CN209046532U - A kind of list pulse width modulator Multiple isolated outputs circuit - Google Patents
A kind of list pulse width modulator Multiple isolated outputs circuit Download PDFInfo
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- CN209046532U CN209046532U CN201822104215.4U CN201822104215U CN209046532U CN 209046532 U CN209046532 U CN 209046532U CN 201822104215 U CN201822104215 U CN 201822104215U CN 209046532 U CN209046532 U CN 209046532U
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Abstract
The utility model relates to a kind of single pulse width modulator Multiple isolated outputs circuits, including multiwinding transformer, multiple output rectifier and filters and multiple dynamic load compensation circuits, the multiwinding transformer includes multiple secondary windings, the input terminal of the output rectifier and filter is connect with each secondary windings of multiwinding transformer respectively, the output end of each output rectifier and filter is connected a dynamic load compensation circuit, the output end of the dynamic load compensation circuit and load connect, the input terminal of the multiwinding transformer is connected through the output end of power switch tube and input filter circuit, the control terminal of the power switch tube connects to the control circuit.The utility model realizes the independent output of plurality of voltages isolation, while can carry out effective compensation to each road output voltage imbalance.Have the characteristics that few, small in size, each road of wide input voltage range, device is mutually isolated and high conversion efficiency, can be widely applied to field of switch power.
Description
Technical field
The utility model relates to a kind of spacing output circuits, and in particular to a kind of list pulse width modulator Multiple isolated outputs electricity
Road.
Background technique
Switching Power Supply is widely used in the electronic systems such as space flight, aviation, weapons, industry, as equipment power distribution is high
Reliably, efficient, light-weighted development trend, multipath insulation output power supply are used widely.Traditional multichannel isolation is independent defeated
Switching Power Supply is frequently with more pulse width modulators (PWM) control circuit out, and circuit is complicated, device is more, and volume is big.
Utility model content
The purpose of this utility model is to provide a kind of single pulse width modulator Multiple isolated outputs circuits, realize plurality of voltages
The independent output of isolation, while effective compensation can be carried out to each road output voltage imbalance.
To achieve the above object, the utility model uses following technical scheme:
A kind of list pulse width modulator Multiple isolated outputs circuit, including multiwinding transformer, multiple output rectification filters electricity
Road and multiple dynamic load compensation circuits, the multiwinding transformer include multiple secondary windings, the output rectification filter electricity
The input terminal on road is connect with each secondary windings of multiwinding transformer respectively, and the output end of the current rectifying and wave filtering circuit is compensated
Element circuit and load connect, output end of the input terminal of the multiwinding transformer through power switch tube and input filter circuit
Connection, the control terminal of the power switch tube connect to the control circuit.
As a further improvement of the above technical scheme:
Each output rectifier and filter is made of diode and capacitor, the secondary windings of the multiwinding transformer
One end of the connection of the anode of one end and diode, the cathode of the diode and capacitor connects, the other end of the capacitor and more
The secondary windings other end of winding transformer connects.
The compensating unit circuit includes dynamic load compensation circuit, and the dynamic load compensation circuit is by resistance and pressure stabilizing
Pipe composition, one end of the resistance and the output end of output rectifier and filter connect, the other end and voltage-stabiliser tube of the resistance
Cathode connection, the plus earth of voltage-stabiliser tube.
The compensating unit circuit includes overload compensation circuit, and the compensating unit circuit includes overload compensation electricity
Road, the compensating unit circuit include overload compensation circuit, and the overload compensation circuit uses resistance R1, the resistance R1
One end and the wherein output end of output rectifier and filter all the way, other end ground connection.
The power switch tube uses metal-oxide-semiconductor, the different name of the primary coil of the drain and multiwinding transformer of the metal-oxide-semiconductor
End connection, the source electrode ground connection of metal-oxide-semiconductor, the grid of metal-oxide-semiconductor connect to the control circuit.
The secondary windings of the transformer is formed by inner hereby line coiling, it is described in hereby line by multiple groups secondary wire uniformly be twisted and
At.
As shown from the above technical solution, single pulse width modulator Multiple isolated outputs circuit described in the utility model, passes through
The features such as independent output of single pulse width modulator (PWM) control multichannel isolation, circuit is simple, high conversion efficiency less using device.
It is very suitable to the mutually isolated multiple power supplies occasion of wide input voltage range, small size, output voltage.
Detailed description of the invention
Fig. 1 is the circuit block diagram of the utility model；
Fig. 2 is the circuit diagram of the utility model；
Fig. 3 is the hereby schematic diagram of line in the utility model；
Fig. 4 is the circuit diagram of the utility model concrete application.
