CN105515351A - Multi-output power supply - Google Patents
Multi-output power supply Download PDFInfo
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- CN105515351A CN105515351A CN201510960121.5A CN201510960121A CN105515351A CN 105515351 A CN105515351 A CN 105515351A CN 201510960121 A CN201510960121 A CN 201510960121A CN 105515351 A CN105515351 A CN 105515351A
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/10—Arrangements incorporating converting means for enabling loads to be operated at will from different kinds of power supplies, e.g. from ac or dc
Abstract
The invention discloses a multi-output power supply comprising an input unit, a main power conversion unit, a multi-output rectifier and filter unit and a control and feedback unit. The input unit is used for converting external 220V alternating current into direct current, and the output end of the input unit is connected with the input end of the main power conversion unit. The main power conversion unit is used for transforming the voltage of the input direct current into multiple voltages of different values, and the output end of the main power conversion unit is connected with the input end of the multi-output rectifier and filter unit. The multi-output rectifier and filter unit includes +24V, +15V, -15V and +5V outputs and corresponding filter circuits, and the output end of the +24V output circuit is connected with the input end of the control and feedback unit. The output end of the control and feedback unit is connected with the input end of the main power conversion unit. The number of power supplies is reduced and the hardware cost is lowered under the condition of same output voltage and power.
Description
Technical field
The present invention relates to a kind of multiple-output electric power.
Background technology
Along with the development in epoch, nearly all industry is all completely electrified.In a lot of application scenario, power supply carries the power supply task providing signal, control, sensor system, requires within 24 hours, work incessantly.These occasions are generally electrical network and exchange input or DC bus powered, and the supply power mode as required in chip, display unit, blower fan etc. of load mostly is low-voltage direct, and direct voltage required for different loads is different, conventional electric pressure has 5V, 12V, 15V, 24V, 48V etc.
The output of multichannel low-voltage direct is turned in order to realize single channel voltage (exchanging or direct current) input, existing conventional method is multi-stage transformation, the AC-DC module power supply of first order relatively high power or DC-DC power source obtain the stable low-voltage direct of one-level, and the second level realizes multi-channel DC voltage by multiple small-power DC-DC module power source and exports on first order low-voltage direct bus basis.With the commercially available active filter (ActivePowerFilter of one, APF) module is example, the total harmonic current compensation ability of module is 75A, wherein employ altogether 5 pieces of modular power sources and carry out the power supplies such as fan, driving, chip, display screen, comprise the AC-DC power supply of a 120W, 2 24V turn 15V, power output is the DC-DC power source of 15W, and the DC-DC power source that 1 24V turns 15V, power output is 20W and 24V turn 5V, power output is the DC-DC power source of 10W.These power supply products are complete, are easy to buy, and this implementation is also that the product development initial stage is comparatively conveniently a kind of.But favourable also have fraud, multiple power supply is used to bring some problems.First be take up room comparatively large, little module power supply needs to be welded on the PCB space of a whole page usually, occupies layout space, and AC-DC power supply often volume is comparatively large, whole power unit needs larger space to place.Second is that power supply purchase cost is higher.In upper example, single AC-DC power supply procurement price is usually at 100 yuan to 150 yuan, and single DC-DC power module procurement price is usually between 50 to 70 yuan, and the procurement price of whole power unit is more than 300 yuan.3rd is that the increase of power module quantity also improves probability of malfunction, and later maintenance difficulty is high.
Summary of the invention
The technical problem to be solved in the present invention is in existing technology, and multi-channel DC voltage exports needs multiple power supply.
For solving the problems of the technologies described above, the technical scheme that the present invention takes is: a kind of multiple-output electric power, comprises input unit, main power conversion unit, multiple-channel output rectification filtering unit and control and feedback unit; It is direct current that described input unit is used for external 220V AC conversion, and its output connects the input of main power conversion unit; Main power conversion unit is used for the voltage transferring multichannel different value after the direct current transformation of input to, and its output connects the input of multiple-channel output rectification filtering unit; Multiple-channel output rectification filtering unit comprise+24V ,+15V ,-15V and+5V four tunnel export and corresponding circuits, and the input of the output connection control of+24V output circuit and feedback unit; The output of control and feedback unit connects the input of main power conversion unit.
