CN100511949C - Capacitance decompression AC-DC switch power source - Google Patents
Capacitance decompression AC-DC switch power source Download PDFInfo
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- CN100511949C CN100511949C CNB2007101563136A CN200710156313A CN100511949C CN 100511949 C CN100511949 C CN 100511949C CN B2007101563136 A CNB2007101563136 A CN B2007101563136A CN 200710156313 A CN200710156313 A CN 200710156313A CN 100511949 C CN100511949 C CN 100511949C
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- dividing potential
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Abstract
The utility model relates to a capacitor depressurizing AC-DC switch power supply, comprising four rectifying diodes(D1, D2, D3 and D4), a first voltage distributing capacitor(C1), a second voltage distributing capacitor(C2), a third voltage distributing capacitor(C3), a fourth voltage distributing capacitor(C4), a controller(1), a first isolated diode(D6), a second isolated diode(D8), a first grounding diode(D5), a second grounding diode(D7), a first discharging switch tube(Q1) and a second discharging switch tube(Q2). The four voltage distributing capacitors are divided into two units, and each unit enters into the negative half circle after being charged in the positive half circle and each unit is controlled through the controller and is connected with the grounding diode and the discharging switch tube. The two units are connected in parallel with each other to discharge on load, so that the power on each voltage distributing capacitor can be fully used and the power supply can supply relative large DC output current. Besides, the utility model also has the function of on-line natural isolation.
Description
Technical field
The present invention relates to a kind of alternating current is transformed into the structure of galvanic power supply, a kind of capacitance decompression AC-DC Switching Power Supply.
Background technology
In step down switching regulator, often transmit energy with the inductive energy storage step-down, step-down decides with switch transformer turn ratio and pulse duration.Chinese patent 200620014628.8 has been introduced a kind of resistance capacitance voltage-dropping power supply circuit, this circuit comprises the three terminal device of half-wave rectifying circuit, first storage capacitor, second storage capacitor and control charge circuit, the electric energy that utilizes positive half cycle to store continues as DC power supply at negative half period, can obtain than conventional resistance capacitance voltage dropping power supply to Duo one times power supply capacity.Sort circuit only is applicable to half-wave rectifying circuit, and the wave distortion of AC power end is bigger, and dc output end and ac input end are not isolated.
Summary of the invention
The present invention is intended to propose a kind of circuit of capacitance decompression AC-DC Switching Power Supply of full-wave rectification, can make full use of the electric energy that dividing potential drop electric capacity stores in charge cycle.
This capacitance decompression AC-DC Switching Power Supply comprises first rectifier diode, second rectifier diode, the 3rd rectifier diode, the 4th rectifier diode, the first dividing potential drop electric capacity, the second dividing potential drop electric capacity, the 3rd dividing potential drop electric capacity, the 4th dividing potential drop electric capacity, the first tap changer pipe, the second tap changer pipe, output diode, output capacitance, inductance and controller.The parameter of the first dividing potential drop electric capacity, the second dividing potential drop electric capacity, the 3rd dividing potential drop electric capacity and the 4th dividing potential drop electric capacity is all identical, and four dividing potential drop electric capacity are divided into two groups, and the first dividing potential drop electric capacity and the second dividing potential drop electric capacity are one group, and the 3rd dividing potential drop electric capacity and the 4th dividing potential drop electric capacity are another group.The positive pole of the positive pole of the 3rd rectifier diode and the 4th rectifier diode joins, and this contact and power-output join, and the negative pole of the 3rd rectifier diode and the first AC power end join, and the negative pole of the 4th rectifier diode and the second AC power end join.The positive pole of first rectifier diode and the first AC power end join; Receive after the second dividing potential drop electric capacity and the first dividing potential drop electric capacity are in series between the negative pole and power-output of first rectifier diode, wherein the positive pole of the second dividing potential drop electric capacity connects the negative pole of first rectifier diode, and the negative pole of the first dividing potential drop electric capacity connects the negative output terminal of power supply.The positive pole of second rectifier diode and the second AC power end join; Receive between the negative pole and power-output of rectifier diode after the 4th dividing potential drop electric capacity and the 3rd dividing potential drop electric capacity are in series, wherein the positive pole of the 4th dividing potential drop electric capacity connects the negative pole of second rectifier diode, and the negative pole of the 3rd dividing potential drop electric capacity connects the negative output terminal of power supply.One end of inductance and the positive output end of power supply join, and the other end of inductance and the negative pole of output diode join, and the positive pole of output diode and the negative output terminal of power supply join, and output capacitance is connected between the positive output end