CN203933392U - A kind of D.C. regulated power supply - Google Patents
A kind of D.C. regulated power supply Download PDFInfo
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- CN203933392U CN203933392U CN201420186257.6U CN201420186257U CN203933392U CN 203933392 U CN203933392 U CN 203933392U CN 201420186257 U CN201420186257 U CN 201420186257U CN 203933392 U CN203933392 U CN 203933392U
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Abstract
The utility model discloses a kind of D.C. regulated power supply, comprise power circuit, control circuit and output circuit, power circuit comprises main power supply circuits and secondary power supply circuits, and control circuit comprises that keyboard, single-chip microcomputer, output circuit comprise voltage stabilizing circuit, reference resistance and the variable resistor by Single-chip Controlling resistance; The output of the main power supply circuits of input termination of output circuit, is connected between the both positive and negative polarity of output circuit output after reference resistance and variable resistor series connection; The constant voltage output of voltage stabilizing circuit and reference resistance also connect, and the output of keyboard connects the control signal input of single-chip microcomputer.The utility model is inputted required magnitude of voltage by keyboard, by Single-chip Controlling output voltage, easy and simple to handle, and output voltage is accurate fast.
Description
[technical field]
The utility model relates to power circuit, relates in particular to a kind of D.C. regulated power supply.
[background technology]
Power technology especially DCPS digitally controlled power source technology is an engineering that practicality is very strong, serves all trades and professions.The subjects fields such as that current power technology has merged is electric, electronics, the system integration, control theory, material.Along with the modern information technologies revolution that computer and mechanics of communication develop, provide vast potential for future development to power electronic technology, also have higher requirement to power supply simultaneously.The generally use of DCPS digitally controlled power source in electronic installation, common power, in the error that when work produces, can affect the accuracy of whole system.Power supply can cause a lot of adverse consequencess in use, and countries in the world have proposed different requirements and formulated a series of Product Precision standard power supply product one after another.Only have the product standard of meeting, can come into the market.Along with the development of economic globalization, the product that meets international standard could obtain the pass of turnover.DCPS digitally controlled power source is from just real the growing up eighties, and the power electronics theory of system starts to set up during this time.These theories provide a good basis for its development afterwards.Following period of time afterwards, DCPS digitally controlled power source technology has had significant progress.But its product exists numerical control degree not reach the shortcoming that requirement, resolution are not high, power density is lower, reliability is poor.Therefore the main developing direction of DCPS digitally controlled power source, is constantly improved for above-mentioned shortcoming.The development that appears as accurate DCPS digitally controlled power source of singlechip technology and voltage transformation module provides favourable condition.Aspect power electronic device, be nearly all knob switch regulation voltage at present, degree of regulation is not high, and often saltus step, uses trouble.
[summary of the invention]
The technical problems to be solved in the utility model is to provide a kind of easy and simple to handle, accurate D.C. regulated power supply of output voltage.
In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is, a kind of D.C. regulated power supply, comprise power circuit, control circuit and output circuit, power circuit comprises main power supply circuits and secondary power supply circuits, and control circuit comprises that keyboard, single-chip microcomputer, output circuit comprise voltage stabilizing circuit, reference resistance and the variable resistor by Single-chip Controlling resistance; The output of the main power supply circuits of input termination of output circuit, is connected between the both positive and negative polarity of output circuit output after reference resistance and variable resistor series connection; The constant voltage output of voltage stabilizing circuit and reference resistance also connect, and the output of keyboard connects the control signal input of single-chip microcomputer.
Above-described D.C. regulated power supply, voltage stabilizing circuit comprises three terminal regulator, and the input pin of three terminal regulator connects the positive pole of secondary power supply circuits output, and output pin connects the first end of reference resistance, and grounding leg connects the second end of reference resistance; The second end of reference resistance connects the negative pole of output circuit input and the negative pole of output by variable resistor; The positive pole of the first termination output circuit output of reference resistance.
Above-described D.C. regulated power supply, output circuit comprises the 5th electric capacity, the 6th electric capacity and the 7th electric capacity, the 5th electric capacity is connected between the both positive and negative polarity of output circuit input, the 7th electric capacity is connected between the both positive and negative polarity of output circuit output, and the 6th electric capacity is connected between the grounding leg of three terminal regulator and the negative pole of output circuit input.
