CN104460815A - High-temperature, wide-input and high-precision power source - Google Patents
High-temperature, wide-input and high-precision power source Download PDFInfo
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- CN104460815A CN104460815A CN201410180470.0A CN201410180470A CN104460815A CN 104460815 A CN104460815 A CN 104460815A CN 201410180470 A CN201410180470 A CN 201410180470A CN 104460815 A CN104460815 A CN 104460815A
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Abstract
The invention discloses a high-temperature, wide-input and high-precision power source. The power source comprises a first-level voltage stabilizing circuit (1) and a precision voltage control circuit (2), wherein the first-level voltage stabilizing circuit (1) is composed of darlington transistors with the gain more than 500 times, and the precision voltage control circuit (2) is composed of a high-precision operational amplifier and high-gain darlington geminate transistors. The input end of the first-level voltage stabilizing circuit (1) is connected with a direct current power source with voltage ranging from +35 V to 150 V, the output end of the first-level voltage stabilizing circuit (1) is connected with the precision voltage control circuit (2), the precision voltage control circuit (2) is provided with a path of +30 V direct current voltage output, a path of +15 V direct current voltage output and a set of +/-15 V dual-power-source output. The high-temperature, wide-input and high-precision power source is small in size and capable of working at high temperature of +175 DEG C for a long time, and has the wide input voltage range, and the input and output ratio can be larger than 10:1; the power source precision can be smaller than 0.1%, the ripple does not exceed 5 mV, and the high-temperature, wide-input and high-precision power source is particularly suitable for underground instruments.
Description
Technical field
the present invention relates to the wide input high-precision power of a kind of high temperature, belong to oil well or down-hole instrument particular power source technical field used.
Background technology
high temperature is under oil well or mine, high pressure, the rugged surroundings of high corrosion are therefore very high to the power requirement of subsurface equipment, not only requirement can at down-hole high temperature, high pressure, normally works under the rugged surroundings of high corrosion, and due to subsurface equipment many in underground work, need to use overlength cable power supply, therefore, the input voltage fluctuation scope of power supply is very large, requires to have high input-output ratio.So existing power supply is very short in the underground work life-span, often needs to change, be not well positioned to meet the job requirement of subsurface equipment.
Summary of the invention
the object of the invention is to, provide a kind of high temperature wide input high-precision power, to improve the performance of subsurface equipment power supply, thus overcome the deficiencies in the prior art.
technical scheme of the present invention is achieved in that
the wide input high-precision power of a kind of high temperature, this power supply comprises the first order mu balanced circuit be made up of the Darlington transistor of gain more than 500 times and the accurate voltage circuit for regulating and controlling be made up of high-operational amplifier and high-gain Darlington pair pipe; Input end and+35 ~ 150V direct supply of first order mu balanced circuit is connected, and the output terminal of first order mu balanced circuit is connected with accurate voltage circuit for regulating and controlling; Accurate voltage circuit for regulating and controlling is provided with a road+30V direct voltage output and a road+15V direct voltage output and one group ± 15V dual power supply and exports.
in the wide input high-precision power of afore-said hot, described first order mu balanced circuit comprises Darlington transistor V1, and the collector of Darlington transistor V1 is connected with the input of+35 ~ 150V direct supply through resistance R1; The base stage of Darlington transistor V1 is connected with the input of+35 ~ 150V direct supply through resistance R2, and the base stage of Darlington transistor V1 is connected with the negative pole of stabilivolt V2, the plus earth of stabilivolt V2; Transmitting very+30V the DC power output end of Darlington transistor V1; Electric capacity C1 is parallel with between the emitter of Darlington transistor V1 and ground.
in the wide input high-precision power of afore-said hot, the resistance R1 in described first order mu balanced circuit adopts fusible anti-ignition resistance.
