CN207910687U - A kind of multiple-channel output circuit of reversed excitation of no auxiliary winding - Google Patents
A kind of multiple-channel output circuit of reversed excitation of no auxiliary winding Download PDFInfo
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- CN207910687U CN207910687U CN201820368221.8U CN201820368221U CN207910687U CN 207910687 U CN207910687 U CN 207910687U CN 201820368221 U CN201820368221 U CN 201820368221U CN 207910687 U CN207910687 U CN 207910687U
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Abstract
The utility model discloses a kind of multiple-channel output circuit of reversed excitation of no auxiliary winding, including input circuit, start-up circuit, clamp circuit, power conversion circuit, output power supply circuit, output circuit, feedback circuit, pwm control circuit；Wherein, the input circuit, start-up circuit, clamp circuit, power conversion circuit, output power supply circuit are sequentially connected, the input terminal of feedback circuit is connect with the output end of output power supply circuit, input terminal in the output end connection pwm control circuit of feedback circuit, the output end of pwm control circuit connect power conversion circuit.The utility model eliminates auxiliary winding, reduces volume of transformer, reduces the loss on transformer；The utility model is in exporting power supply circuit while not influencing secondary side output voltage, voltage is generated using the 4th resistance of the 5th resistance of fictitious load and absorbing inverse-voltage peak, third Absorption Capacitance, it powers to controller chip instead of auxiliary winding, not only reduces cost, but also improve efficiency.
Description
Technical field
The utility model is related to track Car's door controlling field more particularly to a kind of multiple-channel output flyback electricity of no auxiliary winding
Road.
Background technology
The power circuit in current track Car's door controlling field is typically all the inverse-excitation type switch power-supply electricity of included auxiliary winding
Road, auxiliary winding gives switching power source chip power supply after circuit start, forms self-excitation feedback, ensures the work of circuit normal table.But
It is to increase auxiliary winding can not only increase volume of transformer, while also increasing the power consumption of auxiliary winding itself, reduces switch electricity
The working efficiency in source.
In existing Car's door controlling application, client is more and more harsh to installation space, the performance requirement of Car's door controlling device,
Car's door controlling device compact, performance higher are asked, therefore is badly in need of a kind of power circuit, not only reduces power volume, improves simultaneously
Switch power efficiency will more meet client to Car's door controlling device small size, high performance requirement.
Utility model content
Goal of the invention：In view of the above problems, the utility model proposes a kind of multiple-channel output circuit of reversed excitation of no auxiliary winding,
Switching Power Supply volume can be reduced, improve working efficiency.
Technical solution：To realize above-mentioned purpose of design, technical solution is used by the utility model：It is a kind of without auxiliary around
The multiple-channel output circuit of reversed excitation of group, including input circuit, start-up circuit, clamp circuit, power conversion circuit, output power supply electricity
Road, output circuit, feedback circuit, pwm control circuit；Wherein, the input circuit, start-up circuit, clamp circuit, power conversion
Circuit, output power supply circuit are sequentially connected, and the input terminal of feedback circuit is connect with the output end of output power supply circuit, feedback circuit
Output end connection pwm control circuit in input terminal, the output end of pwm control circuit connects power conversion circuit.
Further, the input circuit includes the first electrolytic capacitor, the anode of the first electrolytic capacitor and input voltage
Anode, start-up circuit, clamp circuit, power conversion circuit are all connected with, the minus earth of the first electrolytic capacitor.
Further, the start-up circuit includes the first start-up resistor, the first voltage-stabiliser tube, the second electrolytic capacitor, the first suction
Receive capacitance；The anode of first voltage-stabiliser tube, the cathode of the second electrolytic capacitor, the first Absorption Capacitance cathode altogether, the first voltage-stabiliser tube
Cathode connect with the anode of the anode of the second electrolytic capacitor, the first Absorption Capacitance and be followed by upper first start-up resistor, first starts
The other end of resistance and the anode of input voltage, input circuit, clamp circuit, power conversion circuit are all connected with.
Further, the clamp circuit includes first resistor, the second Absorption Capacitance, the first rectifier diode；First electricity
Resistance is connected with after the second Absorption Capacitance parallel connection with the cathode of the first rectifier diode, after first resistor is in parallel with the second Absorption Capacitance
The other end and anode, input circuit, start-up circuit, the power conversion circuit of input voltage be all connected with, the first rectifier diode
Anode connect with power conversion circuit.
