CN202586343U - Parallel power-source power unit - Google Patents
Parallel power-source power unit Download PDFInfo
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- CN202586343U CN202586343U CN 201220229898 CN201220229898U CN202586343U CN 202586343 U CN202586343 U CN 202586343U CN 201220229898 CN201220229898 CN 201220229898 CN 201220229898 U CN201220229898 U CN 201220229898U CN 202586343 U CN202586343 U CN 202586343U
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- modular converter
- power supply
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Abstract
The utility model belongs to the technical field of parallel power-source power units and provides a parallel power-source power unit which can flexibly control output current of parallel branch circuits of a power supply. An output end of a first direct current (DC) power supply is connected with an input end of a first DC/DC converting module. An output end of a second DC power supply is connected with an input end of a second DC/DC converting module. An anode output end of the first DC/DC converting module is connected with an emitting electrode of a positive-negative-positive (PNP) triode Q1. A collector electrode of the PNP triode Q1 is connected with on end of a sampling resistor R1. An anode output end of the second DC/DC converting module is connected with one end of a sampling resistor R2. A cathode output end of the first DC/DC converting module is connected with a cathode output end of the second DC/DC converting module in parallel and then is earthed. The parallel power-source power unit is applied to electronic devices which use power supplied by parallel power sources.
Description
Technical field
A kind of parallel connection power supply electric supply installation of the utility model belongs to parallel connection power supply electric supply installation technical field.
Background technology
Along with the development of power electronic technology, power technology is widely used in fields such as computer, industrial instrumentation instrument, military affairs, space flight, relates to the national economy all trades and professions; Various electronic installations require increasingly highly to power, and also more and more harsher to the requirement of electric current, developing various high-power, high performance Switching Power Supplies becomes trend; In development process; Semiconductor constitutes limitations affect such as power device, magnetic material in the power module owing to receive, and the peak power output of single switch power module is limited, therefore; The large power, electrically origin system need be used some Switching Power Supply parallel runnings, to satisfy the requirement of bearing power; Existing parallel connection power supply electric supply installation, two-way source current size is uncontrollable, and parallel connection power supply can not required rated current and the rated voltage of output loading, causes loaded work piece unstable easily, and possibly damage load and parallel connection power supply.
The utility model content
The utility model overcomes the deficiency that prior art exists, and technical problem to be solved is: a kind of electric supply installation that can control each parallel branch output current of power supply flexibly is provided.
For addressing the above problem; The technical scheme that the utility model adopted is: a kind of parallel connection power supply electric supply installation comprises: first DC power supply, second DC power supply, a DC/DC modular converter, the 2nd DC/DC modular converter, single-chip microcomputer, A/D modular converter, D/A modular converter, load, PNP triode Q1 and sampling resistor R1, R2, R3; The output of said first DC power supply links to each other with the input of a DC/DC modular converter, and the output of second DC power supply links to each other with the input of the 2nd DC/DC modular converter;
The cathode output end of a said DC/DC modular converter links to each other with the emitter of PNP triode Q1; The collector electrode of said PNP triode Q1 links to each other with the end of sampling resistor R1; The cathode output end of said the 2nd DC/DC modular converter links to each other with the end of sampling resistor R2, the cathode output end of a DC/DC modular converter and connect the cathode output end of the 2nd DC/DC modular converter after ground connection; The other end of said sampling resistor R1 and connect the other end of sampling resistor R2 after link to each other ground connection after the other end serial connection load of said sampling resistor R3 with the end of sampling resistor R3;
Said A/D modular converter links to each other with the input of single-chip microcomputer, and the A/D modular converter is gathered the last current/voltage value of sampling resistor R1, R2, R3 and is sent to single-chip microcomputer, links to each other with the base stage of PNP triode Q1 behind the output serial connection D/A modular converter of said single-chip microcomputer.
Also be serially connected with diode D1 between the collector electrode of said PNP triode Q1 and the sampling resistor R1, also be serially connected with diode D2 between the cathode output end of the 2nd DC/DC modular converter and the sampling resistor R2.
Also be serially connected with transistor base current-limiting resistance R4 between the base stage of said PNP triode Q1 and the signal output part of D/A modular converter.
Also be serially connected with voltage follower between the signal output part of said transistor base current-limiting resistance R4 and D/A modular converter.
Said single-chip microcomputer also is connected with keyboard and display.