in the wide input high-precision power of afore-said hot, described accurate voltage circuit for regulating and controlling comprises input divider resistance R3/R4, output divider resistance R5/R6, high-operational amplifier N2 and high-gain Darlington pair pipe V3, V4; Input divider resistance R3/R4 one end is connected with+30V the DC power output end of first order mu balanced circuit (1), input divider resistance R3/R4 other end ground connection, and the tie point of input divider resistance R3/R4 is connected with the pin 3 of high-operational amplifier N2; Output divider resistance R5/R6 one end is connected with+30V DC power output end, output divider resistance R5/R6 other end ground connection, and the tie point of output divider resistance R5/R6 is connected with the pin 6 of high-operational amplifier N2; The pin 7 of high-operational amplifier N2 is connected with+30V DC power output end; Pin 4 ground connection of high-operational amplifier N2; The pin 6 of high-operational amplifier N2 is connected with two base stages of high-gain Darlington pair pipe V3 and V4, V3 collector in high-gain Darlington pair pipe is connected with+30V DC power output end, V4 grounded collector in high-gain Darlington pair pipe, two emitters of high-gain Darlington pair pipe V3 with V4 are connected rear conduct+15V DC voltage output end; + 15V DC voltage output end is connected with the pin 2 of high-operational amplifier N2; Be parallel with electric capacity C2 between the pin 3 of high-operational amplifier N2 and pin 7, between the pin 2 of high-operational amplifier N2 and pin 6, be parallel with electric capacity C3; The pin 7 of high-operational amplifier N2 is connected with electric capacity C4 one end, and the electric capacity C4 other end is as+15V the output terminal of dual power supply; The pin 4 of high-operational amplifier N2 is connected with electric capacity C5 one end, and the electric capacity C5 other end is as-15V the output terminal of dual power supply; + 30V DC power output end is through electric capacity C6 and electric capacity C7 series circuit ground connection, and electric capacity C6 is connected with two emitters of high-gain Darlington pair pipe V3 and V4 with the tie point of electric capacity C7.
in the wide input high-precision power of afore-said hot, in described accurate voltage circuit for regulating and controlling, the amplification multiple of high-gain Darlington pair pipe V3 with V4 is identical and be greater than 500 times.
owing to have employed technique scheme, compared with prior art, existing DC/DC Switching Power Supply generally can only accomplish 2:1 input/output relation in the present invention, and the DC/DC that minority price is very expensive can accomplish 4:1 input-output ratio.As long as the advantage of power supply of the present invention is that the power of V1 is enough large, can design any input-output ratio power supply, Costco Wholesale is very low simultaneously.Existing more than 10W DC/DC Switching Power Supply starting current almost can not accomplished within 0.5A, so just to cause power supply normally cannot start or need very high trigger voltage, also needs to increase the circuit such as under-voltage starting protection simultaneously thus increases cost.And the starting current of power supply of the present invention can not exceed 2 times of rated current, be well suited for as there being the equipment that is powered of high source impedance to provide small-power power.Be specially adapted to use in overlength cable power supply equipment in fields such as oil, chemical industry, communications.Existing DC/DC power supply is once output voltage is determined, change very difficult, power supply of the present invention only need change the parameter of V2, also can provide the virtual power supply of various ways such as ± 5V, ± 12V, add the dirigibility of design.As long as the power license of V1 or load current are not very large, input and output voltage ratio can accomplish more than 10:1.The precision of existing DC/DC Switching Power Supply generally can only accomplish 1%, and ripple is not less than 1% and is difficult to eliminate.Power supply of the present invention can ensure that the precision of power supply reaches within 0.1%, and ripple is no more than 5mV, is more suitable for the High-resolution Data Acquisition Circuit needing stabilized power source.Existing DC/DC Switching Power Supply all requires a minimum load, otherwise is difficult to obtain stable output, and under its load situation of change, the maximum change of output voltage can reach 2.5% simultaneously.Power supply of the present invention does not need preload, and load output voltage change under zero load and full load situation is less than 0.5% very much.Existing DC/DC Switching Power Supply general work temperature can only accomplish-40 DEG C ~+85 DEG C, and more than+125 DEG C Switching Power Supply products are not also reported both at home and abroad.Power supply of the present invention can arrive-55 DEG C ~+175 DEG C through its working range of test.The number of elements that power supply of the present invention needs is few, and the power supply therefore manufactured can be applicable to low volume applications.Although existing linear power supply can accomplish degree of precision and less ripple, very large input and output pressure reduction and high-power cannot be reached.Power supply of the present invention had both possessed the feature of Switching Power Supply wide input voltage range, possessed again some advantages of linear power supply.
