CN205142032U - Input/output current-limiting voltage-stabilizing power supply - Google Patents
Input/output current-limiting voltage-stabilizing power supply Download PDFInfo
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- CN205142032U CN205142032U CN201520979490.4U CN201520979490U CN205142032U CN 205142032 U CN205142032 U CN 205142032U CN 201520979490 U CN201520979490 U CN 201520979490U CN 205142032 U CN205142032 U CN 205142032U
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- 238000005070 sampling Methods 0.000 claims abstract description 69
- 238000001914 filtration Methods 0.000 claims abstract description 21
- 230000001012 protector Effects 0.000 claims abstract description 11
- 230000005669 field effect Effects 0.000 claims description 11
- 238000010248 power generation Methods 0.000 abstract 2
- 230000000087 stabilizing effect Effects 0.000 abstract 1
- 238000011084 recovery Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
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Abstract
The utility model discloses a constant voltage power supply of input/output current-limiting, including rectification filtering unit, PWM the control unit, voltage stabilizing unit, overvoltage protector, input current sampling unit, output voltage sampling unit, output current sampling unit, power supply unit, input current sampling unit and output current sampling unit all embed the electric current sampling chip, and the built-in voltage sampling chip of output voltage sampling unit. Compared with the prior art, the stabilized voltage power supply with the input and output current limiting function can limit the output current of a device connected with the front end of the stabilized voltage power supply, the mechanical service life of the connected device such as a power generation device is ensured, and a user can adjust the magnitude of the limited current according to the difference of the power generation device; meanwhile, the power supply is provided with a battery charging current-limiting protection circuit, the safety of battery charging is ensured, the practicability is high, the application range is wide, and the popularization is easy.
Description
Technical field
The utility model relates to power technique fields, specifically a kind of stabilized voltage power supply of practical, input and output current limliting.
Background technology
Stabilized voltage power supply (stabilizedvoltagesupply) can provide the electronic installation of stable AC power or DC power supply for load, comprises alternating current steady voltage plug and the large class of D.C. regulated power supply two.The stabilized voltage power supply of prior art cannot limit electric current input and output, input and output size of current is so just caused to differ, certain damage is caused to the device of this stabilized voltage power supply of application, such as Blast Furnace Top Gas Recovery Turbine Unit (TRT), shorten its mechanical endurance, based on this, now provide a kind of stabilized voltage power supply of input and output current limliting, this power supply is mainly used in the low pressure occasion that input power is not 220V, such as low-voltage power generator.
Summary of the invention
Technical assignment of the present utility model is for above weak point, provides a kind of stabilized voltage power supply of practical, input and output current limliting.
A kind of stabilized voltage power supply of input and output current limliting; comprise rectification filtering unit, PWM control unit, voltage regulation unit, overvoltage protector, input current sampling unit, output voltage sampling unit, output current sampling unit, power supply unit; described input current sampling unit and the equal built-in current sampling A/D chip of output current sampling unit; output voltage sampling unit built-in voltage sampling A/D chip, wherein:
Rectification filtering unit, changes alternating current into direct current and its structure comprises AC-DC converter, filter;
PWM control unit, connects above-mentioned rectification filtering unit;
Voltage regulation unit, connects said PWM control unit and output voltage sampling unit;
Overvoltage protector, input current sampling unit, all connect the output of above-mentioned rectification filtering unit, and input current sampling unit is also connected with PWM control unit;
Output voltage sampling unit, connects PWM control unit;
Power supply unit, connecting above-mentioned unit is also its power supply.
Described PWM control unit comprises the field effect transistor be connected with rectification filtering unit and voltage regulation unit, the pulse width modulating chip being connected this field effect transistor, connects the PWM generator of pulse width modulating chip, and this PWM generator also connects input current sampling unit, output voltage sampling unit and output current sampling unit.
What described voltage regulation unit adopted is that LC filter or three ends can align pressurizer.
Signal conditioner is provided with between the current sample chip of described input current sampling unit and PWM generator, between the current sample chip of output current sampling unit and PWM generator.
Described power supply unit comprises the mains switch, step-down chip, the power supply that are linked in sequence, and mains switch also connects battery interface, and this battery interface also connects output current sampling unit.
The stabilized voltage power supply of a kind of input and output current limliting of the present utility model, has the following advantages:
The stabilized voltage power supply of a kind of input and output current limliting of this utility model has the feature of overall structure advantages of simple, the small and exquisite grace of moulding, this stabilized voltage power supply can limit the device output current that its front end connects, ensure the mechanical endurance of the device such as Blast Furnace Top Gas Recovery Turbine Unit (TRT) connected, user according to the difference of Blast Furnace Top Gas Recovery Turbine Unit (TRT), can regulate the size of Limited Current; This Power Management Design has battery charging current limiter protective circuit simultaneously, guarantees the fail safe that battery charges, practical, applied widely, is easy to promote.
