CN204517687U - A kind of efficient non-isolated power supply - Google Patents
A kind of efficient non-isolated power supply Download PDFInfo
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- CN204517687U CN204517687U CN201420732224.7U CN201420732224U CN204517687U CN 204517687 U CN204517687 U CN 204517687U CN 201420732224 U CN201420732224 U CN 201420732224U CN 204517687 U CN204517687 U CN 204517687U
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Abstract
The utility model provides a kind of efficient non-isolated power supply for user, includes efficient non-isolated constant-current supply and efficient non-isolated stabilized voltage power supply.This power supply is made up of rectification circuit, auxiliary power circuit, control circuit and output circuit.Operation principle is: be pulsating dc voltage by rectifier bridge stack 220 volts of commercial power rectification, then is converted to output voltage 0-300 volt, output current 2 amperes by auxiliary power circuit, control circuit and output circuit, is adjusted to automatic constant electric current out-put supply and burning voltage out-put supply according to load voltage requirement.This power circuit device used is few, low cost of manufacture, and volume is little, power output close to lossless, up to 500 watt-hours also without the need to radiator.This power supply has good dimming function for driving Led light fixture.Solve the low efficiency problem that current Led lamp current drives, for the market demand of Gao Xiao Heng stream and constant voltage dc source provides technical guarantee.
Description
Technical field
The utility model relates to a kind of efficient non-isolated supply unit, and its efficiency is high especially, and object is the driving power and other extensive uses that are used as various LED lamp.
Background technology
Generally approve Switching Power Supply at present, but Switching Power Supply reality both domestic and external is unsatisfactory, such as general Switching Power Supply energy consumption is also large, and power-efficient is not high enough, and Partial Power becomes heat and consumes, and also needs to distribute these heats with radiator.
Most popular Switching Power Supply is isolation type switching power supply, and its efficiency is generally between 80-90%, and this means that heating is serious, waste energy is many, and heat radiation burden is heavy; And volume is also very large.Such as, 100 watts of power supplys of Chengdu Ming Wei company production and sales, volume is 234 × 68 × 38.8mm
3=617cm
3, power density is 100/617=0.16 watt/cm
3.Abroad, as the scheme ICL8001G that Infineon releases, power can reach 10W-60W, and printed circuit board area is 20mm × 70mm, and efficiency is 90%.As can be seen here, the efficiency of domestic and international Switching Power Supply, volume, power density are also much the same.Meanwhile, people just reduce power volume in idea, and improve power-efficient, life-span, this is also the development trend of current Switching Power Supply.
The current good non-isolated constant-current supply that can find is HA22004PB, its optimum output voltage is 150-180 volt, and maximum output current is the minimum voltage that 60 MAHs export is 90 volts, and output current is 20 MAHs, the minimum voltage exported is 30 volts, and its steady flow result is not good enough as seen.
Summary of the invention
The purpose of this utility model is: higher for current Switching Power Supply general cost, volume is larger, efficiency is only the lower technical barrier of 80-90%, for user, to provide one to have electronic line structure simple, use electronic devices and components are few, and volume is little, and energy loss is extremely low, do not need to use radiator heat-dissipation, efficiency can up to the efficient non-isolated power supply of 99%.
For reaching goal of the invention of the present utility model, must following technical proposals be implemented:
A kind of efficient non-isolated power supply, includes efficient non-isolated constant-current supply and efficient non-isolated stabilized voltage power supply, wherein said:
Efficient non-isolated constant-current supply comprises the system be made up of rectification circuit, auxiliary power circuit, control circuit and output constant current circuit; Wherein:
Described rectification circuit: its rectifier bridge stack Br
1input two ends connect 220 volts of electric mains, there is one end ground connection at its two ends exported, and then output frequency is 100 hertz to the other end, waveform is sinusoidal wave positive half cycle pulsating dc voltage V0;
Described auxiliary power circuit: be by by rectifier bridge stack Br
1the pulsating dc voltage V0 exported, through diode D
9rectification, electric capacity C
15filtering, exports the direct voltage V1 being about 310 volts; Diode D in the circuit
9anode connect pressure-wire V0, diode D
9cathodic electricity line ball V1 respectively with electric capacity C
15high-pressure stage, resistance R
18high-pressure side connect, and electric capacity C
15low pressure pole then ground connection GND;
Described control circuit: be determine that circuit and silicon touch executive circuit and formed by pressing;
Circuit is determined in pressing wherein, is by resistance R
2, diode D
3, resistance R
4, electric capacity C
5, electric capacity C
6, diode D
7, electric capacity C