Above-described D.C. regulated power supply, output circuit comprises the first diode and the second diode, and the anode of the first diode connects the grounding leg of three terminal regulator, and negative electrode connects the output pin of three terminal regulator; The anode of the second diode connects the output pin of three terminal regulator, and negative electrode connects the input pin of three terminal regulator.
Above-described D.C. regulated power supply, variable resistor comprises the mutually different resistance of resistance of N series connection, control circuit comprises the relay identical with resistance quantity and the triode identical with relay quantity, the main contact parallel of each resistance and a relay; The positive pole of the secondary power supply circuits output of one termination of each relay main coil, the collector electrode of a triode of another termination; The grounded emitter of each triode, base stage connects a control signal output pin of single-chip microcomputer.
Above-described D.C. regulated power supply, the resistance of N the mutually different resistance of resistance is respectively R, 2R, 4R ... 2
(N-1)r.
Above-described D.C. regulated power supply, power circuit comprises transformer, transformer comprises the first secondary coil and second subprime coil, the main power supply circuits of power circuit comprise the first secondary coil and first current rectifying and wave filtering circuit of transformer, the input of output termination first current rectifying and wave filtering circuit of the first secondary coil, the input of the output termination output circuit of the first current rectifying and wave filtering circuit; Secondary power supply circuits comprise second subprime coil, the second current rectifying and wave filtering circuit and second three terminal regulator of transformer, the input of output termination second current rectifying and wave filtering circuit of second subprime coil, the input pin of the second three terminal regulator connects the positive pole of the output of the second current rectifying and wave filtering circuit, grounding leg connects the negative pole of output and the negative pole of secondary power supply circuits output of the second current rectifying and wave filtering circuit, and the output pin of the second three terminal regulator connects the positive pole of secondary power supply circuits output.
Above-described D.C. regulated power supply, control circuit comprises digital display circuit and display screen, digital display circuit connects the display output of single-chip microcomputer, the output termination display screen of digital display circuit.
The utility model D.C. regulated power supply has following beneficial effect:
1. simple and convenient, can input in real time required voltage value, and can quick and precisely export;
2. needed raw material has versatility, with low cost.
[brief description of the drawings]
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Fig. 1 is the system block diagram of the utility model embodiment D.C. regulated power supply.
Fig. 2 is the circuit diagram of the utility model embodiment D.C. regulated power supply power unit.
Fig. 3 is the circuit diagram of the utility model embodiment D.C. regulated power supply power supply output.
Fig. 4 is the circuit diagram of the utility model embodiment D.C. regulated power supply power control part.
Fig. 5 is the variable-resistance circuit diagram of the utility model embodiment D.C. regulated power supply power supply.
[embodiment]
The structure of the utility model embodiment D.C. regulated power supply as shown in Figures 1 to 5, comprises transformer, current rectifying and wave filtering circuit, three terminal regulator, voltage conversion circuit (secondary power supply circuits), single-chip microcomputer, drive circuit, resistor network, display screen, digital display circuit, keyboard, analog switch.The utility model embodiment, taking single-chip microcomputer as core, monitors the input signal of keyboard on one side, shows current output voltage value on one side by display screen, and to passing through the resistance value of analog switch adjusting resistance network.In the time controlling the increasing-and-decreasing key of output voltage in keyboard and be pressed, Single-chip Controlling analog switch carries out corresponding increase and decrease operation to the resistance value of resistor network, and output voltage is updated to current set point.The Digital DC Voltage-stabilized Power Source of the utility model embodiment can regulation output voltage between 2～20V, the amplitude of accommodation is 0.1V, output current is more than 1A.
As shown in Figure 2, in power unit, the secondary alternating voltage of transformer T1 is 0.8 times of left and right of Digital DC Voltage-stabilized Power Source output voltage, considers may have ± 10% fluctuation of line voltage, so the alternating voltage of transformer T1 secondary output is 24V and 9V.
