CN101694965B - Subminiature auto-excitation type high-voltage module power supply special for photomultipliers - Google Patents
Subminiature auto-excitation type high-voltage module power supply special for photomultipliers Download PDFInfo
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- CN101694965B CN101694965B CN2009100708160A CN200910070816A CN101694965B CN 101694965 B CN101694965 B CN 101694965B CN 2009100708160 A CN2009100708160 A CN 2009100708160A CN 200910070816 A CN200910070816 A CN 200910070816A CN 101694965 B CN101694965 B CN 101694965B
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Abstract
The invention relates to a subminiature auto-excitation type high-voltage module power supply special for photomultipliers used in instruments and equipment of optical spectroscopy, quality optical spectroscopy, solid surface analysis, environmental monitoring, biotechnology, medical application and other fields. The subminiature auto-excitation type high-voltage module power supply comprises a power supply circuit which is packaged in a shell and is welded with a plurality of wire needles; and the power supply circuit comprises an auxiliary circuit, an oscillatory circuit, an overcurrent protection circuit, a voltage doubling rectifying circuit, a filtering circuit, a voltage sampling circuit, a voltage feedback circuit, and a reference circuit. The invention has the advantages of high stability, very low EMI and output ripple wave, wide input voltage range, less temperature drift, good long-term stability, small size, light weight, and easy installation.
Description
Technical field
The present invention relates to a kind of Subminiature auto-excitation type high-voltage module power supply special for photomultipliers that is used for spectroscopy, mass spectrum and aspect instrument and equipments such as solid surface analysis, environmental monitoring, biotechnology and medical applications.
Background technology
The control section of existing high voltage source product adopts amplitude, pulse duration (duty ratio) or pulse frequency by control driven oscillator output square wave mostly, and then the power controlling switching tube, reaches purpose stable or that regulate output voltage.Because the control signal of switching tube is a square wave, its fast turn-on and turn-off can bring higher dv/dt and di/dt, can produce more electromagnetic interference (EMI) on the one hand, power supply is polluted; The ripple of output voltage is increased and more difficult filtering thereupon, directly influence the accuracy of client complete machine check and analysis.Also the control section of some high voltage source adopts series connection voltage stabilizing auto-excitation type circuit, though be greatly improved aspect EMI and the output ripple, but the conversion efficiency of sort circuit itself is very low, and power supply is bigger from loss, makes the long-time stability of high voltage source and reliability aspect reduce a lot.
Summary of the invention
In view of the deficiency that prior art exists, the invention provides that a kind of circuit design is reasonable, the stable higher Subminiature auto-excitation type high-voltage module power supply special for photomultipliers of reliability.
The present invention for achieving the above object, the technical scheme of being taked is: a kind of Subminiature auto-excitation type high-voltage module power supply special for photomultipliers, comprise the power circuit that is encapsulated in the housing, be welded with several pins that draw on the power circuit, it is characterized in that: described power circuit comprises auxiliary circuit, oscillating circuit, current foldback circuit, voltage doubling rectifing circuit, filter circuit, voltage sampling circuit, voltage feedback circuit and reference circuit; Diode D1 positive pole meets dc supply input Vin in the described auxiliary circuit, and diode D1 negative pole is leaded up to capacitor C 1 ground connection, and one the tunnel as in-line power end Vcc, and another road connects capacitor C 2 one ends by inductance L 1, the other end ground connection of capacitor C 2; Resistance R 4 in the described oscillating circuit, resistance R 5 one ends connect, its junction is connected with capacitor C 2 positive poles and transformer TRF primary coil end of the same name in the auxiliary circuit respectively, resistance R 4 other ends lead up to positive feedback coil L3 and capacitor C 3 and triode T2 emitter, one end of resistance R 8 and ground connect, another road is connected with the base stage of triode T1 and the collector electrode of triode T2 respectively by resistance R 6, resistance R 5 other ends are connected with an end of triode T2 base stage and resistance R 7 respectively, the other end of resistance R 7 is connected with the other end of resistance R 8 and the emitter of triode T1 respectively, and triode T1 collector electrode is connected with the transformer TRF primary coil other end; Resistance R 23 and resistance R 21 series connection in the described current foldback circuit, one