CN2365706Y - High voltage power source using for precision photoelectric measurement - Google Patents
High voltage power source using for precision photoelectric measurement Download PDFInfo
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- CN2365706Y CN2365706Y CN 98252152 CN98252152U CN2365706Y CN 2365706 Y CN2365706 Y CN 2365706Y CN 98252152 CN98252152 CN 98252152 CN 98252152 U CN98252152 U CN 98252152U CN 2365706 Y CN2365706 Y CN 2365706Y
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- voltage
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Abstract
The utility model relates to a high-voltage power source using for precision photoelectric measurement, which provides high-voltage power supply with high stability for a photoelectric sensor and belongs to the field of photoelectric measurement. The utility model comprises an adjustable three-end voltage stabilizer, a transistor, an oscillator, a voltage booster, a rectifying wave-filter circuit, a feedback sampling circuit, an error amplifying circuit and a reference source. The utility model utilizing the adjustable three-end voltage stabilizer overcomes the problem of the prior art that the output of an adjusting element changes following the change of the input, causing the poor stability of the output of the high voltage. The utility model is characterized in that on one hand, the adjustable three-end voltage stabilizer self can adjust the change of low-voltage input, and on the other hand, the adjustable three-end voltage stabilizer carries out closed-loop adjustment according to the feedback of the change of other factors of a closed-loop control circuit to the adjusting end of the adjustable three-end voltage stabilizer. The utility model has the advantages that the adjustment is convenient; the cost is low; due to the double-adjusting function of the adjusting element, the stability of output high voltage is further enhanced.
Description
The utility model belongs to the photoelectric measurement field, and a kind of high-voltage power supply of the high stability that provides for photoelectric sensor is provided.
The kind of high-voltage power supply is a lot, adopts transistor BG to adjust element as shown in Figure 1 usually, as seen from Figure 1 as the low pressure V that imports
iWhen changing, adjust the output voltage V of element
tAlso change, make high pressure output V
oConstant have only by closed-loop control adjustment voltage V
eThe conducting resistance of promptly regulating triode realizes.Hence one can see that, and the high-voltage power supply input voltage of this structure can have influence on the variation of output voltage, i.e. output voltage V when changing
oDegree of stability be subjected to influence, the high-voltage power supply less stable of this structure, the systematic parameter adjustment also more complicated of getting up.
The utility model purpose is to improve the stability of high-voltage power supply and make the systematic parameter adjustment simple.
Detailed content of the present utility model is as shown in Figure 2: it comprises three-port variable voltage regulator 1, transistor 2, oscillator 3, stepup transformer 4, current rectifying and wave filtering circuit 5, feedback sample circuit 6, error amplifier 7 and reference source 8.
Low pressure U
iBe directly inputted on the input end of three-port variable voltage regulator 1, receive on the emitter of transistor 2 adjustable side of three-port variable voltage regulator 1, the collector of transistor 2 connects signal ground, the output of three-port variable voltage regulator 1 links to each other with the power end of oscillator 3, the output terminal of oscillator 3 is received on the input end of stepup transformer 4, the output terminal of stepup transformer 4 links to each other with the input end of current rectifying and wave filtering circuit 5, and the output of current rectifying and wave filtering circuit 5 promptly is the output voltage U of high-voltage power supply
o, the high pressure U of 6 pairs of outputs of while feedback sample circuit
oCarry out the feedback sample (voltage U of sampling value and reference source 8 by a certain percentage
zRelevant), the output terminal of feedback sample circuit 6 is received on the inverting input of error amplifier 7, and the in-phase input end of error amplifier 7 connects the output terminal of reference source 8, and the output terminal of error amplifier 7 links to each other with the base stage of transistor 2 and constitutes closed control circuit.
Principle of work of the present utility model: input dc low-voltage U
iBehind three terminal regulator 1, oscillator 3, become pulsating wave, boost, through current rectifying and wave filtering circuit 5 output high direct voltage U by stepup transformer 4
o, pass through closed-loop control stable high voltage U again
oOutput.Work as voltage U
i, U
oVoltage U when more stable
f≈ U
z, voltage U
eBe certain value voltage U then
tConstant, high pressure U
oAlso constant.Low pressure U when input
iWhen changing, because the effect of three terminal regulator makes voltage U
tDo not change, then high pressure U
oOutput does not change yet.Simultaneously thereby the closed control circuit other factors changes also and can carry out the stability that closed loop adjustment guarantees high pressure by the adjustment end that feedback sample circuit 6 feeds back to three-port variable voltage regulator 1.
Good effect of the present utility model: utilize three-port variable voltage regulator to adjust element, this structure has overcome element output changes the high pressure output stability difference that is caused with input the problem of adjusting in the prior art, three-port variable voltage regulator has dual corrective action: self can regulate the variation of low pressure input on the one hand, the adjustment end that also variation of other factors of closed control circuit can be fed back to three-port variable voltage regulator on the other hand carries out closed loop adjustment.This high-voltage power supply is simple in structure, easy to adjust, cost is low, has the stability that the dual regulation effect has further improved the output high pressure owing to adjust element.
Description of drawings: Fig. 1 is the theory structure synoptic diagram of prior art.
Fig. 2 is a theory structure synoptic diagram of the present utility model.
The utility model most preferred embodiment: three-port variable voltage regulator 1 adopts LM317.Transistor 2 adopts 3CG14C.Oscillator 3 is time base circuit 555 chips, also can adopt lc circuit.Stepup transformer 4 is the normal pulsed transformer, and no-load voltage ratio depends on the needs, as far as possible disorderly around.Current rectifying and wave filtering circuit 5 can be made of (four voltage multiplying rectifiers) high-voltage capacitance and diode.Feedback sample circuit 6 is made up of the precision resistance of temperature coefficient complementation.Error amplifier 7 is made of low drift amplifier.Reference source is LM399 or uses stabilivolt.
Claims (1)
1. one kind is used for the high-voltage power supply that high precision photoelectric is measured, it comprises: stepup transformer 4, current rectifying and wave filtering circuit 5, feedback sample circuit 6, error amplifier 7 and reference source 8, it is characterized in that also comprising: receive on the emitter of transistor 2 adjustable side of three-port variable voltage regulator 1, the collector of transistor 2 connects signal ground, the output of three-port variable voltage regulator 1 links to each other with the power end of oscillator 3, and the output terminal of error amplifier 7 links to each other with the base stage of transistor 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98252152 CN2365706Y (en) | 1998-12-28 | 1998-12-28 | High voltage power source using for precision photoelectric measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98252152 CN2365706Y (en) | 1998-12-28 | 1998-12-28 | High voltage power source using for precision photoelectric measurement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2365706Y true CN2365706Y (en) | 2000-02-23 |
Family
ID=33995881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98252152 Expired - Fee Related CN2365706Y (en) | 1998-12-28 | 1998-12-28 | High voltage power source using for precision photoelectric measurement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2365706Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106502296A (en) * | 2016-12-15 | 2017-03-15 | 重庆川仪自动化股份有限公司 | D.C. regulated power supply output circuit and method |
| CN108472007A (en) * | 2015-11-02 | 2018-08-31 | 皇家飞利浦有限公司 | The active distributed of high-voltage power supply for ultrasonic transducer |
-
1998
- 1998-12-28 CN CN 98252152 patent/CN2365706Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108472007A (en) * | 2015-11-02 | 2018-08-31 | 皇家飞利浦有限公司 | The active distributed of high-voltage power supply for ultrasonic transducer |
| CN106502296A (en) * | 2016-12-15 | 2017-03-15 | 重庆川仪自动化股份有限公司 | D.C. regulated power supply output circuit and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |