CN204216790U - A Programmable Scanning Power Supply - Google Patents
A Programmable Scanning Power Supply Download PDFInfo
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- CN204216790U CN204216790U CN201420667951.XU CN201420667951U CN204216790U CN 204216790 U CN204216790 U CN 204216790U CN 201420667951 U CN201420667951 U CN 201420667951U CN 204216790 U CN204216790 U CN 204216790U
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Abstract
The utility model provides a kind of scanning power supply able to programme, belongs to power circuit technical field.It solve the power that prior art scanning power supply power output pipe bears comparatively large, the problem that reliability is low.This scanning power supply able to programme is connected to and comprises: Electromagnetic interference filter, band high power correcting full bridge rectification filtering unit, Full-Bridge Buck unit and full-bridge inverting frequency sweep unit, Electromagnetic interference filter, full-bridge rectifier filter unit, full-bridge recommends pressure unit and full-bridge inverting frequency sweep unit is connected between electric main and load respectively successively, also comprise a control unit, control unit input is connected between full-bridge inverting frequency sweep unit and load, first output is connected to full-bridge and recommends pressure unit and realize high-voltage dc voltage be converted to high-frequency pulse voltage to drive full-bridge to recommend pressure unit, second output is connected to full-bridge inverting frequency sweep unit and realizes exporting specific currents peak value and the triangular wave in cycle to drive full-bridge inverting frequency sweep unit.This power supply has strong reliability.
Description
Technical field
The utility model belongs to power circuit technical field, relates to a kind of scanning power supply able to programme.
Background technology
Current scanline power supply is used daily life, industrial production, scientific research and military affairs widely, such as, field scan power supply in early stage picture tube, the medium/high frequency induction heater of industry, medical nulcear magnetic resonance (NMR), irradiation accelerator, the equipment such as high-frequency and high-voltage high-power electron irradiation accelerator (dynamitron) magnetization curve mensuration.It is adjustable that scanning power supply has current strength, and instantaneous power is large, and electrical load is inductance coil, and is applied to the feature of effective object in this, as action medium.The product type of at present relevant scanning power supply is enriched, and brings great contribution for social development.
Chinese patent document discloses a kind of scanning power supply for generation of class triangular wave exciting current that application number is CN201410290525., this power supply is connected between electric main and load, comprise: the power pressurizer voltage transitions of electric main being become a direct-flow steady voltage, one to be connected between described power pressurizer and load and direct-flow steady voltage to be converted to the direct current transducer of output voltage; The waveform generator of one generation class triangular signal and control circuit.Control circuit first input end is connected to waveform generator to receive class triangular signal, second input is connected to load to receive load current, output connects direct current transducer to drive the output voltage of direct current transducer, and this power supply solves the defect that load current can change along with load variations.But this scanning power supply also also exists following defect: the power that (1) power output pipe bears is comparatively large, and reliability is low; (2) circuit protection only considers that the possibility of accident appears in power output stage, more weak to the protective capability of sweep generator.
Summary of the invention
The power that the scanning power supply power output pipe that the utility model exists for existing technology bears is larger, the problem that reliability is low, propose a kind of scanning power supply able to programme, this scanning power supply effectively can suppress the factors such as magnet parameter, environmental change on the impact of sweep current, have strong reliability.
The utility model is realized by following technical proposal: a kind of scanning power supply able to programme, is connected between electric main and load, it is characterized in that, this scanning power supply comprises: electric main input voltage is carried out the Electromagnetic interference filter of filtering by one, the voltage that Electromagnetic interference filter exports is carried out the band high power correcting full bridge rectification filtering unit of rectifying and wave-filtering output smoothing high voltage direct current by one, one Full-Bridge Buck unit high voltage direct current being converted to low-voltage DC, one full-bridge inverting frequency sweep unit low-voltage DC being carried out the triangular wave in inversion generation current peak value and cycle, described Electromagnetic interference filter, band high power correcting full bridge rectification filtering unit, Full-Bridge Buck unit and full-bridge inverting frequency sweep unit are connected between electric main and load respectively successively, this scanning power supply comprises and also comprises a control unit, described control unit input is connected between full-bridge inverting frequency sweep unit and load with receiver voltage, current feedback signal, first output is connected to Full-Bridge Buck unit and is converted to high-frequency pulse voltage to drive Full-Bridge Buck unit to realize high-voltage dc voltage, second output is connected to full-bridge inverting frequency sweep unit and realizes exporting specific currents peak value and the triangular wave in cycle to drive full-bridge inverting frequency sweep unit.