Accompanying drawing explanation
fig. 1 is circuit structure schematic diagram of the present invention.
being labeled as in figure: 1-first order mu balanced circuit, 2-accurate voltage circuit for regulating and controlling.
Embodiment
below in conjunction with drawings and Examples, the present invention is described in further detail, but not as any limitation of the invention.
Embodiment
the wide input high-precision power of a kind of high temperature, as shown in Figure 1.This power supply comprises the first order mu balanced circuit 1 be made up of the Darlington transistor of gain more than 500 times and the accurate voltage circuit for regulating and controlling 2 be made up of high-operational amplifier and high-gain Darlington pair pipe; Input end and+35 ~ 150V direct supply of first order mu balanced circuit is connected, and the output terminal of first order mu balanced circuit is connected with accurate voltage circuit for regulating and controlling; Accurate voltage circuit for regulating and controlling is provided with a road+30V direct voltage output and a road+15V direct voltage output and one group ± 15V dual power supply and exports.First order mu balanced circuit comprises Darlington transistor V1, and the collector of Darlington transistor V1 is connected with the input of+35 ~ 150V direct supply through resistance R1; The base stage of Darlington transistor V1 is connected with the input of+35 ~ 150V direct supply through resistance R2, and the base stage of Darlington transistor V1 is connected with the negative pole of stabilivolt V2, the plus earth of stabilivolt V2; Transmitting very+30V the DC power output end of Darlington transistor V1; Electric capacity C1 is parallel with between the emitter of Darlington transistor V1 and ground.Resistance R1 in first order mu balanced circuit adopts fusible anti-ignition resistance.Accurate voltage circuit for regulating and controlling comprises input divider resistance R3/R4, output divider resistance R5/R6, high-operational amplifier N2 and high-gain Darlington pair pipe V3, V4; Input divider resistance R3/R4 one end is connected with+30V the DC power output end of first order mu balanced circuit 1, input divider resistance R3/R4 other end ground connection, and the tie point of input divider resistance R3/R4 is connected with the pin 3 of high-operational amplifier N2; Output divider resistance R5/R6 one end is connected with+30V DC power output end, output divider resistance R5/R6 other end ground connection, and the tie point of output divider resistance R5/R6 is connected with the pin 6 of high-operational amplifier N2; The pin 7 of high-operational amplifier N2 is connected with+30V DC power output end; Pin 4 ground connection of high-operational amplifier N2; The pin 6 of high-operational amplifier N2 is connected with two base stages of high-gain Darlington pair pipe V3 and V4, V3 collector in high-gain Darlington pair pipe is connected with+30V DC power output end, V4 grounded collector in high-gain Darlington pair pipe, two emitters of high-gain Darlington pair pipe V3 with V4 are connected rear conduct+15V DC voltage output end; + 15V DC voltage output end is connected with the pin 2 of high-operational amplifier N2; Be parallel with electric capacity C2 between the pin 3 of high-operational amplifier N2 and pin 7, between the pin 2 of high-operational amplifier N2 and pin 6, be parallel with electric capacity C3; The pin 7 of high-operational amplifier N2 is connected with electric capacity C4 one end, and the electric capacity C4 other end is as+15V the output terminal of dual power supply; The pin 4 of high-operational amplifier N2 is connected with electric capacity C5 one end, and the electric capacity C5 other end is as-15V the output terminal of dual power supply; + 30V DC power output end is through electric capacity C6 and electric capacity C7 series circuit ground connection, and electric capacity C6 is connected with two emitters of high-gain Darlington pair pipe V3 and V4 with the tie point of electric capacity C7.In accurate voltage circuit for regulating and controlling, the amplification multiple of high-gain Darlington pair pipe V3 with V4 is identical and be greater than 500 times.
principle of work of the present invention and feature
as shown in Figure 1, its innovative point mainly contains following several respects to the electrical principle of power supply of the present invention:
1, reach Darlington transistor V1 by resistance R1, R2, high-gain, voltage stabilizing V2 forms first order voltage stabilizing.Wherein high-gain reaches Darlington transistor V1 gain must be adopted to reach the Darlington transistor of more than 500 times, as can be caused the very large ideal base drive current of needs with common triode, causes triode thermal value very large like this and cannot meet hot environment work.In addition, resistance R1 should adopt fusible anti-ignition resistance, ensures that interlock circuit can not be damaged under load overcurrent, short-circuit conditions.