Specific embodiment
The utility model is described further with reference to the accompanying drawing:
As shown in Figure 1, single pulse width modulator Multiple isolated outputs circuit of the present embodiment, including multiwinding transformer 11,
Multiple output rectifier and filters 8 and multiple dynamic load compensation circuits 9, multiwinding transformer 11 include multiple secondary windings,
Output rectifier and filter 8 includes the first output rectifier and filter 12, the second output rectifier and filter 13 ... and the n-th tunnel
Output rectifier and filter 14, dynamic load compensation circuit 9 include overload compensation circuit 15, the first dynamic load compensation electricity
Road 16 ... and the n-th road dynamic load compensation circuit 17；First output rectifier and filter 12, the second output rectifier and filter
13 ... and n-th road output rectifier and filter 14 output end respectively with overload compensation circuit 15, the first dynamic load compensate
Circuit 16 ... and the connection of the n-th road dynamic load compensation circuit 17, overload compensation circuit 15, the first dynamic load compensation circuit
16 ... and n-th road dynamic load compensation circuit 17 output end respectively with load connect, the first output rectifier and filter 12,
The input terminal of second output rectifier and filter 13 ... and the n-th road output rectifier and filter 14 respectively with multiwinding transformer
11 secondary windings connection, output end of the input terminal of multiwinding transformer 11 through power switch tube 10 Yu input filter circuit 1
Connection, the control terminal of power switch tube 10 are connect with control circuit 4.
Input direct-current voltage, when being connected by power switch 10, by 11 storage energy of multiwinding transformer, power switch 10
When disconnection, energy isolation is transferred to secondary by multiwinding transformer 11, then passes through output rectifier and filter 12, output rectification
Filter circuit 13, output rectifier and filter 14 convert thereof into smooth DC output voltage, finally by load compensation 15,
Dynamic load compensation 16, dynamic load compensation 17, to each road output voltage carry out imbalance compensation, thus realize plurality of voltages every
From output.
As shown in Fig. 2, dynamic load compensation circuit 9 is made of resistance R and voltage-stabiliser tube Z, one end of resistance R and output are rectified
The output end of filter circuit 8 connects, and the other end of resistance R and the cathode of voltage-stabiliser tube connect, the plus earth of voltage-stabiliser tube Z.Load
Compensation circuit 15 uses resistance R1, and the one end resistance R1 is connected to the output end of the first output rectifier and filter 12, resistance R1's
Other end ground connection.When voltage after output rectification filter is greater than design value, voltage-stabiliser tube Z conducting, output voltage reduces, and works as output
When voltage after rectifying and wave-filtering is less than design value, voltage-stabiliser tube Z cut-off, output voltage increases, and it is defeated to adjust compensation using dynamic load R
Voltage out makes output voltage keep design value.Can be had to the Voltage unbalance of output using dynamic load compensation technique
Effect compensation, further improves the output voltage precision on each road.Power switch tube uses metal-oxide-semiconductor 10, the drain of metal-oxide-semiconductor 10 and more
The different name end of the primary coil of winding transformer 11 connects, the source electrode ground connection of metal-oxide-semiconductor V, the grid and control circuit 4 of metal-oxide-semiconductor 10
Connection.Power switch tube uses metal-oxide-semiconductor 10 by the DC voltage conversion of input for power pulse, then through multiwinding transformer 11
It is isolated, is coupled to secondary.
As shown in figure 3, the system of having mercy on will lead to circle number line multiple groups coil in parallel since magnetic core of transformer is usually cylindric
Long, line resistance difference, since the current direction in every strand is identical, the magnetic field of generation is overlapped mutually, and interference is larger, is directly affected
The precision of output voltage.The secondary windings of the transformer of the present embodiment is formed by inner hereby line coiling, and inner hereby line is by multiple groups secondary wire
Uniformly it is twisted.On the one hand the difference that secondary multiple groups line line resistance can be reduced, on the other hand passes through coupled room between line line
Magnetic direction ceaselessly converts, and the flow direction of formation is on the contrary, the elimination that can cancel out each other is interfered, to reduce multiple-channel output electricity
The imbalance of pressure.