Electric main input voltage carries out electrical network filtering through Electromagnetic interference filter and obtains level and smooth high voltage direct current by band high power correcting full bridge rectification filtering unit again, high voltage direct current exports low-voltage DC after Full-Bridge Buck unit converts high-frequency ac voltage to direct voltage and carries out step-down rectifier filtering, and low-voltage DC controls full-bridge inverting frequency sweep unit through the wide modulation technique of pulse to carry out inversion and export specific currents peak value and the triangular wave in cycle.Electric power outputting current, voltage are inputed to control unit through sampling as feedback quantity, control unit can compare rear control Full-Bridge Buck unit according to the reference waveform of setting and feedback current, voltage data and full-bridge inverting frequency sweep unit exports and reference waveform is similar to the triangular wave with specific current value and cycle simultaneously.Thus realize the output of triangular voltage sweep source current.Also a closed-loop control system is formed thus.This scanning power supply effectively can suppress the factors such as magnet parameter, environmental change on the impact of sweep current, have strong reliability.
In above-mentioned scanning power supply able to programme, described control unit comprises current/voltage and detects feedback circuit, PWM controller, drive circuit and auxiliary power circuit, described current/voltage detects feedback circuit and to be connected between the output of full-bridge inverting frequency sweep unit and load and to feed back to PWM controller, described auxiliary power circuit connects electric main to PWM controller and drive circuitry, and described PWM controller connects Full-Bridge Buck unit and full-bridge inverting frequency sweep unit respectively by drive circuit simultaneously.PWM controller received current, voltage feedback signal and reference waveform realize pwm pulse by driver element control Full-Bridge Buck unit and full-bridge inverting frequency sweep unit and control.Thus the object of powering load that the stable output reliable current realizing track reference waveform reaches.
In above-mentioned scanning power supply able to programme, described Full-Bridge Buck unit comprises power inverter, reducing transformer and the auxiliary rectifier filter circuit that full-bridge type is become by set of power switches, described power inverter, step-down transformer are connected successively with auxiliary rectifier filter circuit, and the input connecting band high power correcting full bridge rectification filtering unit of described power inverter, described auxiliary rectifier filter circuit output connects full-bridge inverting frequency sweep unit, and the first output of above-mentioned control unit connects power inverter control end.
Here the effect of power inverter is that high-voltage dc voltage is converted to high-frequency pulse voltage; High-frequency pulse voltage carries out step-down through step-down transformer, and the pulse voltage of high frequency is converted to stable VD through auxiliary rectifier filter circuit by step-down transformer secondary output voltage; Control unit will control the width of the driving pulse of device for power switching according to the current/voltage sampling feedback signal exported, thus adjustment service time is to make output voltage adjustable and stable.
In above-mentioned scanning power supply able to programme, described band high power correcting full bridge rectification filtering unit comprises high-power factor correcting circuit, and described high-power factor correcting circuit comprises UCC28019 power factor correction chip.Here power line harmonics is reduced to greatest extent by increasing power factor correction.
In above-mentioned scanning power supply able to programme, described PWM controller is also connected with display and input unit.Here can carry out selecting different reference waveforms by input unit, and show.
In above-mentioned scanning power supply able to programme, described current/voltage detects feedback circuit and comprises Hall current sensor and voltage detector, and described Hall element and voltage detector are connected the output of full-bridge inverting frequency sweep unit and the input of PWM controller respectively.
In above-mentioned scanning power supply able to programme, described drive circuit comprises raster data model optical coupler, and said PWM controller connects Full-Bridge Buck unit and full-bridge inverting frequency sweep unit by raster data model optical coupler.Here PWM controller drives Full-Bridge Buck unit and full-bridge inverting frequency sweep cell power switching device by raster data model optical coupler, has the effect of protection device for power switching.
In above-mentioned scanning power supply able to programme, described PWM controller is STM2 Series of MCU.STM2 series, based on aiming at the Embedded Application custom-designed ARM Cortex-M kernel requiring high-performance, low cost, low-power consumption, realizes high-performance with low-voltage, effectively extends the charging room of battery supply set.
Compared with prior art, the utility model scanning power supply able to programme has the following advantages:
1, the utility model adopts four-quadrant converter topological structure by main circuit, and high frequency modulated ripple is under load inductance effect, and output low frequency sweep current, reaches the object of powering to magnet exciting coil.Owing to adopting negative-feedback technology, output current by strict track reference waveform, thus effectively suppresses the factors such as magnet parameter, environmental change on the impact of sweep current.
