacitance C3 can ensure the stable operation of Unisolated switch power supply chip, the Unisolated switch power supply chip
Model LM2575HVT-15, the photovoltaic module of the 20-60V obtained after can RLC parallel resonances bandwidth-limited circuit be filtered are defeated
The voltage signal gone out is converted to the pwm switching signal of 15V.
The Unisolated switch power supply chip includes：Input terminal 1, output terminal 2, ground terminal 3, feedback input end 4 and enabled
End 5, wherein, the input terminal 1 of Unisolated switch power supply chip LM2575HVT-15 and the second end of 3rd resistor R3 and the 3rd electricity
The first end for holding C3 is connected；The second end of 3 and the 4th resistance R4 of ground terminal of Unisolated switch power supply chip LM2575HVT-15
It is connected with the second end of the 3rd capacitance C3；4 and the 3rd electricity of feedback input end of Unisolated switch power supply chip LM2575HVT-15
Feel the second end of L3 and the first end of the 4th capacitance C4；The output terminal 2 of Unisolated switch power supply chip LM2575HVT-15 and
The first end of three inductance L3 is connected with the first end of the first diode D1；Unisolated switch power supply chip LM2575HVT-15's makes
Energy end 5 is connected with the second end of the 4th capacitance C4 and the second end of the first diode D1.Unisolated switch power supply chip is by first
The photovoltaic module output voltage signal that obtains is from Unisolated switch power supply core after the filtering of module RLC parallel resonances bandwidth-limited circuit
The input terminal 1 and ground terminal 3 of piece input, and are exported by the output terminal 2 and Enable Pin 5 of Unisolated switch power supply chip, through non-isolated
Switching power source chip Enable Pin 5 adjusts the duty cycle of pwm switching signal, obtains the pwm switching signal that frequency is 52KHz, output
The pwm switching signal of 15V filters to obtain d. c. voltage signal through LC low-pass filter circuits, obtained d. c. voltage signal access
The feedback input end 4 of Unisolated switch power supply chip, by with 1.23V normal voltages VREF inside Unisolated switch power supply chip
Compare, the d. c. voltage signal stabilization that Unisolated switch power supply chip is exported is in 15V.
The first diode D1 is fly-wheel diode, and effect is broken in the internal switch of Unisolated switch power supply chip
Conducting afterflow is carried out when opening, and is ended in internal switch conduction saturation.Wherein, the first end of the first diode D1 with it is non-isolated
The output terminal 2 of switching power source chip is connected with the first end of the 3rd inductance L3, and the second end of the first diode D1 is opened with non-isolated
The Enable Pin 5 of powered-down source chip is connected with the second end of the 4th capacitance C4.
The LC low-pass filter circuits include：3rd inductance L3 and the 4th capacitance C4, wherein, the first end of the 3rd inductance L3
With the first end of the first diode D1 in Unisolated switch power supply chip circuit and 2 phase of output terminal of Unisolated switch power supply chip
Even；The second end of 3rd inductance L3 is connected with 4 and the 4th capacitance C4 first ends of feedback input end of Unisolated switch power supply chip；
The first end of 4th capacitance C4 is connected with 4 and the 3rd inductance L3 second ends of feedback input end of Unisolated switch power supply chip；The
The second end of four capacitance C4 is connected with the second end of 5 and the 3rd diode D3 of Enable Pin of Unisolated switch power supply chip, wherein,
L3=330uH, C4=470uF.Ended by the upper limit of the 3rd inductance L3 and the 4th capacitance C4 the low-pass filtering power circuit formed
Frequency isThe pwm switching signal of Unisolated switch power supply chip circuit output can be filtered
Ripple further obtains the smaller direct current signal of ripple.