and negative output terminal of power supply.The first tap changer pipe is connected between the negative pole of the positive pole of the first dividing potential drop electric capacity and output diode, and the first switching signal output of the control utmost point of the first tap changer pipe and controller joins.The second tap changer pipe is connected between the negative pole of the positive pole of the 3rd dividing potential drop electric capacity and output diode, and the control utmost point of the second tap changer pipe and the second switch signal output part of controller join.This capacitance decompression AC-DC Switching Power Supply also comprises first isolating diode, second isolating diode, the first ground connection diode, the second ground connection diode, the first discharge switch pipe and the second discharge switch pipe.First isolating diode is connected between the first dividing potential drop electric capacity and the second dividing potential drop electric capacity, and wherein the negative pole of the positive pole of first isolating diode and the second dividing potential drop electric capacity joins, and the positive pole of its negative pole and the first dividing potential drop electric capacity joins; The positive pole of the first ground connection diode and the negative output terminal of power supply join, and the negative pole of the negative pole of the first ground connection diode and the second dividing potential drop electric capacity joins; The first discharge switch pipe is connected between the positive pole of the positive pole of the first dividing potential drop electric capacity and the second dividing potential drop electric capacity, and the first discharge switch signal output part of the control utmost point of the first discharge switch pipe and controller joins.Second isolating diode is connected between the 3rd dividing potential drop electric capacity and the 4th dividing potential drop electric capacity, and wherein the negative pole of the positive pole of second isolating diode and the 4th dividing potential drop electric capacity joins, and the positive pole of its negative pole and the 3rd dividing potential drop electric capacity joins.The positive pole of the second ground connection diode and the negative output terminal of power supply join, the negative pole of the negative pole of the second ground connection diode and the 4th dividing potential drop electric capacity joins, the second discharge switch pipe is connected between the positive pole of the positive pole of the 3rd dividing potential drop electric capacity and the 4th dividing potential drop electric capacity, and the second discharge switch signal output part of the control utmost point of the second discharge switch pipe and controller joins.
Every component piezoelectricity in the sort circuit holds after positive half cycle charging, when entering negative half period, control by controller, by being connected of ground connection diode and discharge switch pipe, make the dividing potential drop electric capacity of this group in parallel mutually, jointly to load discharge, electric energy on each dividing potential drop electric capacity is fully used, and make power supply that bigger average anode current can be provided, also played the online effect of isolating naturally, two component piezoelectricity hold alternately charging in the positive-negative half-cycle of AC power, discharge, concerning power supply, belong to full-wave rectification, near the bridge rectifier state, less to the waveform influence of AC power.
Description of drawings
Accompanying drawing 1 is the basic block diagram of this capacitance decompression AC-DC Switching Power Supply;
Accompanying drawing 2 is second kind of structure chart of capacitance decompression AC-DC Switching Power Supply.
Embodiment
As shown in Figure 1, this capacitance decompression AC-DC Switching Power Supply comprises the first rectifier diode D1, the second rectifier diode D2, the 3rd rectifier diode D3, the 4th rectifier diode D4, the first dividing potential drop capacitor C 1, the second dividing potential drop capacitor C 2, the 3rd dividing potential drop capacitor C 3, the 4th dividing potential drop capacitor C 4, the first tap changer pipe Q4, the second tap changer pipe Q3, output diode D9, output capacitance C5, inductance L 1 and controller 1.The parameter of the first dividing potential drop electric capacity, the second dividing potential drop electric capacity, the 3rd dividing potential drop electric capacity and the 4th dividing potential drop electric capacity is all identical, and four dividing potential drop electric capacity are divided into two groups, and the first dividing potential drop electric capacity and the second dividing potential drop electric capacity are one group, and the 3rd dividing potential drop electric capacity and the 4th dividing potential drop electric capacity are another group.The positive pole of the positive pole of the 3rd rectifier diode D3 and the 4th rectifier diode D4 joins, this contact and power-output 3 join, the negative pole of the 3rd rectifier diode D3 and the first AC power end L join, and the negative pole of the 4th rectifier diode D4 and the second AC power end N join; The positive pole of the first rectifier diode D1 and the first AC power end L join; After being in series, the second dividing potential drop capacitor C 2 and the first dividing potential drop capacitor C 1 receive between the negative pole and power-output 3 of the first rectifier diode D1, wherein the positive pole of the second dividing potential drop capacitor C 2 connects the negative pole of first rectifier diode, and the negative pole of the first dividing potential drop capacitor C 1 connects the negative output terminal 3 of power supply.The