CN202475263U - High-voltage direct-current input quasi-resonance flyback switching power supply - Google Patents
High-voltage direct-current input quasi-resonance flyback switching power supply Download PDFInfo
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Abstract
A high-voltage direct-current input quasi-resonance flyback switching power supply comprises a synchronous rectifying circuit, a voltage feed-forward compensation circuit and a voltage feedback control circuit which are respectively connected with a control circuit, wherein the synchronous rectifying circuit is also connected with an RC absorption circuit, a first low-voltage switching power supply circuit and a linear power supply circuit respectively, the first low-voltage switching power supply circuit is also connected with an output filter circuit and is also provided with a standby power supply circuit which is formed by a direct-current input super capacitor and a second low-voltage switching power supply circuit connected with the direct-current input super capacitor, wherein the direct-current input super capacitor is connected with the synchronous rectifying circuit and the voltage feedback control circuit respectively. According to the high-voltage direct-current input quasi-resonance flyback switching power supply, due to the comprehensive current regulating mode and a demagnetizing detection function, leakage-source voltage of an ESBT (Emitter Switched Bipolar Transistor) is reduced to be lowest by the turn-off time of a delay switch under the condition that the power supply is in the any output load and any linear input voltage, so that the critical mode is ensured, the lowest drain voltage is used for switching on and off, the spike interference can be reduced, and finally the purpose of reducing loss is achieved.
Description
Technical field
The utility model relates to a kind of Switching Power Supply.Particularly relate to a kind of high efficiency, low cost is applicable to the HVDC input quasi-resonance inverse-excitation type switch power-supply in the fields such as instrument and meter, industrial equipment of wide input voltage range.
Background technology
Switching Power Supply is a kind of D.C. regulated power supply that adopts on-off mode control, and its characteristics small-sized, in light weight, that efficient is high are widely used in electronic equipment.Under traditional switch power technology, because the restriction of power device performance, thereby the performance of Switching Power Supply is affected, cause volume big, problem such as power consumption is big, and EMI is big.Thereby also just exist the cost height, the problem of narrow application range.The world today all is being " energy-conservation, reduce discharging " and effort, so that traditional switch power technology is difficult to satisfy is energy-conservation, and the requirement of reduction of discharging.
Summary of the invention
The utility model technical problem to be solved is, a kind of wide input voltage range preferably is provided, and volume is little, and EMI is little, and efficient is high, the HVDC input quasi-resonance inverse-excitation type switch power-supply that cost is low.
The technical scheme that the utility model adopted is: a kind of HVDC input quasi-resonance inverse-excitation type switch power-supply; Comprise: control circuit; The circuit of synchronous rectification that links to each other with control circuit respectively, electric voltage feed forward compensating circuit and Voltage Feedback control circuit, described circuit of synchronous rectification also connect RC respectively and absorb circuit; The first low tension switch power circuit and linear power supply circuit; The described first low tension switch power circuit also connects output filter circuit, also is provided with the stand-by power supply circuit, is by direct current input super capacitor and the second low tension switch power circuit that links to each other with direct current input super capacitor; Wherein, direct current input super capacitor connects circuit of synchronous rectification and Voltage Feedback control circuit respectively.
Described circuit of synchronous rectification comprises emitter-base bandgap grading switching bipolar transistor Q1; Anti-violent change depressor T2; High frequency transformer T1, the C utmost point of said emitter-base bandgap grading switching bipolar transistor Q1 connects the elementary winding of anti-violent change depressor T2, another termination DC high-voltage power supply of this elementary winding; The B utmost point of said emitter-base bandgap grading switching bipolar transistor Q1 connects an end of anti-violent change depressor T2 secondary coil, an end of resistance R 11 and an end of resistance R 16 respectively; The other end of anti-violent change depressor T2 secondary coil is through diode D10 respectively an end, the other end of resistance R 11, an end of capacitor C 8 and the end of voltage stabilizing didoe D9 of connecting resistance R13, and an end of said capacitor C 8 and the other end of voltage stabilizing didoe D9 are connected an end of resistance R 16, resistance R 17 and resistance R 15, the other end ground connection of resistance R 17 respectively; The other end connection control circuit of resistance R 15; The G utmost point of said emitter-base bandgap grading switching bipolar transistor Q1 connects diode D11 and control circuit respectively through resistance R 12, the other end of the other end connecting resistance R13 of diode D11, and the E utmost point of said emitter-base bandgap grading switching bipolar transistor Q1 is through resistance R 17 ground connection; The 1st, 5 terminations of the primary coil of said high frequency transformer T1 connect and directly connect DC high-voltage power supply; The 7th termination connects DC high-voltage power supply through diode D6 and resistance R 5 successively, and said resistance R 5 is also respectively through capacitor C 5 and capacitor C 6 ground connection, and the 7th termination is also through resistance R 14 connection control circuits; The 6th termination ground connection, the secondary coil of said high frequency transformer T1 is connection control circuit, linear power supply circuit and direct current input super capacitor respectively.