end of the series circuit that resistance R 23 and resistance R 21 form, an end that is resistance R 21 is by the end of capacitor C 6 with variable resistor VR1, the adjustable side links to each other and links to each other with reference voltage output end Vref, the other end of this series circuit is connected with inverting input and resistance R 24 1 ends of comparison amplifier U1B, resistance R 24 other end ground connection, the junction of resistance R 23 and resistance R 21 connects triode T3 collector electrode, the other end of variable resistor VR1 and resistance R 21, resistance R 22 1 ends link to each other, resistance R 22 other end ground connection, triode T3 base stage connects capacitor C 15 respectively, resistance R 26, resistance R 25 1 ends, resistance R 26 and capacitor C 15 another termination triode T3 emitters and ground, resistance R 25 other ends connect the output of comparison amplifier U1B respectively, resistance R 10, capacitor C 13 1 ends, capacitor C 13 other ends connect the in-phase input end of comparison amplifier U1B respectively, resistance R 20 and capacitor C 14 1 ends, capacitor C 14 other end ground connection, triode T1 emitter in resistance R 20 another termination oscillating circuits, resistance R 10 other ends connect the base stage of triode T2 in the oscillating circuit by diode D2; Capacitor C 11 1 termination transformer TRF secondary coils end of the same name in described voltage doubling rectifing circuit and the filter circuit, capacitor C 11 other ends are leaded up to diode D3 ground connection, another road connects the transformer TRF secondary coil other end and ground respectively by diode D4 and capacitor C 12, the positive pole of resistance R 19 1 terminating diode D4, the end of resistance R 19 other end connecting resistance R14, the two ends of resistance R 14 are respectively by capacitor C 7 and capacitor C 8 ground connection; Capacitor C 9 is in parallel with resistance R 16 in the described voltage sampling circuit, an end of capacitor C 8 in the end of resistance R 16 1 ends difference connecting resistance R15 and the filter circuit, resistance R 15 other ends are high-voltage output end HV, resistance R 16 other ends are connected with resistance R 18 1 ends by resistance R 17, and resistance R 18 other ends are voltage-regulation input Vadj; The negative power end ground connection of comparison amplifier U1A in the described voltage feedback circuit, positive power source terminal respectively with capacitor C 5, capacitor C 10 and resistance R 11 1 ends connect, resistance R 11 another termination in-line power end Vcc, the other end ground connection of capacitor C 5 and capacitor C 10, the in-phase input end connecting resistance R13 of comparison amplifier U1A, capacitor C 17 1 ends, resistance R 13, capacitor C 17 another termination capacitor C 18, resistance R 12 1 ends and ground, the inverting input of comparison amplifier U1A connects capacitor C 16 1 ends, capacitor C 18, an end of resistance R 18 in resistance R 12 other ends and the voltage sampling circuit, the output of another termination comparison amplifier U1A of capacitor C 16, the output of comparison amplifier U1A is taken over diode D2 negative pole in the stream protective circuit by resistance R 9; The control utmost point connecting resistance R2 of controlled a reference source U2, an end of resistance R 3 in the described reference circuit, one end of the anode connecting resistance R3 other end, capacitor C 4 and ground, the other end of negative electrode connecting resistance R2, capacitor C 4 and an end of resistance R 1, and as reference voltage output end Vref, another termination in-line power end Vcc of resistance R 1.
The invention has the beneficial effects as follows: high stability, very low EMI and output ripple; Wide input voltage range; Temperature is floated little, and long-time stability are good; Overall dimension is little, and is in light weight, is easy to install.
Description of drawings
Fig. 1 is a schematic diagram of the present invention and as Figure of abstract.
Fig. 2 is the upward view of Fig. 1.
Fig. 3 is circuit theory diagrams of the present invention.
Embodiment
As shown in Figure 1, 2, 3; Subminiature auto-excitation type high-voltage module power supply special for photomultipliers; the power circuit that comprises encapsulation in the housing; be welded with several pins that draw on the power circuit, power circuit comprises auxiliary circuit, oscillating circuit, current foldback circuit, voltage doubling rectifing circuit, filter circuit, voltage sampling circuit, voltage feedback circuit and the reference circuit that is connected.
Main circuit adopts self-excited oscillation circuit, matches under the rational condition in parameter, can reduce dv/dt and di/dt greatly, and the waveform of this circuit is stable and do not have high order harmonic component, and frequency is made height easily, can reduce EMI and output ripple well.
Two-stage filtering is adopted in output, selects high performance RC for use, reduces output noise.