The AC-DC power supply and the rear class multichannel DC-DC power source thereof that the present invention is directed to the 120W needed in a Active Power Filter-APF (ActivePowerFilter, APF) or reactive-load compensator (StaticVarGenerator, SVG) module design.Because the overall structure of APF or SVG module is shaped, therefore the volume of this power supply and shape are subject to certain spatial limitation.The present invention's AC-DC power supply that a plurality of voltages exports instead of an original AC-DC power supply and rear class multichannel DC-DC power source thereof, simplifies electric power system, reduces power unit hardware cost.
Further, input unit comprises input rectification circuit and DC bus filter circuit, and input voltage is single-phase 220V alternating current; Input rectification circuit adopts single-phase rectification bridge, and for converting alternating current to direct current, its output connects the input of DC bus filter circuit; The jumbo electrochemical capacitor that DC bus filter circuit adopts two to connect, for carrying out filtering to the direct current after rectifier bridge rectification, obtains stable input direct-current busbar voltage Vin.Obtain galvanic current by input unit, the power supply of system is stablized.
Further, main power conversion unit comprises switching circuit and transformer; Switching circuit comprises two metal-oxide-semiconductor field effect t MOSFET and MOSFET drive circuit; Described MOSFET adopts double-transistor flyback topology, and namely two MOSFET are connected in series, two termination input direct-current busbar voltage Vin, alternate conduction, and half work period of each conducting, switching frequency is 65kHz; MOSFET is positioned at below pcb board, is connected with screw by insulation spacer with shape radiator; MOSFET drive circuit is for receiving and the drive singal that provides of the control chip amplifying peripheral hardware export to MOSFET; Transformer has multiple winding, and the winding that transformer is connected with MOSFET is former limit winding, and the winding that transformer is connected with three rectifying tubes is that secondary exports winding, output+24V ,+15V and-15V three road voltage respectively; + 24V road is auxiliary power supply winding, provides direct current supply for the main control chip for peripheral hardware; Transformer employing EE40 type ferrite magnetic core and supporting skeleton, adopt outer plating paint copper cash and enamelled wire coiling former limit winding, secondary output winding and auxiliary power supply winding.Select this circuit, cost of manufacture is low, effective, and structure is simple, be convenient to produce, good heat dissipation effect, the wind-cooling heat dissipating mode of employing, reduce temperature rise than traditional natural heat dissipation mode and on average reach 10 DEG C to 20 DEG C, thus the reliability and stability of hardware can be improved, extend useful life.
Further, in described multiple-channel output rectification filtering unit :+24V output circuit comprises rectifier diode, output filter circuit, power supply indication LED lamp and the output plug terminal of connecting successively; Output filter circuit adopts the composite type filter structure of electric capacity-inductance-electric capacity; + 15V output circuit comprises rectifier diode, voltage stabilizing chip, output filter circuit, power supply indication LED lamp and the output plug terminal of connecting successively; Output filter circuit adopts the composite type filter structure of electric capacity-inductance-electric capacity;-15V output circuit comprises rectifier diode, voltage stabilizing chip, output filter circuit, power supply indication LED lamp and the output plug terminal of connecting successively; Output filter circuit adopts capacitor filtering; + 5V output circuit comprises voltage stabilizing chip in sequential series, output filter circuit, power supply indication LED lamp and exports plug terminal, and voltage stabilizing chip is exported by+15V and powers to it, and output filter circuit adopts the composite type filter structure of electric capacity-inductance-electric capacity; + 5V ,-15V and+15V export and share an output plug terminal.Replace small power supply of the prior art by voltage stabilizing chip, such that circuit is simple, cost reduces further, and volume reduces a lot, placement easy to use.
Further, control and feedback unit comprise control circuit, feedback circuit and protective circuit; Control circuit adopts UC2845 chip, exports control signal to the MOSFET drive circuit of main power conversion unit; Input sampling+24V the output voltage of feedback circuit, voltage signal is fed back to control circuit by output; Protective circuit comprises current foldback circuit, output overvoltage protection circuit and output short circuit protection circuit; current foldback circuit sampling MOSFET electric current; the output voltage of output overvoltage protection circuit sampling feedback circuit; the output current of output short circuit protection circuit sampling feedback circuit, the output of protective circuit connect and the signal transmission that aforementioned sample is obtained to control circuit.This design by sampling MOSFET electric current, output current and output voltage, feedback protection signal to control circuit, the protection of realizing circuit, further extension fixture useful life.
