CN205123587U - Switching power supply of super wide region input - Google Patents
Switching power supply of super wide region input Download PDFInfo
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- CN205123587U CN205123587U CN201520968660.9U CN201520968660U CN205123587U CN 205123587 U CN205123587 U CN 205123587U CN 201520968660 U CN201520968660 U CN 201520968660U CN 205123587 U CN205123587 U CN 205123587U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
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Abstract
The utility model relates to a switching power supply of super wide region input, including input rectification filter circuit, power control chip U1, line voltage detection circuit, transformer, output Rectifier filter circuit and output sampling circuit, rectification filter circuit's output with power control chip U1's output is connected to respectively the primary side of transformer, output Rectifier filter circuit is connected to the secondary end of transformer, output Rectifier filter circuit's output is connected adapter output voltage sampling circuit, adapter output voltage sampling circuit's output is connected to on the power control chip U1, line voltage detection circuit sets up power control chip U1 with between the input rectification filter circuit. The utility model is suitable for a wind -force or solar energy power generation electromagnetic controller's switching power supply, its direct -current input scope can reach 20-190V, and input voltage range is than being 9.5: 1.
Description
Technical field
The utility model relates to a kind of switching power circuit, the Switching Power Supply of specifically a kind of super wide range input.
Background technology
Along with the extensive application of Switching Power Supply, its requirement is also constantly being improved, requiring that its efficiency is high, power factor is high, power density is high, reliability is being high etc.When require Switching Power Supply can adapt to input voltage on a large scale change or more severe when still can normally work time, just must improve Switching Power Supply, at present, by improving the Switching Power Supply utilizing TOPSswitch to design, input voltage can be expanded to interchange 80 to 265 volt, but be less than 80 volts for input voltage, even reach when lying prostrate 30, the research of this respect is also fewer more.
The design of the Switching Power Supply of wide region is an industry difficult problem always.For the power supply that input voltage range is wider, generally adopt circuit of reversed excitation, AC/DC typically can accomplish 85 ~ 265V, and with TOP or add pfc circuit above and all can realize, other Switching Power Supply also has and adopts booster circuit to add circuit of reversed excitation to realize.For the Switching Power Supply of compatible DC and AC two kinds of input patterns, due to should not the circuit such as PFC be adopted, therefore, the input realizing super wide range is never solved well.
Utility model content
The purpose of this utility model is just to provide the Switching Power Supply of a kind of super wide range input, is difficult to accomplish the problem of super wide range input pattern with the Switching Power Supply solving compatible DC and AC two kinds of input patterns.
The utility model is achieved in that the Switching Power Supply that a kind of super wide range inputs, and comprises input rectifying filter circuit, power supply control chip U1, line voltage detecting circuit, transformer, output rectifier and filter and electric power output voltage sample circuit;
The output of described current rectifying and wave filtering circuit connects power supply control chip U1, the output of described power supply control chip U1 connects the primary side of described transformer, the secondary end of described transformer connects output rectifier and filter, the output of described output rectifier and filter connects described electric power output voltage sample circuit, the output of described electric power output voltage sample circuit is connected on described power supply control chip U1, and described line voltage detecting circuit is arranged between described power supply control chip U1 and described input rectifying filter circuit.
Described input rectifying filter circuit comprises: the ac filter circuit be made up of electric capacity C1, electric capacity C2 and inductance L 1, the ductility limit regulating circuit be composed in series by resistance R2 and resistance R3, and the absorbing circuit be made up of diode D1, TVS diode D5, resistance R1 and electric capacity C3; Also comprise rectifier bridge Q1 and DC filter capacitor CD1;
The output of described ac filter circuit connects rectifier bridge Q1, DC filter capacitor CD1 is connected in the output of rectifier bridge Q1 in parallel, described ductility limit regulating circuit is connected in the two ends of DC filter capacitor CD1 in parallel, in described ductility limit regulating circuit, the intermediate node of resistance R2 and resistance R3 is connected to the outside ductility limit adjustable side 3X of described power supply control chip U1, and described absorbing circuit is connected between one end of DC filter capacitor CD1 and the drain electrode end 7D of described power supply control chip U1.
Described line voltage detecting circuit comprises resistance R4, resistance R5 and voltage-stabiliser tube Z1, resistance R4 and voltage-stabiliser tube Z1 forms series arm, this series arm is connected in parallel on the two ends of DC filter capacitor CD1, and the intermediate node of resistance R4 and voltage-stabiliser tube Z1 meets the wireline inspection end 2L of described power supply control chip U1 through resistance R5.
Described electric power output voltage sample circuit comprises resistance R6 ~ R10, electric capacity C7, three end adjustable shunt reference source U2 and optocoupler GO1, for output sampled signal to be transported to the control end 1C of power supply control chip U1 by optocoupler GO1, to realize the stable output of power supply.
Wide input voltage range of the present utility model, can normally work in the scope from DC20V to AC135V.Circuit is simple, cost is low.The utility model make use of the excellent function of TOP249Y chip; peripheral components is few; powerful, meet the use needs of specific occasion to Switching Power Supply well, and there is the defencive functions such as under-voltage protection, line voltage detecting, the adjustment of outside ductility limit and the recovery of sluggish Thermal shutdown automatic fault.