Also be serially connected with over-voltage and over-current and short-circuit protection module between said sampling resistor R3 and the load.
The beneficial effect that the utility model compared with prior art has is: the utility model has been realized the parallel connection use of Switching Power Supply; Solved the not enough problem of single switch output power of power supply; Adopt single-chip microcomputer can control the output current of parallel connection power supply flexibly to the adjusting of the adjusting of transistor base voltage and load resistance; Make two-way power supply output rated current, guarantee that the total current of supply load is stable; Adopt triode control load regulation good, power supply stability is strong, efficient is high, and current ratio control is flexible, and whole apparatus structure is simple, stable, cost is low; This device adopts adjustable ratio joint mode, as long as the multiple power supplies output voltage is identical, but the equal normal power supply of current-sharing or non-current-sharing makes range of application more extensive.
Description of drawings
Below in conjunction with accompanying drawing the embodiment of the utility model is done further detailed explanation:
Fig. 1 is the electrical block diagram of the utility model;
Among the figure: 1 is that first DC power supply, 2 is that second DC power supply, 3 is that a DC/DC modular converter, 4 is that the 2nd DC/DC modular converter, 5 is that single-chip microcomputer, 6 is that A/D modular converter, 7 is that D/A modular converter, 8 is that keyboard, 9 is that display, 10 is that over-voltage and over-current and short-circuit protection module, 11 are that load, 12 is a voltage follower.
Embodiment
A kind of parallel connection power supply electric supply installation of the utility model comprises: first DC power supply 1, second DC power supply 2, a DC/DC modular converter 3, the 2nd DC/DC modular converter 4, single-chip microcomputer 5, A/D modular converter 6, D/A modular converter 7, load 11, PNP triode Q1 and sampling resistor R1, R2, R3;
The output of said first DC power supply 1 links to each other with the input of a DC/DC modular converter 3, and the output of second DC power supply 2 links to each other with the input of the 2nd DC/DC modular converter 4;
The cathode output end of a said DC/DC modular converter 3 links to each other with the emitter of PNP triode Q1; The collector electrode of said PNP triode Q1 links to each other with the end of sampling resistor R1; The cathode output end of said the 2nd DC/DC modular converter 4 links to each other with the end of sampling resistor R2, the cathode output end of a DC/DC modular converter 3 and connect the cathode output end of the 2nd DC/DC modular converter 4 after ground connection; The other end of said sampling resistor R1 and connect the other end of sampling resistor R2 after link to each other the other end serial connection load 11 back ground connection of said sampling resistor R3 with the end of sampling resistor R3;
Said A/D modular converter 6 links to each other with the input of single-chip microcomputer 5; A/D modular converter 6 is gathered the last current/voltage value of sampling resistor R1, R2, R3 and is sent to single-chip microcomputer 5, and output serial connection D/A modular converter 7 backs of said single-chip microcomputer 5 link to each other with the base stage of PNP triode Q1.
Above-mentioned sampling resistor R1, R2 are responsible for gathering two electric currents on the power branch, and sampling resistor R3 is responsible for gathering total output current and the total output voltage after two power branch parallel connections.
TPS 5430 chips that adopt in an above-mentioned DC/DC modular converter 3 and the 2nd DC/DC modular converter 4 are the DC/DC conversion chip of non-isolation type, its input voltage range be 5.5V to 36V, can boost or the step-down conversion to two dc power supplies; Minimum output voltage is 1.2V, normally exports the 3A electric current, and current peak is 4A; Modular converter is under normal circumstances imported the direct current of 24V; The direct current of output 8V, 16W, this chip changing voltage efficient is high, can supply the input supply voltage wide ranges; Output current is big, can satisfy the demand of load 11.
Above-mentioned sampling resistor R1, R2, R3 need through an AD629 amplifier before signal is transferred to A/D modular converter 6, and the voltage of acquired signal is carried out 20 times of decay, prevent to damage single-chip microcomputer; The utility model converts the current/voltage analog quantity that collects into digital quantity through A/D modular converter 6 through sampling resistor R1, R2, R3 and sends into single-chip microcomputer 5; Single-chip microcomputer 5 carries out analytical calculation according to the rated current magnitude of voltage of connecing load 11; And the electric current that calculates exported to the base stage of PNP triode Q1; Collector electrode through PNP triode Q1 controls wherein the current value on the power branch; And then control the current value on another power branch, make total current output value stable, required rated current magnitude of voltage when satisfying load 11 work.
