CN206077233U - A kind of double tube positive exciting type Switching Power Supply - Google Patents
A kind of double tube positive exciting type Switching Power Supply Download PDFInfo
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- CN206077233U CN206077233U CN201621082011.XU CN201621082011U CN206077233U CN 206077233 U CN206077233 U CN 206077233U CN 201621082011 U CN201621082011 U CN 201621082011U CN 206077233 U CN206077233 U CN 206077233U
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Abstract
The utility model discloses a kind of double tube positive exciting type Switching Power Supply, including main circuit, drive circuit, PWM controller, feedback circuit and input voltage observation circuit；The main circuit is used to complete voltage transformation and electric energy transmission；Drive circuit is used to transmit and strengthen PWM drive signal；Feedback circuit realizes output voltage stabilization with closed loop control for detecting output voltage and feeding back to PWM controller；Monitoring and protecting circuit is used for the input voltage of monitoring switch power supply, starts PWM controller when input voltage is in set point.This utility model reduces switching tube stress using double tube positive exciting type topology；PWM controller signal recommending output mode is devised, driving force is enhanced；Larger current to be provided to push-pull output circuit, it is ensured that driving force, devise an output on the switch transformer of main circuit up to the feedback winding of 4A；And isolation is realized using pulse transformer to drive signal.
Description
Technical field
This utility model belongs to Power Electronic Technique DC/DC conversion field, and in particular to a kind of double tube positive exciting type switch electricity
Source.
Background technology
With the progress of Power Electronic Technique, high voltage, modularity become power electronics development trend.Due to by electric power
Restriction that electronic device is pressure, high-voltage power electronic device can pass through power electronic devices or power switching device series, carry out work(
Rate synthesizes to realize.For the power electronic devices or device for power switching of series connection, the power supply of its drive module is a needs
The problem of solution.The power electronic devices or device for power switching of series connection can not be powered for its drive module using independent current source,
Because if being powered using independent current source, closer to the drive module of the device for power switching of high-voltage power electronic device positive pole,
Between the input and output of independent current source, relative voltage is higher, and the Switching Power Supply that power electronic devices or device for power switching are used
Often it is difficult to bear relative voltage between very high input and output, it is therefore desirable to directly take from high-pressure side by power taking resistance of connecting
Electricity carries out DC/DC conversion.The main topology for adopting of at present DC/DC conversion has Buck/Boost etc., but Buck/Boost circuits
Input and output voltage is altogether, it is impossible to realize the isolation of input and output voltage.
Therefore, it is necessary to design a kind of Switching Power Supply powered suitable for high-voltage power electronic device drive module.
Utility model content
The technical problem solved by this utility model is, for the deficiencies in the prior art, there is provided a kind of double tube positive exciting type is opened
Powered-down source, using double tube positive exciting single-ended topology, reduce main circuit switch pipe bears voltage to Switching Power Supply main circuit, passes through
Switch transformer transmits energy, realizes the isolation of input and output voltage.
The technical scheme adopted by this utility model solution technical problem is as follows：
A kind of double tube positive exciting type Switching Power Supply, including main circuit, drive circuit, PWM controller, feedback circuit and input electricity
Pressure observation circuit；
The input of the feedback circuit and input voltage observation circuit connects the voltage input end and electricity of main circuit respectively
Pressure outfan；
The outfan of the feedback circuit and input voltage observation circuit connects two inputs of PWM controller respectively；
The outfan Jing drive circuits of PWM controller connect the control end of main circuit；
The main circuit is used to complete voltage transformation and electric energy transmission；
The main circuit is double tube positive exciting code converter；
The double tube positive exciting code converter includes two metal-oxide-semiconductors Q1 and Q2, two diode D1 and D2 and switch transformer；
The drain electrode of metal-oxide-semiconductor Q1 meets Switching Power Supply input voltage positive pole DC+；At the beginning of the source electrode Jing switch transformers of metal-oxide-semiconductor Q1
Level coil connects the drain electrode of metal-oxide-semiconductor Q2；The source electrode of metal-oxide-semiconductor Q2 meets input voltage negative pole DC-；
Diode D1 is connected between the drain electrode of two metal-oxide-semiconductors reversely；That is the drain electrode of metal-oxide-semiconductor Q1 connects the negative pole of diode D1,
The drain electrode of metal-oxide-semiconductor Q2 connects the positive pole of diode D1；
Diode D2 is connected between the source electrode of two metal-oxide-semiconductors reversely；That is the source electrode of metal-oxide-semiconductor Q1 connects the negative pole of diode D2,
The source electrode of metal-oxide-semiconductor Q2 connects the positive pole of diode D2；
The grid of two metal-oxide-semiconductors connects the two-way drive signal of PWM controller Jing drive circuit output respectively.