8, resistance R
19, diode D
20, diode D
21with voltage stabilizing didoe Z
22formed;
Wherein diode D
3anode and electric capacity C
6high-pressure stage be connected with pressure-wire V0;
And diode D
3negative electrode by resistance R
4output voltage wire Vb, respectively contact resistance R
2high-pressure side, electric capacity C
5high-pressure stage, diode D
7anode, triode T
10base stage and electric capacity C
6low pressure pole; Electric capacity C
5low pressure pole and diode D
7negative electrode connect altogether, its pressure-wire Ve is connected respectively to triode T
10emitter, diode D
21anode, by resistance R
19with diode D
20the low-pressure end of the parallel circuits composed in parallel and electric capacity C
8high-pressure stage; Diode D
21negative electrode connect voltage stabilizing didoe Z
22negative electrode, make diode D
21with voltage stabilizing didoe Z
22composition clamp circuit; Resistance R
2low-pressure end and electric capacity C
8low pressure pole conllinear ground connection, and be connected to rectifier bridge stack Br
1earth terminal;
Press and determine circuit, provide sinusoidal wave just half cycle pulsating dc voltage V0 trailing edge and determine civil power instantaneous voltage when being a little triggered, it finally decides the magnitude of voltage of this electric power output voltage Vout;
Silicon wherein touches executive circuit, is by triode T
10, controllable silicon Si
11, resistance R
12, resistance R
13, electric capacity C
14, resistance R
16, electric capacity C
17, resistance R
23, field effect transistor F
24, voltage stabilizing didoe Z
25with electric capacity C
26formed; Wherein:
Controllable silicon Si
11anode be connected with pressure-wire V0, controllable silicon Si
11cathodic electricity line ball Vk, branch road is by resistance R
13be connected to by resistance R
12with electric capacity C
14the low-pressure end of the parallel circuits formed in parallel and controllable silicon Si
11control pole, the high-pressure side of this parallel circuits is then connected to triode T
10collector electrode on;
Controllable silicon Si
11another branch road of cathodic electricity line ball Vk, is connected to by resistance R
16with electric capacity C
17in parallel form on the high-pressure side of parallel circuits, the low-pressure end then ground connection of this parallel circuits;
Controllable silicon Si
113rd branch road of cathodic electricity line ball Vk, is connected to by resistance R
23, field effect transistor F
24, voltage stabilizing didoe Z
25, electric capacity C
26field effect transistor F in the delay switch circuit formed
24drain electrode, and be connected to diode R by its source electrode
27anode, resistance R
23high-pressure side connect pressure-wire V1, its low-pressure end connects field effect transistor F respectively
24grid and by voltage stabilizing didoe Z
25, electric capacity C
26the high-pressure side of the parallel circuits composed in parallel, the low-pressure end of this parallel circuits and field effect transistor F
24source electrode connect;
Silicon touches executive circuit, provides controllable silicon Si
11trigger voltage pulse required for triggering and conducting, also makes controllable silicon Si
11triggering and conducting and postponing after a period of time, because of field effect transistor F
24conducting just makes controllable silicon Si
11negative electrode and diode R
27anode couple together, henceforth diode R
27electrode potential be exactly the current potential of pressure-wire Vk, controllable silicon Si when avoiding first start
11uncertain voltage during firm triggering and conducting is output;
Described output constant current circuit: be made up of feedback amplifier and output sample circuit; Wherein:
Feedback amplifier is by resistance R
18, resistance R
19, diode D
20, field effect transistor F
28, voltage stabilizing didoe Z
29, electric capacity C
30with resistance R
31formed; Wherein:
Diode D
9cathodic electricity line ball V1 contact resistance R
18after, an one branch road passes through by resistance R
19with diode D
20the parallel circuits formed in parallel is connected to diode D
21anode on; And its another branch road is connected to field effect transistor F
28drain electrode on, by field effect transistor F
28a grid one branch by resistance R
31be connected to the sampled point exporting sample circuit, another branch connects by voltage stabilizing didoe Z
29with electric capacity C
30the high-pressure side of the parallel circuits composed in parallel, the low-pressure end ground connection of this parallel circuits, field effect transistor F
28source electrode also ground connection;
Exporting sample circuit, is by diode D
27, electric capacity C
32, resistance R
33form with load; Wherein:
Diode D
27the output voltage wire Vout of negative electrode, is connected respectively to the high-pressure side of load, voltage stabilizing didoe Z
22anode, ground capacity C
32high-pressure stage on; The low-pressure end contact resistance R of load
33high-pressure side and composition exports the sampled point of sample circuit, feedback amplifier passes through R exactly
31be connected to this sampled point;
Export sample circuit, the sampling of this electric power outputting current, anti-phase amplification feed back to press and determine circuit are provided, and from diode D
27obtain final output current voltage.