Filter capacitor C1 chooses: the discharge time constant of general filter capacitor is greater than 3-5 times of its charge cycle, owing to being bridge rectifier, so the half period l0ms that the charge cycle of capacitor C 1 is AC power; Because the output voltage maximum of this rectification circuit is 25V, output current is 1.1A, so equivalent d.c. resistance can be approximately 25 ohm again.Be that 5 × lOms=0.05s has C1=2000uF if get the discharge time constant of C1.Same method can be chosen C3=4000uF.Except capacity, in the time that rectification circuit is capacitive load, the maximum of filter capacitor both end voltage can reach 1.4 times of transformer secondary alternating voltage, should be greater than 36V so C1 is withstand voltage, and C3 is withstand voltage should be greater than 14V.
The circuit of the DC voltage-stabilizing output of Digital DC Voltage-stabilized Power Source as shown in Figure 3; DC voltage-stabilizing output is selected three terminal regulator LM317; the rated current of LM317 can reach 1.5A, and the adjustable range of output voltage is 1.2-37V, inside has overheated and current foldback circuit.
The stored charge that diode D2 can be load capacitance C7 provides a discharge path, and output voltage V o has following relational expression Vo=1.25+VB; VB=(I
r+ 1.25/R1) * R2; Wherein, I
rfor flow out adjust end electric current, be about 50A, and in the excursion of whole output voltage and electric current, can be similar to regard as constant.For ensureing that circuit is normally worked when the load open circuit, require the electric current that flows through R1 to be not less than 5mA, and the voltage at R1 two ends is constant 1.25V, desirable R1=1.25V/0.005A=250 ohm.Regulate the size of variable resistor R2 just can change the value of output voltage V o.
As shown in Figure 5, variable resistor R2 adopts 8 power resistance series networks of discrete component composition, can realize the object of numerical control output voltage.8 resistance R 1 of this resistance series network, R2 ... the resistance value of R8 is followed successively by R, 2R, 4R ... 2
7r and each resistance and relay (K1, a K2 ... K8) normally-closed contact (K1_1, K2_1 ... K8_1) parallel connection.Ignore IR, getting step-by-step adjustment unit is 0.1V, and R=0.1V/0.005A=20 ohm can be tried to achieve the resistance value of other resistance of this network according to this.
In order to ensure the accuracy of output voltage, resistor network can replace with precision potentiometer, and its resistance is finally determined in the time of debugging.Analog switch is selected relay, because the conducting resistance of conventional analog electronic switch has tens to hundreds of Europe, and unstable, can not meet the demands, so adopted dry-reed relay in the present embodiment.Owing to will driving 8 relays (K1, K2 ... K8), and the attract current of relay can reach 10mA left and right, contact pickup time is 1～2 millisecond, as shown in Figure 4, and each relay (K1, K2 ... K8) can be respectively with triode (Q1, a Q2 ... Q8) drive.Each relay main coil (K1, K2 ... the positive pole of the secondary power supply circuits output of a termination K8), another termination triode (Q1, a Q2 ... Q8) collector electrode; Each triode (Q1, Q2 ... Q8) grounded emitter, base stage connects a control signal output pin of single-chip microcomputer
The keyboard of DCPS digitally controlled power source and display section are arranged on guidance panel, comprise keyboard and the LCD MODULE LCM of 16 keys.Wherein LCM module is selected dot matrix LCD module SMG240128A. its built-in T6963C and compatible controller, it can display power supply magnitude of voltage and the operating state of output.
The operation principle of the present embodiment is as follows: press the keyboard input required voltage value in Fig. 1 by craft, magnitude of voltage is presented on the display screen in Fig. 1, change the variable resistor R2 in Fig. 3 by 8 relays of the Single-chip Controlling in Fig. 4, change the output voltage V o in Fig. 3, realize the output of required voltage value.
Claims (8)
1. a D.C. regulated power supply, it is characterized in that, comprise power circuit, control circuit and output circuit, power circuit comprises main power supply circuits and secondary power supply circuits, control circuit comprises keyboard and single-chip microcomputer, and output circuit comprises voltage stabilizing circuit, reference resistance and the variable resistor by Single-chip Controlling resistance; The output of the main power supply circuits of input termination of output circuit, is connected between the both positive and negative polarity of output circuit output after reference resistance and variable resistor series connection; The constant voltage output of voltage stabilizing circuit and reference resistance also connect, and the output of keyboard connects the control signal input of single-chip microcomputer.