Further, the power conversion circuit includes the first high frequency transformer, the first metal-oxide-semiconductor, second resistance, third electricity
Resistance；1 foot of the first high frequency transformer and anode, input circuit, start-up circuit, the clamp circuit of input voltage are all connected with, and first
2 feet of high frequency transformer are all connected with 2 feet, the clamp circuit of the first metal-oxide-semiconductor, and 1 foot and 3 feet of the first metal-oxide-semiconductor are respectively with second
Resistance, 3rd resistor connection, the other end of second resistance are connect with pwm control circuit, the other end ground connection of 3rd resistor.
Further, the output power supply circuit includes the first high frequency transformer, the 4th resistance, the 5th resistance, third suction
Receive capacitance, the 4th Absorption Capacitance, third electrolytic capacitor, the second voltage-stabiliser tube, the second rectifier diode, third rectifier diode, the
Four rectifier diodes；Wherein, the 4th resistance, third Absorption Capacitance, third rectifier diode series connection, the other end of the 4th resistance with
5 feet of the first high frequency transformer, the anode of the second rectifier diode are connected, the anode of third rectifier diode and the first high frequency
It is grounded after the 6 feet connection of transformer, the cathode of third rectifier diode is connect with the anode of the 4th rectifier diode, the 4th rectification
The cathode of diode is connected with the cathode of the second voltage-stabiliser tube, the 5th resistance, the 4th Absorption Capacitance, pwm control circuit, and second is steady
The anode of pressure pipe is grounded after being connect with the other end of the 4th Absorption Capacitance, the other end of the 5th resistance and the second rectifier diode
Cathode, the anode of third electrolytic capacitor, feedback circuit are all connected with, the minus earth of third electrolytic capacitor.
Further, the output circuit includes the 6th resistance, the 5th Absorption Capacitance, the 4th electrolytic capacitor, the 5th rectification
Diode；, fiveth Absorption Capacitance and fiveth rectification in parallel with the 5th rectifier diode after 6th resistance, the series connection of the 5th Absorption Capacitance
The tie point of diode anode is connected with 3 feet of the first high frequency transformer, the company of the 6th resistance and the 5th rectifier diode cathode
Contact is connected with the anode of the 4th electrolytic capacitor, and the cathode of the 4th electrolytic capacitor connect with 4 feet of the first high frequency transformer and is followed by
Ground.
Further, the feedback circuit includes the 7th resistance, the 8th resistance；7th resistance is connected with the 8th resistance, even
Contact is connected with pwm control circuit, and the other end of the 7th resistance is connected with output power supply circuit, another termination of the 8th resistance
Ground.
Further, the pwm control circuit includes current-mode controller chip, the 9th resistance, the tenth resistance, the 11st
Resistance, the 6th Absorption Capacitance, the 7th Absorption Capacitance, the 8th Absorption Capacitance, the 9th Absorption Capacitance；Eleventh resistor is absorbed with the 9th
Both ends after capacitance parallel connection are connected with 1 foot of current-mode controller chip and 2 feet respectively, 2 feet of current-mode controller chip with
Feedback circuit be connected, 8 feet of current-mode controller chip are connected with the 7th Absorption Capacitance, the tenth resistance, the tenth resistance it is another
End is connected with 4 feet of the 8th Absorption Capacitance, current-mode controller chip, the other end and the 8th Absorption Capacitance of the 7th Absorption Capacitance
Other end connection after be grounded, 7 feet of current-mode controller chip and start-up circuit export power supply circuit and are all connected with, current mode
3 feet of controller chip are connected with the 6th Absorption Capacitance, the 9th resistance, the other end and current-mode control of the 6th Absorption Capacitance
It being grounded after the 5 feet connection of device chip, the other end of the 9th resistance is connected with power conversion circuit, and the 6 of current-mode controller chip
Foot is connected with power conversion circuit.
Advantageous effect：The utility model eliminates auxiliary winding, reduces volume of transformer, reduces the damage on transformer
Consumption；Compared to the output circuit of conventional reverse exciting switching voltage regulator, the utility model is not influencing secondary side output in exporting power supply circuit
While voltage, voltage is generated using the 4th resistance of the 5th resistance of fictitious load and absorbing inverse-voltage peak, third Absorption Capacitance,
It powers to controller chip instead of auxiliary winding, not only reduces cost, but also improve efficiency.
Description of the drawings
Fig. 1 is the hardware configuration frame diagram of the utility model；
Fig. 2 is the hardware circuit principle figure of the utility model.
Specific implementation mode
The technical solution of the utility model is further described with reference to the accompanying drawings and examples.
