CN201298178Y - Mainboard power supply circuit of automatic coupling voltage regulating type AC stabilized voltage power supply - Google Patents
Mainboard power supply circuit of automatic coupling voltage regulating type AC stabilized voltage power supply Download PDFInfo
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- CN201298178Y CN201298178Y CNU2008201795523U CN200820179552U CN201298178Y CN 201298178 Y CN201298178 Y CN 201298178Y CN U2008201795523 U CNU2008201795523 U CN U2008201795523U CN 200820179552 U CN200820179552 U CN 200820179552U CN 201298178 Y CN201298178 Y CN 201298178Y
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- alternating current
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Abstract
The utility model relates to a mainboard power supply circuit of an automatic coupling voltage regulating type AC stabilized voltage power supply. In the utility mode, two power supply units are connected into a stabilized voltage grade by an either-or electronic switch and provided with two power supply input ends, wherein the first power supply unit takes power from the power supply input end of the automatic coupling voltage regulating type AC stabilized voltage power supply, and the second power supply unit takes power from the AC output end of the automatic coupling voltage regulating type AC stabilized voltage power supply in a voltage reducing and coupling mode. After the automatic coupling voltage regulating type AC stabilized voltage power supply is electrified, the first power supply unit is firstly used for supplying power to a mainboard to output the automatic coupling voltage regulating type AC stabilized voltage power supply in a voltage stabilizing mode, and then, the second power supply device is used for supplying power to the stabilized voltage grade of the mainboard power supply circuit. The utility model overcomes cost burden caused by using a step-down transformer and poor adaptability for commercial power in the prior art, has relatively low cost and is not easy to influence by input voltage range.
Description
Technical field
The utility model relates to a kind of feed circuit of mainboard of self-coupling type alternating current steady voltage plug.
Background technology
Utilizing the automatic Regulation mode to reach alternating-voltage stabilization is a type of alternating current steady voltage plug, and its power output part is an autotransformer.As shown in Figure 1, be that a kind of change tap type self coupling is adjusted alternating current steady voltage plug.Autotransformer is made a plurality of fixed taps, is that switching device changes tap position automatically with the bidirectional triode thyristor, thereby realizes the stable of output voltage.At present, about the feed circuit of mainboard of self-coupling type alternating current steady voltage plug, known a kind of prior art is as shown in Figure 2, by the source input end power taking of self-coupling type alternating current steady voltage plug, after the transformer step-down, get by rectification, filtering and mu balanced circuit again.The defective of this feed circuit is: the one, and the feed circuit of mainboard cost height, the volume that have step-down transformer are big; The 2nd, the voltage stabilizing level institute adaptable source input voltage range relative narrower of feed circuit of mainboard, too high or too low source input voltage will make the three terminal integrated voltage stabilizer heating in the voltage stabilizing level or not reach designing requirement.A kind of prior art in addition is to adopt the Switching Power Supply power supply, though this feed circuit of mainboard can be enhanced product performance greatly, cost is too expensive.
Summary of the invention
In view of this, the utility model purpose is to provide the feed circuit of mainboard of the high self-coupling type alternating current steady voltage plug of a kind of cost performance.
For achieving the above object, the utility model adopts a kind of feed circuit of mainboard of self-coupling type alternating current steady voltage plug, comprise the voltage stabilizing level, it is characterized in that, two supply units insert the voltage stabilizing level through the alternative electronic switch, described two supply units have two power supply inputs, and wherein first supply unit is by the source input end power taking of self-coupling type alternating current steady voltage plug, and the second source device is by the ac output end step-down coupling power taking of self-coupling type alternating current steady voltage plug.
As a kind of preferred version of the present utility model, described alternative electronic switch, form by diode (D6), diode (D1) and diode (D2), the output terminal of described first supply unit is connected with the anode of diode (D6), an output terminal of described second source device is connected with the anode of diode (D1), another output terminal of second source device is connected with the anode of diode (D2), and the negative electrode of diode D6, D1 and D2 also connects.
As another kind of preferred version of the present utility model, described first supply unit comprises the resistance-capacitance depressurization circuit, is made up of the parallel circuit of bleeder resistance (R2) and decompression capacitor (C3).
As another preferred version of the present utility model, described second source device comprises one group of absolute coil winding, and the central point of winding is connected to and exchanges ground.