Efficient non-isolated stabilized voltage power supply (see Fig. 2) in efficient non-isolated power supply, includes the system be made up of rectification circuit, auxiliary power circuit, control circuit and output voltage stabilizing circuit; Rectification circuit in this system and auxiliary power circuit are identical with efficiently non-rectification circuit in constant-current supply and auxiliary power circuit structure; The structure of its control circuit is substantially identical with efficiently non-control circuit structure in constant-current supply, and difference is in the control circuit of efficient non-isolated stabilized voltage power supply, eliminates by diode D
21with voltage stabilizing didoe Z
22the clamp circuit be composed in series;
And described output voltage stabilizing circuit, be made up of feedback amplifier and output sample circuit; Feedback amplifier is wherein identical with efficiently non-feedback amplifier structure in constant-current supply output constant current circuit, difference be output sample circuit in output voltage stabilizing circuit, be by by diode D
27, electric capacity C
32, resistance R
34, resistance R
33form with load; Wherein:
Diode D
27the output voltage wire Vout of negative electrode, is connected respectively to the high-pressure side of load, resistance R
34high-pressure side and ground capacity C
32high-pressure stage on; By resistance R
34with resistance R
33be composed in series sample circuit, sampled point is exactly resistance R
34low-pressure end and resistance R
33the tie point of high-pressure side, feedback amplifier is exactly by resistance R
31be connected on this sampled point; Resistance R
33low-pressure end ground connection, load low-pressure end also ground connection;
Export sample circuit, the sampling of this electric power output voltage, anti-phase amplification feed back to press and determine circuit are provided, and from diode D
27obtain final output current voltage.
The beneficial effects of the utility model are: this power-efficient has brought up to the level of efficiency far exceeding current Switching Power Supply 90%, show that its power-efficient is up to more than 99% through experiment test, its caloric value reduces greatly, radiator is not needed in practical power device, the supply unit volume manufactured is reduced to greatly even only has several cubic centimetre, required element is little, cost significantly reduces, but the power exported has reached 500 watts, the direct voltage exported reaches as high as 300 volts, minimum only have 0 volt, namely exports and can stand short circuit and do not damage; Utilize and change resistance R
33the way of resistance makes this power supply also have dimming function, drives, solve the practical problem existing for current LED lamp driving power, for the demand of market to efficient direct current power supply provides strong technical support for Led lamp lighting.
Accompanying drawing explanation
Fig. 1 is the utility model efficient non-isolated constant-current power supply circuit circuit principle structure line map
Fig. 2 is the utility model efficient non-isolated voltage-stabilized power supply circuit theory structure line map
Fig. 3 is the utility model efficient non-isolated constant-current power supply circuit functional-block diagram
Fig. 4 is the utility model efficient non-isolated voltage-stabilized power supply circuit functional-block diagram
Mark in figure: rectifier bridge stack Br
1, resistance R
2, diode D
3, resistance R
4, electric capacity C
5, electric capacity C
6, diode D
7, electric capacity C
8, diode D
9, triode T
10, unidirectional controllable silicon S i
11, resistance R
12, resistance R
13, electric capacity C
14, electric capacity C
15, resistance R
16, electric capacity C
17, resistance R
18, resistance R
19, diode D
20, diode D
21, voltage stabilizing didoe Z
22, resistance R
23, field effect transistor F
24, voltage stabilizing didoe Z
25, electric capacity C
26, diode D
27, field effect transistor F
28, voltage stabilizing didoe Z
29, electric capacity C
30, resistance R
31, electric capacity C
32, resistance R
33, resistance R
34, load Lo
35.
Embodiment
The new and effective non-isolated constant-current supply of embodiment 1 one kinds, is shown in Fig. 1.