Also be serially connected with diode D1 between the collector electrode of said PNP triode Q1 and the sampling resistor R1, also be serially connected with diode D2 between the cathode output end of the 2nd DC/DC modular converter 4 and the sampling resistor R2; Add diode D1, D2 purpose and be and damage circuit when preventing that two electric currents on the power branch from occurring pouring in down a chimney phenomenon.
Also be serially connected with transistor base current-limiting resistance R4 between the base stage of said PNP triode Q1 and the signal output part of D/A modular converter 7; Add transistor base current-limiting resistance R4 and can reduce the load end electric current, prevent to damage PNP triode Q1.
Also be serially connected with voltage follower 12 between the signal output part of said transistor base current-limiting resistance R4 and D/A modular converter 7; Adding voltage follower 12 can improve the carrying load ability of D/A modular converter 7, and making D/A modular converter 7 send signal can driven PNP triode Q1.
Said single-chip microcomputer 5 also is connected with keyboard 8 and display 9; For guaranteeing that parallel connection power supply output suitable current voltage gives load 11, need that the current/voltage value of parallel connection power supply output is carried out ratio and amplify or reduce, this process can be through keyboard 8 controls; Keyboard 8 is provided with 4 buttons, is respectively to scale up, reduce in proportion, confirms and initialization; Keyboard 8 is to single-chip microcomputer 5 input regulation and control instruction, single-chip microcomputer 5 output control signal corresponding, and the current/voltage control through triode changes the current/voltage ratio ratio of two branch roads, reaches the required electric current and voltage value of load 11; Display 9 content displayed have: the ratio of each branch current, total branch road electric current, two branch currents and total output voltage.
Also be serially connected with over-voltage and over-current and short-circuit protection module 10 between said sampling resistor R3 and the load 11; Above-mentioned over-voltage and over-current and short-circuit protection module 10 can compare the total output current magnitude of voltage of device with single-chip microcomputer 5 predefined current/voltage threshold values; When short circuit or output current magnitude of voltage occurring above preset threshold; The inner metal-oxide-semiconductors of over-voltage and over-current and short-circuit protection module 10 can automatic disconnection, and circuit gets into guard mode, when output current voltage drops to threshold value when following; The automatic conducting of metal-oxide-semiconductor meeting of over-voltage and over-current and short-circuit protection module 10 inside, circuit returns to normal operating conditions; With the method protective circuit is convenient, reliable, cost is low, response is fast.
In the utility model: it is the DC/DC modular converter of TPS5430 that a DC/DC modular converter 3 and the 2nd DC/DC modular converter 4 adopt the chip model; It is the single-chip microcomputer of 80C51F320 that single-chip microcomputer 5 adopts the chip model; It is the A/D modular converter of AD7795 that A/D modular converter 6 adopts model; The model of D/A modular converter 7 is MAX512; It is the positive-negative-positive triode of TIP41C that PNP triode Q1 adopts model, and diode D1, D2 adopt Schottky diode, and it is the sampling resistor of 0.1 Ω 20W that sampling resistor R1, R2, R3 adopt specification.
Claims (6)
1. a parallel connection power supply electric supply installation comprises: first DC power supply (1), second DC power supply (2), a DC/DC modular converter (3), the 2nd DC/DC modular converter (4), single-chip microcomputer (5), A/D modular converter (6), D/A modular converter (7), load (11), PNP triode Q1 and sampling resistor R1, R2, R3; It is characterized in that: the output of said first DC power supply (1) links to each other with the input of a DC/DC modular converter (3), and the output of second DC power supply (2) links to each other with the input of the 2nd DC/DC modular converter (4);
The cathode output end of a said DC/DC modular converter (3) links to each other with the emitter of PNP triode Q1; The collector electrode of said PNP triode Q1 links to each other with the end of sampling resistor R1; The cathode output end of said the 2nd DC/DC modular converter (4) links to each other with the end of sampling resistor R2, the cathode output end of a DC/DC modular converter (3) and connect the cathode output end of the 2nd DC/DC modular converter (4) after ground connection; The other end of said sampling resistor R1 and connect the other end of sampling resistor R2 after link to each other other end serial connection load (11) the back ground connection of said sampling resistor R3 with the end of sampling resistor R3;
Said A/D modular converter (6) links to each other with the input of single-chip microcomputer (5); A/D modular converter (6) is gathered the last current/voltage value of sampling resistor R1, R2, R3 and is sent to single-chip microcomputer (5), and output serial connection D/A modular converter (7) back of said single-chip microcomputer (5) links to each other with the base stage of PNP triode Q1.
