CN207399038U - Double primary side isolated power supplies - Google Patents
Double primary side isolated power supplies Download PDFInfo
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- CN207399038U CN207399038U CN201721510191.1U CN201721510191U CN207399038U CN 207399038 U CN207399038 U CN 207399038U CN 201721510191 U CN201721510191 U CN 201721510191U CN 207399038 U CN207399038 U CN 207399038U
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- 238000004804 winding Methods 0.000 claims abstract description 38
- 230000005611 electricity Effects 0.000 claims description 10
- 238000004146 energy storage Methods 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 claims 1
- 238000005516 engineering process Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
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Abstract
The utility model discloses a kind of double primary side isolated power supplies,Including MOS switch pipe Q1,The grid G of the MOS switch pipe Q1 is connected with the PWM1 input terminals of control module,The PWM2 input terminals of control module are connected with the grid G of MOS switch pipe Q2,The PWM IN input terminals of control module are connected with the EXT output terminals of PWM generator,The CTR ends of the PWM generator and the CTR ends of control module connect,Voltage V1 ends and voltage V2 ends are connected in control module,The FB output terminals of PWM generator are connected to one end of resistance R1 and one end of resistance R2,The other end of resistance R1 is connected to the anode of diode D3 and one end of capacitance C1,The cathode of diode D3 is connected to one end of the feedback winding L4 of transformer T1 and one end of resistance R3.The utility model is by increasing primary side winding newly to transformer, solving the problems, such as multi input power supply or adapting to the control source of wider range, and cost is constant.
Description
Technical field
The utility model is related to switch power technology field more particularly to a kind of double primary side isolated power supplies.
Background technology
Isolated power supply is that 220V voltages are dropped to voltage relatively low voltage by transformer using transformer, then whole again
It flows into the power supply of direct current electricity output to use, because the main coil of transformer bears 220V voltages, secondary coil is solely subjected to the low of output
Alternating voltage, and be not directly coupled between primary and secondary coil, so referred to as isolated power supply, existing isolated power supply is all single electricity
Source inputs, and accommodation is smaller, so we have proposed double primary side isolated power supplies to solve the problem above-mentioned.
Utility model content
Technical problems based on background technology, the utility model proposes double primary side isolated power supplies.
The utility model proposes double primary side isolated power supplies, including MOS switch pipe Q1, the grid G of the MOS switch pipe Q1
The PWM1 input terminals of control module are connected with, the PWM2 input terminals of control module are connected with the grid G of MOS switch pipe Q2, control
The PWM IN input terminals of module are connected with the EXT output terminals of PWM generator, the CTR ends of the PWM generator and control module
CTR ends connect, and are connected to voltage V1 ends and voltage V2 ends in control module, the FB output terminals of PWM generator connect respectively
There are one end of resistance R1 and one end of resistance R2, the other end of resistance R1 is connected to the anode of diode D3 and capacitance C1
One end, the cathode of diode D3 are connected to one end of the feedback winding L4 of transformer T1 and one end of resistance R3, resistance R3
The other end be connected to one end of resistance R3 and the FB output terminals of control module, the drain D connection of the MOS switch pipe Q1
Have one end of the L1 windings of transformer T1, the other ends of the L1 windings of transformer T1 is connected with voltage V1, the L3 of transformer T1 around
One end of group is connected with the cathode of diode D4, and the anode of diode D4 is connected to one end of Vout and capacitance C2, and MOS is opened
The drain D of pass pipe Q2 is connected with one end of the L2 windings of transformer T1, and the other end of the L2 windings of transformer T1 is connected with voltage
V2。
Preferably, transformer has two primary sides to input L1 and L2.
Preferably, control module is different according to input and output, and control L1, L2 working condition are different, and different windings are directed to
Different input voltage or for different voltage ranges, PWM generation circuits generate pwm signal ripple according to output voltage
Shape, voltage V1, V2 of input are connected to control module, and the pwm signal of the generation of PWM generator is also coupled to the PWM of control module
Input terminal, transformer T1 feedback winding L4 output through resistance R3 and resistance R4 partial pressure after be input to control module feedback end it is defeated
Enter end, control module synchronizes the pwm signal of input, and judges that input voltage amplitude size cases and L4 are fed back to
The signal come, controls the working condition of Q1, Q2 switching tube, and passes through the working condition of CTR output adjustment PWM oscillators, high electricity
When pressing V1 inputs, Q1, L1 work, during the low input V2 of voltage, Q2, L2 work, when voltage V1 overtensions, and secondary output work
When rate demand is very low, Q1 work a cycles, in space closure several cycles, during Q1 work conductings, Q2 is turned on, at this time L1, L2
An ortho-exciting electric source is formed, V2 absorbs part energy storage, in the cycle closed in follow-up Q1, worked by Q2 to secondary
Carry out conveying energy；When voltage V1 brownouts or secondary output power is excessively high, and Q1 conductings, Q2 is also switched on, and is worked together；
When V1 is relatively low, when V2 is higher, Q1, Q2 maintain to work alternatively.