Select that low noise, low temperature float for use, the benchmark of good stability and components and parts, improve the long-time stability of modular power source.Independent pathway between each ground of guaranteeing to import, export, control; Rational PCB layout; Good transformer production methods etc. are to reduce EMI and output ripple.
Power supply adopts metal shell, and with frame ground, good electromagnetic shielding action is arranged, and improves the antijamming capability of power supply.
Seven are drawn pin and are exposed to outside the housing, one side is five and draws pin by dc supply input Vin, input ground GND, control ground GND, voltage-regulation input Vadj, reference voltage output end Vref sequence arrangement, opposite side is two and draws pin, presses high-voltage output end HV, high pressure output ground GND sequence arrangement.
Operation principle: energized moment, power supply Vin arrives input ground by base stage and emitter, the R8 of D1, L1, R4, R6, T1 pipe, for the T1 pipe provides initial base current, T1 manages conducting, and input voltage is added on the transformer L2, and the electric current that flow through among the L2 this moment grows out of nothing, ascending, current changing rate produces self induction electromotive force for just at the L2 two ends, this electromotive force direction be ' 1 ' just ' 2 ' to bear.By transformer coupled, produce induced electromotive force at the two ends of positive feedback coil L3 simultaneously, the electromotive force direction be ' 3 ' just ' 4 ' to bear.This positive feedback voltage forms the loop by R6, T1, R8, C3, for the T1 pipe provides bigger base current, adds the amplification of T1 pipe, makes the T1 pipe saturated rapidly by conducting, and then makes the electric current among the transformer L2 reach maximum.After this, the induced potential opposite sign of each coil, it be ' 2 ' just ' 1 ' negative that the self induction electromotive force that the L2 two ends produce changes direction, and the electric current among the L2 is descending, and current changing rate is for bearing.By transformer coupled, the induced electromotive force at positive feedback coil L3 two ends also changes direction and just ' 3 ' is bearing for ' 4 ' simultaneously.L3 to adding a reverse voltage between the base stage of T1 pipe and emitter, quickens it by being saturated to conducting by C3, R8, T1, R6, and by being conducting to cut-off state, the electric current among the L2 is zero again.So far finish a cycle of oscillation.Repeat said process, just formed self-oscillation.
The high frequency of oscillation AC signal of elementary generation, by transformer coupled secondary to it, and the two voltage doubling rectifying circuit by forming by C11, C12, D3, D4, produce the high direct voltage of pulsation, pass through the RC filtering of two-stage again, the high direct voltage of output smoothing.
Vadj forms voltage sampling circuit by R18, R17, C9, R16 to high pressure output, and sampled signal removes to control the state of T2 pipe by the voltage negative feedback circuit of compositions such as comparison amplifier U1A, and then the state of control generator.Negative feedback process is as follows: pin1 current potential rising → T2 pipe conducting → T1 pipe of the pin2 current potential decline → U1 of the instantaneous rising → U1 of high pressure output absolute value end → makes the instantaneous decline of high pressure output absolute value.
In addition; in oscillation circuit; R8 had both had electric current series connection negative feedback; it is again the sampling resistor of input current; its overcurrent sampled signal is formed the adjustable given signal of overcurrent with VR1, R21, R22, R23, R24, forms negative feedback by comparison amplifier U1B, also removes to control the state of T2 pipe; and then make the power supply input current not exceed given range, play a protective role.