As another preferred version of the present utility model, power resistor (R1) is electrically connected with an end of described resistance-capacitance depressurization circuit, the other end of resistance-capacitance depressurization circuit with exchange between the ground anti-and connect diode (D3), the negative electrode of diode (D3) is connected with the end of filter capacitor (C4) with current-limiting resistance (R3) through detector diode (D4), the other end of current-limiting resistance (R3) is connected with the negative terminal of stabilivolt (D5), and just being connected to of stabilivolt (D5) exchanges ground.
Owing to contain the alternative electronic switch in the feed circuit of mainboard of self-coupling type alternating current steady voltage plug, can select automatically wherein one the tunnel to output to the voltage stabilizing level according to the output voltage size of two supply units.Ac output end output voltage when self-coupling type alternating current steady voltage plug, the second source device starts, the alternative electronic switch is switched to the voltage stabilizing level of feed circuit of mainboard the output terminal of second source device by first supply unit, at this moment, by of the voltage stabilizing level power supply of second source device to feed circuit of mainboard.Just because of the utility model is after self-coupling type alternating current steady voltage plug voltage stabilizing output, power to the voltage stabilizing level of feed circuit of mainboard by the voltage that the absolute coil winding produces, thereby, overcome in the prior art because of using cost burden that step-down transformer causes and poor to the adaptive faculty of civil power, this cost of products is cheap relatively and be not subject to the influence of input voltage range.
Description of drawings
Fig. 1 is a kind of schematic diagram of self-coupling type alternating current steady voltage plug.
Fig. 2 is the feed circuit of mainboard schematic diagram of self-coupling type alternating current steady voltage plug in the prior art.
Fig. 3 is the circuit block diagram of the feed circuit of mainboard of the utility model self-coupling type alternating current steady voltage plug.
Fig. 4 is the circuit theory diagrams of the preferred implementation of the utility model self-coupling type alternating current steady voltage plug feed circuit of mainboard.
Embodiment
The utility model is described in more detail below in conjunction with the drawings and specific embodiments.
Fig. 3 is the circuit block diagram of the feed circuit of mainboard of the utility model self-coupling type alternating current steady voltage plug.The feed circuit of mainboard of this self-coupling type alternating current steady voltage plug comprises first supply unit 1, second source device 2, alternative electronic switch 3 and voltage stabilizing level 4.The source input end U of the input end of first supply unit 1 and self-coupling type alternating current steady voltage plug wherein
UNConnect, second source device 2 is by the ac output end U of self-coupling type alternating current steady voltage plug
UnThe coupling power taking.Alternative electronic switch 3 is according to the comparative result of the output voltage of first supply unit 1 and second source device 2, selects wherein one the tunnel to give voltage stabilizing level 4, for the mainboard of self-coupling type alternating current steady voltage plug provides stable power.
Fig. 4 is the circuit theory diagrams of the preferred implementation of the utility model self-coupling type alternating current steady voltage plug feed circuit of mainboard.
In the present embodiment, constitute the resistance-capacitance depressurization circuit by bleeder resistance R2 and decompression capacitor C3 parallel connection.Power resistor R1 is electrically connected with an end of described resistance-capacitance depressurization circuit, the other end of resistance-capacitance depressurization circuit with exchange between the ground anti-and meet diode D3, the negative electrode of diode D3 is connected with the end of current-limiting resistance R3 with filter capacitor C4 through detector diode D4, the other end of current-limiting resistance R3 is connected with the negative terminal of stabilivolt D5, just being connected to of stabilivolt D5 exchanges ground, the DC voltage of the negative terminal output of stabilivolt D5 is connected with the input end of the integrated stabilivolt of three ends through diode D6 as the output of first supply unit.Interchange outgoing side at self-coupling type alternating current steady voltage plug adds one group of absolute coil winding T, and the coil turn ratio that exchanges outgoing side and absolute coil winding T is 220/12, the central point of this coil winding T is connected to exchanges ground.The alternating voltage of coil winding T two ends output is connected to the input end of the integrated stabilivolt of three ends after diode D1, D2 full-wave rectification and capacitor C 1, C2 filtering.