2. a kind of parallel connection power supply electric supply installation according to claim 1; It is characterized in that: also be serially connected with diode D1 between the collector electrode of said PNP triode Q1 and the sampling resistor R1, also be serially connected with diode D2 between the cathode output end of the 2nd DC/DC modular converter (4) and the sampling resistor R2.
3. a kind of parallel connection power supply electric supply installation according to claim 2 is characterized in that: also be serially connected with transistor base current-limiting resistance R4 between the signal output part of the base stage of said PNP triode Q1 and D/A modular converter (7).
4. a kind of parallel connection power supply electric supply installation according to claim 3 is characterized in that: also be serially connected with voltage follower (12) between the signal output part of said transistor base current-limiting resistance R4 and D/A modular converter (7).
5. a kind of parallel connection power supply electric supply installation according to claim 4 is characterized in that: said single-chip microcomputer (5) also is connected with keyboard (8) and display (9).
6. according to the arbitrary described a kind of parallel connection power supply electric supply installation of claim 1 to 5, it is characterized in that: also be serially connected with over-voltage and over-current and short-circuit protection module (10) between said sampling resistor R3 and the load (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220229898 CN202586343U (en) | 2012-05-22 | 2012-05-22 | Parallel power-source power unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220229898 CN202586343U (en) | 2012-05-22 | 2012-05-22 | Parallel power-source power unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202586343U true CN202586343U (en) | 2012-12-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220229898 Expired - Fee Related CN202586343U (en) | 2012-05-22 | 2012-05-22 | Parallel power-source power unit |
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| CN (1) | CN202586343U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104269842A (en) * | 2014-09-09 | 2015-01-07 | 株洲变流技术国家工程研究中心有限公司 | Direct-current supply device of control system |
| CN106331659A (en) * | 2016-11-12 | 2017-01-11 | 国网山西省电力公司忻州供电公司 | Video monitoring terminal |
| CN106385571A (en) * | 2016-11-12 | 2017-02-08 | 国网山西省电力公司忻州供电公司 | Video monitoring system |
| CN109904904A (en) * | 2017-12-08 | 2019-06-18 | 南京德朔实业有限公司 | Portable electric energy system |
| CN110635469A (en) * | 2019-10-12 | 2019-12-31 | 深圳市爱兰博功率电子有限公司 | Parallel power expansion circuit and method |
| WO2020102942A1 (en) * | 2018-11-19 | 2020-05-28 | 深圳迈瑞生物医疗电子股份有限公司 | Power supply device and ultrasonic trolley |
-
2012
- 2012-05-22 CN CN 201220229898 patent/CN202586343U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104269842A (en) * | 2014-09-09 | 2015-01-07 | 株洲变流技术国家工程研究中心有限公司 | Direct-current supply device of control system |
| CN104269842B (en) * | 2014-09-09 | 2016-12-07 | 株洲变流技术国家工程研究中心有限公司 | A kind of DC power supply apparatus of control system |
| CN106331659A (en) * | 2016-11-12 | 2017-01-11 | 国网山西省电力公司忻州供电公司 | Video monitoring terminal |
| CN106385571A (en) * | 2016-11-12 | 2017-02-08 | 国网山西省电力公司忻州供电公司 | Video monitoring system |
| CN109904904A (en) * | 2017-12-08 | 2019-06-18 | 南京德朔实业有限公司 | Portable electric energy system |
| WO2020102942A1 (en) * | 2018-11-19 | 2020-05-28 | 深圳迈瑞生物医疗电子股份有限公司 | Power supply device and ultrasonic trolley |
| CN110635469A (en) * | 2019-10-12 | 2019-12-31 | 深圳市爱兰博功率电子有限公司 | Parallel power expansion circuit and method |
| CN110635469B (en) * | 2019-10-12 | 2021-11-09 | 深圳市爱兰博功率电子有限公司 | Parallel power expansion circuit and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121205 Termination date: 20130522 |