The multiple-channel output circuit of reversed excitation of no auxiliary winding described in the utility model, hardware configuration frame diagram such as Fig. 1 institutes
Show, including input circuit 2, start-up circuit 4, clamp circuit 6, power conversion circuit 8, output circuit 11, output power supply circuit 12,
Feedback circuit 14, pwm control circuit 16.Input circuit 2, start-up circuit 4, clamp circuit 6, power are sequentially connected with electric signal to become
Circuit 8, output power supply circuit 12 are changed, is then controlled feedback signal back to pwm control circuit 16 by feedback circuit 14
Power conversion circuit 8, to ensure the stability of power supply output.
The hardware circuit principle figure of the utility model is as shown in Figure 2, wherein input circuit 2 includes the first electrolytic capacitor C4.
Mostly based on direct current, input circuit 2 is further filtered voltage by the voltage to access in track industry, ensures input voltage more
Add smooth.
Start-up circuit 4 includes the first start-up resistor R6, the first voltage-stabiliser tube D5, the second electrolytic capacitor C10, the first Absorption Capacitance
C9.After the voltage of input circuit 2 comes, flowing through the electric current of the first start-up resistor R6 will charge to the second electrolytic capacitor C10,
After second electrolytic capacitor C10 is increased to the startup voltage of controller chip, circuit is started to work.Wherein, the first voltage-stabiliser tube D5 is protected
Voltage will not rise to a controller wafer damage on card capacitance, and the first Absorption Capacitance C9 is further filtered, the first start-up resistor
Electric current is bigger in R6, then power initiation speed is bigger, but corresponding resistance loss is also bigger.
Clamp circuit 6 includes first resistor R7, the second Absorption Capacitance C5, the first rectifier diode D6.When power supply starts work
After work, due to that when the first metal-oxide-semiconductor Q1 shutdowns, can be produced on the primary side inductance of the first high frequency transformer T1 in power-varying circuitry 8
Raw leakage inductance spike, clamp circuit 6 can be by the energy transfers of leakage inductance spike to the second Absorption Capacitance C5, and on first resistor R7
Consumption, can effectively inhibit leakage inductance spike.
Power conversion circuit 8 includes the first high frequency transformer T1, the first metal-oxide-semiconductor Q1, second resistance R9,3rd resistor R8.
On the contrary, when the first metal-oxide-semiconductor Q1 conductings, the first high frequency becomes the polarity of the first high frequency transformer T1 primary and secondary side windings in circuit
Depressor T1 primary side inductive currents are begun to ramp up, and at this time due to the relationship of secondary Same Name of Ends, export the second rectification in power supply circuit 12
Diode D1 cut-offs, the first high frequency transformer T1 store energy, and load is carried by third electrolytic capacitor C3 in output power supply circuit 12
For energy；When the first metal-oxide-semiconductor Q1 cut-offs, the first high frequency transformer T1 primary side inductance induced voltages are reversed, the second rectification at this time
Diode D1 conducting, the energy in the first high frequency transformer T1 power to the load via the second rectifier diode D1, while to the
Three electrolytic capacitor C3 chargings, supplement the energy just lost.
It includes the first high frequency transformer T1, the 4th resistance R1, the 5th resistance R2, third Absorption Capacitance to export power supply circuit 12
C1, the 4th Absorption Capacitance C2, third electrolytic capacitor C3, the second voltage-stabiliser tube D4, the second rectifier diode D1, third rectifier diode
D2, the 4th rectifier diode D3.Electricity is absorbed using the 4th resistance R1 of the 5th resistance R2 of fictitious load and absorbing inverse-voltage peak, third
The circuit for holding C1 compositions generates VCC to power to controller chip.
Output circuit 11 includes the 6th resistance R5, the 5th Absorption Capacitance C11, the 4th electrolytic capacitor C12, two pole of the 5th rectification
Pipe D7.Stable output voltage is generated with the circuit of the secondary inductance composition of the first high frequency transformer T1 in power conversion circuit 8
Uout2。
Feedback circuit 14 includes the 7th resistance R3, the 8th resistance R4.Power supply circuit will be exported by the principle of electric resistance partial pressure
12 output voltage real-time sampling feeds back to pwm control circuit 16, to ensure the promptness of voltage change response.
Pwm control circuit 16 includes current-mode controller chip U1, the 9th resistance R10, the tenth resistance R11, the 11st electricity
Hinder R12, the 6th Absorption Capacitance C6, the 7th Absorption Capacitance C7, the 8th Absorption Capacitance C8, the 9th Absorption Capacitance C11.Wherein, the tenth
The circuit that one resistance R12, the 9th Absorption Capacitance C11 are formed with the transport and placing device inside current-mode controller chip U1 is to feedback circuit
The signal that 14 feedbacks come carries out real-time compensation, and the circuit that the tenth resistance R11, the 7th Absorption Capacitance C7 are formed is to current-mode control
Device chip U1 provides clock signal, and the circuit that the 9th resistance R10, the 6th Absorption Capacitance C6 are formed is to 8 Central Plains of power conversion circuit
The sampled signal of side electric current is filtered.