As shown in Figure 4, self-coupling type alternating current steady voltage plug powered on moment, the source input voltage is exported a direct current voltage through step-down, rectification, filtering and voltage stabilizing, and absolute coil winding T is because of self-coupling type alternating current steady voltage plug no-output voltage, wherein there is not electric energy, therefore, diode D6 conducting and D1, D2 end, single-chip microcomputer on the mainboard obtains power supply beginning operate as normal, and the control Group of Silicon Controlled Rectifier is regulated output.At this moment, absolute coil winding T begins from the ac output end U of self-coupling type alternating current steady voltage plug
UnThe coupling power taking, and in the A point formation one level and smooth DC voltage big than the output voltage of stabilivolt D5, so, diode D1, D2 conducting, diode D6 ends, and since then, the mainboard of self-coupling type alternating current steady voltage plug is mainly by a power voltage supply that becomes 220/12 proportionate relationship with ac output end.
Claims (5)
1. the feed circuit of mainboard of self-coupling type alternating current steady voltage plug, comprise the voltage stabilizing level, it is characterized in that: two supply units insert the voltage stabilizing level through the alternative electronic switch, described two supply units have two power supply inputs, wherein first supply unit is by the source input end power taking of self-coupling type alternating current steady voltage plug, and the second source device is by the ac output end step-down coupling power taking of self-coupling type alternating current steady voltage plug.
2. the feed circuit of mainboard of self-coupling type alternating current steady voltage plug as claimed in claim 1, it is characterized in that: described alternative electronic switch, form by diode (D6), diode (D1) and diode (D2), the output terminal of described first supply unit is connected with the anode of diode (D6), an output terminal of described second source device is connected with the anode of diode (D1), another output terminal of second source device is connected with the anode of diode (D2), and the negative electrode of diode D6, D1 and D2 also connects.
3. the feed circuit of mainboard of self-coupling type alternating current steady voltage plug as claimed in claim 1 or 2 is characterized in that: described first supply unit comprises the resistance-capacitance depressurization circuit, is made up of the parallel circuit of bleeder resistance (R2) and decompression capacitor (C3).
4. the feed circuit of mainboard of self-coupling type alternating current steady voltage plug as claimed in claim 1 or 2 is characterized in that: described second source device comprises one group of absolute coil winding, and the central point of winding is connected to and exchanges ground.
5. the feed circuit of mainboard of self-coupling type alternating current steady voltage plug as claimed in claim 3, it is characterized in that: power resistor (R1) is electrically connected with an end of described resistance-capacitance depressurization circuit, the other end of resistance-capacitance depressurization circuit with exchange between the ground anti-and connect diode (D3), the negative electrode of diode (D3) is connected with the end of filter capacitor (C4) with current-limiting resistance (R3) through detector diode (D4), the other end of current-limiting resistance (R3) is connected with the negative terminal of stabilivolt (D5), and just being connected to of stabilivolt (D5) exchanges ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201795523U CN201298178Y (en) | 2008-11-23 | 2008-11-23 | Mainboard power supply circuit of automatic coupling voltage regulating type AC stabilized voltage power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201795523U CN201298178Y (en) | 2008-11-23 | 2008-11-23 | Mainboard power supply circuit of automatic coupling voltage regulating type AC stabilized voltage power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201298178Y true CN201298178Y (en) | 2009-08-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201795523U Expired - Fee Related CN201298178Y (en) | 2008-11-23 | 2008-11-23 | Mainboard power supply circuit of automatic coupling voltage regulating type AC stabilized voltage power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201298178Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102591391A (en) * | 2011-01-10 | 2012-07-18 | 英飞凌科技股份有限公司 | Voltage regulator |
| CN103227573A (en) * | 2013-05-06 | 2013-07-31 | 陈军 | Alternating-current voltage reduction micro-current supply circuit |
| CN104659774A (en) * | 2015-02-11 | 2015-05-27 | 深圳市航盛电子股份有限公司 | Low-voltage input power supply port protection circuit |
-
2008
- 2008-11-23 CN CNU2008201795523U patent/CN201298178Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102591391A (en) * | 2011-01-10 | 2012-07-18 | 英飞凌科技股份有限公司 | Voltage regulator |
| US8866341B2 (en) | 2011-01-10 | 2014-10-21 | Infineon Technologies Ag | Voltage regulator |
| CN103227573A (en) * | 2013-05-06 | 2013-07-31 | 陈军 | Alternating-current voltage reduction micro-current supply circuit |
| CN104659774A (en) * | 2015-02-11 | 2015-05-27 | 深圳市航盛电子股份有限公司 | Low-voltage input power supply port protection circuit |
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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: 20090826 Termination date: 20111123 |