CN204705931U - Wide region is adjustable linear stabilized power supply - Google Patents
Wide region is adjustable linear stabilized power supply Download PDFInfo
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- CN204705931U CN204705931U CN201520436861.4U CN201520436861U CN204705931U CN 204705931 U CN204705931 U CN 204705931U CN 201520436861 U CN201520436861 U CN 201520436861U CN 204705931 U CN204705931 U CN 204705931U
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Abstract
The utility model discloses the adjustable linear stabilized power supply of a kind of wide region, comprise Industrial Frequency Transformer, current rectifying and wave filtering circuit, voltage stabilizing Circuit tuning and output filter circuit; It is characterized in that: it is elementary that AC-input voltage is connected to Industrial Frequency Transformer, Industrial Frequency Transformer secondary connection rectifier bridge D1 input end, rectifier bridge D1 output terminal is connected with filter capacitor C1, after filter capacitor C1 filtering, output to voltage stabilizing Circuit tuning, voltage stabilizing exports and export to load after filter capacitor C2 filtering.Utilize Industrial Frequency Transformer isolated buck, utilize comparer to control main power tube pressure reduction, utilize operational amplifier and triode Serial regulation output voltage.It is adaptable that the utility model has electrical network, exports that the precision of voltage regulation is high, output ripple voltage is low, output current is large, output power is large, reliability is high, can realize the features such as wide region regulates voltage stabilizing output, adaptive capacity to environment strong continuously.
Description
Technical field
The utility model relates to a kind of voltage-stabilized power supply circuit, specifically, relates to the adjustable linear stabilized power supply of a kind of wide region.
Background technology
Wide region is adjustable, and linear stabilized power supply is the one of series regulator, this circuit utilizes Correctional tube Linear Amplifer principle, regulated output voltage is realized by the line drop adjusting transistor, the high-level efficiency that main power tube pressure reduction technology realizes linear power supply is controlled by comparer, the feature of its higher precision of voltage regulation and low ripple is that switching type power supply is incomparable, and what be still widely used in precision instrumentation so far supplies electrical domain.Power and the current limit of one chip linear stabilized power supply can be exceeded, realize high-power and High-current output, and wide-range voltage adjustment can be realized.
Utility model content
This solves the problems of the technologies described above and a kind of wide region adjustable linear stabilized power supply designed the utility model just.
The utility model solves the technical scheme that its technical matters adopts:
The adjustable linear stabilized power supply of a kind of wide region, comprises Industrial Frequency Transformer, current rectifying and wave filtering circuit, voltage stabilizing Circuit tuning and output filter circuit; It is elementary that its AC-input voltage is connected to Industrial Frequency Transformer, Industrial Frequency Transformer secondary connection rectifier bridge D1 input end, rectifier bridge D1 output terminal is connected with filter capacitor C1, after filter capacitor C1 filtering, output to voltage stabilizing Circuit tuning, and voltage stabilizing exports and export to load after filter capacitor C2 filtering; The tapped design of the secondary many groups of Industrial Frequency Transformer; Voltage stabilizing Circuit tuning is made up of operational amplifier U1, U2, triode Q1, Q2, Q3 and subsidiary component, by the divider resistance R4 of output terminal, output voltage is sampled, then the in-phase end of operational amplifier U2 is fed back to, compare with the reference voltage of end of oppisite phase, output signal controls triode Q3 base current after amplifying, to adjust triode Q3 conducting resistance; By the sample resistance R1 that outlet line is connected, output current is sampled; then the in-phase end of operational amplifier U1 is fed back to; compare with the reference voltage of operational amplifier U1 end of oppisite phase; operational amplifier U1 exports and is connected with triode Q2 base stage through resistance R2; the emitter of triode Q2 is connected with the base stage of triode Q1; adjustment triode Q1 conducting and disconnection, realize exporting overcurrent protection.
Described wide region is adjustable linear stabilized power supply, tapped design is organized in the secondary employing of its Industrial Frequency Transformer more, and secondary tap is 2 to 10 groups.