Advantage of the present invention is: can realize under same output voltage and power, reduces number of power sources, reduces hardware cost.Pass through contrast experiment, the wind-cooling heat dissipating mode that the present invention adopts, lower than traditional natural heat dissipation mode temperature rise, the temperature rise of wind-cooling heat dissipating only has 10 DEG C to 20 DEG C (in these power supplys of natural heat dissipation temperature rise through experimental test generally at about 40 DEG C), thus the reliability and stability of hardware can be improved, extend useful life.
Accompanying drawing explanation
Fig. 1 is power principle block diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the technology of the present invention content is explained:
The present invention includes PCB, components and parts, radiator three kinds of critical pieces.Components and parts are installed in order and is welded on PCB, and install radiator additional on MOSFET ,+24V rectifying tube ,+15V rectifying tube and voltage stabilizing chip ,-15V rectifying tube and voltage stabilizing chip, the production work of power supply can be completed.
As shown in Figure 1, main body of the present invention is a power supply, comprises importation, main power conversion part, multiple-channel output rectifying and wave-filtering part and control and feedback fraction.Relation between each several part is as shown in Fig. 1 power principle block diagram.
Importation comprises input rectification circuit and DC bus filter circuit, and input voltage is single-phase 220V alternating current.Input rectification circuit adopts single-phase rectification bridge that AC rectification is become direct current.The jumbo electrochemical capacitor that DC bus filter circuit adopts two to connect carries out filtering to the direct current after rectifier bridge rectification, obtains stable input direct-current busbar voltage Vin.
Main power conversion part comprises switching circuit and transformer.Switching circuit have employed double-transistor flyback topology, two metal-oxide-semiconductor field effect t (Medal-Oxide-SemiconductorField-EffectTransistor, MOSFET) be connected in series, two termination input direct-current busbar voltage Vin, alternate conduction, half work period of each conducting, switching frequency is 65kHz.Two MOSFET adopt wind-cooling heat dissipating, are placed on below printed circuit board (PrintedCircuitBoard, PCB) plate, are connected by insulation spacer with screw with shape radiator, and radiator is that MOSFET improves heat dispersion.Switching circuit also comprises the drive circuit of MOSFET, is used for receiving and amplifies drive singal that control chip provides and export to MOSFET.
Transformer has multiple winding, and the winding be connected with MOSFET is former limit winding; The winding be connected with three rectifying tubes is that secondary exports winding, output+24V ,+15V and-15V three road voltage respectively; + 24V road is auxiliary power supply winding, for main control chip provides direct current supply.Transformer employing EE40 type ferrite magnetic core and supporting skeleton, adopt outer plating paint copper cash and enamelled wire coiling former limit winding, secondary output winding and auxiliary power supply winding.
Multiple-channel output rectification filtering part divide comprise+24V ,+15V ,-15V and+5V four tunnel export and corresponding circuits.
+ 24V output circuit comprises rectifier diode, output filter circuit, power supply indication LED lamp and exports plug terminal.Rectifier diode is placed on below PCB, is connected with screw by insulation spacer with shape radiator, and radiator is that rectifier diode improves heat dispersion.+ 24V rectifier diode is the same with MOSFET, adopts wind-cooling heat dissipating.Output filter circuit adopts the composite type filter structure of electric capacity-inductance-electric capacity.Whether LED instruction power supply+24V exports.Export plug terminal and adopt the flanged screw locking terminal of 5.08mm spacing 2PIN.
+ 15V output circuit comprises rectifier diode, voltage stabilizing chip, output filter circuit, power supply indication LED lamp and exports plug terminal.Rectifier diode is placed on PCB front, is connected with screw by insulation spacer with shape radiator, naturally cools.Voltage stabilizing chip is placed on PCB front, is connected with screw by insulation spacer with shape radiator, naturally cools.Output filter circuit adopts the composite type filter structure of electric capacity-inductance-electric capacity.Whether LED instruction power supply+15V exports.Export plug terminal and the shared flanged screw locking terminal of 5.08mm spacing 5PIN of-15V and+5V.