Claims (9)
1. a kind of multiple-channel output circuit of reversed excitation of no auxiliary winding, it is characterised in that：Including input circuit (2), start-up circuit
(4), clamp circuit (6), power conversion circuit (8), output power supply circuit (12), output circuit (11), feedback circuit (14),
Pwm control circuit (16)；Wherein, the input circuit, start-up circuit, clamp circuit, power conversion circuit, output power supply circuit
It is sequentially connected, the input terminal of feedback circuit is connect with the output end of output power supply circuit, the output end connection PWM controls of feedback circuit
The output end of input terminal in circuit processed, pwm control circuit connects power conversion circuit.
2. the multiple-channel output circuit of reversed excitation of no auxiliary winding according to claim 1, it is characterised in that：The input circuit
Including the first electrolytic capacitor (C4), the anode of the first electrolytic capacitor (C4) and the anode of input voltage, start-up circuit, clamp electricity
Road, power conversion circuit are all connected with, the minus earth of the first electrolytic capacitor (C4).
3. the multiple-channel output circuit of reversed excitation of no auxiliary winding according to claim 1, it is characterised in that：The start-up circuit
Including the first start-up resistor (R6), the first voltage-stabiliser tube (D5), the second electrolytic capacitor (C10), the first Absorption Capacitance (C9)；First is steady
The anode of pressure pipe (D5), the cathode of the second electrolytic capacitor (C10), the first Absorption Capacitance (C9) cathode altogether, the first voltage-stabiliser tube
(D5) cathode is connect with the anode of the anode of the second electrolytic capacitor (C10), the first Absorption Capacitance (C9) is followed by upper first startup
Resistance (R6), the other end of the first start-up resistor (R6) and anode, input circuit, clamp circuit, the power conversion of input voltage
Circuit is all connected with.
4. the multiple-channel output circuit of reversed excitation of no auxiliary winding according to claim 1, it is characterised in that：The clamp circuit
Including first resistor (R7), the second Absorption Capacitance (C5), the first rectifier diode (D6)；First resistor (R7) absorbs electricity with second
It is connected with the cathode of the first rectifier diode (D6) after holding (C5) parallel connection, first resistor (R7) is in parallel with the second Absorption Capacitance (C5)
Anode, input circuit, start-up circuit, the power conversion circuit of the other end and input voltage afterwards are all connected with, two pole of the first rectification
The anode of pipe (D6) is connect with power conversion circuit.
5. the multiple-channel output circuit of reversed excitation of no auxiliary winding according to claim 1, it is characterised in that：The power conversion
Circuit includes the first high frequency transformer (T1), the first metal-oxide-semiconductor (Q1), second resistance (R9), 3rd resistor (R8)；First high frequency becomes
1 foot of depressor (T1) and anode, input circuit, start-up circuit, the clamp circuit of input voltage are all connected with, the first high frequency transformer
(T1) 2 feet, the clamp circuit of 2 feet and the first metal-oxide-semiconductor (Q1) are all connected with, and 1 foot and 3 feet of the first metal-oxide-semiconductor (Q1) are respectively with
Two resistance (R9), 3rd resistor (R8) connection, the other end of second resistance (R9) are connect with pwm control circuit, 3rd resistor
(R8) other end ground connection.
6. the multiple-channel output circuit of reversed excitation of no auxiliary winding according to claim 1, it is characterised in that：The output power supply
Circuit includes the first high frequency transformer (T1), the 4th resistance (R1), the 5th resistance (R2), third Absorption Capacitance (C1), the 4th suction
Receive capacitance (C2), third electrolytic capacitor (C3), the second voltage-stabiliser tube (D4), the second rectifier diode (D1), third rectifier diode
(D2), the 4th rectifier diode (D3)；Wherein, the 4th resistance (R1), third Absorption Capacitance (C1), third rectifier diode (D2)
Series connection, the anode phase of the other end of the 4th resistance (R1) and 5 feet of the first high frequency transformer (T1), the second rectifier diode (D1)
Connection, the anode of third rectifier diode (D2) are grounded after being connect with 6 feet of the first high frequency transformer (T1), two pole of third rectification
The cathode of pipe (D2) is connect with the anode of the 4th rectifier diode (D3), the cathode of the 4th rectifier diode (D3) and the second voltage stabilizing
Cathode, the 5th resistance (R2), the 4th Absorption Capacitance (C2), the pwm control circuit of pipe (D4) are connected, the second voltage-stabiliser tube (D4)
Anode is grounded after being connect with the other end of the 4th Absorption Capacitance (C2), the other end and the second rectifier diode of the 5th resistance (R2)
(D1) anode, the feedback circuit of cathode, third electrolytic capacitor (C3) are all connected with, the minus earth of third electrolytic capacitor (C3).