A kind of efficient non-isolated constant-current supply, includes rectification circuit, auxiliary power circuit, control circuit and output constant current circuit; Wherein:
Described rectification circuit: its rectifier bridge stack Br
1input two ends connect 220 volts of electric mains, there is one end ground connection at its two ends exported, and then output frequency is 100 hertz to the other end, waveform is sinusoidal wave positive half cycle pulsating dc voltage V0;
Described auxiliary power circuit: be by by rectifier bridge stack Br
1the pulsating dc voltage V0 exported, through diode D
9rectification, electric capacity C
15filtering, exports the direct voltage V1 being about 310 volts; Diode D in the circuit
9anode connect pressure-wire V0, diode D
9cathodic electricity line ball V1 respectively with electric capacity C
15high-pressure stage, resistance R
18high-pressure side connect, and electric capacity C
15low pressure pole then ground connection GND;
Described control circuit: determine that circuit and silicon touch executive circuit and formed by pressing;
Wherein pressing and determine circuit, is by diode D
3, resistance R
4, electric capacity C
5, electric capacity C
6, diode D
7, electric capacity C
8, resistance R
2, resistance R
19, diode D
20, diode D
21, voltage stabilizing didoe Z
22composition; Wherein:
Diode D
3anode and electric capacity C
6high-pressure stage be connected with pressure-wire V0; Diode D
3negative electrode by resistance R
4output voltage wire Vb, respectively contact resistance R
2high-pressure side, electric capacity C
5high-pressure stage, diode D
7anode, triode T
10base stage and electric capacity C
6low pressure pole; Electric capacity C
5low pressure pole and diode D
7negative electrode connect altogether, its pressure-wire Ve is connected respectively to triode T
10emitter, diode D
21anode, by resistance R
19with diode D
20the low-pressure end of the parallel circuits composed in parallel and electric capacity C
8high-pressure stage; Diode D
21negative electrode connect voltage stabilizing didoe Z
22negative electrode, make diode D
21with voltage stabilizing didoe Z
22composition clamp circuit; Resistance R
2low-pressure end and electric capacity C
8low pressure pole conllinear ground connection, and be connected to rectifier bridge stack Br
1earth terminal.
Press and determine circuit, can provide the civil power instantaneous voltage that pulsating dc voltage V0 trailing edge is determined when being a little triggered, it finally decides the magnitude of voltage of this electric power output voltage Vout.
Silicon wherein touches executive circuit, is by controllable silicon Si
11, triode T
10, resistance R
12, resistance R
13, electric capacity C
14, resistance R
16, electric capacity C
17, resistance R
23, field effect transistor F
24, voltage stabilizing didoe Z
25with electric capacity C
26composition; Wherein:
Controllable silicon Si
11anode be connected with pressure-wire V0, controllable silicon Si
11cathodic electricity line ball Vk, branch road is by resistance R
13be connected to by resistance R
12with electric capacity C
14the low-pressure end of the parallel circuits formed in parallel and controllable silicon Si
11control pole, the high-pressure side of this parallel circuits is then connected to triode T
10collector electrode on; Controllable silicon Si
11another branch road of cathodic electricity line ball Vk, is connected to by resistance R
16with electric capacity C
17in parallel form on the high-pressure side of parallel circuits, this parallel circuits low-pressure end then ground connection; 3rd branch road of pressure-wire Vk is connected to by resistance R
23, field effect transistor F
24, voltage stabilizing didoe Z
25, electric capacity C
26field effect transistor F in the delay switch circuit of composition
24drain electrode, and be connected to diode D by its source electrode
27anode, resistance R
23high-pressure side connect pressure-wire V1, its low-pressure end connects field effect transistor F respectively
24grid and by voltage stabilizing didoe Z
25, electric capacity C
26the high-pressure side of the parallel circuits composed in parallel, the low-pressure end of this parallel circuits and field effect transistor F
24source electrode connect;
Silicon touches executive circuit, can provide controllable silicon Si
11trigger voltage pulse required for triggering and conducting, also makes controllable silicon Si
11triggering and conducting and postponing after a period of time, because of field effect transistor F
24conducting just makes controllable silicon Si
11negative electrode and diode R
27anode couple together, henceforth diode R
27electrode potential be exactly the current potential of pressure-wire Vk, controllable silicon Si when avoiding first start
11uncertain voltage during firm triggering and conducting is output;
Described output constant current circuit: be made up of feedback amplifier and output sample circuit; Wherein:
Feedback amplifier is by resistance R
18, resistance R
19, diode D
20, field effect transistor F
28, voltage stabilizing didoe Z
29, electric capacity C
30with resistance R
31formed; Wherein:
Diode D
9cathodic electricity line ball V1 contact resistance R
18after, an one branch road passes through by resistance R
19with diode D
20the parallel circuits formed in parallel is connected to diode D
21anode on; And its another branch road is connected to field effect transistor F
28drain electrode on, by field effect transistor F
28a grid one branch by resistance R
31be connected to the sampled point exporting sample circuit, another branch connects by voltage stabilizing didoe Z
29with electric capacity C
30the high-pressure side of the parallel circuits composed in parallel, the low-pressure end ground connection of this parallel circuits, field effect transistor F
28source electrode also ground connection;
Exporting sample circuit, is by diode D
27, electric capacity C
32, resistance R
33form with load; Wherein:
Diode D
27negative electrode output voltage wire Vout, be connected respectively to the high-pressure side of load, voltage stabilizing didoe Z
22anode, ground capacity C
32high-pressure stage on; The low-pressure end contact resistance R of load
33high-pressure side and composition exports the sampled point of sample circuit, feedback amplifier passes through R exactly
31be connected on this sampled point;
Export sample circuit, the sampling of this electric power outputting current, anti-phase amplification feed back to press and determine circuit are provided, and from diode D
27obtain final output current voltage.
