CN203691272U - Single/three-phase wide range input switch power supply - Google Patents
Single/three-phase wide range input switch power supply Download PDFInfo
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- CN203691272U CN203691272U CN201320892545.9U CN201320892545U CN203691272U CN 203691272 U CN203691272 U CN 203691272U CN 201320892545 U CN201320892545 U CN 201320892545U CN 203691272 U CN203691272 U CN 203691272U
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Abstract
A single/three-phase wide range input switch power supply disclosed by the utility model comprises an input switching unit, and the input switching unit is connected with an input filtering unit, a high-frequency transformer and an output rectification filtering unit orderly via conducting wires. The high-frequency transformer is connected with a power supply unit and a PWM unit orderly via conducting wires, the output rectification filtering unit is connected with a feedback unit and the PWM unit orderly via conducting wires, and the PWM unit is connected with a power metal oxide semiconductor (MOS) and the high-frequency transformer orderly via conducting wires. The switch power supply of the utility model has the single-phase power supply/single-phase power supply switching output function, namely, can provide the stable DC power supply regardless of the input being single-phase input or three-phase input. The range of a single-phase input AC voltage reaches AC 85 to 456V. Based on a current mode PWM type control chip, the single/three-phase wide range input switch power supply possesses an overvoltage/undervoltage protection function, a peak current limiting function and a temperature detection function, thereby protecting the power MOS very well.
Description
Technical field
The utility model belongs to power supply unit technical field, relates to a kind of Switching Power Supply, is specifically related to a kind of single three-phase width range input switch power supply.
Background technology
Along with the high speed development of power electronic technology, nowadays power electronic equipment and people's work, live closely bound uply, and electronic equipment all be unable to do without reliable power supply.
Switching Power Supply is to utilize modern power electronics technology, and the time ratio that control switch pipe turns on and off maintains a kind of power supply of regulated output voltage.Switching Power Supply generally controls IC by pulse width modulation (PWM) and MOSFET forms.At present, Switching Power Supply, with small-sized, light weight and high efficiency feature nearly all electronic equipment that is widely used, is the indispensable a kind of power mode of current electronics and information industry develop rapidly.But current most Switching Power Supplies are generally single phase alternating current (A.C.) inputs, scope is AC85～264V, the shortcoming of this power supply architecture is: (1) is input as single phase alternating current (A.C.) input, once this alternating current breaks down, whole Switching Power Supply degradedness supply, has not also just exported; (2) input range of this power supply is only 1:3, and wider input voltage is just no longer applicable.Therefore, existing power supply exists the shortcoming that power supply reliability is not high enough and input range is little.
Utility model content
The purpose of this utility model is to provide a kind of single three-phase wide region input switch power supply, effectively raises the reliability of power supply, has widened voltage input voltage range.
The technical scheme that the utility model adopts is, single three-phase wide region input switch power supply, include input switch unit, input switch unit is connected with input filter unit, high frequency transformer and output rectification filter unit successively by wire, high frequency transformer is connected with power supply unit, PWM unit successively by wire, output rectification filter unit is connected with feedback unit, PWM unit successively by wire, and PWM unit is connected with MOS, high frequency transformer successively by wire.
Feature of the present utility model is also,
Input filter unit is made up of two capacitances in series.
Two electric capacity are the electric capacity of 100uF, 400V.
High frequency transformer is the flyback transformer of single input, dual output.
That MOS adopts is FQA8N100C.
The chip adopting in PWM unit is SG5841 chip.
The beneficial effects of the utility model are:
(1) single three-phase wide region input switch power supply of the present utility model, its input adopts AC three-phase four-wire system, can single-phase/three-phase work under the super wide range voltage of AC85～456V.
(2) single three-phase wide region input switch power supply of the present utility model, through experimental verification, its dependable performance, efficiency are high, low price, switching are effective.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of single three-phase wide region input switch power supply of the present utility model.
Fig. 2 is the circuit diagram of inputting switch unit in single three-phase wide region input switch power supply of the present utility model.
Fig. 3 is input filter element circuit figure in single three-phase wide region input switch power supply of the present utility model.
In figure, 1. input switch unit, 2. input filter unit, 3. high frequency transformer, 4. output rectification filter unit, 5. feedback unit, 6. MOS, 7. power supply unit, 8.PWM unit.
Embodiment
Below in conjunction with concrete the drawings and specific embodiments, the utility model is elaborated:
Single three-phase wide region input switch power supply of the present utility model, its circuit connects as shown in Figure 1, include input switch unit 1, input switch unit 1 is connected with input filter unit 2, high frequency transformer 3 and output rectification filter unit 4 successively by wire, high frequency transformer 3 is connected with power supply unit 7, PWM unit 8 successively by wire, output rectification filter unit 4 is connected with feedback unit 5, PWM unit 8 successively by wire, and PWM unit 8 is connected with MOS 6, high frequency transformer 3 successively by wire.
Wherein, input filter unit 2 is made up of two 100uF400V capacitances in series;
High frequency transformer 3 is the flyback transformers by single armature winding and two secondary winding;
That MOS 6 adopts is FQA8N100C;
The chip adopting in PWM unit 8 is SG5841 chip.
Effect and the operation principle of each parts in single three-phase width range input switch power supply of the present utility model:
Input switch unit 1, as shown in Figure 2, input switch unit 1 is made up of D1, D4 and D5, form Half bridge rectifier, after over commutation, obtain pulsating wave from the interchange point of input terminal input, connect right in the situation that at N line, when in four lines of 220V input any one while having mutually electricity, two-phase to have electricity or three-phase to have electricity, the pulsating wave peak value after rectification is input 311V; The in the situation that of N line wrong, when any one having mutually electricity in four lines of 220V input, the pulsating wave peak value after rectification is 311V or 537V; In the time that in four lines of 220V input, any two-phase or three-phase all have electricity, the pulsating wave peak value after rectification is 537V.