Accompanying drawing explanation
Accompanying drawing 1 is structural representation of the present utility model.
Mark in accompanying drawing represents respectively:
1, rectification filtering unit, 1.1, AC-DC converter, 1.2, filter; 2, PWM control unit, 2.1, field effect transistor, 2.2, pulse width modulating chip; 2.3, PWM generator, 3, voltage regulation unit, 4, voltage sample chip; 5, output current sampling unit, 5.1, current sample chip, 6, power supply unit; 6.1, mains switch, 6.2, step-down chip, 6.3, power supply; 7, input current sampling unit, 8, overvoltage protector, 9, battery interface.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
The stabilized voltage power supply that a kind of input and output current limliting is provided of the present utility model; as shown in Figure 1; comprise rectification filtering unit 1, PWM control unit 2, voltage regulation unit 3, overvoltage protector 8, input current sampling unit 7, output voltage sampling unit, output current sampling unit 5, power supply unit 6; described input current sampling unit 7 and output current sampling unit 5 all built-in current sampling A/D chip 5.1; output voltage sampling unit is voltage sample chip 4, wherein:
Rectification filtering unit 1, changes alternating current into direct current and its structure comprises AC-DC converter 1.1, filter 1.2;
PWM control unit 2, connects above-mentioned rectification filtering unit 1;
Voltage regulation unit 3, connects said PWM control unit 2 and output voltage sampling unit;
Overvoltage protector 8, input current sampling unit 7, all connect the output of above-mentioned rectification filtering unit 1, and input current sampling unit 7 is also connected with PWM control unit 2;
Output voltage sampling unit, connects PWM control unit 2;
Power supply unit 6, connecting above-mentioned unit is also its power supply.
Described PWM control unit 2 comprises the field effect transistor 2.1 be connected with rectification filtering unit 1 and voltage regulation unit 3, the pulse width modulating chip 2.2 being connected this field effect transistor 2.1, the PWM generator 2.3 that connects pulse width modulating chip 2.2, and this PWM generator 2.3 also connects input current sampling unit 7, output voltage sampling unit and output current sampling unit 5.
What described voltage regulation unit 3 adopted is that LC filter or three ends can align pressurizer.
Signal conditioner is provided with between the current sample chip 5.1 of described input current sampling unit 7 and PWM generator 2.3, between the current sample chip 5.1 of output current sampling unit 5 and PWM generator 2.3.
Described power supply unit 6 comprises the mains switch 6.1, step-down chip 6.2, the power supply 6.3 that are linked in sequence, and mains switch 6.1 also connects battery interface 9, and this battery interface 9 also connects output current sampling unit 5.
Wherein rectification filtering unit 1 changes the alternating current of input into direct current; PWM control unit 2 is core control portions of this power supply, have employed SG3525 pulse width modulating chip 2.2; Input current sampling unit 7 and battery charge sampling unit feed back to the reverse input end of SG3525 internal error amplifier, after SG3525 computing, the duty ratio of field effect transistor 2.1 conducting and closedown is regulated through PWM driver element, thus regulation output voltage, Limited Current size; Voltage regulation unit 3 adopts LC filtering voltage regulation, and the direct current of pulsation field effect transistor 2.1 exported is adjusted to galvanic current; Output voltage sampling unit adopts output voltage and feeds back to SG3525, thus guarantees that output voltage is the magnitude of voltage of setting; Overvoltage protector 8 pairs of input voltages limit, protection rear class unit; Due to SG3525 and the restriction of sampling unit operating voltage, therefore output voltage is depressurized to 15V, for system unit provides power supply.
AC power, through rectification filtering unit 1, changes direct current into, by mains switch 6.1 unit by external connection battery drawing-in system unit, drives whole system cell operation.PWM generator 2.3 produces pwm signal, by driving the switch of field effect transistor 2.1, carries out copped wave to the direct current after rectification, and the square wave direct current electricity after copped wave, through voltage regulation unit 3, changes galvanic current into.DirectCurrent Voltage Ratio cell voltage is slightly high, thus charges to battery, and supply load.
Overvoltage protector 8 pairs of rear class unit of input carry out voltage protection, and after the voltage after rectifying and wave-filtering exceedes setting voltage, overvoltage protector 8 conducting rapidly, remains short-circuit condition, thus ensures the safety of rear class unit.