positive pole of the second rectifier diode D2 and the second AC power end N join; After being in series, the 4th dividing potential drop capacitor C 4 and the 3rd dividing potential drop capacitor C 3 receive between the negative pole and power-output 3 of the second rectifier diode D2, wherein the positive pole of the 4th dividing potential drop capacitor C 4 connects the negative pole of the second rectifier diode D2, and the negative pole of the 3rd dividing potential drop capacitor C 3 connects the negative output terminal 3 of power supply.One end of inductance L 1 and the positive output end 2 of power supply join, and the negative pole of the other end of inductance L 1 and output diode D9 joins; The positive pole of output diode and the negative output terminal of power supply join, and output capacitance C5 is connected between the positive output end and negative output terminal of power supply.The first tap changer pipe Q4 is connected between the negative pole of the positive pole of the first dividing potential drop capacitor C 1 and output diode D9, the first switching signal output of the control utmost point of the first tap changer pipe Q4 and controller 1 joins, the second tap changer pipe Q3 is connected between the negative pole of the positive pole of the 3rd dividing potential drop capacitor C 3 and output diode D9, and the control utmost point of the second tap changer pipe Q3 and the second switch signal output part of controller 1 join.This capacitance decompression AC-DC Switching Power Supply also comprises the first isolating diode D6, the second isolating diode D8, the first ground connection diode D5, the second ground connection diode D7, the first discharge switch pipe Q1 and the second discharge switch pipe Q2.The first isolating diode D6 is connected between the first dividing potential drop capacitor C 1 and the second dividing potential drop capacitor C 2, and wherein the negative pole of the positive pole of first isolating diode and the second dividing potential drop capacitor C 2 joins, and the positive pole of the negative pole of first isolating diode and the first dividing potential drop capacitor C 1 joins.The positive pole of the first ground connection diode D5 and the negative output terminal of power supply join, the negative pole of the negative pole of the first ground connection diode and the second dividing potential drop capacitor C 2 joins, the first discharge switch pipe Q1 is connected between the positive pole of the positive pole of the first dividing potential drop electric capacity and the second dividing potential drop electric capacity, and the first discharge switch signal output part of the control utmost point of the first discharge switch pipe and controller 1 joins.The second isolating diode D8 is connected between the 3rd dividing potential drop electric capacity and the 4th dividing potential drop electric capacity, and wherein the negative pole of the positive pole of second isolating diode and the 4th dividing potential drop capacitor C 4 joins, and the positive pole of the negative pole of second isolating diode and the 3rd dividing potential drop capacitor C 3 joins.The positive pole of the second ground connection diode D7 and the negative output terminal of power supply join, the negative pole of the negative pole of the second ground connection diode and the 4th dividing potential drop electric capacity joins, the second discharge switch pipe Q2 is connected between the positive pole of the positive pole of the 3rd dividing potential drop electric capacity and the 4th dividing potential drop electric capacity, and the second discharge switch signal output part of the control utmost point of the second discharge switch pipe and controller 1 joins.
The course of work of this capacitance decompression AC-DC Switching Power Supply is as follows: as shown in Figure 1, (1) when the L of alternating current end for just, the N end when negative, D1 and D4 conducting, AC power is charged to C1 and C2 by D1, D6, D4; (2) transfer to negative when alternating current L end, the N end is timing, D1 and D4 end, controller 1 is sent signal simultaneously, makes the Q1 conducting, and the anode of C1 and C2 is connected, controller is sent PWM (pulse width modulation) control signal more then, make Q4 work, make C1 and C2 parallel connection provide electric energy by L1 to load RL, this moment, the negative pole of C2 formed discharge path by D5 and power-output 3; On the other hand, D2 and D3 conducting, AC power is charged to C3 and C4 by D2, D8, D3; (3) when alternating current L end for just, when the N end is negative, D2 and D3 end, this moment, controller 1 was sent signal, make the Q2 conducting, the anode of C3 and C4 is connected, and the negative pole of C4 forms discharge path by D7 and power-output 3, controller is sent pwm control signal again and is made Q3 work then, and C3 and C4 parallel connection provide electric energy by L1 to load RL; On the other hand, Q1, Q4 end, D1 and D4 conducting, and AC power is charged to C1 and C2 by D1, D6, D4.So circulation provides direct current energy to load RL.Q3, Q4, D9, C5 and L1 form the tandem type Switching Power Supply, change the pulse duration that controller 1 transfers to the pwm control signal of Q3, Q4, can regulate the output voltage values of this Switching Power Supply.For circuit shown in Figure 1, if the voltage of AC power is 220 volts, then the crest voltage of Jiao Liuing is 310 volts, after D1, D2, D3, D4 rectification, be added to two component piezoelectricity and hold, the voltage on each dividing potential drop electric capacity be about 310 volts 1/2, be about 155 volts, therefore rely on the control of controller 1, the exportable any voltage that is lower than 140 volts of this capacitance decompression AC-DC Switching Power Supply.