Operation principle of the present utility model is as follows:
Fig. 3 gives the functional-block diagram of efficient non-isolated constant-current supply, it by rectification circuit, auxiliary power circuit, control circuit and output constant current circuit totally four parts form.Wherein by pressing, control circuit determines that circuit and silicon touch executive circuit and forms again.
Below in conjunction with Fig. 1, the operation principle of efficient non-isolated constant-current supply is described:
Its rectification circuit provides required DC power supply for this power work.In rectification circuit, AC 220 V civil power input rectifying bridge heap Br
1two inputs and be transformed into pulsating dc voltage V0, its frequency is 100 hertz, and each periodic waveform is that positive half cycle is sinusoidal wave, and highest amplitude is close to 310 volts.
Its auxiliary power circuit is used as the accessory power supply of output constant current circuit.In auxiliary power circuit, pulsating dc voltage V0 is through diode D
9rectification, electric capacity C
15filtering, output dc voltage V1, its value is close to 310 volts.
Its control circuit is used for determining this electric power output voltage value.In control circuit, along with the decline of sine wave positive half cycle pulsating dc voltage V0 trailing edge voltage, determine that voltage Vb in circuit is close to (when being about lower than voltage Ve 0.6 volt of voltage Vb strictly speaking) during voltage Ve when pressing, silicon touches the triode T in executive circuit
10conducting, its collector electrode produces a positive pulse, via resistance R
12with electric capacity C
14after the parallel circuits formed in parallel, arrive controllable silicon Si
11control pole and trigger this controllable silicon, at this controllable silicon Si
11the narrow spike-shaped pulse voltage Vk that negative electrode produces frequency 100 hertz, amplitude is controlled, is passing through by resistance R
23, field effect transistor F
24, voltage stabilizing didoe Z
25, electric capacity C
26after the delay switch circuit of composition, its peak value is by diode D
27rectification and produce out-put supply Vout supply load.Controllable silicon Si
11the afterpulse voltage Vk that is triggered reaches peak value at once, and its value is close to Ve, and now this silicon controlled trigger voltage and negative and positive voltage across poles thereof level off to null value all immediately, this controllable silicon is removed and triggers and be in cut-off state, be stored in electric capacity C
17on electric charge through resistance R
16leak into ground, pulse voltage Vk quickly falls to close to no-voltage, until when after one-period, voltage Vb is again close to voltage Ve, this controllable silicon is again triggered and opens next cycle period.Sampled voltage from output constant current circuit is fed the voltage after amplification, through resistance R
19and diode D
20the parallel circuits composed in parallel pulls voltage Ve rising or declines, but because is subject to by diode D
21with voltage stabilizing didoe Z
22the clamping action of the clamp circuit of composition, the rising of voltage Ve can not exceed voltage Vout, reaches voltage stabilizing didoe Z
22voltage stabilizing value adds more than about 0.6 volt, and it is unrestricted to decline, and is thus easy to regulation voltage Ve.Voltage Ve is very important, and it " decides sinusoidal wave just half cycle pulsating dc voltage V0 trailing edge and determine civil power instantaneous voltage when being a little triggered, namely decide the magnitude of voltage of this electric power output voltage Vout, guarantee the stable of output current with this.
Output constant current circuit is under the effect of control circuit, and the current/voltage realizing this power supply exports.In output constant current circuit, from load flow out electric current at resistance R
33the voltage of upper foundation is sampled, through resistance R
31arrive field effect transistor F
28grid, through this field effect transistor F
28after amplification, export in the anti-phase amplification of its drain electrode, then through resistance R
19and diode D
20the parallel circuits composed in parallel exports triode T to
10emitter, namely remove adjustment voltage Ve and determine controllable silicon Si in feedback adjusting mode
11during triggering, the trailing edge instantaneous voltage of voltage V0, finally determines output voltage values.Resistance R
18field effect transistor F
28the load resistance of drain electrode; Electric capacity C
32electric charge and filter action is stored for output circuit provides.Voltage stabilizing didoe Z
29the grid clamping of field effect transistor voltage range below 10 volts, play the effect of protection field effect transistor; Electric capacity C
30to passing through resistance R
31the voltage signal sampled plays the effect of suitable filtering.
In real work, for ease of adjustment output current, resistance R
33available variable resistor replaces, and so just can change output current on a large scale easily.
This constant-current supply has accomplished that volume is little of several cubic centimetre at present, required element 33, the power exported has reached 500 watts, power-efficient reaches about 99%, the direct voltage exported reaches as high as 300 volts, minimum only have 0 volt, and namely export and can stand short circuit and do not damage, maximum output current has surpassed 2 amperes.