Described electric voltage feed forward compensating circuit includes resistance R 8, resistance R 9, resistance R 10, the resistance R 18 of series connection successively; The other end of described resistance R 8 connects the VDC voltage that dc bus provides; The other end ground connection of said resistance R 18; An also parallelly connected electric capacity on the said resistance R 18, the tie point of said resistance R 10 and resistance R 18 is connected control circuit.
Described RC absorbs circuit and includes the resistance R 6 and resistance R 7 that is connected; The other end of said resistance R 6 is connected the VDC voltage that dc bus provides jointly with an end of capacitor C 7, and the other end of the other end of said resistance R 7 and capacitor C 7 connects circuit of synchronous rectification through diode D8 and diode D7 successively.
The described first low tension switch power circuit includes switching power source chip U3; 1 pin of said switching power source chip U3 connects circuit of synchronous rectification; 3 pin and 5 pin connect the secondary output of the high frequency transformer T1 in the circuit of synchronous rectification, and 4 pin meet output interface J, and 2 pin connect inductance L 1 and diode D14 respectively; The other end of said inductance L 1 connects output interface J and capacitor C 2 respectively, the other end ground connection of said diode D14 and capacitor C 2.
Described linear power supply circuit includes the first pressurizer U4 and the second pressurizer U5; 1 pin of the described first pressurizer U4 is connected capacitor C 15, capacitor C A4, capacitor C 17 and capacitor C A6 jointly with 1 pin of the second pressurizer U5; 1 pin of the first pressurizer U4 connects capacitor C CA3, capacitor C 14, diode D2 and output interface J respectively; Another termination circuit of synchronous rectification of diode D2; 3 pin of the first pressurizer U4 connect the other end of output interface J, capacitor C 15 and the other end of capacitor C A4 respectively; 3 pin of the second pressurizer U5 connect the other end of output interface J, capacitor C 17 and the other end of capacitor C A6 respectively; 2 pin of the second pressurizer U5 connect capacitor C 16 respectively and connect circuit of synchronous rectification with capacitor C A5 and through diode D3, the corresponding other end that is connected capacitor C 14 and capacitor C CA3 of the other end of capacitor C 16 and capacitor C A5.
Described Voltage Feedback control circuit includes photoelectrical coupler ISO1; 1 pin of said photoelectrical coupler ISO1 connects control circuit, two pin ground connection, and 3 pin connect resistance R 24 and resistance R 23 respectively; 4 pin connect the other end, capacitor C 13 and the voltage stabilizing didoe U2 of resistance R 23 respectively; The other end ground connection of said voltage stabilizing didoe U2, another termination direct current input super capacitor of resistance R 24, the other end of capacitor C 13 connects resistance R 19, resistance R 20 and resistance R 22 respectively through resistance R 21; The other end direct current input super capacitor of said resistance R 19 and resistance R 20, the other end ground connection of resistance R 22.
Described output filter circuit includes capacitor C 3, capacitor C 4 and capacitor C A2; The end ground connection of described capacitor C 3, capacitor C 4 and capacitor C A2; The other end of capacitor C 3 connects an end of inductance L 3 respectively; And the first low tension switch power circuit, capacitor C 4 and the other end of capacitor C A2 are connected the other end of inductance L 3 respectively, and output interface J.