2, the utility model reference waveform is a waveform able to programme, can realize the optimum Match of sweep current and load.
Accompanying drawing explanation
Fig. 1 is circuit block diagram of the present utility model;
Fig. 2 is the utility model full-bridge inverting frequency sweep element circuit figure;
Fig. 3 is the utility model Full-Bridge Buck element circuit figure;
In figure 1, Electromagnetic interference filter; 2, high power correcting full bridge rectification filtering unit is with; 4, Full-Bridge Buck unit; 41, power inverter; 42, step-down transformer; 43, auxiliary rectifier filter circuit; 5, full-bridge inverting frequency sweep unit; 6, control unit; 61, auxiliary power circuit; 62, drive circuit; 63, PWM controller; 64, current/voltage detects feedback circuit; 65, display and input unit.
Embodiment
Be below specific embodiment of the utility model, and by reference to the accompanying drawings the technical solution of the utility model be further described, but the utility model is not limited to these embodiments.
As Figure 1-3, this scanning power supply able to programme is connected between electric main and load, this scanning power supply comprises: an Electromagnetic interference filter 1 of electric main input voltage being carried out filtering, one voltage Electromagnetic interference filter 1 exported carries out the band high power correcting full bridge rectification filtering unit 2 of rectifying and wave-filtering output smoothing high voltage direct current, the one Full-Bridge Buck unit 4 high voltage direct current being converted to low-voltage DC, the one full-bridge inverting frequency sweep unit 5 low-voltage DC being carried out the triangular wave in inversion generation current peak value and cycle, Electromagnetic interference filter 1, band high power correcting full bridge rectification filtering unit 2, Full-Bridge Buck unit 4 and full-bridge inverting frequency sweep unit 5 are connected between electric main and load respectively successively, band high power correcting full bridge rectification filtering unit 2 comprises high-power factor correcting circuit, high-power factor correcting circuit comprises UCC28019 power factor correction chip.Here power line harmonics is reduced to greatest extent by increasing power factor correction.High-power factor correcting circuit is also referred to as pfc circuit.Electromagnetic interference filter 1 is called for short electromagnetic interface filter.Electromagnetic interface filter plays the effect of two low pass filters: one is attenuation common-mode interference, and another is decay differential mode interference.Electromagnetic interface filter can in stopband range attenuating RF energy, and make power frequency undamped, or little decay, just by EMI power-supply filter.
This scanning power supply comprises and also comprises a control unit 6, control unit 6 input is connected between full-bridge inverting frequency sweep unit 5 and load with receiver voltage, current feedback signal, first output is connected to Full-Bridge Buck unit 4 and is converted to high-frequency pulse voltage to drive Full-Bridge Buck unit 4 to realize high-voltage dc voltage, and the second output is connected to full-bridge inverting frequency sweep unit 5 and realizes exporting specific currents peak value and the triangular wave in cycle to drive full-bridge inverting frequency sweep unit 5.Control unit 6 also comprises display and input unit 65, is connected with display and input unit 65 by PWM controller 63.
Power factor refers to the relation between effective power and total power consumption, and namely effective power is divided by the ratio of total power consumption.Substantially power factor (PF) can weigh the degree that electric power is used effectively, and when power factor (PF) value is larger, represents its electric power utilance higher.The power supply of most of load, at employing 110 to 120V, all can produce excessive power line harmonics when the single-phase alternating current of 60Hz is powered.Power line harmonics is reduced to greatest extent by increasing power factor correction.
The pfc circuit that the application adopts is made up of electronic devices and components such as inductance capacitance and UCC28019 power factor correction chips, and volume is little, remove by application-specific integrated circuit the waveform adjusting electric current, compensates the phase difference between current/voltage.
Control unit 6 comprises current/voltage and detects feedback circuit 64, PWM controller 63, drive circuit 62 and auxiliary power circuit 61, current/voltage detects feedback circuit 64 and to be connected between the output of full-bridge inverting frequency sweep unit 5 and load and to feed back to PWM controller 63, current/voltage detects feedback circuit 64 and comprises Hall current sensor and voltage detector, and described Hall element and voltage detector are connected the output of full-bridge inverting frequency sweep unit 5 and the input of PWM controller 63 respectively.Auxiliary power circuit 61 connects electric main and powers to PWM controller 63 and drive circuit 62, and described PWM controller 63 connects changed power device and full-bridge inverting frequency sweep unit 5 respectively by drive circuit 62 simultaneously.PWM controller 63 is STM2 Series of MCU.Drive circuit 62 comprises raster data model optical coupler simultaneously.Here ACPL-2J chip realizes.