2. D.C. regulated power supply according to claim 1, it is characterized in that, voltage stabilizing circuit comprises three terminal regulator, and the input pin of three terminal regulator connects the positive pole of secondary power supply circuits output, output pin connects the first end of reference resistance, and grounding leg connects the second end of reference resistance; The second end of reference resistance connects the negative pole of output circuit input and the negative pole of output by variable resistor; The positive pole of the first termination output circuit output of reference resistance.
3. D.C. regulated power supply according to claim 2, it is characterized in that, output circuit comprises the 5th electric capacity, the 6th electric capacity and the 7th electric capacity, the 5th electric capacity is connected between the both positive and negative polarity of output circuit input, the 7th electric capacity is connected between the both positive and negative polarity of output circuit output, and the 6th electric capacity is connected between the grounding leg of three terminal regulator and the negative pole of output circuit input.
4. D.C. regulated power supply according to claim 3, is characterized in that, output circuit comprises the first diode and the second diode, and the anode of the first diode connects the grounding leg of three terminal regulator, and negative electrode connects the output pin of three terminal regulator; The anode of the second diode connects the output pin of three terminal regulator, and negative electrode connects the input pin of three terminal regulator.
5. D.C. regulated power supply according to claim 1, it is characterized in that, variable resistor comprises the mutually different resistance of resistance of N series connection, control circuit comprises the relay identical with resistance quantity and the triode identical with relay quantity, the main contact parallel of each resistance and a relay; The positive pole of the secondary power supply circuits output of one termination of each relay main coil, the collector electrode of a triode of another termination; The grounded emitter of each triode, base stage connects a control signal output pin of single-chip microcomputer.
6. D.C. regulated power supply according to claim 5, is characterized in that, the resistance of N the mutually different resistance of resistance is respectively R, 2R, 4R ... 2
(N-1)r.
7. D.C. regulated power supply according to claim 1, it is characterized in that, power circuit comprises transformer, transformer comprises the first secondary coil and second subprime coil, the main power supply circuits of power circuit comprise the first secondary coil and first current rectifying and wave filtering circuit of transformer, the input of output termination first current rectifying and wave filtering circuit of the first secondary coil, the input of the output termination output circuit of the first current rectifying and wave filtering circuit; Secondary power supply circuits comprise second subprime coil, the second current rectifying and wave filtering circuit and second three terminal regulator of transformer, the input of output termination second current rectifying and wave filtering circuit of second subprime coil, the input pin of the second three terminal regulator connects the positive pole of the output of the second current rectifying and wave filtering circuit, grounding leg connects the negative pole of output and the negative pole of secondary power supply circuits output of the second current rectifying and wave filtering circuit, and the output pin of the second three terminal regulator connects the positive pole of secondary power supply circuits output.
8. D.C. regulated power supply according to claim 1, is characterized in that, control circuit comprises digital display circuit and display screen, and digital display circuit connects the display output of single-chip microcomputer, the output termination display screen of digital display circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420186257.6U CN203933392U (en) | 2014-04-17 | 2014-04-17 | A kind of D.C. regulated power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420186257.6U CN203933392U (en) | 2014-04-17 | 2014-04-17 | A kind of D.C. regulated power supply |
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| Publication Number | Publication Date |
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| CN203933392U true CN203933392U (en) | 2014-11-05 |
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| CN201420186257.6U Expired - Fee Related CN203933392U (en) | 2014-04-17 | 2014-04-17 | A kind of D.C. regulated power supply |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109188946A (en) * | 2017-06-30 | 2019-01-11 | 沈阳新松机器人自动化股份有限公司 | A kind of controller and beddo, electric wheelchair |
| CN110794908A (en) * | 2019-10-10 | 2020-02-14 | 天津大学 | Voltage source for bias superconducting nanowire single-photon detector |
-
2014
- 2014-04-17 CN CN201420186257.6U patent/CN203933392U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109188946A (en) * | 2017-06-30 | 2019-01-11 | 沈阳新松机器人自动化股份有限公司 | A kind of controller and beddo, electric wheelchair |
| CN109188946B (en) * | 2017-06-30 | 2021-04-27 | 沈阳新松机器人自动化股份有限公司 | Controller, electric bed and electric wheelchair |
| CN110794908A (en) * | 2019-10-10 | 2020-02-14 | 天津大学 | Voltage source for bias superconducting nanowire single-photon detector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141105 Termination date: 20210417 |