Embodiment 3
Attached drawing 4 is a kind of optional 15V → ± 5V supply voltage translation circuit schematic diagrames, in a kind of optional scheme,
The 15V → ± 5V supply voltage translation circuits include：Direct-current voltage reducing circuit and ± 5V power supply output filter circuits.The direct current
Reduction voltage circuit includes：5th resistance R5, the second diode D2, the 3rd diode D3, the 5th capacitance C5, the 6th capacitance C6, first
Three-terminal voltage-stabilizing power supply chip U2 and the second three-terminal voltage-stabilizing power supply chip U3.Wherein, the model of the first three-terminal voltage-stabilizing power supply chip U2
For LM7805, output voltage is+5V, the model LM7905 of the second three-terminal voltage-stabilizing power supply chip U3, output voltage for-
5V。
In the direct-current voltage reducing circuit, the first end of the 5th resistance R5, the first end of the 5th capacitance C5 and the one or three end
1 end of regulated power supply chip is connected；The second end of second diode D2, the second end of the 5th capacitance C5, the first three-terminal voltage-stabilizing electricity
2 ends of source chip, the first end of the 3rd diode D3, the first end of the 6th capacitance C6,2 ends of the second three-terminal voltage-stabilizing power supply chip
It is connected to the ground；The second end of 3rd diode D3, the second end of the 6th capacitance C6 and 1 end of the second three-terminal voltage-stabilizing power supply chip
It is connected；3 ends of the first three-terminal voltage-stabilizing power supply chip are connected with+5V the output terminals of DC power supply；Second three-terminal voltage-stabilizing power supply chip
3 ends be connected with -5V the output terminals of DC power supply.
The second diode D2 and the 3rd diode D3 is the zener diode of 7.5V, with the 5th capacitance C5, the 6th
Capacitance C6 collective effects ensure that the first three-terminal voltage-stabilizing power supply chip and the second three-terminal voltage-stabilizing power supply chip both end voltage are 7.5V,
Wherein, the 5th capacitance C5, the 6th capacitance C6 can further eliminate ripple caused by Unisolated switch power supply chip.
The first three-terminal voltage-stabilizing power supply chip and the second three-terminal voltage-stabilizing power supply chip after partial pressure respectively to obtaining 7.5V
DC voltage be depressured, finally obtain the d. c. voltage signal of ± 5V.
The effect of the 5th resistance R5 is the input voltage for improving the first three-terminal voltage-stabilizing power supply chip, avoids because of load
Resistance access causes first and second three-terminal voltage-stabilizing power supply chip unbalanced-voltage-division weighing apparatus problem, ensures ± 5V DC power supplies output electricity with this
Pressure is balanced.Wherein, the 5th resistance R5 first ends are connected with 1 end of the first three-terminal voltage-stabilizing power supply chip, the 5th resistance R5 second ends
It is connected with the first end of the second diode D2.
The circuit can provide the DC power supply of ± 5V for photovoltaic module monitoring modular circuit and be photovoltaic module monitoring mould
The DC power supply of cpu chip offer+3.3V in block.When power circuit provides for photovoltaic module monitoring modular circuit in the present embodiment
During the DC power supply of ± 5V, load resistance and -5V power output ends between+5V power output ends and ground terminal and ground terminal it
Between load resistance it is identical, at this time, the first three-terminal voltage-stabilizing power supply chip and the second three-terminal voltage-stabilizing power supply chip get 7.5V's
Voltage；And when power circuit provides+3.3V DC power supplies for the cpu chip in photovoltaic module monitoring modular, cpu chip needs simultaneously
It is associated between+5V output terminals and ground terminal, the load resistance of+5V power supplys is made to be less than the load resistance of -5V power supplys, is reacted to first
The input terminal of three-terminal voltage-stabilizing power supply chip and make its partial pressure obtain input voltage be less than the second three-terminal voltage-stabilizing power supply chip partial pressure
The input voltage of acquisition, so that the input voltage of the second three-terminal voltage-stabilizing power supply chip is more than the first three-terminal voltage-stabilizing power supply chip
Input voltage.Because the Serial regulation scope of the first three-terminal voltage-stabilizing power supply chip is more than 7.2V, therefore when the first three-terminal voltage-stabilizing electricity
When the load resistance of source chip is small to make its input voltage less than 7.2V, the first three-terminal voltage-stabilizing power supply chip cannot be in linearly interval
Input voltage is realized and is depressured, its output voltage is caused to be less than+5V, at this time the first three-terminal voltage-stabilizing power supply chip output voltage and the
The output voltage of two three-terminal voltage-stabilizing power supply chips is unbalanced.
± 5V power supply the output filter circuits include：7th capacitance C7, the 8th capacitance C8, the 9th capacitance C9, the tenth electricity
Hold C10.Wherein, the first end of the 7th capacitance C7, the first end of the 9th capacitance C9 with the first three-terminal voltage-stabilizing power supply chip U2 3
The end ,+5V output terminals of DC power supply circuit are connected；The second end of 7th capacitance C7, the second end of the 9th capacitance C9, the 8th capacitance
The first end of C8, the first end of the tenth capacitance C10 are connected to the ground；The second end of 8th capacitance C8, the second of the tenth capacitance C10
- 5V the output terminals with 3 ends of the second three-terminal voltage-stabilizing power supply chip U3, DC power supply circuit is held to be connected.The circuit can be further
The ripple of ± 5V DC power supplies is filtered out, makes it below 10mV.