As shown in Figure 2, it (is every group of three dividing potential drop electric capacity: C1 among Fig. 2 that every component piezoelectricity appearance in this capacitance decompression AC-DC Switching Power Supply also can have more than three, C2, C6 and C3, C4, C7), the parameter of each dividing potential drop electric capacity is all identical, every group dividing potential drop electric capacity is in series, isolating diode of serial connection (is D6 among the figure between per two dividing potential drop electric capacity, D11 and D8, D13), the positive pole of each isolating diode (is D5 among the figure by a ground connection diode, D10 and D7, D12) negative output terminal 3 with power supply joins, in every group the dividing potential drop electric capacity, dividing potential drop capacitor C 1 bottom, the positive pole of C3 (is Q1 among the figure by a discharge switch pipe separately, Q5 and Q2, Q6) positive pole with remaining each dividing potential drop electric capacity joins, and the corresponding discharge switch signal output part of the control utmost point of each discharge switch pipe and controller 1 joins.If every group dividing potential drop electric capacity is n, when positive half cycle, the voltage that obtains on each dividing potential drop electric capacity is 310 volts/n.Dividing potential drop electric capacity number is many more, and the voltage on each dividing potential drop electric capacity can be low more, can reduce the requirement to dividing potential drop electric capacity voltage withstand class, and more a plurality of dividing potential drop electric capacity parallel discharges is arranged during negative half period, and bigger average anode current can be provided.
Among the present invention used controller can be one by single-chip microcomputer (model for example: be the main control module of forming C8051F330), wherein comprise for example UC3842 of PWM chip commonly used, Single-chip Controlling PWM chip produces one group of signal.For just, when the N end is negative, control Q1, Q5 conducting at alternating current L end, produce pwm signal control Q4 work simultaneously, provide power to export to load, Q2, Q6 and Q3 are in off state; For just, when the L end is negative, then control Q2, Q6 and Q3 conducting at alternating current N end, make Q1 simultaneously, Q5, Q4 are in off state.Used tap changer pipe Q3, Q4 and discharge switch pipe Q1, Q2, Q5, Q6 all can adopt field effect transistor.
Claims (2)
1, a kind of capacitance decompression AC-DC switch power source comprises first rectifier diode (D1), second rectifier diode (D2), the 3rd rectifier diode (D3), the 4th rectifier diode (D4), the first dividing potential drop electric capacity (C1), the second dividing potential drop electric capacity (C2), the 3rd dividing potential drop electric capacity (C3), the 4th dividing potential drop electric capacity (C4), the first tap changer pipe (Q4), the second tap changer pipe (Q3), output diode (D9), output capacitance (C5), inductance (L1) and controller (1); The parameter of the first dividing potential drop electric capacity, the second dividing potential drop electric capacity, the 3rd dividing potential drop electric capacity and the 4th dividing potential drop electric capacity is all identical, and four dividing potential drop electric capacity are divided into two groups, and the first dividing potential drop electric capacity and the second dividing potential drop electric capacity are one group, and the 3rd dividing potential drop electric capacity and the 4th dividing potential drop electric capacity are another group; The anode of the anode of the 3rd rectifier diode (D3) and the 4th rectifier diode (D4) joins, this contact and power-output (3) join, the negative electrode of the 3rd rectifier diode and the first AC power end (L) join, the negative electrode of the 4th rectifier diode and the second AC power end (N) join, the anode of first rectifier diode (D1) and the first AC power end (L) join, after being in series, the second dividing potential drop electric capacity (C2) and the first dividing potential drop electric capacity (C1) receives between the negative electrode and power-output (3) of first rectifier diode, wherein the positive pole of the second dividing potential drop electric capacity connects the negative electrode of first rectifier diode, and the negative pole of the first dividing potential drop electric capacity connects the negative output terminal of power supply; The anode of second rectifier diode (D2) and the second AC power end (N) join, after being in series, the 4th dividing potential drop electric capacity (C4) and the 3rd dividing potential drop electric capacity (C3) receives between the negative electrode and power-output of second rectifier diode, wherein the positive pole of the 4th dividing potential drop electric capacity connects the negative electrode of second rectifier diode, and the negative pole of the 3rd dividing potential drop