Switching Power Supply input of the present utility model is up to 2100V, and power input voltage is higher, from pressure 2500V's
Metal-oxide-semiconductor is used as main circuit switch pipe；Simultaneously using double tube positive exciting type topology, metal-oxide-semiconductor voltage stress is reduced；
Principle of the present utility model is：
The input voltage observation circuit is used for the input voltage value for monitoring main circuit, when input voltage is in 1000-2100V
In the range of when, open PWM controller, and activate switch power supply；
The PWM controller is used for receives input monitoring and feedback signal and exports pwm control signal, to control to drive electricity
Road and main circuit；
Described drive circuit is located between PWM controller and main circuit, defeated for receiving and amplifying PWM power-supply controller of electric
The pwm control signal for going out, completes the driving of main circuit；
The main circuit, for completing to be input into 1000-2100Vdc voltages to output 5/15Vdc voltage transformations and electric energy biography
It is defeated；
The feedback circuit is exported and pwm control circuit between positioned at 5Vdc, for the closed loop control of output voltage, is realized
Output voltage stabilization；
Pulse transformer is further connected between the grid of the outfan of the drive circuit and two metal-oxide-semiconductors；Pulse transformer
Including a primary coil and two secondary coils；Primary coil connects the outfan of drive circuit；Two secondary coils are connect respectively
The grid of two metal-oxide-semiconductors；For two metal-oxide-semiconductor switching tube drive signal design pulse transformers, two metal-oxide-semiconductor switching tubes are realized not
The isolation of drive signal altogether.
The PWM controller is adopted as TL2842P control chips；
Divider resistance R1 and R2 are serially connected between Switching Power Supply input voltage both positive and negative polarity DC+ and DC-；TL2842P controls core
The power supply of piece terminates the junction point S of divider resistance R1 and R2；Electric capacity C is further connected between junction point S and input voltage negative pole DC-.
TL2842P starting currents are little, therefore take the mode of electric resistance partial pressure power taking, realize the startup of PWM controller.
The drive circuit is push-pull output circuit；
Institute's switch transformer is provided with feedback winding；
The push-pull output circuit includes NPN type triode Q3 and PNP type triode Q4；
The colelctor electrode of Q3 connects feedback winding；The emitter stage of Q3 is connected with the emitter stage of Q4；The colelctor electrode of Q4 connects Switching Power Supply
Input voltage negative pole DC-；The base stage of Q3 and Q4 is connected with the outfan of TL2842P control chips；
The primary coil of pulse transformer is connected between the colelctor electrode of the emitter stage and Q4 of Q4.
The feedback winding is also connected with the power end of TL2842P control chips.
Metal-oxide-semiconductor parasitic capacitance is larger, only is difficult to drive with TL2842P control chips, is to strengthen control signal driving force,
Push-pull output circuit is devised in the outfan of PWM controller；
The power supply of PWM controller and push-pull circuit after starting for Switching Power Supply, in main circuit switch design of transformer
Larger feedback winding, output current reach 4A.
The feedback circuit includes optocoupler PC817；The voltage output end of the input termination main circuit of optocoupler PC817, optocoupler
The output termination PWM controller of PC817.
Input voltage observation circuit includes LM293D comparators；One input termination divider resistance R1 of LM293D comparators
With the junction point S of R2, another input termination reference voltage, output termination PWM controller.Input voltage observation circuit is using electricity
Resistance carries out partial pressure sampling to input voltage, and is compared using LM293D comparators, when input voltage is in set point
When, start PWM controller.
Beneficial effect：
The utility model discloses a kind of is 1000- suitable for the input that high-voltage power electronic device drive module is powered
The double tube positive exciting DC/DC power supplys of 2100Vdc.With advantages below：
1) this utility model uses two metal-oxide-semiconductors and diode by adopting double tube positive exciting type DC/DC topology, the topology,
Each metal-oxide-semiconductor voltage stress is equal to input voltage value, reduces switch tube voltage stress with respect to other circuits, and is become by switching
Depressor transmits energy, realizes the isolation of input and output voltage；
2) this utility model input voltage is up to 2100V, and from the metal-oxide-semiconductor of 2500V, parasitic capacitance is larger, needs larger
Driving current, therefore devise recommending output mode in PWM controller delivery outlet, increased the driving energy to main circuit switch pipe
Power；
3) one larger feedback winding in main circuit switch design of transformer, output current reaches 4A, is TL2842P controls
Device pwm signal recommending output mode is powered, to ensure driving force；
4) from TL2842P control chips, TL2842P control chip starting currents are less, can be by divider resistance during startup
Power taking, by main circuit switch transformer feedback winding power after startup；
5) due to two switching tubes of double tube positive exciting not altogether, therefore drive signal is carried out pulse transformer is devised
Isolation.