Claims (2)
1. Subminiature auto-excitation type high-voltage module power supply special for photomultipliers, comprise the power circuit that is encapsulated in the housing, be welded with several pins that draw on the power circuit, it is characterized in that: described power circuit comprises auxiliary circuit, oscillating circuit, current foldback circuit, voltage doubling rectifing circuit, filter circuit, voltage sampling circuit, voltage feedback circuit and reference circuit; Diode D1 positive pole meets dc supply input Vin in the described auxiliary circuit, and diode D1 negative pole is leaded up to capacitor C 1 ground connection, and one the tunnel as in-line power end Vcc, and another road connects capacitor C 2 one ends by inductance L 1, the other end ground connection of capacitor C 2; Resistance R 4 in the described oscillating circuit, resistance R 5 one ends connect, its junction is connected with capacitor C 2 positive poles and transformer TRF primary coil end of the same name in the auxiliary circuit respectively, resistance R 4 other ends lead up to positive feedback coil L3 and capacitor C 3 and triode T2 emitter, one end of resistance R 8 and ground connect, another road is connected with the base stage of triode T1 and the collector electrode of triode T2 respectively by resistance R 6, resistance R 5 other ends are connected with an end of triode T2 base stage and resistance R 7 respectively, the other end of resistance R 7 is connected with the other end of resistance R 8 and the emitter of triode T1 respectively, and triode T1 collector electrode is connected with the transformer TRF primary coil other end; Resistance R 23 and resistance R 21 series connection in the described current foldback circuit, one end of the series circuit that resistance R 23 and resistance R 21 form, an end that is resistance R 21 is by the end of capacitor C 6 with variable resistor VR1, the adjustable side links to each other and links to each other with reference voltage output end Vref, the other end of this series circuit is connected with inverting input and resistance R 24 1 ends of comparison amplifier U1B, resistance R 24 other end ground connection, the junction of resistance R 23 and resistance R 21 connects triode T3 collector electrode, the other end of variable resistor VR1 and resistance R 21, resistance R 22 1 ends link to each other, resistance R 22 other end ground connection, triode T3 base stage connects capacitor C 15 respectively, resistance R 26, resistance R 25 1 ends, resistance R 26 and capacitor C 15 another termination triode T3 emitters and ground, resistance R 25 other ends connect the output of comparison amplifier U1B respectively, resistance R 10, capacitor C 13 1 ends, capacitor C 13 other ends connect the in-phase input end of comparison amplifier U1B respectively, resistance R 20 and capacitor C 14 1 ends, capacitor C 14 other end ground connection, triode T1 emitter in resistance R 20 another termination oscillating circuits, resistance R 10 other ends connect the base stage of triode T2 in the oscillating circuit by diode D2; Capacitor C 11 1 termination transformer TRF secondary coils end of the same name in described voltage doubling rectifing circuit and the filter circuit, capacitor C 11 other ends are leaded up to diode D3 ground connection, another road connects the transformer TRF secondary coil other end and ground respectively by diode D4 and capacitor C 12, the positive pole of resistance R 19 1 terminating diode D4, the end of resistance R 19 other end connecting resistance R14, the two ends of resistance R 14 are respectively by capacitor C 7 and capacitor C 8 ground connection; Capacitor C 9 is in parallel with resistance R 16 in the described voltage sampling circuit, an end of capacitor C 8 in the end of resistance R 16 1 ends difference connecting resistance R15 and the filter circuit, resistance R 15 other ends are high-voltage output end HV, resistance R 16 other ends are connected with resistance R 18 1 ends by resistance R 17, and resistance R 18 other ends are voltage-regulation input Vadj; The negative power end ground connection of comparison amplifier U1A in the described voltage feedback circuit, positive power source terminal respectively with capacitor C 5, capacitor C 10 and resistance R 11 1 ends connect, resistance R 11 another termination in-line power end Vcc, the other end ground connection of capacitor C 5 and capacitor C 10, the in-phase input end connecting resistance R13 of comparison amplifier U1A, capacitor C 17 1 ends, resistance R 13, capacitor C 17 another termination capacitor C 18, resistance R 12 1 ends and ground, the inverting input of comparison amplifier U1A connects capacitor C 16 1 ends, capacitor C 18, an end of resistance R 18 in resistance R 12 other ends and the voltage sampling circuit, the output of another termination comparison amplifier U1A of capacitor C 16, the output of comparison amplifier U1A is taken over diode D2 negative pole in the stream protective circuit by resistance R 9; The control utmost point connecting resistance R2 of controlled a reference source U2, an end of resistance R 3 in the described reference circuit, one end of the anode connecting resistance R3 other end, capacitor C 4 and ground, the other end of negative electrode connecting resistance R2, capacitor C 4 and an end of resistance R 1, and as reference voltage output end Vref, another termination in-line power end Vcc of resistance R 1.
2. Subminiature auto-excitation type high-voltage module power supply special for photomultipliers according to claim 1, it is characterized in that: described several pins that draw are exposed to outside the housing, one side is five and draws pin by dc supply input Vin, input ground GND, control ground GND, voltage-regulation input Vadj, reference voltage output end Vref sequence arrangement, opposite side is two and draws pin, presses high-voltage output end HV, high pressure output ground GND sequence arrangement.