Therefore whether wrong, has electricity, two-phase to have electricity or three-phase to have electricity to four lines of no matter inputting mutually, and the utility model all can provide reliable electric power supply.
High frequency transformer 3, as shown in Figure 1, high frequency transformer 3 is flyback transformers of single input, dual output, is made up of EI type ferrite magnetic core, skeleton and copper cash, it realizes the transmission of energy on the one hand, on the other hand input, output is carried out to electrical isolation.
Output rectification filter unit 4, plays the effect of rectification and filtering.Wherein, Schottky type diode is as output rectifier part, in 6 conduction periods of MOS, reverse blocking capacitor discharge, MOS 6 by during, to being delivered to the voltage commutation of transformer auxiliary winding; The voltage of electrochemical capacitor after to rectification carries out filtering and energy storage; L and C play the effect of rear class filtering, effectively eliminate ripple in output voltage.
Feedback unit 5, as shown in Figure 1, take PC817 and TL431 as core, feedback circuit feeds back to PWM unit 8 by output voltage signal on the one hand, on the other hand the output feedback signal of telecommunication and input are carried out to electrical isolation, jointly realize the output of Switching Power Supply and the isolation completely of input with high frequency transformer 3.
MOS 6(is power MOS pipe), as shown in Figure 1, be N-channel MOS FET, that in the utility model, adopt is FQA8N100C, is characterized in that conducting, turn-off time are short, and conducting resistance is little, can meet the restriction requirement to turn-on and turn-off loss, realize high frequency control.
8(PWM unit, PWM unit is pulse width modulation), be take SG5841 chip as core, SG5841 chip is as Converter Controlled by Current mode PWM device; move low in energy consumption; programmable frequency, has overvoltage and under-voltage protection to supply power voltage, has peak current limit, temperature limiting simultaneously.Its grid driver output is totem pillar output, directly driving power MOS6 and without driving separately chip.
Single three-phase wide region input switch power supply of the present utility model is mainly made up of input switch unit 1, input filter unit 2, high frequency transformer 3, output rectification filter unit 4, feedback unit 5, MOS 6, power supply unit 7 and PWM unit 8.The new single three-phase wide region input switch power supply of this practicality is the reverse exciting switching voltage regulator that three-phase four-wire system input, voltage range are AC85～456V, and through test, input voltage range can reach AC85～456V, and single-phase or three-phase input all can normally be worked; Initial launch, in the time of three phase supply, can be switched to rapidly single phase power supply in the situation that of the another unexpected power-off of two-phase, does not affect power stage.
Switching Power Supply of the present utility model has single phase power supply/single phase power supply and switches output function; no matter input single-phase input or three-phase input; stable direct current supply all can be provided; the scope of single-phase input ac voltage is up to AC85～456V; adopt current mode PWM type control chip; there is overvoltage/under-voltage protection function, peak current limit function, temperature detecting function, well protected MOS.
Claims (6)
1. single three-phase wide region input switch power supply, it is characterized in that, include input switch unit (1), described input switch unit (1) by wire successively with input filter unit (2), high frequency transformer (3) and output rectification filter unit (4) connect, described high frequency transformer (3) by wire successively with power supply unit (7), PWM unit (8) connects, described output rectification filter unit (4) by wire successively with feedback unit (5), described PWM unit (8) connects, described PWM unit (8) by wire successively with MOS (6), described high frequency transformer (3) connects.
2. single three-phase wide region input switch power supply according to claim 1, is characterized in that, described input filter unit (2) is made up of two capacitances in series.
3. single three-phase wide region input switch power supply according to claim 2, is characterized in that, described two electric capacity are the electric capacity of 100uF, 400V.
4. single three-phase wide region input switch power supply according to claim 1, is characterized in that, described high frequency transformer (3) is the flyback transformer of single input, dual output.
5. single three-phase wide region input switch power supply according to claim 1, is characterized in that, that described MOS (6) adopts is FQA8N100C.
6. single three-phase wide region input switch power supply according to claim 1, is characterized in that, the chip adopting in described PWM unit (8) is SG5841 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320892545.9U CN203691272U (en) | 2013-12-31 | 2013-12-31 | Single/three-phase wide range input switch power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320892545.9U CN203691272U (en) | 2013-12-31 | 2013-12-31 | Single/three-phase wide range input switch power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203691272U true CN203691272U (en) | 2014-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320892545.9U Expired - Fee Related CN203691272U (en) | 2013-12-31 | 2013-12-31 | Single/three-phase wide range input switch power supply |
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| CN (1) | CN203691272U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109494997A (en) * | 2018-12-29 | 2019-03-19 | 云南电网有限责任公司电力科学研究院 | A kind of high frequency switch power based on MOSFET pipe |
| CN113765103A (en) * | 2021-09-15 | 2021-12-07 | 国网浙江省电力有限公司舟山供电公司 | Low-voltage remote distributed weak power supply system |
-
2013
- 2013-12-31 CN CN201320892545.9U patent/CN203691272U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109494997A (en) * | 2018-12-29 | 2019-03-19 | 云南电网有限责任公司电力科学研究院 | A kind of high frequency switch power based on MOSFET pipe |
| CN113765103A (en) * | 2021-09-15 | 2021-12-07 | 国网浙江省电力有限公司舟山供电公司 | Low-voltage remote distributed weak power supply system |
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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: 20140702 Termination date: 20161231 |