Preferably, the source S of the MOS switch pipe Q1 is connected with the cathode of diode D1, and the anode of diode D1 with
The drain D of MOS switch pipe Q2 is connected.
Preferably, primary side L1, L2 accesses different inputs, is electrically isolated between each input.
Preferably, voltage V1, V2 and connect.
Preferably, the voltage V1 and voltage V2 is connected to corresponding different voltage.
Preferably, the PWM generator is by a structure in oscillator comparator, DC-DC chips, switching power source chip
Into control module is made of one in comparator, high-speed AD, CPLD, DSP.
The beneficial effects of the utility model are：PWM generator generation circuit generates pwm signal waveform according to output voltage,
Voltage V1, V2 of input are connected to control module, and the pwm signal of the generation of PWM generator is also coupled to the PWM inputs of control module
End, the feedback winding L4 outputs of transformer T1 are input to the feedback end input terminal of control module, control module after R3, R4 partial pressure
The pwm signal of input is synchronized, and judges input voltage amplitude size cases and the signal that L4 is fed back, is controlled
The working condition of Q1, Q2 switching tube, and pass through the working condition of CTR output adjustment PWM generators, the utility model passes through to becoming
Depressor T1 increases primary side winding newly, solves the problems, such as multi input power supply or adapts to the control source of wider range, in broader work
The higher efficiency of scope.
Description of the drawings
Fig. 1 be the utility model proposes double primary side isolated power supplies circuit diagram.
Specific embodiment
The utility model is made with reference to specific embodiment further to explain.
Embodiment
With reference to figure 1, double primary side isolated power supplies are proposed in the present embodiment, including MOS switch pipe Q1, MOS switch pipe Q1's
Grid G is connected with the PWM1 input terminals of control module, and the PWM2 input terminals of control module are connected with the grid G of MOS switch pipe Q2,
The PWM IN input terminals of control module are connected with the EXT output terminals of PWM generator, the CTR ends of PWM generator and control module
CTR ends connect, and are connected to voltage V1 ends and voltage V2 ends in control module, the FB output terminals of PWM generator connect respectively
There are one end of resistance R1 and one end of resistance R2, the other end of resistance R1 is connected to the anode of diode D3 and capacitance C1
One end, the cathode of diode D3 are connected to one end of the feedback winding L4 of transformer T1 and one end of resistance R3, resistance R3
The other end be connected to one end of resistance R3 and the FB output terminals of control module, the drain D of MOS switch pipe Q1 is connected with change
One end of the L1 windings of depressor T1, the other end of the L1 windings of transformer T1 are connected with voltage V1, the L3 windings of transformer T1
One end is connected with the cathode of diode D4, and the anode of diode D4 is connected to one end of Vout and capacitance C2, MOS switch pipe
The drain D of Q2 is connected with one end of the L2 windings of transformer T1, and the other end of the L2 windings of transformer T1 is connected with voltage V2,
PWM generation circuits generate pwm signal waveform according to output voltage, and the voltage V1, V2 of input are connected to control module, PWM generator
The pwm signal of generation be also coupled to the PWM input terminals of control module, the feedback winding L4 outputs of transformer T1 are through R3, R4 points
The feedback end input terminal of control module is input to after pressure, control module synchronizes the pwm signal of input, and judges input electricity
The signal that pressure amplitude degree size cases and L4 are fed back controls Q1, the working condition of Q2 switching tubes, and is exported and adjusted by CTR
The working condition of whole PWM generator, the utility model by increasing primary side winding newly to transformer T1, solve multi input power supply or
The control source problem of wider range is adapted to, in the higher efficiency of broader working range.