The efficient non-isolated stabilized voltage power supply of embodiment 2 one kinds, is shown in Fig. 2.
A kind of efficient non-isolated stabilized voltage power supply, includes the system of rectification circuit, auxiliary power circuit, control circuit and output voltage stabilizing circuit composition.Rectification circuit in this system is identical with the rectification circuit in efficient non-isolated constant-current supply and auxiliary power circuit structure with auxiliary power circuit; The structure of its control circuit is substantially identical with the control circuit structure in efficient non-isolated constant-current supply, and difference eliminates by diode D in the control circuit of efficient non-isolated stabilized voltage power supply
21with voltage stabilizing didoe Z
22the clamp circuit be composed in series;
And described output voltage stabilizing circuit, be made up of feedback amplifier and output sample circuit; Feedback amplifier is wherein identical with the feedback amplifier structure in efficient non-isolated constant-current supply output constant current circuit, difference be output sample circuit in output voltage stabilizing circuit be by diode D
27, electric capacity C
32, resistance R
34, resistance R
33form with load; Wherein:
Diode D
27the output voltage wire Vout of negative electrode, is connected respectively to the high-pressure side of load, resistance R
34high-pressure side and ground capacity C
32high-pressure stage on; By resistance R
34with resistance R
33be composed in series sample circuit, sampled point is exactly resistance R
34low-pressure end and resistance R
33the tie point of high-pressure side, feedback amplifier is exactly by resistance R
31be connected on this sampled point; Resistance R
33low-pressure end ground connection, load low-pressure end also ground connection;
Export sample circuit, the sampling of this electric power output voltage, anti-phase amplification feed back to press and determine circuit are provided, and from diode D
27obtain final output current voltage.
The functional-block diagram of efficient non-isolated stabilized voltage power supply is shown in Fig. 4, and it is made up of rectification circuit, auxiliary rectifier circuit, control circuit and output voltage stabilizing circuit four parts.
Below in conjunction with Fig. 2, the operation principle of efficient non-isolated stabilized voltage power supply is described:
In efficient non-isolated stabilized voltage power supply, wherein the structure of rectification circuit, auxiliary power circuit, control circuit and element title almost identical with Fig. 1, difference is the diode D of composition clamp circuit
21with voltage stabilizing didoe Z
22can save need not.Only the operation principle of output voltage stabilizing circuit is described below:
In output voltage stabilizing circuit, by resistance R
34with resistance R
33form voltage divider and export branch pressure voltage, obtaining sampled voltage, through resistance R
31be applied to field effect transistor F
28grid on, at this field effect transistor F
28in anti-phase amplification and its drain electrode export, at resistance R
18low-pressure end sets up reverse voltage, through resistance R
19with diode D
20the parallel circuits formed in parallel goes to pull voltage Ve, makes it to be stabilized in predetermined voltage, and it decides sinusoidal wave just half cycle pulsating dc voltage V0 trailing edge and determines civil power instantaneous voltage when being a little triggered, thus controllable silicon Si
11the output voltage Vk being triggered produced also just determines.Change resistance R
34, resistance R
33the magnitude of voltage of both resistance value ratio adjustable output voltage Vout; Electric capacity C
32for carrying out filtering to out-put supply Vout.Electric capacity C
30to passing through resistance R
31the voltage signal sampled plays the effect of suitable filtering.
In real work, for ease of adjustment output voltage, resistance R
33available variable resistor replaces, and so just can change output voltage on a large scale easily.
This stabilized voltage power supply has accomplished that volume only has several cubic centimetre, required element 32 at present, and the power of output has reached 500 watts, power-efficient reaches about 99%, the direct voltage exported reaches as high as 300 volts, and minimum is 0 volt, and maximum output current is more than 2 amperes.
Applicant in this case had once applied for " efficient Unisolated switch power supply " on August 9th, 2012.
This power supply is about 310 volts that commercial power rectification is obtained, and when being opened or turn off the electric current of the field effect transistor of connecting with inductance by switching signal, on inductance, step-down obtains required low voltage.This case does not have this switch buck mode, but when adopting the pulsating dc voltage that obtains of commercial power rectification to drop to close to required output voltage, the output that now rectification obtains, export after being switched to output filter capacitor filtering, and obtaining required output current voltage, the power supply architecture of two cases is completely different.The power supply of this case application does not have the structure of step-down, avoids the waste of energy that step-down causes, greatly improves power-efficient.