Described wide region is adjustable linear stabilized power supply, its circuit board is arranged in all-metal closed structure, adopts entity embedding.
The course of work of the present utility model is: alternating current 220V input first carries out isolated buck through Industrial Frequency Transformer, to meet the low voltage difference requirement of rear class adjustment triode, transformer secondary output adopts the series system of many groups tap, pulsating direct current is converted to through current rectifying and wave filtering circuit, the controlling circuit of voltage regulation of recycling operational amplifier composition realizes burning voltage by adjustment transistor base electric current and exports, and reduces main power tube pressure reduction during voltage-regulation by the series connection of comparer control transformer tap.Wherein, export sampling and adopt resistor divider to realize feedback circuit and carry out output voltage adjustment, input voltage is changed or load change time output voltage simultaneous adaptation adjustment, achieve the relative stability of output voltage.
The utility model has the following advantages compared with traditional linear power supply:
1, online mode of operation, directly accesses utility grid work.
2, output power is large, and output current is large, " inspection type " overcurrent protection mode.
3, adjustable extent is wide, can realize the continuous regulation output of 0-300V gamut.
4, export the precision of voltage regulation high, ripple voltage is low.
5, all-metal sealing, entity embedding, resistance to harsh environment for use.
6, power supply grid is compatible strong.
The beneficial effects of the utility model be the adjustable linear stabilized power supply of wide region have export the precision of voltage regulation high, the features such as output ripple voltage is low, and output power is large, output current is large, and adjustable extent is wide, and reliability is high, and electrical network is adaptable.
Accompanying drawing explanation
Fig. 1 is the utility model circuit theory diagrams.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further illustrated.
As shown in Figure 1, the adjustable linear stabilized power supply of a kind of wide region of the utility model, comprises Industrial Frequency Transformer, current rectifying and wave filtering circuit, voltage stabilizing Circuit tuning and output filter circuit; It is elementary that its AC-input voltage is connected to Industrial Frequency Transformer, Industrial Frequency Transformer secondary connection rectifier bridge D1 input end, rectifier bridge D1 output terminal is connected with filter capacitor C1, after filter capacitor C1 filtering, output to voltage stabilizing Circuit tuning, and voltage stabilizing exports and export to load after filter capacitor C2 filtering; The tapped design of the secondary many groups of Industrial Frequency Transformer; Voltage stabilizing Circuit tuning is made up of operational amplifier U1, U2, triode Q1, Q2, Q3 and subsidiary component, by the divider resistance R4 of output terminal, output voltage is sampled, then the in-phase end of operational amplifier U2 is fed back to, compare with the reference voltage of end of oppisite phase, output signal controls triode Q3 base current after amplifying, to adjust triode Q3 conducting resistance; By the sample resistance R1 that outlet line is connected, output current is sampled; then the in-phase end of operational amplifier U1 is fed back to; compare with the reference voltage of operational amplifier U1 end of oppisite phase; operational amplifier U1 exports and is connected with triode Q2 base stage through resistance R2; the emitter of triode Q2 is connected with the base stage of triode Q1; adjustment triode Q1 conducting and disconnection, realize exporting overcurrent protection.
Described wide region is adjustable linear stabilized power supply, tapped design is organized in the secondary employing of its Industrial Frequency Transformer more, and secondary tap is 2 to 10 groups.
Described wide region is adjustable linear stabilized power supply, its circuit board is arranged in all-metal closed structure, adopts entity embedding.
