CN203504440U - Large-power linear-output high voltage stabilizing device - Google Patents
Large-power linear-output high voltage stabilizing device Download PDFInfo
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- CN203504440U CN203504440U CN201320621502.7U CN201320621502U CN203504440U CN 203504440 U CN203504440 U CN 203504440U CN 201320621502 U CN201320621502 U CN 201320621502U CN 203504440 U CN203504440 U CN 203504440U
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Abstract
The utility model relates to a large-power linear-output high voltage stabilizing device which comprises a sine wave generation circuit, a sinusoidal wave amplitude amplifying circuit, a primary power amplifying circuit, a push-pull power amplifying circuit, a step-up transformer, a high voltage rectification and filter circuit, a high voltage dc output interface, a current collection circuit, a voltage collection circuit, and a voltage and current display. The sine wave generation circuit, the sinusoidal wave amplitude amplifying circuit, the primary power amplifying circuit, the push-pull power amplifying circuit, the step-up transformer, the high voltage rectification and filter circuit and the high voltage dc output interface are successively connected; the current collection circuit and the voltage collection circuit are respectively connected with an MCU and an overvoltage and overcurrent protection circuit; and the voltage and current display is mutually connected with the MCU. The large-power linear-output high voltage stabilizing device provided by the utility model is high in reliability, accuracy and output power.
Description
Technical field
The utility model belongs to electricity field, relates to a kind of high-power high voltage stabilized voltage power supply, relates in particular to a kind of high-power linear output high-pressure installation.
Background technology
Conventionally use high voltage regulated power supply to encourage as energy carrying out photodetection subject and the field of nuclear medicine with photomultiplier.Photomultiplier needs the high voltage regulated power supply of high stability as excitation, could effectively realize opto-electronic conversion, and when fluctuation appears in voltage, photomultiplier also there will be fluctuation, and test result is inconsistent.At the field of nuclear medicine, conventionally need high-power high voltage power supply to realize the separation of ion.But due to the research starting evening in domestic these two fields, supporting high-performance high voltage regulated power supply can only rely on import with it, and its key technology is also in blocked styate.
Current domestic high voltage source mainly contains two kinds: a kind of is that directly 220V civil power is carried out to voltage multiplying rectifier is converted to civil power the equipment of high voltage direct current; Another kind is with signal generating unit, to produce the low voltage pulse signal of characteristic frequency, by push-pull power amplifier circuit, by step-up transformer, become high-voltage AC signal, mode by voltage multiplying rectifier becomes high-voltage AC signal into direct current signal again, when needs regulate output voltage, the pulsewidth that conventionally adopts PWM mode paired pulses ripple is adjusted and is changed output direct current signal peak value.The latter is the high voltage regulated power supply of present stage main flow.
Directly 220V civil power is carried out to voltage multiplying rectifier civil power is converted to high voltage direct current, this equipment can not be avoided the impact of city's electro-mechanical wave, and conventionally city's electro-mechanical wave is in ± 10%, so its defect is there is no voltage stabilizing measure, and power supply output stability is poor.In addition, the output current ability of voltage multiplying rectifier mode is only decided by the capacitance of multiplication of voltage link use electric capacity, conventionally can bear the capacitor's capacity less than 10 μ F of kilovolt high pressure, the not enough 1mA of current capacity of final output, and power output is very limited.
With the power amplification of action of low-voltage pulse AC signal, through boost transformation again the mode of voltage multiplying rectifier obtain high-voltage dc signal, although this mode can be controlled to input signal, power-supply fluctuation while avoiding directly using civil power, but this power supply is to adopt the pulsewidth adjustment of PWM paired pulses ripple change output direct current signal peak value and output voltage is carried out to voltage stabilizing by pulse signals, it is a kind of switch control mode, power supply output ripple is very large, load meeting to output has a significant impact, while especially carrying out precision detection and the field of nuclear medicine research with photomultiplier, this ripple effect can have a strong impact on test correctness.Moreover, its output current is decided by that the capacitance of power amplification link electric current amplifying power, transformer turn ratio and voltage multiplying rectifier link use electric capacity determines jointly, output current ability is also very limited, and the maximum current capability of the high voltage regulated power supply that current this mode realizes when 2000V exports is 10mA.Particularly, at medical domain, often need the power supply of high-power, it is unable to do what one wishes that the load capacity of this high voltage regulated power supply can seem.
Utility model content
In order to solve existing technical problem in background technology, meet the demand of photomultiplier photodetection and nuclear medicine studies, the utility model proposes a kind of high-power linear output high-pressure installation and method.