Described direct current input super capacitor comprises diode AD1, resistance AR1～resistance AR8 and super capacitor AC1～super capacitor AC6; The end of described diode AD1 connects the first low tension switch power circuit; The other end connects the end of resistance AR7 and resistance AR8; The other end of resistance AR7 and resistance AR8 is connected the end of resistance AR1, an end and the output interface J of super capacitor AC1 respectively; The other end of resistance AR1 and super capacitor AC1 is connected the end of resistance AR2 and super capacitor AC2; The other end of resistance AR2 and super capacitor AC2 is connected the end of resistance AR3 and super capacitor AC3, and the other end of resistance AR3 and super capacitor AC3 is connected the end of resistance AR4 and super capacitor AC4, and the other end of resistance AR4 and super capacitor AC4 is connected the end of resistance AR5 and super capacitor AC5; The other end of resistance AR5 and super capacitor AC5 is connected the end of resistance AR6 and super capacitor AC6, the other end ground connection of resistance AR6 and super capacitor AC6.
The described second low tension switch power circuit includes switching power source chip AU1; 1 pin of said switching power source chip AU1 connects direct current input super capacitor, and connects output interface J, 3 pin and 5 pin ground connection through diode AD5; 4 pin connect output interface J, diode AD2 and electric capacity AC7 respectively; 2 pin connect output interface J, diode AD2 and electric capacity AC7 respectively through inductance L 2, and 2 pin also pass through diode AD4 ground connection, the other end ground connection of described electric capacity AC7; The other end of diode AD2 is connected output interface J jointly with the end of diode AD3, and the other end of diode AD3 also connects output interface J.
The HVDC input quasi-resonance inverse-excitation type switch power-supply of the utility model, efficient is high, and cost is low, reduces the total power consumption of equipment to greatest extent.The utility model is through comprehensive Current Regulation pattern and degaussing measuring ability; Make power supply under any output loading, any linear input voltage condition, through postponing the switch turn-off time, it is minimum that the ESBT drain source voltage is reduced to; To guarantee its critical conduction mode; Carry out switch motion with minimum drain voltage, reduce spine and disturb, finally reach and reduce its loss purpose.The power supply resonant operational frequency will change with the variation of load and input voltage condition, to realize (ZVS) zero voltage switching function.Can realize ZVT, the quasi-resonance mode of operation, the high efficiency conversion is satisfied the desired low energy consumption of global range, High Power Factor, high efficiency, demand cheaply.
Description of drawings
Fig. 1 is the schematic block circuit diagram of the utility model HVDC input quasi-resonance inverse-excitation type switch power-supply;
Fig. 2 is the control circuit schematic diagram of the utility model HVDC input quasi-resonance inverse-excitation type switch power-supply;
Fig. 3 is the circuit of synchronous rectification schematic diagram of the utility model HVDC input quasi-resonance inverse-excitation type switch power-supply;
Fig. 4 is the electric voltage feed forward compensating circuit schematic diagram of the utility model HVDC input quasi-resonance inverse-excitation type switch power-supply;
Fig. 5 is that the RC of the utility model HVDC input quasi-resonance inverse-excitation type switch power-supply absorbs circuit theory diagrams;
Fig. 6 is the low tension switch power circuit principle figure of the utility model HVDC input quasi-resonance inverse-excitation type switch power-supply;
Fig. 7 is the linear power supply circuit theory diagrams of the utility model HVDC input quasi-resonance inverse-excitation type switch power-supply;
Fig. 8 is the Voltage Feedback control circuit schematic diagram of the utility model HVDC input quasi-resonance inverse-excitation type switch power-supply;
Fig. 9 is the output filter circuit schematic diagram of the utility model HVDC input quasi-resonance inverse-excitation type switch power-supply;
Figure 10 is the super capacitor circuit theory diagrams of the utility model HVDC input quasi-resonance inverse-excitation type switch power-supply;
Figure 11 is the second switch power circuit principle figure of the utility model HVDC input quasi-resonance inverse-excitation type switch power-supply.
Among the figure:
1: control circuit 2: circuit of synchronous rectification
3: electric voltage feed forward compensating circuit 4:RC absorbs circuit
5: the first low tension switch power circuits 6: linear power supply circuit
7: Voltage Feedback control circuit 8: output filter circuit
9: 10: the second low tension switch power circuits of direct current input super capacitor
Embodiment
Below in conjunction with embodiment and accompanying drawing the HVDC input quasi-resonance inverse-excitation type switch power-supply of the utility model is made detailed description.