In the present embodiment, transformer has two primary sides to input L1 and L2, and control module is different according to input and output, control L1,
L2 working conditions are different, and for different windings for different input voltages or for different voltage ranges, PWM generates electricity
Road generates pwm signal waveform according to output voltage, and voltage V1, V2 of input are connected to control module, the generation of PWM generator
Pwm signal is also coupled to the PWM input terminals of control module, and the feedback winding L4 outputs of transformer T1 are through R4 points of resistance R3 and resistance
The feedback end input terminal of control module is input to after pressure, control module synchronizes the pwm signal of input, and judges input electricity
The signal that pressure amplitude degree size cases and L4 are fed back controls the working condition of Q1, Q2 switching tube, and is exported and adjusted by CTR
The working condition of whole PWM oscillators, when high voltage V1 is inputted, Q1, L1 work are operated in efficiency highest state, the low input of voltage
During V2, Q2, L2 work are operated in efficiency highest state, when voltage V1 overtensions, and secondary output power demand is very low
When, Q1 work a cycles, in space closure several cycles, during Q1 work conductings, Q2 conductings, L1, L2 are forming one just at this time
Swash power supply, V2 absorbs part energy storage, in the cycle closed in follow-up Q1, worked by Q2 and carry out conveying energy to secondary
Amount, such Q1, Q2 maintain higher efficiency；When voltage V1 brownouts or secondary output power is excessively high, Q1 conductings, Q2
It is also switched on, works together, improve efficiency and power；When V1 is relatively low, when V2 is higher, Q1, Q2 maintain to work alternatively, to keep highest
Efficiency, the source S of MOS switch pipe Q1 is connected with the cathode of diode D1, and the anode of diode D1 is with MOS switch pipe Q2's
Drain D is connected, and primary side L1, L2 accesses different inputs, is electrically isolated between each input, does not meet various spies altogether
Different system, voltage V1, V2 simultaneously connect, and for expanding input voltage range, voltage V1 and voltage V2 are connected to corresponding difference
Voltage, PWM generator is made of one in oscillator comparator, DC-DC chips, switching power source chip, control module by
A composition in comparator, high-speed AD, CPLD, DSP, PWM generator generation circuit generate pwm signal according to output voltage
Waveform, voltage V1, V2 of input are connected to control module, and the pwm signal of the generation of PWM generator is also coupled to control module
PWM input terminals, the feedback winding L4 outputs of transformer T1 are input to the feedback end input terminal of control module after R3, R4 partial pressure,
Control module synchronizes the pwm signal of input, and judges input voltage amplitude size cases and the letter that L4 is fed back
Number, the working condition of Q1, Q2 switching tube is controlled, and passes through the working condition of CTR output adjustment PWM generators, the utility model
By increasing primary side winding newly to transformer T1, solving the problems, such as multi input power supply or adapting to the control source of wider range, more
The higher efficiency of wide working range.
In the present embodiment, in transformer T1 is exported, a primary side winding L2 is added for input power V2, in actual use
Primary side winding number is determined according to the power supply number or voltage range of input, different windings for different input voltage or
For different voltage ranges, PWM generation circuits generate pwm signal waveform according to output voltage, and voltage V1, V2 of input connect
To control module, the pwm signal of the generation of PWM generator is also coupled to the PWM input terminals of control module, the feedback of transformer T1
Winding L4 outputs are input to the feedback end input terminal of control module after R3, R4 partial pressure, control module to the pwm signal of input into
Row is synchronous, and judges input voltage amplitude size cases and the signal that L4 is fed back, and controls the work of Q1, Q2 switching tube
Situation, and pass through the working condition of CTR output adjustment PWM oscillators, when high voltage V1 is inputted, Q1, L1 work are operated in efficiency
Highest state, as the low input V2 of voltage, Q2, L2 work are operated in efficiency highest state, when voltage V1 overtensions, and
And secondary output power demand it is very low when, Q1 work a cycle, space closure several cycles, Q1 work conducting during, Q2 is led
Logical, L1, L2 form an ortho-exciting electric source at this time, and V2 absorbs part energy storage, in the cycle closed in follow-up Q1, by Q2 into
Row work carries out secondary conveying energy, and such Q1, Q2 maintain higher efficiency；When voltage V1 brownouts or secondary
Output power is too high, and Q1 conductings, Q2 is also switched on, and is worked together, and improves efficiency and power；When V1 is relatively low, when V2 is higher, Q1,
Q2 maintains to work alternatively, to keep highest efficiency, after feedback winding L4 output diode D1 rectifications C1 filtering, through R1, R2 points
Press defeated to PWM generator circuit, PWM generation circuits adjust the pulsewidth of PWM according to the voltage signal of feedback, the L3 of transformer T1 around
Group is output main winding, and Vout is exported after diode D4 rectifications C2 filtering, because L4, L3 are the winding of transformer, the electricity of L4
The output-response output of L3 is pressed, so being stablized to improve output as feedback signal by the output of L4, also adding light from Vout
Coupling feeds back to PWM feedback end, when for expand circuit input voltage work enclose when, when only there are one control source when, also electricity
Same control source is directly arrived at V1, V2 end on road.
The above is only the preferable specific embodiment of the utility model, but the scope of protection of the utility model is not
This is confined to, in the technical scope that any one skilled in the art discloses in the utility model, according to this practicality
New technical solution and its utility model design are subject to equivalent substitution or change, should all cover the protection model in the utility model
Within enclosing.