2, reach Darlington pair pipe V3, V4 by resistance R3 ~ R6, high-operational amplifier N2, high-gain, electric capacity C1 ~ C7 forms accurate voltage circuit for regulating and controlling.This circuit drives Darlington transistor fully to ensure by the feedback of high precision operating amplifier, and+30V and+15V high precision, low ripple export, can also ensure that the impedance of power supply output source is low, not by the impact of load change, particularly in carrier communication application, load certainly exists big ups and downs and can ensure that the load regulation of power supply reaches within 0.5%.
3, power supply of the present invention is by the ratio of adjusting resistance R3, R4 and the ratio of R5, R6, exports by the free voltage+15V can be designed to lower than+30V.
4, in power supply of the present invention, Darlington pair pipe V3, V4 used are more than 500 times high-gain Darlington pair pipes V3, V4, and require that two pipe couplings use, and effectively can reduce the consumption of circuit own power, improve the operating ambient temperature of circuit.
Claims (5)
1. the wide input high-precision power of high temperature, is characterized in that: this power supply comprises the first order mu balanced circuit (1) be made up of the Darlington transistor of gain more than 500 times and the accurate voltage circuit for regulating and controlling (2) be made up of high-operational amplifier and high-gain Darlington pair pipe; Input end and+35 ~ 150V direct supply of first order mu balanced circuit (1) is connected, and the output terminal of first order mu balanced circuit (1) is connected with accurate voltage circuit for regulating and controlling (2); Accurate voltage circuit for regulating and controlling (2) is provided with a road+30V direct voltage output and a road+15V direct voltage output and one group ± 15V dual power supply and exports.
2. the wide input high-precision power of high temperature according to claim 1, is characterized in that: described first order mu balanced circuit (1) comprises Darlington transistor V1, and the collector of Darlington transistor V1 is connected with the input of+35 ~ 150V direct supply through resistance R1; The base stage of Darlington transistor V1 is connected with the input of+35 ~ 150V direct supply through resistance R2, and the base stage of Darlington transistor V1 is connected with the negative pole of stabilivolt V2, the plus earth of stabilivolt V2; Transmitting very+30V the DC power output end of Darlington transistor V1; Electric capacity C1 is parallel with between the emitter of Darlington transistor V1 and ground.
3. the wide input high-precision power of high temperature according to claim 2, is characterized in that: the resistance R1 in described first order mu balanced circuit (1) adopts fusible anti-ignition resistance.
4. the wide input high-precision power of high temperature according to claim 1, is characterized in that: described accurate voltage circuit for regulating and controlling (2) comprises input divider resistance R3/R4, output divider resistance R5/R6, high-operational amplifier N2 and high-gain Darlington pair pipe V3, V4; Input divider resistance R3/R4 one end is connected with+30V the DC power output end of first order mu balanced circuit (1), input divider resistance R3/R4 other end ground connection, and the tie point of input divider resistance R3/R4 is connected with the pin 3 of high-operational amplifier N2; Output divider resistance R5/R6 one end is connected with+30V DC power output end, output divider resistance R5/R6 other end ground connection, and the tie point of output divider resistance R5/R6 is connected with the pin 6 of high-operational amplifier N2; The pin 7 of high-operational amplifier N2 is connected with+30V DC power output end; Pin 4 ground connection of high-operational amplifier N2; The pin 6 of high-operational amplifier N2 is connected with two base stages of high-gain Darlington pair pipe V3 and V4, V3 collector in high-gain Darlington pair pipe is connected with+30V DC power output end, V4 grounded collector in high-gain Darlington pair pipe, two emitters of high-gain Darlington pair pipe V3 with V4 are connected rear conduct+15V DC voltage output end; + 15V DC voltage output end is connected with the pin 2 of high-operational amplifier N2; Be parallel with electric capacity C2 between the pin 3 of high-operational amplifier N2 and pin 7, between the pin 2 of high-operational amplifier N2 and pin 6, be parallel with electric capacity C3; The pin 7 of high-operational amplifier N2 is connected with electric capacity C4 one end, and the electric capacity C4 other end is as+15V the output terminal of dual power supply; The pin 4 of high-operational amplifier N2 is connected with electric capacity C5 one end, and the electric capacity C5 other end is as-15V the output terminal of dual power supply; + 30V DC power output end is through electric capacity C6 and electric capacity C7 series circuit ground connection, and electric capacity C6 is connected with two emitters of high-gain Darlington pair pipe V3 and V4 with the tie point of electric capacity C7.