As shown in Figure 1; The HVDC of the utility model input quasi-resonance inverse-excitation type switch power-supply comprises: through resistance R 1, R2, R3, R4 the control circuit 1 of power supply, the circuit of synchronous rectification 2 that links to each other with control circuit 1 respectively are provided by DC bus-bar voltage VDC; Electric voltage feed forward compensating circuit 3 and Voltage Feedback control circuit 7; Described circuit of synchronous rectification 2 also connects RC respectively and absorbs circuit 4, the first low tension switch power circuits 5 and linear power supply circuit 6, and the described first low tension switch power circuit 5 also connects output filter circuit 8; Also be provided with the stand-by power supply circuit; Be that wherein, direct current input super capacitor 9 connects circuit of synchronous rectification 2 and Voltage Feedback control circuit 7 respectively by direct current input super capacitor 9 and the second low tension switch power circuit 10 that links to each other with direct current input super capacitor 9.
As shown in Figure 2, described control circuit 1 includes the control chip U1 that model is L6565,1 pin of said control chip U1 and 6 pin ground connection; 3 pin connect electric voltage feed forward compensating circuit 3; 4 pin, 7 pin and 5 pin connect circuit of synchronous rectification 2,8 pin and meet power supply VCC, and 2 pin connect Voltage Feedback control circuit 7.Control chip U1 adopts active clamped ZVT and quasi-resonance technology, and circuit is under the quasi-resonance pattern and moves, and the loss of power switch pipe is little, and the voltage stress that switching circuit bore can be accomplished maximum, and power output also can arrive maximum.Circuit has overcurrent, overvoltage, and functions such as short-circuit protection, efficient is high, and safety is reliable, and circuit adopts input voltage feed forward control, and its power output is permanent power output basically like this.When dc bus VDC provides control chip U1 operating voltage VCC (13.5V) through resistance R 1, R2, R3, R4, the work of control chip L6565 built-in starting circuit.L6565 stops power capacity sharply to change with input voltage by a circuit feed forward function. and at L6565N pin 2 is to utilize TL431 and optical coupler to form the feedback control loop from secondary to primary side; With output voltage fluctuation signal sampling and be fed to the converter primary side, as the control loop compensation.The current sense input compares with the output of line voltage distribution feed forward circuit on the L6565 pin 4, determines the precise time when outside MOSFET turn-offs.
As shown in Figure 3; Described circuit of synchronous rectification 2 comprises emitter-base bandgap grading switching bipolar transistor Q1; Anti-violent change depressor T2; High frequency transformer T1, the C utmost point of said emitter-base bandgap grading switching bipolar transistor Q1 connects the elementary winding of anti-violent change depressor T2, another termination DC high-voltage power supply of this elementary winding; The B utmost point of said emitter-base bandgap grading switching bipolar transistor Q1 connects an end of anti-violent change depressor T2 secondary coil, an end of resistance R 11 and an end of resistance R 16 respectively; The other end of anti-violent change depressor T2 secondary coil is through diode D10 respectively an end, the other end of resistance R 11, an end of capacitor C 8 and the end of voltage stabilizing didoe D9 of connecting resistance R13, and an end of said capacitor C 8 and the other end of voltage stabilizing didoe D9 are connected an end of resistance R 16, resistance R 17 and resistance R 15, the other end ground connection of resistance R 17 respectively; The other end connection control circuit 1 of resistance R 15; The G utmost point of said emitter-base bandgap grading switching bipolar transistor Q1 connects diode D11 and control circuit 1 respectively through resistance R 12, the other end of the other end connecting resistance R13 of diode D11, and the E utmost point of said emitter-base bandgap grading switching bipolar transistor Q1 is through resistance R 17 ground connection; The 1st, 5 terminations of the primary coil of said high frequency transformer T1 connect and directly connect DC high-voltage power supply; The 7th termination connects DC high-voltage power supply through diode D6 and resistance R 5 successively, and said resistance R 5 is also respectively through capacitor C 5 and capacitor C 6 ground connection, and the 7th termination is also through resistance R 14 connection control circuits 1; The 6th termination ground connection, the secondary coil of said high frequency transformer T1 is connection control circuit 1, linear power supply circuit 6 and direct current input super capacitor 9 respectively.
Control chip U1 during starts forces driver to provide the grid G that a pulse is applied to emitter-base bandgap grading switching bipolar transistor Q1, and when the G utmost point is applied in high level, NMOS will conducting; This moment, the BJT emitter voltage was 0; Base stage B electric current is that forward flows to emitter-base bandgap grading E from base stage B, and electric current is 3V/Rb, the BJT saturation conduction; Then the pressure drop of whole ESBT is the BJT pressure drop basically, the homogeneous tube conducting.