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| CN2009100708160A CN101694965B (en) | 2009-10-16 | 2009-10-16 | Subminiature auto-excitation type high-voltage module power supply special for photomultipliers |
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| CN2009100708160A CN101694965B (en) | 2009-10-16 | 2009-10-16 | Subminiature auto-excitation type high-voltage module power supply special for photomultipliers |
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| CN101694965B true CN101694965B (en) | 2011-12-07 |
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| CN101814839B (en) * | 2010-05-06 | 2011-12-07 | 天津市东文高压电源厂 | Modular power supply for insulating fixed symmetrical output high voltage |
| US8704504B2 (en) * | 2010-09-03 | 2014-04-22 | Semiconductor Energy Laboratory Co., Ltd. | Power supply circuit comprising detection circuit including reference voltage circuits as reference voltage generation circuits |
| CN102299640B (en) * | 2011-09-19 | 2013-08-14 | 东文高压电源（天津）有限公司 | Self-excitation small-power negative-high-voltage modular power supply consisting of adjustable voltage regulator |
| CN103579217B (en) * | 2013-11-08 | 2017-02-08 | 天水天光半导体有限责任公司 | Power module packaged in ultra-small mode and packaging method thereof |
| CN105429456A (en) * | 2015-12-19 | 2016-03-23 | 天津光电惠高电子有限公司 | Small-volume negative high voltage power supply for photomultiplier tube and manufacturing method thereof |
| CN105553276B (en) * | 2015-12-28 | 2018-07-24 | 天津市森特尔新技术有限公司 | A kind of high-precision high voltage module |
| CN107562107A (en) * | 2017-09-30 | 2018-01-09 | 中科和光（天津）应用激光技术研究所有限公司 | A kind of driving bias circuit with feedback protection |
| CN108923800B (en) * | 2018-09-18 | 2021-05-04 | 安顺迪讯科技有限公司 | Wireless energy-carrying communication system and method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5864472A (en) * | 1997-03-24 | 1999-01-26 | Ault Incorporated | Apparatus for controlling a multiresonant self-oscillating converter circuit |
| CN2523108Y (en) * | 2002-01-25 | 2002-11-27 | 毛灿豪 | Self-excited vibration flyback switching power source |
| CN1996732A (en) * | 2005-11-28 | 2007-07-11 | 松下电器产业株式会社 | Switch power device and semiconductor device using same |
| CN201523326U (en) * | 2009-10-16 | 2010-07-07 | 天津市东文高压电源厂 | Special high voltage module power supply for sub-miniature self-excited photomultiplier tube |
-
2009
- 2009-10-16 CN CN2009100708160A patent/CN101694965B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5864472A (en) * | 1997-03-24 | 1999-01-26 | Ault Incorporated | Apparatus for controlling a multiresonant self-oscillating converter circuit |
| CN2523108Y (en) * | 2002-01-25 | 2002-11-27 | 毛灿豪 | Self-excited vibration flyback switching power source |
| CN1996732A (en) * | 2005-11-28 | 2007-07-11 | 松下电器产业株式会社 | Switch power device and semiconductor device using same |
| CN201523326U (en) * | 2009-10-16 | 2010-07-07 | 天津市东文高压电源厂 | Special high voltage module power supply for sub-miniature self-excited photomultiplier tube |
Non-Patent Citations (1)
| Title |
|---|
| JP平7-46835A 1995.02.14 |
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Owner name: TIANJIN DONGWEN HIGH-VOLTAGE POWER SUPPLY CO., LTD Free format text: FORMER OWNER: TIANJIN DONGWEN HIGH VOLTAGE POWER SUPPLY FACTORY Effective date: 20120615 |
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Effective date of registration: 20120615 Address after: 300171, blue mansion, No. eleven, No. 47, Hedong Road, Hedong District, Tianjin, 8F Patentee after: Tianjin Dongwen High Voltage Power Supply Plant Address before: 300171, blue mansion, No. eleven, No. 47, Hedong Road, Hedong District, Tianjin, 8F Patentee before: Tianjin Dongwen High Voltage Power Supply Factory |
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Owner name: DONGWEN HIGH VOLTAGE POWER SUPPLY (TIANJIN) CO., L Free format text: FORMER NAME: TIANJIN DONGWEN HIGH-VOLTAGE POWER SUPPLY CO., LTD. |
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Address after: 300220, Tianjin, Hexi District, 20 Dongting Road, Chen Tong Technology Business District Service Center 415-3 Patentee after: Wen Dong high voltage power supply (Tianjin) Limited by Share Ltd Address before: 300171, blue mansion, No. eleven, No. 47, Hedong Road, Hedong District, Tianjin, 8F Patentee before: Tianjin Dongwen High Voltage Power Supply Plant |