Claims (7)
1. pair primary side isolated power supply, including MOS switch pipe Q1, which is characterized in that the grid G of the MOS switch pipe Q1 is connected with
The PWM1 input terminals of control module, the PWM2 input terminals of control module are connected with the grid G of MOS switch pipe Q2, control module
PWMIN input terminals are connected with the EXT output terminals of PWM generator, and the CTR ends of the PWM generator and the CTR ends of control module connect
It connects, voltage V1 ends and voltage V2 ends is connected in control module, the FB output terminals of PWM generator are connected to resistance R1
One end and resistance R2 one end, the other end of resistance R1 is connected to the anode of diode D3 and one end of capacitance C1, two
The cathode of pole pipe D3 is connected to one end of the feedback winding L4 of transformer T1 and one end of resistance R3, the other end of resistance R3
One end of resistance R3 and the FB output terminals of control module are connected to, the drain D of the MOS switch pipe Q1 is connected with transformer
One end of the L1 windings of T1, the other end of the L1 windings of transformer T1 are connected with voltage V1, one end of the L3 windings of transformer T1
The cathode of diode D4 is connected with, the anode of diode D4 is connected to one end of Vout and capacitance C2, MOS switch pipe Q2's
Drain D is connected with one end of the L2 windings of transformer T1, and the other end of the L2 windings of transformer T1 is connected with voltage V2.
2. double primary side isolated power supplies according to claim 1, which is characterized in that transformer has two primary sides to input L1 and L2.
3. double primary side isolated power supplies according to claim 1, which is characterized in that control module is different according to input and output,
Control L1, L2 working condition different, different windings is for different input voltages or for different voltage ranges, PWM
Generation circuit generates pwm signal waveform according to output voltage, and voltage V1, V2 of input are connected to control module, PWM generator
The pwm signal of generation is also coupled to the PWM input terminals of control module, and the feedback winding L4 of transformer T1 is exported through resistance R3 and electricity
The feedback end input terminal of control module is input to after resistance R4 partial pressures, control module synchronizes the pwm signal of input, and judges
The signal that input voltage amplitude size cases and L4 are fed back, controls the working condition of Q1, Q2 switching tube, and passes through CTR
The working condition of output adjustment PWM oscillators, high voltage V1 input when, Q1, L1 work, voltage it is low input V2 when, Q2, L2 work
Make, when voltage V1 overtensions, and when secondary output power demand is very low, Q1 work a cycles, space closure several weeks
Phase, during Q1 work conductings, Q2 conductings, L1, L2 form an ortho-exciting electric source, V2 absorption part energy storages, rear at this time
In the cycle that continuous Q1 is closed, worked by Q2 and conveying energy is carried out to secondary；It is when voltage V1 brownouts or secondary defeated
It is excessively high to go out power, Q1 conductings, Q2 is also switched on, and is worked together；When V1 is relatively low, when V2 is higher, Q1, Q2 maintain to work alternatively.
4. double primary side isolated power supplies according to claim 1, which is characterized in that the source S connection of the MOS switch pipe Q1
There is the cathode of diode D1, and the anode of diode D1 is connected with the drain D of MOS switch pipe Q2.
5. double primary side isolated power supplies according to claim 2, which is characterized in that primary side L1, L2 accesses different inputs, electricity
Isolated between respectively being inputted on gas.
6. double primary side isolated power supplies according to claim 1, which is characterized in that voltage V1, V2 simultaneously connect.
7. double primary side isolated power supplies according to claim 1, which is characterized in that the PWM generator is compared by oscillator
A composition in device, DC-DC chips, switching power source chip, control module is by one in comparator, high-speed AD, CPLD, DSP
A composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721510191.1U CN207399038U (en) | 2017-11-14 | 2017-11-14 | Double primary side isolated power supplies |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721510191.1U CN207399038U (en) | 2017-11-14 | 2017-11-14 | Double primary side isolated power supplies |
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| Publication Number | Publication Date |
|---|---|
| CN207399038U true CN207399038U (en) | 2018-05-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721510191.1U Withdrawn - After Issue CN207399038U (en) | 2017-11-14 | 2017-11-14 | Double primary side isolated power supplies |
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| CN (1) | CN207399038U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107733241A (en) * | 2017-11-14 | 2018-02-23 | 深圳睿舍智能科技有限公司 | Double primary side insulating power supplies |
-
2017
- 2017-11-14 CN CN201721510191.1U patent/CN207399038U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107733241A (en) * | 2017-11-14 | 2018-02-23 | 深圳睿舍智能科技有限公司 | Double primary side insulating power supplies |
| CN107733241B (en) * | 2017-11-14 | 2024-01-26 | 深圳睿舍智能科技有限公司 | Dual primary side isolated power supply |
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Granted publication date: 20180522 Effective date of abandoning: 20240126 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20180522 Effective date of abandoning: 20240126 |
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| AV01 | Patent right actively abandoned |