-15V output circuit comprises rectifier diode, voltage stabilizing chip, output filter circuit, power supply indication LED lamp and exports plug terminal.Rectifier diode is placed on PCB front, is connected with screw by insulation spacer with shape radiator, naturally cools.Voltage stabilizing chip is placed on PCB front, is connected with screw by insulation spacer with shape radiator, naturally cools.Output filter circuit adopts capacitor filtering.Whether LED instruction power supply-15V exports.Export plug terminal and the shared flanged screw locking terminal of 5.08mm spacing 5PIN of+15V and+5V.
+ 5V output circuit comprises voltage stabilizing chip, output filter circuit, power supply indication LED lamp and exports plug terminal.Voltage stabilizing chips welding, in PCB front, is exported by+15V and powers to it.Output filter circuit adopts the composite type filter structure of electric capacity-inductance-electric capacity.Whether LED instruction power supply+5V exports.Export plug terminal and the shared flanged screw locking terminal of 5.08mm spacing 5PIN of+15V ,-15V.
Control and feedback fraction comprise control circuit, feedback circuit and protective circuit.Wherein control circuit adopts UC2845 chip, exports control signal, by drive circuit to MOSFET.Feedback circuit sampling+24V output voltage, and feed back to control circuit.Protective circuit comprises overcurrent protection (OverCurrentProtection; OCP); output over-voltage protection (OverVoltageProtection; OVP); output short circuit protection (ShortCircuitProtection, SCP), by sampling MOSFET electric current, output current and output voltage; feedback protection signal, to control circuit, realizes protection.
Claims (5)
1. a multiple-output electric power, is characterized in that: comprise input unit, main power conversion unit, multiple-channel output rectification filtering unit and control and feedback unit;
It is direct current that described input unit is used for external 220V AC conversion, and its output connects the input of main power conversion unit;
Main power conversion unit is used for the voltage transferring multichannel different value after the direct current transformation of input to, and its output connects the input of multiple-channel output rectification filtering unit;
Multiple-channel output rectification filtering unit comprise+24V ,+15V ,-15V and+5V four tunnel export and corresponding circuits, and the input of the output connection control of+24V output circuit and feedback unit;
The output of control and feedback unit connects the input of main power conversion unit.
2. a kind of multiple-output electric power according to claim 1, is characterized in that: input unit comprises input rectification circuit and DC bus filter circuit, and input voltage is single-phase 220V alternating current; Input rectification circuit adopts single-phase rectification bridge, and for converting alternating current to direct current, its output connects the input of DC bus filter circuit; The jumbo electrochemical capacitor that DC bus filter circuit adopts two to connect, for carrying out filtering to the direct current after rectifier bridge rectification, obtains stable input direct-current busbar voltage Vin.
3. a kind of multiple-output electric power according to claim 1 and 2, is characterized in that: main power conversion unit comprises switching circuit and transformer;
Switching circuit comprises two metal-oxide-semiconductor field effect t MOSFET and MOSFET drive circuit; Described MOSFET adopts double-transistor flyback topology, and namely two MOSFET are connected in series, two termination input direct-current busbar voltage Vin, alternate conduction, and half work period of each conducting, switching frequency is 65kHz; MOSFET is positioned at below pcb board, is connected with screw by insulation spacer with shape radiator; MOSFET drive circuit is for receiving and the drive singal that provides of the control chip amplifying peripheral hardware export to MOSFET;
Transformer has multiple winding, and the winding that transformer is connected with MOSFET is former limit winding, and the winding that transformer is connected with three rectifying tubes is that secondary exports winding, output+24V ,+15V and-15V three road voltage respectively; + 24V road is auxiliary power supply winding, provides direct current supply for the main control chip for peripheral hardware; Transformer employing EE40 type ferrite magnetic core and supporting skeleton, adopt outer plating paint copper cash and enamelled wire coiling former limit winding, secondary output winding and auxiliary power supply winding.