electric capacity connects the negative output terminal of power supply; The positive output end (2) of one end of inductance (L1) and power supply joins, the negative electrode of the other end of inductance and output diode (D9) joins, the anode of output diode and the negative output terminal of power supply join, and output capacitance (C5) is connected between the positive output end and negative output terminal of power supply; The first tap changer pipe (Q4) is connected between the negative electrode of the positive pole of the first dividing potential drop electric capacity (C1) and output diode (D9), the first switching signal output of the control utmost point of the first tap changer pipe and controller (1) joins, the second tap changer pipe (Q3) is connected between the negative electrode of the positive pole of the 3rd dividing potential drop electric capacity (C3) and output diode (D9), and the control utmost point of the second tap changer pipe and the second switch signal output part of controller join; It is characterized in that this capacitance decompression AC-DC switch power source also comprises first isolating diode (D6), second isolating diode (D8), the first ground connection diode (D5), the second ground connection diode (D7), the first discharge switch pipe (Q1) and the second discharge switch pipe (Q2), first isolating diode (D6) is connected between the first dividing potential drop electric capacity and the second dividing potential drop electric capacity, wherein the negative pole of the anode of first isolating diode and the second dividing potential drop electric capacity (C2) joins, and the positive pole of its negative electrode and the first dividing potential drop electric capacity (C1) joins; The anode of the first ground connection diode (D5) and the negative output terminal of power supply join, the negative pole of the negative electrode of the first ground connection diode and the second dividing potential drop electric capacity joins, the first discharge switch pipe (Q1) is connected between the positive pole of the positive pole of the first dividing potential drop electric capacity and the second dividing potential drop electric capacity, and the first discharge switch signal output part of the control utmost point of the first discharge switch pipe and controller (1) joins; Second isolating diode (D8) is connected between the 3rd dividing potential drop electric capacity and the 4th dividing potential drop electric capacity, and wherein the negative pole of the anode of second isolating diode and the 4th dividing potential drop electric capacity (C4) joins, and the positive pole of its negative electrode and the 3rd dividing potential drop electric capacity (C3) joins; The anode of the second ground connection diode (D7) and the negative output terminal of power supply join, the negative pole of the negative electrode of the second ground connection diode and the 4th dividing potential drop electric capacity joins, the second discharge switch pipe (Q2) is connected between the positive pole of the positive pole of the 3rd dividing potential drop electric capacity and the 4th dividing potential drop electric capacity, and the second discharge switch signal output part of the control utmost point of the second discharge switch pipe and controller (1) joins.
2, capacitance decompression AC-DC switch power source as claimed in claim 1, it is characterized in that described every component piezoelectricity has more than three, the parameter of each dividing potential drop electric capacity is all identical, every group dividing potential drop electric capacity is in series, isolating diode of serial connection between per two dividing potential drop electric capacity, the anode of each isolating diode joins by the negative output terminal (3) of a ground connection diode and power supply, in every group the dividing potential drop electric capacity, the positive pole of the dividing potential drop electric capacity that joins with the negative output terminal (3) of power supply joins by the positive pole of a discharge switch pipe and remaining each dividing potential drop electric capacity separately, and the corresponding discharge switch signal output part of the control utmost point of each discharge switch pipe and controller (1) joins.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNB2007101563136A CN100511949C (en) | 2007-10-17 | 2007-10-17 | Capacitance decompression AC-DC switch power source |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101563136A CN100511949C (en) | 2007-10-17 | 2007-10-17 | Capacitance decompression AC-DC switch power source |
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| CN101141099A CN101141099A (en) | 2008-03-12 |
| CN100511949C true CN100511949C (en) | 2009-07-08 |
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2007
- 2007-10-17 CN CNB2007101563136A patent/CN100511949C/en not_active Expired - Fee Related
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