Typical case block diagram of the circuit that single pulse width modulator (PWM) control multichannel isolation independently exports in Switching Power Supply
As shown in figure 4, Switching Power Supply main circuit is by input filter circuit 1, circuit for power conversion 7, output rectifier and filter 8, dynamic
Load compensation 9, accessory power supply 3, control circuit 4, isolation circuit 5, feedback control circuit 6 form.The DC voltage of input is through defeated
Enter filter circuit 1, provides the operating voltage of control circuit 4 by accessory power supply 3, control circuit 4 is power in circuit for power conversion 7
Switching tube provides driving signal, and power switch tube is converted into power pulse, and power pulse is after transformer isolation, by exporting
Current rectifying and wave filtering circuit 8 converts thereof into smooth DC output voltage；Wherein output voltage all the way is through 6 He of feedback control circuit
Isolation circuit 5 transmits control signals to control circuit 4, by the power arteries and veins of the control circuit 4 control power conversion circuit output
Width is rushed, to realize the closed-loop control of output voltage, electricity is realized using transformer Multiple coil voltage follow mode in remaining each road
Pressure output, while to improve output voltage precision, 9 modes are compensated using dynamic load, output voltage imbalance is compensated.
Embodiment described above is only that preferred embodiments of the present invention are described, not practical to this
Novel range is defined, and under the premise of not departing from the spirit of the design of the utility model, those of ordinary skill in the art are to this
The various changes and improvements that the technical solution of utility model is made should all fall into the protection that the utility model claims book determines
In range.
Claims (6)
1. a kind of list pulse width modulator Multiple isolated outputs circuit, it is characterised in that: whole including multiwinding transformer, multiple outputs
It flows filter circuit and multiple dynamic load compensation circuits, the multiwinding transformer includes multiple secondary windings, the output is whole
The input terminal of stream filter circuit is connect with each secondary windings of multiwinding transformer respectively, the output of the current rectifying and wave filtering circuit
Compensated element circuit and load is held to connect, the input terminal of the multiwinding transformer is through power switch tube and input filter circuit
Output end connection, the control terminal of the power switch tube connects to the control circuit.
2. list pulse width modulator Multiple isolated outputs circuit according to claim 1, it is characterised in that: each output rectification
Filter circuit is made of diode and capacitor, and one end of the secondary windings of the multiwinding transformer and the anode of diode connect
It connects, the cathode of the diode and one end of capacitor connect, the other end of the capacitor and the secondary windings of multiwinding transformer
Other end connection.
3. list pulse width modulator Multiple isolated outputs circuit according to claim 1, it is characterised in that: the compensating unit
Circuit includes dynamic load compensation circuit, and the dynamic load compensation circuit is by resistance and regulator tube group at the one of the resistance
End is connect with the output end of output rectifier and filter, and the other end of the resistance and the cathode of voltage-stabiliser tube connect, voltage-stabiliser tube
Plus earth.
4. list pulse width modulator Multiple isolated outputs circuit according to claim 1, it is characterised in that: the compensating unit
Circuit includes overload compensation circuit, and the overload compensation circuit uses resistance R1, the one end the resistance R1 with wherein all the way
The output end of output rectifier and filter, other end ground connection.
5. list pulse width modulator Multiple isolated outputs circuit according to claim 1, it is characterised in that: the power switch
Pipe uses metal-oxide-semiconductor, and the different name end of the primary coil of the drain and multiwinding transformer of the metal-oxide-semiconductor connects, and the source electrode of metal-oxide-semiconductor connects
The grid on ground, metal-oxide-semiconductor connects to the control circuit.
6. list pulse width modulator Multiple isolated outputs circuit according to claim 1, it is characterised in that: the transformer
Secondary windings is formed by inner hereby line coiling, it is described in hereby line be uniformly twisted by multiple groups secondary wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822104215.4U CN209046532U (en) | 2018-12-14 | 2018-12-14 | A kind of list pulse width modulator Multiple isolated outputs circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822104215.4U CN209046532U (en) | 2018-12-14 | 2018-12-14 | A kind of list pulse width modulator Multiple isolated outputs circuit |
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| Publication Number | Publication Date |
|---|---|
| CN209046532U true CN209046532U (en) | 2019-06-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201822104215.4U Active CN209046532U (en) | 2018-12-14 | 2018-12-14 | A kind of list pulse width modulator Multiple isolated outputs circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109412423A (en) * | 2018-12-14 | 2019-03-01 | 中国电子科技集团公司第四十三研究所 | It is a kind of list pulse width modulator Multiple isolated outputs circuit and isolation output method |
| CN112825454A (en) * | 2019-11-21 | 2021-05-21 | 复旦大学 | DCDC multichannel isolation output circuit for flywheel |
-
2018
- 2018-12-14 CN CN201822104215.4U patent/CN209046532U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109412423A (en) * | 2018-12-14 | 2019-03-01 | 中国电子科技集团公司第四十三研究所 | It is a kind of list pulse width modulator Multiple isolated outputs circuit and isolation output method |
| CN112825454A (en) * | 2019-11-21 | 2021-05-21 | 复旦大学 | DCDC multichannel isolation output circuit for flywheel |
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