Device for power switching, as IGBT, MOSFET etc. need sufficient protection, to avoid, as under-voltage, lacking saturated, the Miller effect, overload, the infringement that the conditions such as short circuit cause.The application is driven by raster data model optical coupler, the High Output Current driving force not only had, and switching speed is fast, and has the function of protection device for power switching.The defencive function of these power devices comprises under-voltage locking, the Miller effect, overload, short circuit, ensure that the safety of whole power supply and stablizes.
Full-Bridge Buck unit 4 comprises power inverter 41, step-down transformer 42 and the auxiliary rectifier filter circuit 43 that full-bridge type is become by set of power switches, power inverter 41, step-down transformer 42 are connected successively with auxiliary rectifier filter circuit 43, and the input connecting band high power correcting full bridge rectification filtering unit 2 of described power inverter 41, described auxiliary rectifier filter circuit 43 output connects full-bridge inverting frequency sweep unit 5, and the first output of control unit 6 connects power inverter 41 control end.High-voltage dc voltage is converted to high-frequency pulse voltage; High-frequency pulse voltage carries out step-down through step-down transformer 42, and the pulse voltage of high frequency is converted to stable VD through auxiliary rectifier filter circuit 43 by step-down transformer 42 secondary output voltage; Control unit 6 will control the width of the driving pulse of device for power switching according to the current/voltage sampling feedback signal exported, thus adjustment service time is to make output voltage adjustable and stable.Device for power switching is IGBT or MOSFET pipe.The full metal-oxide layer-semiconductor-field-effect transistor by name of MOSFET pipe, being called for short metal-oxide half field effect transistor is a kind of field-effect transistor that can be widely used in analog circuit and digital circuit.The full name insulated gate bipolar transistor of IGBT, the compound full-control type voltage driven type power semiconductor be made up of BJT (double pole triode) and MOS (insulating gate type field effect tube), has the advantage of the high input impedance of MOSFET and low conduction voltage drop two aspect of GTR concurrently.
Below the operation principle of this scanning power supply able to programme:
Electric main input voltage carries out electrical network filtering through Electromagnetic interference filter 1 and obtains level and smooth high voltage direct current by band high power correcting full bridge rectification filtering unit 2 again, high voltage direct current exports low-voltage DC after Full-Bridge Buck unit 4 converts high-frequency ac voltage to direct voltage and carries out step-down rectifier filtering, and low-voltage DC controls full-bridge inverting frequency sweep unit 5 through the wide modulation technique of pulse to carry out inversion and export specific currents peak value and the triangular wave in cycle.Electric power outputting current, voltage are inputed to control unit 6 through sampling as feedback quantity, control unit 6 can compare rear control Full-Bridge Buck unit 4 according to the reference waveform of setting and feedback current, voltage data and full-bridge inverting frequency sweep unit 5 exports and reference waveform is similar to the triangular wave with specific current value and cycle simultaneously.Thus realize the output of triangular voltage sweep source current.Also a closed-loop control system is formed thus.
Q1, Q2, Q3, Q4 wherein in Fig. 2 are that the device for power switching of full-bridge inverting frequency sweep unit carries out pulse-width modulation by PWM controller.In Fig. 3, Q5, Q6, Q7, Q8, Q9, Q10 are the device for power switching of Full-Bridge Buck unit, and wherein Q5, Q6, Q7, Q8 form power inverter, and T is step-down transformer, the output of Q9, Q10 device for power switching control transformer secondary voltage.
This scanning power supply main circuit adopts four-quadrant converter topological structure, and high frequency modulated ripple is under load inductance effect, and output low frequency sweep current, reaches the object of powering to magnet exciting coil.Owing to adopting negative-feedback technology, output current by strict track reference waveform, thus effectively suppresses the factors such as magnet parameter, environmental change on the impact of sweep current.Reference waveform is a waveform able to programme, can realize the optimum Match of sweep current and accelerator.
This power supply realizes source current output based on pulse width modulation technology and PWM control technology simultaneously.Electric power outputting current Hall element is sampled as feedback quantity, controlled quentity controlled variable is obtained after comparing with reference waveform set-point, after controlled quentity controlled variable input pulse width modulation controller and PWM controller 63, driving pulse is exported by PWM controller 63, after driver amplifies, remove driving power switching device, form a closed-loop control system thus.The effect of PWM controller 63 is sampled by output dc voltage, controls the width of the driving pulse of device for power switching, thus adjustment service time is to make output voltage adjustable and stable.