7. the multiple-channel output circuit of reversed excitation of no auxiliary winding according to claim 1, it is characterised in that：The output circuit
Including the 6th resistance (R5), the 5th Absorption Capacitance (C11), the 4th electrolytic capacitor (C12), the 5th rectifier diode (D7)；6th
Resistance (R5), the 5th Absorption Capacitance (C11) series connection after it is in parallel with the 5th rectifier diode (D7), the 5th Absorption Capacitance (C11) and
The tie point of the 5th rectifier diode (D7) anode is connected with 3 feet of the first high frequency transformer (T1), the 6th resistance (R5) and the
The tie point of five rectifier diodes (D7) cathode is connected with the anode of the 4th electrolytic capacitor (C12), the 4th electrolytic capacitor (C12)
Cathode is grounded after being connect with 4 feet of the first high frequency transformer (T1).
8. the multiple-channel output circuit of reversed excitation of no auxiliary winding according to claim 1, it is characterised in that：The feedback circuit
Including the 7th resistance (R3), the 8th resistance (R4)；7th resistance (R3) is connected with the 8th resistance (R4), and tie point is controlled with PWM
Circuit is connected, and the other end of the 7th resistance (R3) is connected with output power supply circuit, the other end ground connection of the 8th resistance (R4).
9. the multiple-channel output circuit of reversed excitation of no auxiliary winding according to claim 1, it is characterised in that：The PWM controls
Circuit includes current-mode controller chip (U1), the 9th resistance (R10), the tenth resistance (R11), eleventh resistor (R12), the 6th
Absorption Capacitance (C6), the 7th Absorption Capacitance (C7), the 8th Absorption Capacitance (C8), the 9th Absorption Capacitance (C11)；Eleventh resistor
(R12) it is connected respectively with 1 foot of current-mode controller chip (U1) and 2 feet with the both ends after the parallel connection of the 9th Absorption Capacitance (C11),
2 feet of current-mode controller chip (U1) are connected with feedback circuit, and 8 feet of current-mode controller chip (U1) and the 7th absorb electricity
Hold (C7), the tenth resistance (R11) is connected, the other end and the 8th Absorption Capacitance (C8), current-mode controller of the tenth resistance (R11)
4 feet of chip (U1) are connected, and the other end of the 7th Absorption Capacitance (C7) is connect with the other end of the 8th Absorption Capacitance (C8) to be followed by
Ground, 7 feet and start-up circuit, the output power supply circuit of current-mode controller chip (U1) are all connected with, current-mode controller chip
(U1) 3 feet are connected with the 6th Absorption Capacitance (C6), the 9th resistance (R10), the other end and the electricity of the 6th Absorption Capacitance (C6)
It is grounded after the 5 feet connection of flow pattern controller chip (U1), the other end of the 9th resistance (R10) is connected with power conversion circuit, electricity
6 feet of flow pattern controller chip (U1) are connected with power conversion circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820368221.8U CN207910687U (en) | 2018-03-19 | 2018-03-19 | A kind of multiple-channel output circuit of reversed excitation of no auxiliary winding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820368221.8U CN207910687U (en) | 2018-03-19 | 2018-03-19 | A kind of multiple-channel output circuit of reversed excitation of no auxiliary winding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207910687U true CN207910687U (en) | 2018-09-25 |
Family
ID=63558223
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820368221.8U Active CN207910687U (en) | 2018-03-19 | 2018-03-19 | A kind of multiple-channel output circuit of reversed excitation of no auxiliary winding |
Country Status (1)
| Country | Link |
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| CN (1) | CN207910687U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109660136A (en) * | 2019-01-28 | 2019-04-19 | 国网安徽省电力有限公司淮北供电公司 | A kind of three-phase apparent source of the high input high conversion efficiency using double-transistor flyback |
-
2018
- 2018-03-19 CN CN201820368221.8U patent/CN207910687U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109660136A (en) * | 2019-01-28 | 2019-04-19 | 国网安徽省电力有限公司淮北供电公司 | A kind of three-phase apparent source of the high input high conversion efficiency using double-transistor flyback |
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