Description of the drawings
Fig. 1 is this utility model structured flowchart；
Fig. 2 is PWM controller functional block diagram in this utility model；
Fig. 3 is PWM controller and driver circuit schematic diagram in this utility model；
Fig. 4 is main circuit schematic diagram in this utility model；
Specific embodiment
Below in conjunction with the accompanying drawings this utility model is described in detail.Below in conjunction with each modular circuit example, to this practicality
It is new to be further described, but do not constitute to any restriction of the present utility model, in practice, these circuit forms can be carried out
Different building and changing.
With reference to Fig. 1, the figure is theory structure block diagram of the present utility model, this utility model include main circuit, drive circuit,
PWM controller, feedback circuit and input voltage observation circuit.Described main circuit realizes that 1000～2100V of direct current is transformed into directly
Stream 5/15V；Drive circuit is used to receive the control signal of PWM controller and be strengthened, to drive main circuit switch device；
PWM controller is used for receives input voltage monitoring signal and output feedback signal, and according to the change output PWM of the signal for receiving
Control signal；Feedback circuit is used to detect main circuit output voltage, is isolated by optocoupler PC817, and be sent to PWM controls
Device；Input voltage observation circuit carries out partial pressure sampling using resistance, and is compared using LM293D comparators, works as input voltage
Between 1000～2100V when, export high level, otherwise export low level close PWM controller.
With reference to Fig. 2, the figure is PWM controller functional block diagram.The power supply PWM controller controls core using TL2842P
Piece, the controller input signal have input voltage monitoring signals and output voltage feedback signal.Input voltage observation circuit according to
Input voltage size exports corresponding low and high level, to control the start and stop of PWM controller；Output voltage feedback signal is according to feedback
Circuit real-time detection value Jing light-coupled isolation is input into controller, and controller exports the pwm signal of corresponding pulsewidth, and Jing push-pull circuits increase
By pulse transformer driving switch device after strong, to maintain output voltage stabilization.
With reference to Fig. 3, the figure is this utility model PWM controller and driver circuit schematic diagram.DC+ and DC- is the switch electricity
The input voltage both positive and negative polarity in source.The characteristics of TL2842P control chips have starting current little, starting current are less than 1mA, Jing partial pressures
Electric resistance partial pressure and electric capacity C start controller after charging, output pwm control signal Jing push-pull output circuits strengthen, then passages through which vital energy circulates punching becomes
Metal-oxide-semiconductor Q1, Q2 are driven after depressor isolation；As shown in figure 4, by transformer feedback winding is for TL2842P and recommends after power initiation
Circuit is powered, and the transformer feedback Winding Design obtains larger, and output current reaches 4A；After recommending output mode Jing after pulse transformer isolation
Realize the isolation of metal-oxide-semiconductor drive signal.
With reference to Fig. 4, the figure is the main circuit schematic diagram of this utility model double tube positive exciting Switching Power Supply.The main circuit uses two
Individual switching tube, metal-oxide-semiconductor Q1, Q2 are simultaneously turned on and are turned off, and diode D1, D2 make each metal-oxide-semiconductor be subjected only to stress voltage when turning off
For one times of input voltage；Then Jing switch transformers enter line translation, and are exported into 5V/15V two-way by rectifying and wave-filtering.
This utility model Switching Power Supply input voltage is up to 2100V, using double tube positive exciting type topology, reduces switching tube
Stress；Select the metal-oxide-semiconductor of pressure 2500V as switching tube, metal-oxide-semiconductor parasitic capacitance is larger, but controller chip driving current
It is less, it is difficult to drive, therefore controller pwm signal recommending output mode is devised, enhance driving force；It is to push-pull output circuit
There is provided larger current, it is ensured that driving force, an output is devised on the switch transformer of main circuit up to the feedback winding of 4A；
And isolation is realized using pulse transformer to drive signal.
The above is only an instantiation of the present utility model, do not constitute to any restriction of the present utility model.Obviously it is right
For one of skill in the art, after this utility model content and principle is understood, all can not away from this utility model principle,
In the case of structure, the various modifications and changes in form and details are carried out, but these repairing based on this utility model thought
Just with change still within claims of the present utility model.