Specific embodiment described herein is only to the explanation for example of the utility model spirit.The utility model person of ordinary skill in the field can make various amendment or supplements or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present utility model or surmount the scope that appended claims defines.
Although more employ the terms such as Electromagnetic interference filter 1, band high power correcting full bridge rectification filtering unit 2, Full-Bridge Buck unit 4, power inverter 41, step-down transformer 42, auxiliary rectifier filter circuit 43, full-bridge inverting frequency sweep unit 5, control unit 6, auxiliary power circuit 61, drive circuit 62, PWM controller 63, current/voltage detection feedback circuit 64, display and input unit 65 herein, do not get rid of the possibility using other term.These terms are used to be only used to describe and explain essence of the present utility model more easily; The restriction that they are construed to any one additional is all contrary with the utility model spirit.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420667951.XU CN204216790U (en) | 2014-11-10 | 2014-11-10 | A Programmable Scanning Power Supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420667951.XU CN204216790U (en) | 2014-11-10 | 2014-11-10 | A Programmable Scanning Power Supply |
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| CN204216790U true CN204216790U (en) | 2015-03-18 |
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| CN201420667951.XU Expired - Fee Related CN204216790U (en) | 2014-11-10 | 2014-11-10 | A Programmable Scanning Power Supply |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105048818A (en) * | 2015-07-14 | 2015-11-11 | 东华大学 | Full-bridge phase-shift power supply with power-factor correction |
| CN106253729A (en) * | 2016-08-31 | 2016-12-21 | 王枫 | A kind of adjustable alternating impulse yoke magnetization power supply |
| CN107147325A (en) * | 2017-06-14 | 2017-09-08 | 山东阅芯电子科技有限公司 | current feed type high power pulse current source |
| CN107994642A (en) * | 2017-12-19 | 2018-05-04 | 中国电子科技集团公司第四十研究所 | A kind of seamless power supply and load transfer system and method |
| CN110228376A (en) * | 2019-06-13 | 2019-09-13 | 山东潍氢动力科技有限公司 | Hydrogen powered vehicle high-voltage charging system and its control system |
| CN112067865A (en) * | 2020-09-14 | 2020-12-11 | 南方电网科学研究院有限责任公司 | Current source device and direct current fill electric pile check gauge calibrating installation |
| CN112087125A (en) * | 2020-10-12 | 2020-12-15 | 深圳御光新材料有限公司 | Safe energy-saving power supply unit and system |
| CN113726188A (en) * | 2020-05-25 | 2021-11-30 | 中国石油化工股份有限公司 | Multi-working mode high-frequency high-voltage alternating-current power supply |
-
2014
- 2014-11-10 CN CN201420667951.XU patent/CN204216790U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105048818A (en) * | 2015-07-14 | 2015-11-11 | 东华大学 | Full-bridge phase-shift power supply with power-factor correction |
| CN106253729A (en) * | 2016-08-31 | 2016-12-21 | 王枫 | A kind of adjustable alternating impulse yoke magnetization power supply |
| CN106253729B (en) * | 2016-08-31 | 2018-09-11 | 王枫 | A kind of adjustable alternating impulse yoke magnetization power supply |
| CN107147325A (en) * | 2017-06-14 | 2017-09-08 | 山东阅芯电子科技有限公司 | current feed type high power pulse current source |
| CN107147325B (en) * | 2017-06-14 | 2020-03-17 | 山东阅芯电子科技有限公司 | Current feed type high-power pulse current source |
| CN107994642A (en) * | 2017-12-19 | 2018-05-04 | 中国电子科技集团公司第四十研究所 | A kind of seamless power supply and load transfer system and method |
| CN110228376A (en) * | 2019-06-13 | 2019-09-13 | 山东潍氢动力科技有限公司 | Hydrogen powered vehicle high-voltage charging system and its control system |
| CN113726188A (en) * | 2020-05-25 | 2021-11-30 | 中国石油化工股份有限公司 | Multi-working mode high-frequency high-voltage alternating-current power supply |
| CN112067865A (en) * | 2020-09-14 | 2020-12-11 | 南方电网科学研究院有限责任公司 | Current source device and direct current fill electric pile check gauge calibrating installation |
| CN112087125A (en) * | 2020-10-12 | 2020-12-15 | 深圳御光新材料有限公司 | Safe energy-saving power supply unit and system |
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