Since+5V DC power supply circuits output current needed for photovoltaic module monitoring modular is less than 0.1A, -5V DC power supplies electricity
Road output current is less than 0.05A.When+5V DC power supply circuits output current is 0.1A, the work(of+5V DC power supply circuits at this time
Rate consumption is 0.5W, and the heat-dissipating power of the first three-terminal voltage-stabilizing power supply chip is 0.25W；When -5V DC power supply circuits export electricity
Flow for 0.05A when, at this time the power consumption of -5V DC power supply circuits be 0.25W, the heat dissipation of the second three-terminal voltage-stabilizing power supply chip
Power is 0.125W, therefore when photovoltaic module monitoring modular works normally, the power circuit consumption power in the present embodiment is most
The heat-dissipating power of greatly 0.75W, the first three-terminal voltage-stabilizing power supply chip and the second three-terminal voltage-stabilizing power supply chip amounts to and is no more than
0.375W, total power consumption amount to 1.125W.So that the utility model proposes power circuit and photovoltaic module monitoring mould
Block consumes power in normal work no more than 1.5W, and instantaneous power (power in 100ms) is no more than 2W, and not less than light
Lie prostrate the 1% of component peak power.
This embodiment is only the preferable specific embodiment of the utility model, but the scope of protection of the utility model not office
It is limited to this, in the technical scope that any one skilled in the art discloses in the utility model, can readily occurs in
Change or replacement should be covered within the scope of the utility model.The utility model spirit and scope are not being departed from
Under the premise of, the utility model also has further improvement, makes improvements still in claimed the scope of the utility model, because
This, the scope of protection of the utility model should be subject to the protection scope in claims.
Claims (4)
1. a kind of power circuit of Unisolated switch power supply combination DC decompression for photovoltaic module, which is characterized in that including
RLC parallel resonances bandwidth-limited circuit, Unisolated switch power circuit and the 15V being sequentially connected in series → ± 5V supply voltages conversion electricity
Road；
The RLC parallel resonances bandwidth-limited circuit is humorous including the first RLC parallel resonances bandwidth-limited circuit, the 2nd RLC parallel connections
Shake bandwidth-limited circuit, 3rd resistor R3 and the 4th resistance R4；The first RLC parallel resonances bandwidth-limited circuit is by the first electricity
R1, the first inductance L1 and the first capacitance C1 composition in parallel are hindered, wherein, the input terminal of the first RLC parallel resonance bandwidth-limited circuits
It is connected with the positive input terminal Vi+ of the power circuit at photovoltaic module both ends, the output terminal of the first RLC parallel resonance bandwidth-limited circuits
It connects with 3rd resistor R3；The 2nd RLC parallel resonances bandwidth-limited circuit is by second resistance R2, the second inductance L2 and second
Capacitance C2 is in parallel to be formed, wherein, the input terminal of the 2nd RLC parallel resonance bandwidth-limited circuits and the negative input end of power circuit
Vi- is connected, and the output terminal of the 2nd RLC parallel resonance bandwidth-limited circuits is connected with the 4th resistance R4；3rd resistor R3 and the 4th
Resistance R4 is connected respectively with Unisolated switch power circuit, for by the first RLC parallel resonances bandwidth-limited circuit and the 2nd RLC
Parallel resonance bandwidth-limited circuit is kept apart with Unisolated switch power circuit, to prevent Unisolated switch power circuit to
First, the resonant frequency of two RLC parallel resonance bandwidth-limited circuits has an impact；
The Unisolated switch power circuit includes Unisolated switch power supply chip circuit and LC low-pass filtering power circuits；
The 15V → ± 5V supply voltages translation circuit includes direct-current voltage reducing circuit and ± 5V power supply output filter circuits, wherein,
Direct-current voltage reducing circuit includes the 5th resistance R5, the second diode D2, the 3rd diode D3, the 5th capacitance C5, the 6th capacitance C6, the
One three-terminal voltage-stabilizing power supply chip U2 and the second three-terminal voltage-stabilizing power supply chip U3；In the direct-current voltage reducing circuit, the 5th resistance R5
One end be connected with the cathode of the second diode D2, the other end is connected with the first three-terminal voltage-stabilizing power supply chip U2, the 3rd diode
The cathode of D3 is connected with the anode of the second diode D2, and the anode of the 3rd diode D3 and the second three-terminal voltage-stabilizing power supply chip U3 connect
It connects, the 5th capacitance C5 is parallel to the both ends of the 5th resistance R5 and the second diode D2, and the 6th capacitance C6 is parallel to the 3rd diode
The both ends of D3；The first three-terminal voltage-stabilizing power supply chip U2 and the second three-terminal voltage-stabilizing power supply chip U3 respectively with ± 5V power supplys
Output filter circuit is connected.