First AC-input voltage enters Industrial Frequency Transformer, and Industrial Frequency Transformer adopts electrical network Design of Compatibility, the secondary 5 groups of tapped designs of Industrial Frequency Transformer, and overload capacity is strong, and power supply complete machine grid adaptability is significantly promoted.Power frequency ac voltage after Industrial Frequency Transformer step-down, through rectifier bridge rectification, becomes the direct current of pulsation, carries out, after filtering, entering voltage stabilizing Circuit tuning through filter capacitor group.Voltage stabilizing Circuit tuning is sampled to output voltage by the divider resistance of output terminal, then the in-phase end of operational amplifier U2 is fed back to, compare with the reference voltage of end of oppisite phase, output signal controls transistor base electric current after amplifying, to adjust triode on resistance, and then adjustment output voltage, realize output voltage relatively stable; Output voltage is detected by comparer when voltage-regulation, the group number of control transformer secondary voltage series connection, when output voltage reduces, transformer secondary output series connection group number reduces, and when output voltage raises, transformer secondary output series connection group number increases, thus changes power tube pressure reduction raising power-efficient.By the sample resistance that outlet line is connected, output current is sampled; then the in-phase end of operational amplifier U1 is fed back to; compare with the reference voltage of end of oppisite phase; once exceed the current threshold of setting; adjustment triode will be operated in vibration conduction mode; until overcurrent is removed, i.e. inspection type protected mode, realizes exporting overcurrent protection.
The utility model is not limited to above-mentioned preferred forms, anyone other any or akin products identical with the utility model drawn under enlightenment of the present utility model, all drops within protection domain of the present utility model.
Claims (3)
1. the adjustable linear stabilized power supply of wide region, comprises Industrial Frequency Transformer, current rectifying and wave filtering circuit, voltage stabilizing Circuit tuning and output filter circuit; It is characterized in that: it is elementary that AC-input voltage is connected to Industrial Frequency Transformer, Industrial Frequency Transformer secondary connection rectifier bridge D1 input end, rectifier bridge D1 output terminal is connected with filter capacitor C1, after filter capacitor C1 filtering, output to voltage stabilizing Circuit tuning, voltage stabilizing exports and export to load after filter capacitor C2 filtering; The tapped design of the secondary many groups of Industrial Frequency Transformer; Voltage stabilizing Circuit tuning is made up of operational amplifier U1, U2, triode Q1, Q2, Q3 and subsidiary component, by the divider resistance R4 of output terminal, output voltage is sampled, then the in-phase end of operational amplifier U2 is fed back to, compare with the reference voltage of end of oppisite phase, output signal controls triode Q3 base current after amplifying, to adjust triode Q3 conducting resistance; By the sample resistance R1 that outlet line is connected, output current is sampled; then the in-phase end of operational amplifier U1 is fed back to; compare with the reference voltage of operational amplifier U1 end of oppisite phase; operational amplifier U1 exports and is connected with triode Q2 base stage through resistance R2; the emitter of triode Q2 is connected with the base stage of triode Q1; adjustment triode Q1 conducting and disconnection, realize exporting overcurrent protection.
2. the adjustable linear stabilized power supply of wide region according to claim 1, is characterized in that: tapped design is organized in the secondary employing of Industrial Frequency Transformer more, and secondary tap is 2 to 10 groups.
3. the adjustable linear stabilized power supply of wide region according to claim 1, is characterized in that: circuit board is arranged in all-metal closed structure, adopts entity embedding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520436861.4U CN204705931U (en) | 2015-06-24 | 2015-06-24 | Wide region is adjustable linear stabilized power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520436861.4U CN204705931U (en) | 2015-06-24 | 2015-06-24 | Wide region is adjustable linear stabilized power supply |
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| CN204705931U true CN204705931U (en) | 2015-10-14 |
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| CN201520436861.4U Active CN204705931U (en) | 2015-06-24 | 2015-06-24 | Wide region is adjustable linear stabilized power supply |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109343628A (en) * | 2018-11-08 | 2019-02-15 | 深圳航天科技创新研究院 | A kind of high-voltage linear source of stable pressure |
| CN110855167A (en) * | 2019-11-18 | 2020-02-28 | 北京大华无线电仪器有限责任公司 | Method for realizing constant-power output direct-current power supply |
-
2015
- 2015-06-24 CN CN201520436861.4U patent/CN204705931U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109343628A (en) * | 2018-11-08 | 2019-02-15 | 深圳航天科技创新研究院 | A kind of high-voltage linear source of stable pressure |
| CN110855167A (en) * | 2019-11-18 | 2020-02-28 | 北京大华无线电仪器有限责任公司 | Method for realizing constant-power output direct-current power supply |
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