When the G utmost point becomes low level from high level, the metal-oxide-semiconductor switching speed is fast, in the very first time, turn-offs, and emitter current moment drops to 0.This moment, base stage was because of connecing voltage source; Voltage when still keeping conducting (about 0.7V); So the PN junction electric current between base-emitter-base bandgap grading drops to 0, collector electrode--the electric current the between-emitter-base bandgap grading is not because minority carrier storage effect also is reduced to 0, and these electric currents oppositely flow out through base stage; Form a reverse spike of base current, irritate the base bias power supply.
As shown in Figure 4; Described electric voltage feed forward compensating circuit 3 includes resistance R 8, resistance R 9, resistance R 10, the resistance R 18 of series connection successively; The other end of described resistance R 8 connects the VDC voltage that dc bus provides; The other end ground connection of said resistance R 18, an also parallelly connected capacitor C 12 on the said resistance R 18, the tie point of said resistance R 10 and resistance R 18 is connected control circuit 1.Provide VDC voltage through resistance R 8, resistance R 9, resistance R 10, resistance R 18 and the capacitor C 12 parallelly connected control chip U1 precompensation voltages that provide by dc bus.In order to stop power capacity sharply to change with input voltage.
As shown in Figure 5; Described RC absorbs circuit 4 and includes the resistance R 6 and resistance R 7 that is connected; The other end of said resistance R 6 is connected the VDC voltage that dc bus provides jointly with an end of capacitor C 7, and the other end of the other end of said resistance R 7 and capacitor C 7 connects circuit of synchronous rectification 2 through diode D8 and diode D7 successively.Utilize resistance, electric capacity and blocking diode composition clamp circuit (absorption circuit) effectively protection switch power tube ESBT are not damaged.
As shown in Figure 6; The described first low tension switch power circuit 5 includes the switching power source chip U3 that model is LM2575-5, and 1 pin of said switching power source chip U3 connects the secondary output that circuit of synchronous rectification 2,3 pin and 5 pin meet the high frequency transformer T1 in the circuit of synchronous rectification 2; 4 pin meet output interface J; 2 pin connect inductance L 1 and diode D14 respectively, and the other end of said inductance L 1 connects output interface J and capacitor C 2 respectively, the other end ground connection of said diode D14 and capacitor C 2.
As shown in Figure 7, described linear power supply circuit 6 is by Schottky rectifier diode D2, D3, and through linear three terminal regulator U4, U5, High frequency filter dc capacitor, output P15, N15 voltage.Specifically including model is the first pressurizer U4 of LM7815 and the second pressurizer U5 that model is LM7915; 1 pin of the described first pressurizer U4 is connected capacitor C 15, capacitor C A4, capacitor C 17 and capacitor C A6 jointly with 1 pin of the second pressurizer U5; 1 pin of the first pressurizer U4 connects capacitor C CA3, capacitor C 14, diode D2 and output interface J respectively; Another termination circuit of synchronous rectification 2 of diode D2; 3 pin of the first pressurizer U4 connect the other end of output interface J, capacitor C 15 and the other end of capacitor C A4 respectively; 3 pin of the second pressurizer U5 connect the other end of output interface J, capacitor C 17 and the other end of capacitor C A6 respectively; 2 pin of the second pressurizer U5 connect capacitor C 16 respectively and connect circuit of synchronous rectification 2 with capacitor C A5 and through diode D3, the corresponding other end that is connected capacitor C 14 and capacitor C CA3 of the other end of capacitor C 16 and capacitor C A5.
As shown in Figure 8, described Voltage Feedback control circuit 7 includes the photoelectrical coupler ISO1 that model is PC817, and 1 pin of said photoelectrical coupler ISO1 connects control circuit 1; Two pin ground connection; It is the voltage stabilizing didoe U2 of TL431 with the other end, capacitor C 13 and the model that resistance R 23,4 pin connect resistance R 23 respectively that 3 pin connect resistance R 24 respectively, the other end ground connection of said voltage stabilizing didoe U2; Another termination direct current input super capacitor 9 of resistance R 24; The other end of capacitor C 13 connects resistance R 19, resistance R 20 and resistance R 22 respectively through resistance R 21, the other end direct current input super capacitor 9 of said resistance R 19 and resistance R 20, the other end ground connection of resistance R 22.When through sampling output voltage P11 fluctuation taking place, through divider resistance R19, R20; R22 obtain sampling voltage just with voltage stabilizing didoe U2 in the 2.5V reference voltage compare; On negative electrode, form error voltage, the operating current of photoelectrical coupler ISO1 light-emitting diode is changed, pass through the size of the COMP control end electric current of photoelectrical coupler ISO1 again; With output voltage fluctuation signal sampling and be fed to the converter primary side, reach the output voltage stabilization effect.