4. a kind of multiple-output electric power according to claim 1 and 2, is characterized in that: in described multiple-channel output rectification filtering unit:
+ 24V output circuit comprises rectifier diode, output filter circuit, power supply indication LED lamp and the output plug terminal of connecting successively; Output filter circuit adopts the composite type filter structure of electric capacity-inductance-electric capacity;
+ 15V output circuit comprises rectifier diode, voltage stabilizing chip, output filter circuit, power supply indication LED lamp and the output plug terminal of connecting successively; Output filter circuit adopts the composite type filter structure of electric capacity-inductance-electric capacity;
-15V output circuit comprises rectifier diode, voltage stabilizing chip, output filter circuit, power supply indication LED lamp and the output plug terminal of connecting successively; Output filter circuit adopts capacitor filtering;
+ 5V output circuit comprises voltage stabilizing chip in sequential series, output filter circuit, power supply indication LED lamp and exports plug terminal, and voltage stabilizing chip is exported by+15V and powers to it, and output filter circuit adopts the composite type filter structure of electric capacity-inductance-electric capacity;
+ 5V ,-15V and+15V export and share an output plug terminal.
5. a kind of multiple-output electric power according to claim 3, is characterized in that: control and feedback unit comprise control circuit, feedback circuit and protective circuit;
Control circuit adopts UC2845 chip, exports control signal to the MOSFET drive circuit of main power conversion unit; Input sampling+24V the output voltage of feedback circuit, voltage signal is fed back to control circuit by output;
Protective circuit comprises current foldback circuit, output overvoltage protection circuit and output short circuit protection circuit; current foldback circuit sampling MOSFET electric current; the output voltage of output overvoltage protection circuit sampling feedback circuit; the output current of output short circuit protection circuit sampling feedback circuit, the output of protective circuit connect and the signal transmission that aforementioned sample is obtained to control circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510960121.5A CN105515351A (en) | 2015-12-21 | 2015-12-21 | Multi-output power supply |
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| CN201510960121.5A CN105515351A (en) | 2015-12-21 | 2015-12-21 | Multi-output power supply |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106992697A (en) * | 2017-05-09 | 2017-07-28 | 南阳理工学院 | A kind of improvement device of switch power source of industrial control computer |
| CN108045332A (en) * | 2017-12-15 | 2018-05-18 | 东风汽车电子有限公司 | A kind of Big Dipper is compatible with board information terminal |
| CN108092494A (en) * | 2017-11-23 | 2018-05-29 | 深圳市思创华源科技有限公司 | A kind of multifunction power power supply |
| CN108879899A (en) * | 2018-06-12 | 2018-11-23 | 深圳市华禹无线供电技术有限公司 | Detect communication device and wireless charging system for electric automobile |
| WO2019056178A1 (en) * | 2017-09-19 | 2019-03-28 | 深圳配天智能技术研究院有限公司 | Servo drive switch power supply and servo drive |
| CN109687694A (en) * | 2019-01-21 | 2019-04-26 | 温州大学 | A kind of multiple power supplies are for being electrically integrated assembly and its control method |
| CN109947022A (en) * | 2019-03-28 | 2019-06-28 | 合肥新胜电达电子科技有限公司 | Terahertz detection system power supply |
| CN110729704A (en) * | 2018-07-17 | 2020-01-24 | 东芝存储器株式会社 | Power supply device, control method of power supply circuit, and storage device |
| CN112564510A (en) * | 2020-11-26 | 2021-03-26 | 中国核动力研究设计院 | Low-voltage power supply for out-of-pile nuclear instrument system simulation component and application method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106992697A (en) * | 2017-05-09 | 2017-07-28 | 南阳理工学院 | A kind of improvement device of switch power source of industrial control computer |
| WO2019056178A1 (en) * | 2017-09-19 | 2019-03-28 | 深圳配天智能技术研究院有限公司 | Servo drive switch power supply and servo drive |
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| CN108045332A (en) * | 2017-12-15 | 2018-05-18 | 东风汽车电子有限公司 | A kind of Big Dipper is compatible with board information terminal |
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| CN112564510A (en) * | 2020-11-26 | 2021-03-26 | 中国核动力研究设计院 | Low-voltage power supply for out-of-pile nuclear instrument system simulation component and application method thereof |
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