5. the wide input high-precision power of high temperature according to claim 4, is characterized in that: in described accurate voltage circuit for regulating and controlling (2), the amplification multiple of high-gain Darlington pair pipe V3 with V4 is identical and be greater than 500 times.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410180470.0A CN104460815B (en) | 2014-04-30 | 2014-04-30 | A kind of high temperature width input high-precision power |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410180470.0A CN104460815B (en) | 2014-04-30 | 2014-04-30 | A kind of high temperature width input high-precision power |
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| CN104460815A true CN104460815A (en) | 2015-03-25 |
| CN104460815B CN104460815B (en) | 2016-06-22 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1991003101A1 (en) * | 1989-08-16 | 1991-03-07 | Robert Bosch Gmbh | Darlington transistor circuit |
| JPH07202667A (en) * | 1994-01-10 | 1995-08-04 | Fuji Electric Co Ltd | Semiconductor device |
| CN201266887Y (en) * | 2008-10-13 | 2009-07-01 | 北京新雷能有限责任公司 | Switch electric power circuit with wide input range |
| CN101604840A (en) * | 2009-06-23 | 2009-12-16 | 镇江恒驰科技有限公司 | A kind of low cost high-voltage input step-down power supply |
| CN102013804A (en) * | 2010-11-01 | 2011-04-13 | 天水华天微电子股份有限公司 | Method for compensating large-current output voltage accuracy of switching power supply in wide temperature range |
| CN102075093A (en) * | 2010-12-13 | 2011-05-25 | 山东精久科技有限公司 | Automatic high-precision voltage-stabilizing output circuit with wide-range input voltage in wide range |
| CN202285370U (en) * | 2011-11-08 | 2012-06-27 | 黑龙江八一农垦大学 | System power supply module used in underground measuring instrument |
| CN203825523U (en) * | 2014-04-30 | 2014-09-10 | 贵州航天凯山石油仪器有限公司 | High-temperature wide-input high-precision power supply |
-
2014
- 2014-04-30 CN CN201410180470.0A patent/CN104460815B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1991003101A1 (en) * | 1989-08-16 | 1991-03-07 | Robert Bosch Gmbh | Darlington transistor circuit |
| JPH07202667A (en) * | 1994-01-10 | 1995-08-04 | Fuji Electric Co Ltd | Semiconductor device |
| CN201266887Y (en) * | 2008-10-13 | 2009-07-01 | 北京新雷能有限责任公司 | Switch electric power circuit with wide input range |
| CN101604840A (en) * | 2009-06-23 | 2009-12-16 | 镇江恒驰科技有限公司 | A kind of low cost high-voltage input step-down power supply |
| CN102013804A (en) * | 2010-11-01 | 2011-04-13 | 天水华天微电子股份有限公司 | Method for compensating large-current output voltage accuracy of switching power supply in wide temperature range |
| CN102075093A (en) * | 2010-12-13 | 2011-05-25 | 山东精久科技有限公司 | Automatic high-precision voltage-stabilizing output circuit with wide-range input voltage in wide range |
| CN202285370U (en) * | 2011-11-08 | 2012-06-27 | 黑龙江八一农垦大学 | System power supply module used in underground measuring instrument |
| CN203825523U (en) * | 2014-04-30 | 2014-09-10 | 贵州航天凯山石油仪器有限公司 | High-temperature wide-input high-precision power supply |
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| CN104460815B (en) | 2016-06-22 |
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