Claims (2)
1. an efficient non-isolated power supply, include efficient non-isolated constant-current supply and efficient non-isolated stabilized voltage power supply, it is characterized in that: efficient non-isolated constant-current supply wherein, includes the system be made up of rectification circuit, auxiliary power circuit, control circuit and output constant current circuit; Wherein:
Described rectification circuit: access rectifier bridge stack Br by 220 volts of electric mains
1two inputs, rectifier bridge stack Br
1output two ends have one end ground connection, the pulsating dc voltage V0 that other end output frequency is 100 hertz, waveform is sinusoidal wave positive half cycle;
Described auxiliary power circuit: be by by rectifier bridge stack Br
1the pulsating dc voltage V0 exported, through diode D
9rectification, electric capacity C
15after filtering, export the direct voltage V1 being about 310 volts; Diode D in the circuit
9anode connect pressure-wire V0, diode D
9cathodic electricity line ball V1 respectively with electric capacity C
15high-pressure stage, resistance R
18high-pressure side connect, and electric capacity C
15low pressure pole then ground connection GND;
Described control circuit: determine that circuit and silicon touch executive circuit and forms by pressing;
Circuit is determined in pressing wherein, is by resistance R
2, diode D
3, resistance R
4, electric capacity C
5, electric capacity C
6, diode D
7, electric capacity C
8, resistance R
19, diode D
20, diode D
21with voltage stabilizing didoe Z
22composition;
Wherein diode D
3anode and electric capacity C
6high-pressure stage be connected with pressure-wire V0; And diode D
3negative electrode by resistance R
4output voltage wire Vb, respectively contact resistance R
2high-pressure side, electric capacity C
5high-pressure stage, diode D
7anode, triode T
10base stage and electric capacity C
6low pressure pole; Electric capacity C
5low pressure pole and diode D
7negative electrode connect altogether, its pressure-wire Ve is connected respectively to triode T
10emitter, diode D
21anode, by resistance R
19with diode D
20the low-pressure end of the parallel circuits composed in parallel and electric capacity C
8high-pressure stage; Diode D
21negative electrode connect voltage stabilizing didoe Z
22negative electrode, make diode D
21with voltage stabilizing didoe Z
22composition clamp circuit; Resistance R
2low-pressure end and electric capacity C
8low pressure pole conllinear ground connection, and be connected to rectifier bridge stack Br
1earth terminal;
Press and determine circuit, provide sinusoidal wave just half cycle pulsating dc voltage V0 trailing edge and determine civil power instantaneous voltage when being a little triggered, it finally decides the magnitude of voltage of this electric power output voltage Vout;
Silicon wherein touches executive circuit, is by triode T
10, controllable silicon Si
11, resistance R
12, resistance R
13, electric capacity C
14, resistance R
16, electric capacity C
17, resistance R
23, field effect transistor F
24, voltage stabilizing didoe Z
25with electric capacity C
26formed; Wherein:
Controllable silicon Si
11anode be connected with pressure-wire V0, the pressure-wire Vk of its negative electrode, branch road is by resistance R
13be connected to by resistance R
12with electric capacity C
14the low-pressure end of the parallel circuits formed in parallel and controllable silicon Si
11control pole, the high-pressure side of this parallel circuits is then connected to triode T
10collector electrode on;
Another branch road of pressure-wire Vk is connected to by resistance R
16with electric capacity C
17in parallel form on the high-pressure side of parallel circuits, the low-pressure end then ground connection of this parallel circuits;
3rd branch road of pressure-wire Vk is connected to by resistance R
23, field effect transistor F
24, voltage stabilizing didoe Z
25, electric capacity C
26field effect transistor F in the delay switch circuit formed
24drain electrode, and be connected to diode R by its source electrode
27anode, resistance R
23high-pressure side connect pressure-wire V1, its low-pressure end connects field effect transistor F respectively
24grid and by voltage stabilizing didoe Z
25, electric capacity C
26the high-pressure side of the parallel circuits composed in parallel, the low-pressure end of this parallel circuits and field effect transistor F
24source electrode connect;
Silicon touches executive circuit, provides controllable silicon Si
11trigger voltage pulse required for triggering and conducting, also makes controllable silicon Si
11triggering and conducting and postponing after a period of time, because of field effect transistor F
24conducting just makes controllable silicon Si
11negative electrode and diode R
27anode couple together, henceforth diode R
27electrode potential be exactly the current potential of pressure-wire Vk, controllable silicon Si when avoiding first start
11uncertain voltage during firm triggering and conducting is output;
Described output constant current circuit: be made up of feedback amplifier and output sample circuit; Wherein: feedback amplifier, be by resistance R
18, resistance R
19, diode D
20, field effect transistor F
28, voltage stabilizing didoe Z
29, electric capacity C
30with resistance R
31formed; Wherein:
Diode D
9cathodic electricity line ball V1 contact resistance R
18after, an one branch road passes through by resistance R
19with diode D
20the parallel circuits formed in parallel is connected to diode D
21anode on, and its another branch road is connected to field effect transistor F
28drain electrode on, by field effect transistor F
28a grid one branch by resistance R
31be connected to the sampled point exporting sample circuit, another branch is connected to by voltage stabilizing didoe Z
29with electric capacity C
30the high-pressure side of the parallel circuits formed in parallel, the low-pressure end ground connection of this parallel circuits, field effect transistor F
28source electrode also ground connection;
Exporting sample circuit, is by diode D
27, electric capacity C
32, resistance R
33form with load; Wherein:
Diode D
27the output voltage wire Vout of negative electrode, is connected respectively to the high-pressure side of load, voltage stabilizing didoe Z
22anode, ground capacity C
32high-pressure stage on; The low-pressure end contact resistance R of load
33high-pressure side and composition exports the sampled point of sample circuit, feedback amplifier passes through R exactly
31be connected to this sampled point;
Export sample circuit, the sampling of this electric power outputting current, anti-phase amplification feed back to press and determine circuit are provided, and from diode D
27obtain final output current voltage.