2. a kind of power supply electricity of Unisolated switch power supply combination DC decompression for photovoltaic module according to claim 1
Road, which is characterized in that the power circuit mutually ties Unisolated switch power circuit and 15V → ± 5V supply voltages translation circuit
It closes, wherein, the d. c. voltage signal for the 20-60V that Unisolated switch power circuit can export photovoltaic module is converted into the straight of 15V
Voltage signal is flowed, the d. c. voltage signal of 15V can further be divided, be depressured, obtained by 15V → ± 5V supply voltages translation circuit
± 5V DC power supplies.
3. a kind of power supply electricity of Unisolated switch power supply combination DC decompression for photovoltaic module according to claim 1
Road, which is characterized in that the first RLC parallel resonances bandwidth-limited circuit and the 2nd RLC parallel resonance bandwidth-limited circuits
Circuit parameter sets identical, i.e. R1=R2=5.1K Ω, L1=L2=100uH, C1=C2=5.3nF, in these circuit parameters
Under, the centre frequency of the first RLC parallel resonances bandwidth-limited circuit and the 2nd RLC parallel resonance bandwidth-limited circuits is arranged to
F1=f2=218.616KHz, quality factor are arranged to Q1=Q2=37.13, and pass band is arranged to BW1=BW2=
5.888KHz, pass band are 215.672-221.56KHz, and photovoltaic module both ends termination power is connected in parallel on for filtering out
The carrier signal of 218KHz.
4. a kind of power supply electricity of Unisolated switch power supply combination DC decompression for photovoltaic module according to claim 1
Road, which is characterized in that in the 15V → ± 5V supply voltage translation circuits, the 5th resistance R5 is steady for improving the one or three end
The input voltage of piezoelectricity source chip U2 divides the first three-terminal voltage-stabilizing power supply chip U2 and the second three-terminal voltage-stabilizing power supply chip U3 equal
Weighing apparatus, it is balanced with guarantee ± 5V electric power output voltages.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721232699.XU CN207399031U (en) | 2017-09-25 | 2017-09-25 | For the power circuit of the Unisolated switch power supply combination DC decompression of photovoltaic module |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721232699.XU CN207399031U (en) | 2017-09-25 | 2017-09-25 | For the power circuit of the Unisolated switch power supply combination DC decompression of photovoltaic module |
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| CN207399031U true CN207399031U (en) | 2018-05-22 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111211680A (en) * | 2020-01-03 | 2020-05-29 | 中国船舶重工集团公司第七0七研究所 | Low-power consumption resonant gyro circuit power supply system |
| CN116505645A (en) * | 2023-06-21 | 2023-07-28 | 灿芯半导体(成都)有限公司 | Escape circuit for coping with built-in power failure |
-
2017
- 2017-09-25 CN CN201721232699.XU patent/CN207399031U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111211680A (en) * | 2020-01-03 | 2020-05-29 | 中国船舶重工集团公司第七0七研究所 | Low-power consumption resonant gyro circuit power supply system |
| CN111211680B (en) * | 2020-01-03 | 2023-04-28 | 中国船舶重工集团公司第七0七研究所 | Low-power consumption resonant gyro circuit power supply system |
| CN116505645A (en) * | 2023-06-21 | 2023-07-28 | 灿芯半导体(成都)有限公司 | Escape circuit for coping with built-in power failure |
| CN116505645B (en) * | 2023-06-21 | 2023-09-12 | 灿芯半导体(成都)有限公司 | Escape circuit for coping with built-in power failure |
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Granted publication date: 20180522 Termination date: 20210925 |