The technical solution of the utility model is:
1. high-power linearity is exported a high voltage stabilizing device, and its special character is: comprise string wave generation circuit, sinusoidal wave range amplifier circuit, prime power amplifying circuit, push-pull power amplifier circuit, step-up transformer, high-voltage rectifying filter circuit, the high voltage direct current output interface connecting successively and current collection circuit and the voltage collection circuit being connected with over-voltage over-current protection circuit with MCU respectively; Also comprise with the interconnective electric current and voltage of MCU and showing.
Above-mentioned MCU also interconnects with voltage controlled gain regulating circuit; Described voltage controlled gain regulating circuit also respectively with circuit is manually set and sinusoidal wave range amplifier circuit interconnects.
Above-mentioned push-pull power amplifier circuit is comprised of a NPN large power triode and a PNP large power triode.
The beneficial effects of the utility model are:
1. improve stability.The utility model utilizes the local sine wave producing as source signal, does not directly use on the one hand civil power, the unsteadiness of having avoided city's electro-mechanical wave to cause; On the other hand, the ripple that cannot eliminate that does not exist pulse signal switching process to introduce.
2. improve precision.The utility model has added voltage controlled gain amplifying circuit, changes the control voltage of voltage controlled gain amplifying circuit, realizes the linear regulation to the amplitude of alternating voltage, and degree of regulation is high.
3. high-power output.The utility model has adopted 2 grades of power amplifications, and the peak-to-peak value of sinusoidal signal is amplified to 66V, and drive current is amplified to 8A, has guaranteed the prerequisite of high-power output.
4. the elementary over-voltage over-current protection circuit that is serially connected with of step-up transformer in the utility model, when there is overvoltage and overcurrent condition, disconnecting transformer is come in and gone out automatically, has protected load.
5. the secondary output AC high pressure of step-up transformer of the present utility model sine wave adopts the π type filtering that inductance and electric capacity form after rectification, good wave filtering effect, power output depends on the input power of step-up transformer, has avoided the output current restriction that adopts voltage multiplying rectifier mode to cause.
6. in the utility model, in high direct voltage output stage, add voltage acquisition and current collection circuit, output voltage and load current are gathered, and send data to MCU.
7. the MCU in the utility model is integrated pid algorithm, using voltage acquisition and current acquisition data as feedback, regulates the control voltage of voltage controlled gain regulating circuit according to result of calculation, changes the amplitude of sinusoidal signal, realizes that closed loop is accurate to be controlled.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation;
Wherein 1-string wave generation circuit, the sinusoidal wave range amplifier circuit of 2-, 3-prime power amplifying circuit, 4-push-pull power amplifier circuit, 5-step-up transformer, 6-high-voltage rectifying filter circuit, 7-high voltage direct current output interface, 8-current collection circuit, 9-voltage collection circuit, 10-MCU, the demonstration of 11-electric current and voltage, 12-voltage controlled gain regulating circuit, 13-manually arrange circuit, 14-over-voltage over-current protection circuit.
Embodiment
Referring to Fig. 1, a kind of high-power linear output high voltage source, is specifically implemented as follows:
(1) sine wave generation circuit generation frequency is the sine wave that 200Hz, peak value are 2V;
(2) sinusoidal wave amplifying circuit amplifies by the amplitude of operational amplifier offset of sinusoidal ripple, amplifier employing ± 12V power supply, and voltage controlled gain regulating circuit changes the gain that sinusoidal wave amplitude is amplified, amplitude adjusted scope 0～22V;
(3) voltage controlled gain regulating circuit, by field effect transistor as core, by changing the magnitude of voltage of grid and source electrode, regulates the conducting resistance of drain electrode and source electrode; This field effect transistor is sealed in to the feedback end of amplitude amplifying circuit amplifier, realized the adjusting of voltage controlled gain;
(4) the control voltage that changes voltage controlled gain regulating circuit is manually set, makes linear change of amplitude gain amplifier of sinusoidal wave range amplifier circuit;
(5) sinusoidal wave after range amplifier circuit, amplitude realizes the adjusting of 0～22V, but because amplifier does not have current driving ability, now sinusoidal wave is a simple ac voltage signal.This voltage signal amplifies the amplification that realizes voltage and current through prime power amplifying circuit.Prime power amplifying circuit adopts large power triode as core devices, realizes the strong driving force AC signal that sinusoidal wave peak-to-peak value 0～66V, drive current reach 2A;
(6) push-pull power amplifier circuit is comprised of a NPN large power triode and a PNP large power triode, the performance parameter of this pair of pipes is basically identical, sine wave after realization is amplified prime power is without the power amplification of intermodulation distortion, voltage amplification factor is 1, and current driving ability reaches 8A;