As shown in Figure 9; Described output filter circuit 8 includes capacitor C 3, capacitor C 4 and capacitor C A2; The end ground connection of described capacitor C 3, capacitor C 4 and capacitor C A2, the other end of capacitor C 3 connects an end of inductance L 3 respectively, and the first low tension switch power circuit 5; Capacitor C 4 and the other end of capacitor C A2 are connected the other end of inductance L 3 respectively, and output interface J.Hold C3, C4 and inductance L 3 inductance by high-frequency DC and constitute pi type filter.Output filter circuit will be exported 5V voltage and constitute the switching noise that pi type filter has filtered out 200mv through high-frequency DC appearance and inductance.
Shown in figure 10; Described direct current input super capacitor 9 comprises Schottky diode AD1, resistance AR1～resistance AR8 and super capacitor AC1～super capacitor AC6; The end of described diode AD1 connects the first low tension switch power circuit 5; The other end connects the end of resistance AR7 and resistance AR8; The other end of resistance AR7 and resistance AR8 is connected the end of resistance AR1, an end and the output interface J of super capacitor AC1 respectively, and the other end of resistance AR1 and super capacitor AC1 is connected the end of resistance AR2 and super capacitor AC2, and the other end of resistance AR2 and super capacitor AC2 is connected the end of resistance AR3 and super capacitor AC3; The other end of resistance AR3 and super capacitor AC3 is connected the end of resistance AR4 and super capacitor AC4; The other end of resistance AR4 and super capacitor AC4 is connected the end of resistance AR5 and super capacitor AC5, and the other end of resistance AR5 and super capacitor AC5 is connected the end of resistance AR6 and super capacitor AC6, the other end ground connection of resistance AR6 and super capacitor AC6.
Schottky diode AD1 rectification provides the super capacitor charging current and the second low tension switch power circuit 10 to constitute the stand-by power supply circuit through current-limiting resistance AR7 and resistance AR8.Being the 11V direct voltage charges to super capacitor through Schottky diode AD1 rectification and current-limiting resistance AR7 and resistance AR8, when mains power failure and the second low tension switch power circuit 10 constitute the stand-by power supply that stand-by power supplies provide equipment 20S.
Shown in figure 11; The described second low tension switch power circuit 10 includes the switching power source chip AU1 that model is LM2575T-5.0; 1 pin of said switching power source chip AU1 connects direct current input super capacitor 9, and connects output interface J, 3 pin and 5 pin ground connection through diode AD5; 4 pin connect output interface J, diode AD2 and electric capacity AC7 respectively; 2 pin connect output interface J, diode AD2 and electric capacity AC7 respectively through inductance L 2, and 2 pin also pass through diode AD4 ground connection, the other end ground connection of described electric capacity AC7; The other end of diode AD2 is connected output interface J jointly with the end of diode AD3, and the other end of diode AD3 also connects output interface J.The second low tension switch power circuit 10 is output 5V direct voltage with 11V direct voltage rectifying and wave-filtering.
Claims (10)
1. a HVDC is imported the quasi-resonance inverse-excitation type switch power-supply; It is characterized in that, comprising: control circuit (1), the circuit of synchronous rectification (2) that links to each other with control circuit (1) respectively; Electric voltage feed forward compensating circuit (3) and Voltage Feedback control circuit (7); Described circuit of synchronous rectification (2) also connects RC respectively and absorbs circuit (4), the first low tension switch power circuit (5) and linear power supply circuit (6), and the described first low tension switch power circuit (5) also connects output filter circuit (8); Also be provided with the stand-by power supply circuit; Be that wherein, direct current input super capacitor (9) connects circuit of synchronous rectification (2) and Voltage Feedback control circuit (7) respectively by direct current input super capacitor (9) and the second low tension switch power circuit (10) that links to each other with direct current input super capacitor (9).