2. according to efficient non-isolated power supply according to claim 1, it is characterized in that: wherein included efficient non-isolated stabilized voltage power supply, comprises the system be made up of rectification circuit, auxiliary power circuit, control circuit and output voltage stabilizing circuit; Rectification circuit in this system is identical with the rectification circuit in efficient non-isolated constant-current supply and auxiliary power circuit structure with auxiliary power circuit; The structure of its control circuit is substantially identical with the control circuit structure in efficient non-isolated constant-current supply, and difference eliminates by diode D in the control circuit of efficient non-isolated stabilized voltage power supply
21with voltage stabilizing didoe Z
22the clamp circuit be composed in series;
And described output voltage stabilizing circuit: be made up of feedback amplifier and output sample circuit; Feedback amplifier is wherein identical with the feedback amplifier structure in efficient non-isolated constant-current supply output constant current circuit, difference be output sample circuit in output voltage stabilizing circuit be by diode D
27, electric capacity C
32, resistance R
34, resistance R
33form with load; Wherein:
Diode D
27the output voltage wire Vout of negative electrode, is connected respectively to the high-pressure side of load, resistance R
34high-pressure side and ground capacity C
32high-pressure stage on; By resistance R
34with resistance R
33be composed in series sample circuit, sampled point is exactly resistance R
34low-pressure end and resistance R
33the tie point of high-pressure side, feedback amplifier is exactly by resistance R
31be connected on this sampled point; Resistance R
33low-pressure end ground connection, load low-pressure end also ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420732224.7U CN204517687U (en) | 2014-12-01 | 2014-12-01 | A kind of efficient non-isolated power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420732224.7U CN204517687U (en) | 2014-12-01 | 2014-12-01 | A kind of efficient non-isolated power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204517687U true CN204517687U (en) | 2015-07-29 |
Family
ID=53715615
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420732224.7U Expired - Fee Related CN204517687U (en) | 2014-12-01 | 2014-12-01 | A kind of efficient non-isolated power supply |
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| Country | Link |
|---|---|
| CN (1) | CN204517687U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104362873A (en) * | 2014-12-01 | 2015-02-18 | 张光阳 | Efficient non-isolated power source |
| CN105848334A (en) * | 2016-03-26 | 2016-08-10 | 中山市德源照明电器有限公司 | LED constant current control power supply |
| CN112701881A (en) * | 2021-01-25 | 2021-04-23 | 上海雷诺尔科技股份有限公司 | High-voltage series silicon controlled rectifier dual-power trigger system |
| CN117595067A (en) * | 2024-01-18 | 2024-02-23 | 深圳市吉斯迪科技有限公司 | Constant-current power supply circuit of capacitor energy-storage pulse laser |
-
2014
- 2014-12-01 CN CN201420732224.7U patent/CN204517687U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104362873A (en) * | 2014-12-01 | 2015-02-18 | 张光阳 | Efficient non-isolated power source |
| CN105848334A (en) * | 2016-03-26 | 2016-08-10 | 中山市德源照明电器有限公司 | LED constant current control power supply |
| CN112701881A (en) * | 2021-01-25 | 2021-04-23 | 上海雷诺尔科技股份有限公司 | High-voltage series silicon controlled rectifier dual-power trigger system |
| CN117595067A (en) * | 2024-01-18 | 2024-02-23 | 深圳市吉斯迪科技有限公司 | Constant-current power supply circuit of capacitor energy-storage pulse laser |
| CN117595067B (en) * | 2024-01-18 | 2024-04-02 | 深圳市吉斯迪科技有限公司 | Constant-current power supply circuit of capacitor energy-storage pulse laser |
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