When the alternating voltage inputted is lower, under same bearing power, being bound to load current can be very large; Input current sampling unit 7 feeds back to PWM generator 2.3, reduces the conducting duty ratio of field effect transistor 2.1, reduces output voltage, reduces output current, thus reaches the object of limiting input current.
Equally, the current sampling unit of battery interface 9 realizes the adjustment of battery charge.
Input current limliting, can protect the power unit of front end, prevents because rear class cell failure causes front end power supply to damage; Output current limiting ensures the charging safety of battery.
The utility model adopts voltage signal, so control source can be the microcontroller of slide rheostat or outputting analog signal to the control signal that input current controls; Wide input voltage range, and input voltage grade is lower relative to the Switching Power Supply (200VAC ~ 240VAC) on market, is applicable to small-sized electric generating apparatus.
Above-mentioned embodiment is only concrete case of the present utility model; scope of patent protection of the present utility model includes but not limited to above-mentioned embodiment; any meet claims of the stabilized voltage power supply of a kind of input and output current limliting of the present utility model and any person of an ordinary skill in the technical field to its suitable change done or replacement, all should fall into scope of patent protection of the present utility model.
Claims (5)
1. the stabilized voltage power supply of an input and output current limliting; it is characterized in that; comprise rectification filtering unit, PWM control unit, voltage regulation unit, overvoltage protector, input current sampling unit, output voltage sampling unit, output current sampling unit, power supply unit; described input current sampling unit and the equal built-in current sampling A/D chip of output current sampling unit; output voltage sampling unit built-in voltage sampling A/D chip, wherein:
Rectification filtering unit, changes alternating current into direct current and its structure comprises AC-DC converter, filter;
PWM control unit, connects above-mentioned rectification filtering unit;
Voltage regulation unit, connects said PWM control unit and output voltage sampling unit;
Overvoltage protector, input current sampling unit, all connect the output of above-mentioned rectification filtering unit, and input current sampling unit is also connected with PWM control unit;
Output voltage sampling unit, connects PWM control unit;
Power supply unit, connecting above-mentioned unit is also its power supply.
2. the stabilized voltage power supply of a kind of input and output current limliting according to claim 1, it is characterized in that, described PWM control unit comprises the field effect transistor be connected with rectification filtering unit and voltage regulation unit, the pulse width modulating chip being connected this field effect transistor, connects the PWM generator of pulse width modulating chip, and this PWM generator also connects input current sampling unit, output voltage sampling unit and output current sampling unit.
3. the stabilized voltage power supply of a kind of input and output current limliting according to claim 2, is characterized in that, what described voltage regulation unit adopted is that LC filter or three ends can align pressurizer.
4. the stabilized voltage power supply of a kind of input and output current limliting according to claim 2, it is characterized in that, between the current sample chip of described input current sampling unit and PWM generator, between the current sample chip of output current sampling unit and PWM generator, be provided with signal conditioner.
5. the stabilized voltage power supply of a kind of input and output current limliting according to claim 1, it is characterized in that, described power supply unit comprises the mains switch, step-down chip, the power supply that are linked in sequence, and mains switch also connects battery interface, and this battery interface also connects output current sampling unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520979490.4U CN205142032U (en) | 2015-12-01 | 2015-12-01 | Input/output current-limiting voltage-stabilizing power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520979490.4U CN205142032U (en) | 2015-12-01 | 2015-12-01 | Input/output current-limiting voltage-stabilizing power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205142032U true CN205142032U (en) | 2016-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520979490.4U Expired - Fee Related CN205142032U (en) | 2015-12-01 | 2015-12-01 | Input/output current-limiting voltage-stabilizing power supply |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107959409A (en) * | 2016-10-14 | 2018-04-24 | 英飞凌科技股份有限公司 | Protect circuit, guard method and protection system |
| CN109217653A (en) * | 2018-09-13 | 2019-01-15 | 福州大学 | Electromagnetic switch feedforward and feedback control module with super wide working voltage |
-
2015
- 2015-12-01 CN CN201520979490.4U patent/CN205142032U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107959409A (en) * | 2016-10-14 | 2018-04-24 | 英飞凌科技股份有限公司 | Protect circuit, guard method and protection system |
| CN107959409B (en) * | 2016-10-14 | 2020-02-18 | 英飞凌科技股份有限公司 | Protection circuit, protection method and protection system |
| CN109217653A (en) * | 2018-09-13 | 2019-01-15 | 福州大学 | Electromagnetic switch feedforward and feedback control module with super wide working voltage |
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| 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 |
Granted publication date: 20160406 Termination date: 20161201 |
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| CF01 | Termination of patent right due to non-payment of annual fee |