2. HVDC input quasi-resonance inverse-excitation type switch power-supply according to claim 1; It is characterized in that; Described circuit of synchronous rectification (2) comprises emitter-base bandgap grading switching bipolar transistor Q1, anti-violent change depressor T2, high frequency transformer T1; The C utmost point of said emitter-base bandgap grading switching bipolar transistor Q1 connects the elementary winding of anti-violent change depressor T2; Another termination DC high-voltage power supply of this elementary winding, the B utmost point of said emitter-base bandgap grading switching bipolar transistor Q1 connect an end of anti-violent change depressor T2 secondary coil, an end of resistance R 11 and an end of resistance R 16 respectively, and the other end of anti-violent change depressor T2 secondary coil is through an end, the other end of resistance R 11, an end of capacitor C 8 and the end of voltage stabilizing didoe D9 of diode D10 difference connecting resistance R13; One end of said capacitor C 8 and the other end of voltage stabilizing didoe D9 are connected an end of resistance R 16, resistance R 17 and resistance R 15 respectively; The other end ground connection of resistance R 17, the other end connection control circuit (1) of resistance R 15, the G utmost point of said emitter-base bandgap grading switching bipolar transistor Q1 connects diode D11 and control circuit (1) respectively through resistance R 12; The other end of the other end connecting resistance R13 of diode D11; The E utmost point of said emitter-base bandgap grading switching bipolar transistor Q1 is through resistance R 17 ground connection, and the 1st, 5 terminations of the primary coil of said high frequency transformer T1 connect and directly connect DC high-voltage power supply, and the 7th termination connects DC high-voltage power supply through diode D6 and resistance R 5 successively; Said resistance R 5 is also respectively through capacitor C 5 and capacitor C 6 ground connection; Resistance R 14 connection control circuits (1) are also passed through in the 7th termination, the 6th termination ground connection, and the secondary coil of said high frequency transformer T1 is connection control circuit (1), linear power supply circuit (6) and direct current input super capacitor (9) respectively.
3. HVDC input quasi-resonance inverse-excitation type switch power-supply according to claim 1; It is characterized in that; Described electric voltage feed forward compensating circuit (3) includes resistance R 8, resistance R 9, resistance R 10, the resistance R 18 of series connection successively, and the other end of described resistance R 8 connects the VDC voltage that dc bus provides, the other end ground connection of said resistance R 18; An also parallelly connected electric capacity on the said resistance R 18, the tie point of said resistance R 10 and resistance R 18 is connected control circuit (1).
4. HVDC input quasi-resonance inverse-excitation type switch power-supply according to claim 1; It is characterized in that; Described RC absorbs circuit (4) and includes the resistance R 6 and resistance R 7 that is connected; The other end of said resistance R 6 is connected the VDC voltage that dc bus provides jointly with an end of capacitor C 7, and the other end of the other end of said resistance R 7 and capacitor C 7 connects circuit of synchronous rectification (2) through diode D8 and diode D7 successively.
5. HVDC input quasi-resonance inverse-excitation type switch power-supply according to claim 1; It is characterized in that; The described first low tension switch power circuit (5) includes switching power source chip U3, and 1 pin of said switching power source chip U3 connects circuit of synchronous rectification (2), and 3 pin and 5 pin connect the secondary output of the high frequency transformer T1 in the circuit of synchronous rectification (2); 4 pin meet output interface J; 2 pin connect inductance L 1 and diode D14 respectively, and the other end of said inductance L 1 connects output interface J and capacitor C 2 respectively, the other end ground connection of said diode D14 and capacitor C 2.
6. HVDC input quasi-resonance inverse-excitation type switch power-supply according to claim 1; It is characterized in that; Described linear power supply circuit (6) includes the first pressurizer U4 and the second pressurizer U5; 1 pin of the described first pressurizer U4 is connected capacitor C 15, capacitor C A4, capacitor C 17 and capacitor C A6 jointly with 1 pin of the second pressurizer U5; 1 pin of the first pressurizer U4 connects capacitor C CA3, capacitor C 14, diode D2 and output interface J respectively; Another termination circuit of synchronous rectification (2) of diode D2,3 pin of the first pressurizer U4 connect the other end of output interface J, capacitor C 15 and the other end of capacitor C A4 respectively, and 3 pin of the second pressurizer U5 connect the other end of output interface J, capacitor C 17 and the other end of capacitor C A6 respectively; 2 pin of the second pressurizer U5 connect capacitor C 16 respectively and connect circuit of synchronous rectification (2) with capacitor C A5 and through diode D3, the corresponding other end that is connected capacitor C 14 and capacitor C CA3 of the other end of capacitor C 16 and capacitor C A5.