The utility model is specially adapted to the Switching Power Supply of wind-force or solar power generation electromagnetic controller, and it exports as 3.3V/4A, for the ME for maintenance after electromagnetic contactor adhesive.Input direct voltage scope is DC40 ~ 60V, exchanges scope AC45 ~ 135V, still can maintain normal work when power supply drops to 20 ~ 40V by normal input voltage.Therefore, direct current input range of the present utility model can reach 20 ~ 190V, and input voltage range ratio is 9.5 ﹕ 1.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
As shown in Figure 1, the utility model comprises input rectifying filter circuit, power supply control chip U1, line voltage detecting circuit, transformer, output rectifier and filter and electric power output voltage sample circuit.
Input rectifying filter circuit comprises: the ac filter circuit be made up of electric capacity C1, electric capacity C2 and inductance L 1, the outside ductility limit regulating circuit be composed in series by resistance R2 and resistance R3, and the absorbing circuit be made up of diode D1, TVS diode D5, resistance R1 and electric capacity C3; Also comprise rectifier bridge Q1 and DC filter capacitor CD1.
The output of described ac filter circuit connects rectifier bridge Q1, DC filter capacitor CD1 is connected in the output of rectifier bridge Q1 in parallel, thermistor RT1 is connected on an output of rectifier bridge Q1, described ductility limit regulating circuit is connected in the two ends of DC filter capacitor CD1 in parallel, in ductility limit regulating circuit, the intermediate node of resistance R2 and resistance R3 is connected to the outside ductility limit adjustable side 3X of described power supply control chip U1, and ductility limit regulating circuit is for regulating the mistake flow point of power supply.Described absorbing circuit is connected between one end of DC filter capacitor CD1 and the drain electrode 7D of described power supply control chip U1, for absorbing the spike produced when switching tube turns off, prevents metal-oxide-semiconductor by high electrical breakdown.
Described line voltage detecting circuit comprises resistance R4, resistance R5 and voltage-stabiliser tube Z1, resistance R4 and voltage-stabiliser tube Z1 forms series arm, this series arm is connected in parallel on the two ends of DC filter capacitor CD1, and the intermediate node of resistance R4 and voltage-stabiliser tube Z1 meets the wireline inspection end 2L of described power supply control chip U1 through resistance R5.
Power supply control chip U1 selects TOP249Y chip.Its control end 1C connects the output of optocoupler GO1, and its outside ductility limit adjustable side 3X is connected on the series connection node between resistance R2 and resistance R3, and its source electrode 4S and switching frequency selecting side 5F receives an output of rectifier bridge Q1 altogether.
The typical overvoltage OV of TOP249Y chip and the voltage ratio of under-voltage UV are:
Iov÷Iuv=225÷50=4.5
And the voltage ratio of the utility model input is:
Uin（max)÷Uin(min)=190÷20=9.5
Visible, power supply input range of the present utility model has exceeded the overvoltage of TOP249Y chip and under-voltage typical set scope, and its ac input voltage is up to 135V, therefore, have employed and realize under-voltage line voltage detecting, under-voltage value is set as DC19V, and the feed-forward voltage function of line voltage detecting circuit makes duty ratio raise with input voltage and reduce, and prevents transformer saturated because of high pressure big space rate.
The primary parallel of transformer T1 is connected to the two ends of absorbing circuit, and the secondary of transformer T1 is divided into two groups, and first group connects output rectifier and filter; Second group, after diode D3 and electric capacity C4 rectifying and wave-filtering, provides accessory power supply, then through the output of optocoupler GO1, is connected to the control end 1C of power supply control chip U1.Electric capacity C6 is connected between the control end 1C of power supply control chip U1 and source electrode 4S, is in order to the instantaneous gate drive current providing power supply control chip U1.Be connected in parallel to the series arm be made up of resistance R11 and electric capacity CD4 at the two ends of electric capacity C6, electric capacity C6 and electric capacity CD4 can be used for the dynamic timing of setting autoboot, and can be used for loop compensation.
Transformer T1 is one of core devices of the present utility model, and the design of transformer decides the success or failure of Power Management Design.Because the output voltage of this power supply is very low, no-load voltage ratio differs greatly, therefore reduce leakage inductance be transformer winding difficult point because leakage inductance cross conference cause absorb protection device overheated, even burn power device.The utility model have employed the mode that primary-secondary-primary-secondary-elementary interlayer holds, and transformer leakage inductance controls at below 8uH the most at last.
Described output rectifier and filter forms pi filter by diode D2, electric capacity CD2, inductance L 2, electric capacity CD3 and diode D4.Because the instantaneous pick-up voltage of contactor is 40 ~ 100V, the effect adding diode D4 prevents high pressure from damaging power supply.