(7) sine wave after recommending amplification by step-up transformer (turn ratio is 1:100) after, the low-voltage ac signal that is A by amplitude boosts to 100 * A, current transformation is the high-voltage AC signal of 1/100 primary current, step-up transformer is when completing and boosting, low pressure and high-pressure section are realized to electrical isolation, make not influence each other between it, the flip-flop of simultaneously removing low-voltage circuit part, makes its secondary output stage only have high-voltage AC signal;
(8) high pressure sine wave becomes direct voltage after rectification and the filtering of π type;
(9) voltage sampling circuit is in parallel with power output end, and the electric resistance partial pressure sampling identical by a plurality of resistances gathers the voltage of output, and after A/D, sends sampling voltage value to MCU; If output end voltage is higher than set point, overvoltage crowbar cuts off the input of step-up transformer primary voltage, reaches the object of protection load end;
(10) current sampling circuit is connected with power output end, realizes current/voltage value change by amplifier, and this magnitude of voltage sends MCU to after A/D; If output end current is higher than set point, current foldback circuit cuts off the input of step-up transformer primary voltage, reaches the object of protection load end;
(11) MCU receives from data, voltage acquisition data and current acquisition data are manually set; When manually arranging when effective, MCU receives from circuit data is manually set, and settings power transmission current voltage display circuit is shown, will after data D/A, magnitude of voltage be carried in to the amplitude that voltage controling end that voltage controlled gain regulates is controlled sine wave output simultaneously; Press after output button until manually setting completed, MCU receiver voltage and current acquisition data, regulate the voltage of voltage controlled gain end according to pid algorithm, realize the object of voltage stabilizing;
(12) design limit of this utility model is that output voltage 0～2970V, maximum load current are 80mA, and in order to leave surplus, the overvoltage protection of the actual use of this utility model is set to 2500V, overcurrent protection is set to 50mA; Through actual test, under 2500V High voltage output, 50mA current load ability, ripple < 1.2 * 10
-5± 30mV; Source effect is 1 * 10
-5± 26mV, load effect is 1 * 10
-5± 50mV.
Claims (3)
1. a high-power linear output high voltage stabilizing device, is characterized in that: comprise string wave generation circuit, sinusoidal wave range amplifier circuit, prime power amplifying circuit, push-pull power amplifier circuit, step-up transformer, high-voltage rectifying filter circuit, the high voltage direct current output interface connecting successively and current collection circuit and the voltage collection circuit being connected with over-voltage over-current protection circuit with MCU respectively; Also comprise with the interconnective electric current and voltage of MCU and showing.
2. a kind of high-power linear output high voltage stabilizing device according to claim 1, is characterized in that: described MCU also interconnects with voltage controlled gain regulating circuit; Described voltage controlled gain regulating circuit also respectively with circuit is manually set and sinusoidal wave range amplifier circuit interconnects.
3. a kind of high-power linear output high voltage stabilizing device according to claim 2, is characterized in that: described push-pull power amplifier circuit is comprised of a NPN large power triode and a PNP large power triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320621502.7U CN203504440U (en) | 2013-09-30 | 2013-09-30 | Large-power linear-output high voltage stabilizing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320621502.7U CN203504440U (en) | 2013-09-30 | 2013-09-30 | Large-power linear-output high voltage stabilizing device |
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| Publication Number | Publication Date |
|---|---|
| CN203504440U true CN203504440U (en) | 2014-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320621502.7U Expired - Fee Related CN203504440U (en) | 2013-09-30 | 2013-09-30 | Large-power linear-output high voltage stabilizing device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103501123A (en) * | 2013-09-30 | 2014-01-08 | 中国科学院西安光学精密机械研究所 | High power linear output high voltage stabilizing device and high power linear output high voltage stabilizing method |
| CN107831205A (en) * | 2017-10-27 | 2018-03-23 | 广东顺德工业设计研究院(广东顺德创新设计研究院) | Micro-fluidic electrophoretic apparatus |
-
2013
- 2013-09-30 CN CN201320621502.7U patent/CN203504440U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103501123A (en) * | 2013-09-30 | 2014-01-08 | 中国科学院西安光学精密机械研究所 | High power linear output high voltage stabilizing device and high power linear output high voltage stabilizing method |
| CN107831205A (en) * | 2017-10-27 | 2018-03-23 | 广东顺德工业设计研究院(广东顺德创新设计研究院) | Micro-fluidic electrophoretic apparatus |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140326 Termination date: 20170930 |
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| CF01 | Termination of patent right due to non-payment of annual fee |