7. HVDC input quasi-resonance inverse-excitation type switch power-supply according to claim 1; It is characterized in that described Voltage Feedback control circuit (7) includes photoelectrical coupler ISO1,1 pin of said photoelectrical coupler ISO1 connects control circuit (1); Two pin ground connection; 3 pin connect the other end, capacitor C 13 and the voltage stabilizing didoe U2 that resistance R 24 and resistance R 23,4 pin connect resistance R 23 respectively, the other end ground connection of said voltage stabilizing didoe U2 respectively; Another termination direct current input super capacitor (9) of resistance R 24; The other end of capacitor C 13 connects resistance R 19, resistance R 20 and resistance R 22 respectively through resistance R 21, the other end direct current input super capacitor (9) of said resistance R 19 and resistance R 20, the other end ground connection of resistance R 22.
8. HVDC input quasi-resonance inverse-excitation type switch power-supply according to claim 1; It is characterized in that described output filter circuit (8) includes capacitor C 3, capacitor C 4 and capacitor C A2, the end ground connection of described capacitor C 3, capacitor C 4 and capacitor C A2; The other end of capacitor C 3 connects an end of inductance L 3 respectively; And the first low tension switch power circuit (5), capacitor C 4 and the other end of capacitor C A2 are connected the other end of inductance L 3 respectively, and output interface J.
9. HVDC input quasi-resonance inverse-excitation type switch power-supply according to claim 1; It is characterized in that; Described direct current input super capacitor (9) comprises diode AD1, resistance AR1～resistance AR8 and super capacitor AC1～super capacitor AC6; The end of described diode AD1 connects the first low tension switch power circuit (5); The other end connects the end of resistance AR7 and resistance AR8; The other end of resistance AR7 and resistance AR8 is connected the end of resistance AR1, an end and the output interface J of super capacitor AC1 respectively, and the other end of resistance AR1 and super capacitor AC1 is connected the end of resistance AR2 and super capacitor AC2, and the other end of resistance AR2 and super capacitor AC2 is connected the end of resistance AR3 and super capacitor AC3; The other end of resistance AR3 and super capacitor AC3 is connected the end of resistance AR4 and super capacitor AC4; The other end of resistance AR4 and super capacitor AC4 is connected the end of resistance AR5 and super capacitor AC5, and the other end of resistance AR5 and super capacitor AC5 is connected the end of resistance AR6 and super capacitor AC6, the other end ground connection of resistance AR6 and super capacitor AC6.
10. HVDC input quasi-resonance inverse-excitation type switch power-supply according to claim 1; It is characterized in that the described second low tension switch power circuit (10) includes switching power source chip AU1,1 pin of said switching power source chip AU1 connects direct current input super capacitor (9); And through diode AD5 connection output interface J; 3 pin and 5 pin ground connection, 4 pin connect output interface J, diode AD2 and electric capacity AC7 respectively, and 2 pin connect output interface J, diode AD2 and electric capacity AC7 respectively through inductance L 2; 2 pin are also through diode AD4 ground connection; The other end ground connection of described electric capacity AC7, the other end of diode AD2 is connected output interface J jointly with the end of diode AD3, and the other end of diode AD3 also connects output interface J.
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| CN2012200568497U CN202475263U (en) | 2012-02-21 | 2012-02-21 | High-voltage direct-current input quasi-resonance flyback switching power supply |
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| CN2012200568497U CN202475263U (en) | 2012-02-21 | 2012-02-21 | High-voltage direct-current input quasi-resonance flyback switching power supply |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10090766B2 (en) | 2015-11-11 | 2018-10-02 | Halliburton Energy Services, Inc. | Reusing electromagnetic energy from a voltage converter downhole |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10090766B2 (en) | 2015-11-11 | 2018-10-02 | Halliburton Energy Services, Inc. | Reusing electromagnetic energy from a voltage converter downhole |
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