Described electric power output voltage sample circuit comprises resistance R6 ~ R10, electric capacity C7, three end adjustable shunt reference source U2 and optocoupler GO1, the input of electric power output voltage sample circuit is connected to the two ends of inductance L 2, and the output of optocoupler GO1 is connected to the control end 1C of power supply control chip U1.Export sampled signal is transported to power supply control chip U1 control end 1C by optocoupler GO1, to realize the stable output of power supply.
Power supply after power, when input voltage is higher than DC38V, high-voltage constant current source in TOP249Y starts to charge to the electric capacity C6 at control end 1C place, power supply is started working, the 3.3V direct voltage of stable output, due to the operating characteristic that the frequency of TOP249Y reduces with load, power supply still normally can be worked when zero load, need not dummy load be added.When input voltage reaches 40V, the exportable 4.5A direct current of power supply, turns up input voltage (AC135V) full blast, and power supply exports 3.3V/7.8A, meets the designing requirement of this power supply.
Claims (4)
1. a Switching Power Supply for super wide range input, is characterized in that, comprise input rectifying filter circuit, power supply control chip U1, line voltage detecting circuit, transformer, output rectifier and filter and electric power output voltage sample circuit;
The output of described current rectifying and wave filtering circuit and the output of described power supply control chip U1 are connected respectively to the primary side of described transformer, the secondary end of described transformer connects output rectifier and filter, the output of described output rectifier and filter connects described electric power output voltage sample circuit, the output of described electric power output voltage sample circuit is connected on described power supply control chip U1, and described line voltage detecting circuit is arranged between described power supply control chip U1 and described input rectifying filter circuit.
2. the Switching Power Supply of super wide range input according to claim 1, it is characterized in that, described input rectifying filter circuit comprises: the ac filter circuit be made up of electric capacity C1, electric capacity C2 and inductance L 1, the ductility limit regulating circuit be composed in series by resistance R2 and resistance R3, and the absorbing circuit be made up of diode D1, TVS diode D5, resistance R1 and electric capacity C3; Also comprise rectifier bridge Q1 and DC filter capacitor CD1;
The output of described ac filter circuit connects rectifier bridge Q1, DC filter capacitor CD1 is connected in the output of rectifier bridge Q1 in parallel, described ductility limit regulating circuit is connected in the two ends of DC filter capacitor CD1 in parallel, and in described ductility limit regulating circuit, the intermediate node of resistance R2 and resistance R3 is connected to the outside ductility limit adjustable side 3X of described power supply control chip U1.
3. the Switching Power Supply of super wide range input according to claim 2, it is characterized in that, described line voltage detecting circuit comprises resistance R4, resistance R5 and voltage-stabiliser tube Z1, resistance R4 and voltage-stabiliser tube Z1 forms series arm, this series arm is connected in parallel on the two ends of DC filter capacitor CD1, and the intermediate node of resistance R4 and voltage-stabiliser tube Z1 meets the wireline inspection end 2L of described power supply control chip U1 through resistance R5.
4. the Switching Power Supply of super wide range input according to claim 3, it is characterized in that, described electric power output voltage sample circuit comprises resistance R6 ~ R10, electric capacity C7, three end adjustable shunt reference source U2 and optocoupler GO1, for output sampled signal to be transported to the control end 1C of power supply control chip U1 by optocoupler GO1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520968660.9U CN205123587U (en) | 2015-11-30 | 2015-11-30 | Switching power supply of super wide region input |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520968660.9U CN205123587U (en) | 2015-11-30 | 2015-11-30 | Switching power supply of super wide region input |
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| Publication Number | Publication Date |
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| CN205123587U true CN205123587U (en) | 2016-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520968660.9U Expired - Fee Related CN205123587U (en) | 2015-11-30 | 2015-11-30 | Switching power supply of super wide region input |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107919801A (en) * | 2017-12-11 | 2018-04-17 | 浙江正泰仪器仪表有限责任公司 | A kind of inverse-excitation type switch power-supply circuit |
| CN108429467A (en) * | 2018-05-17 | 2018-08-21 | 深圳市三维自动化工程有限公司 | A kind of high-speed switch power circuit adapting to low-temp low-pressure altitude environment |
| CN111398655A (en) * | 2020-03-08 | 2020-07-10 | 苏州浪潮智能科技有限公司 | Input current detection circuit and method |
-
2015
- 2015-11-30 CN CN201520968660.9U patent/CN205123587U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107919801A (en) * | 2017-12-11 | 2018-04-17 | 浙江正泰仪器仪表有限责任公司 | A kind of inverse-excitation type switch power-supply circuit |
| CN108429467A (en) * | 2018-05-17 | 2018-08-21 | 深圳市三维自动化工程有限公司 | A kind of high-speed switch power circuit adapting to low-temp low-pressure altitude environment |
| CN111398655A (en) * | 2020-03-08 | 2020-07-10 | 苏州浪潮智能科技有限公司 | Input current detection circuit and method |
| CN111398655B (en) * | 2020-03-08 | 2022-12-09 | 苏州浪潮智能科技有限公司 | Input current detection circuit and method |
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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: 20160330 Termination date: 20181130 |