Claims (7)
1. a kind of double tube positive exciting type Switching Power Supply, it is characterised in that：Including main circuit, drive circuit, PWM controller, feedback electricity
Road and input voltage observation circuit；
The voltage input end and voltage that the input of the feedback circuit and input voltage observation circuit connects main circuit respectively is defeated
Go out end；
The outfan of the feedback circuit and input voltage observation circuit connects two inputs of PWM controller respectively；
The outfan Jing drive circuits of PWM controller connect the control end of main circuit；
The main circuit is used to complete voltage transformation and electric energy transmission；
The main circuit is double tube positive exciting code converter；
The double tube positive exciting code converter includes two metal-oxide-semiconductors Q1 and Q2, two diode D1 and D2 and switch transformer；
The drain electrode of metal-oxide-semiconductor Q1 meets Switching Power Supply input voltage positive pole DC+；The primary line of the source electrode Jing switch transformers of metal-oxide-semiconductor Q1
Circle connects the drain electrode of metal-oxide-semiconductor Q2；The source electrode of metal-oxide-semiconductor Q2 meets input voltage negative pole DC-；
Diode D1 is connected between the drain electrode of two metal-oxide-semiconductors reversely；
Diode D2 is connected between the source electrode of two metal-oxide-semiconductors reversely；
The grid of two metal-oxide-semiconductors connects the two-way drive signal of PWM controller Jing drive circuit output respectively.
2. double tube positive exciting type Switching Power Supply as claimed in claim 1, it is characterised in that：The outfan of the drive circuit and two
Pulse transformer is further connected between the grid of individual metal-oxide-semiconductor；Pulse transformer includes a primary coil and two secondary coils；Just
Level coil connects the outfan of drive circuit；Two secondary coils connect the grid of two metal-oxide-semiconductors respectively.
3. double tube positive exciting type Switching Power Supply as claimed in claim 1, it is characterised in that：The PWM controller is adopted as
TL2842P control chips；
Divider resistance R1 and R2 are serially connected between Switching Power Supply input voltage both positive and negative polarity DC+ and DC-；TL2842P control chips
Power supply terminates the junction point S of divider resistance R1 and R2；Electric capacity C is further connected between junction point S and input voltage negative pole DC-.
4. double tube positive exciting type Switching Power Supply as claimed in claim 3, it is characterised in that：The drive circuit is recommending output mode electricity
Road；
The switch transformer is provided with feedback winding；
The push-pull output circuit includes NPN type triode Q3 and PNP type triode Q4；
The colelctor electrode of Q3 connects feedback winding；The emitter stage of Q3 is connected with the emitter stage of Q4；The colelctor electrode of Q4 connects Switching Power Supply input
Voltage negative pole DC-；The base stage of Q3 and Q4 is connected with the outfan of TL2842P control chips；
The primary coil of pulse transformer is connected between the colelctor electrode of the emitter stage and Q4 of Q4.
5. double tube positive exciting type Switching Power Supply as claimed in claim 4, it is characterised in that：The feedback winding is also connected with
The power end of TL2842P control chips.
6. the double tube positive exciting type Switching Power Supply as any one of Claims 1 to 5, it is characterised in that：The feedback circuit
Including optocoupler PC817；The voltage output end of the input termination main circuit of optocoupler PC817, the output termination PWM controls of optocoupler PC817
Device processed.
7. the double tube positive exciting type Switching Power Supply as any one of claim 3～5, it is characterised in that：Input voltage is monitored
Circuit includes LM293D comparators；The junction point S of one input termination divider resistance R1 and R2 of LM293D comparators, another
Input termination reference voltage, output termination PWM controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621082011.XU CN206077233U (en) | 2016-09-27 | 2016-09-27 | A kind of double tube positive exciting type Switching Power Supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621082011.XU CN206077233U (en) | 2016-09-27 | 2016-09-27 | A kind of double tube positive exciting type Switching Power Supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206077233U true CN206077233U (en) | 2017-04-05 |
Family
ID=58440757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621082011.XU Active CN206077233U (en) | 2016-09-27 | 2016-09-27 | A kind of double tube positive exciting type Switching Power Supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206077233U (en) |
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2016
- 2016-09-27 CN CN201621082011.XU patent/CN206077233U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 410100 5 East three road, Changsha economic and Technological Development Zone, Changsha, Hunan Co-patentee after: Hunan the Great Wall Hai Dun Optical Fiber Technology Co., Ltd. Patentee after: Changsha HCC HIDEN Technology Co., Ltd. Address before: 410100 5 East three road, Changsha economic and Technological Development Zone, Changsha, Hunan Co-patentee before: Hunan Haidun Optical Fiber Sensing Technology Engineering Laboratory Co., Ltd. Patentee before: Changsha HCC HIDEN Technology Co., Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20181114 Address after: 410205 A076, Headquarters Building of Zhongdian Software Park, 39 Jianshan Road, Changsha High-tech Development Zone, Hunan Province Patentee after: Hunan the Great Wall Hai Dun Optical Fiber Technology Co., Ltd. Address before: 410100 5 East three road, Changsha economic and Technological Development Zone, Changsha, Hunan Co-patentee before: Hunan the Great Wall Hai Dun Optical Fiber Technology Co., Ltd. Patentee before: Changsha HCC HIDEN Technology Co., Ltd. |
|
| TR01 | Transfer of patent right |