CN107947606A - A kind of instrument power - Google Patents
A kind of instrument power Download PDFInfo
- Publication number
- CN107947606A CN107947606A CN201711418636.8A CN201711418636A CN107947606A CN 107947606 A CN107947606 A CN 107947606A CN 201711418636 A CN201711418636 A CN 201711418636A CN 107947606 A CN107947606 A CN 107947606A
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- Prior art keywords
- instrument
- switch transformer
- instrument power
- pwm controller
- tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000003990 capacitor Substances 0.000 claims abstract description 31
- 230000002093 peripheral effect Effects 0.000 claims abstract description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 6
- 229910052710 silicon Inorganic materials 0.000 claims description 6
- 239000010703 silicon Substances 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 7
- 230000005611 electricity Effects 0.000 description 7
- 230000008878 coupling Effects 0.000 description 6
- 238000010168 coupling process Methods 0.000 description 6
- 238000005859 coupling reaction Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 206010000372 Accident at work Diseases 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
- H02M7/02—Conversion of AC power input into DC power output without possibility of reversal
- H02M7/04—Conversion of AC power input into DC power output without possibility of reversal by static converters
- H02M7/12—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/145—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
- H02M7/155—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
- H02M7/162—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only in a bridge configuration
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
- H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
- H02M1/092—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices the control signals being transmitted optically
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
- H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
- H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
- H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
- H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
- H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The present invention relates to industrial instrument field, more particularly to a kind of instrument power, including sequentially connected rectifier circuit, waveshape monitor, PWM controller, feedback circuit, switching tube, switch transformer and rectifying tube；The feedback circuit includes sequentially connected photo-coupler, current-limiting resistance, backward dioded and filter network, and the PWM controller is connected by photo-coupler with the secondary coil of the switch transformer, and the filter network is connected with the switching tube；The filter network includes electrolytic capacitor and monolithic capacitor parallel with one another, and the electrolytic capacitor is connected with the backward dioded and the switching tube respectively with the both ends after monolithic capacitor parallel connection；The output terminal of the rectifying tube and the feature board of the instrument of peripheral hardware connect, and are instrument power supply.The configuration of the present invention is simple, be easily achieved, and breaks through traditional switch power supply wide range input voltage, highly practical, applied widely.
Description
Technical field
The present invention relates to industrial instrument field, more particularly to a kind of instrument power.
Background technology
Current industrial instrument power supply is most to be powered using Switching Power Supply, can be accomplished substantially with certain anti-interference energy
Power, can allow for Width funtion to input, it is widely used in the collection of each factory and control, and still, part factory is due to power grid
It is restricted or the relevant device of production technology has power supply requirement, its power grid supply voltage needs the model in 20V-260V
Value fluctuation is enclosed, and common industrial instrument Switching Power Supply wide range input voltage is exchange point 90V-265V, is unable to reach power grid
Fluctuation range, causes industrial instrument power down that collection then occurs and fails with control；The power supply of industrial occasions generally has point again at the same time
Alternating Current Power Supply and direct current supply, general industrial instrument power supply can only meet one of which power supply mode, can not adapt to complexity
Power plant actual conditions, need to such as replace can only look for manufacturer to replace, cumbersome.A kind of therefore it provides mains ripple model
Enclose it is big, can the instrument power of compatible with alternating electricity and direct current be at the same time very necessary.
The content of the invention
The technical problems to be solved by the invention are：A kind of instrument simple in structure, mains ripple scope is big is provided
Power supply.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：
A kind of instrument power, including sequentially connected rectifier circuit, waveshape monitor, PWM controller, feedback circuit,
Switching tube, switch transformer and rectifying tube；
The feedback circuit includes sequentially connected photo-coupler, current-limiting resistance, backward dioded and filter network, described
PWM controller is connected by photo-coupler with the secondary coil of the switch transformer, the filter network and the switching tube
Connection；
The filter network includes electrolytic capacitor and monolithic capacitor parallel with one another, the electrolytic capacitor and monolithic capacitor
Both ends are connected with the backward dioded and the switching tube respectively；
The output terminal of the rectifying tube and the feature board of the instrument of peripheral hardware connect, and are instrument power supply.
The beneficial effects of the present invention are：The present invention provides a kind of instrument power, by rectifier circuit by supply voltage
DC voltage, then the square-wave voltage by waveshape monitor by voltage waveform integer into rule are all converted to, is controlled by PWM
Device and feedback circuit adjust the duty cycle of square wave, recycle switch controlled duty to adjust the cycle time opened with shut-off, into
And export electric signal to switch transformer and carry out electromagnetic conversion, the alternating voltage after the secondary coil output coupling of switch transformer
Each group output DC voltage is formed after rectifying tube rectification to use for industrial instrument.The configuration of the present invention is simple, be easily achieved, and dashes forward
Traditional Switching Power Supply wide range input voltage has been broken, it is highly practical, it is applied widely.
Brief description of the drawings
Fig. 1 is the structure diagram of the instrument power of the embodiment of the present invention；
Fig. 2 is the circuit diagram of the Part I of the instrument power of the embodiment of the present invention；
Fig. 3 is the circuit diagram of the Part II of the instrument power of the embodiment of the present invention；
Fig. 4 is the circuit diagram of the Part III of the instrument power of the embodiment of the present invention；
Label declaration：
1- power supplys；
2- rectifier circuits；
3- waveshape monitors；
4-PWM controllers；
5- feedback circuits；
6- switching tubes；
7- switch transformers；
8- rectifying tubes.
Embodiment
For the technology contents that the present invention will be described in detail, the objects and the effects, below in conjunction with embodiment and coordinate attached
Figure is explained.
The design of most critical of the present invention is：Pass through waveshape monitor, PWM controller, feedback circuit, switching tube, switch
Transformer and rectifying tube mating reaction make supply voltage scope reach 20V-265V.
It should be noted that：
The circuit diagram of Part I specifically includes power supply and rectifier circuit；
The circuit diagram of Part II specifically includes waveshape monitor；
The circuit diagram of Part III specifically includes PWM controller, switching tube, switch transformer and rectifying tube.
It refer to Fig. 1 to Fig. 4, a kind of instrument power, including sequentially connected rectifier circuit 2, waveshape monitor 3, PWM
Controller 4, feedback circuit 5, switching tube 6, switch transformer 7 and rectifying tube 8；
The feedback circuit 5 includes sequentially connected photo-coupler, current-limiting resistance, backward dioded and filter network, institute
State PWM controller 4 to be connected with the secondary coil of the switch transformer 7 by photo-coupler, the filter network is opened with described
Pipe 6 is closed to connect；
The filter network includes electrolytic capacitor and monolithic capacitor parallel with one another, the electrolytic capacitor and monolithic capacitor
Both ends are connected with the backward dioded and the switching tube 6 respectively；
The output terminal of the rectifying tube 8 and the feature board of the instrument of peripheral hardware connect, and are instrument power supply.
As can be seen from the above description, the beneficial effects of the present invention are：After power supply 1 accesses, first passing around rectifier circuit 2 will
The voltage of power supply 1 is all converted to DC voltage, if power supply 1 is direct current, rectifier circuit 2 directly will equivalent to conducting wire
The voltage of power supply 1 is delivered to waveshape monitor 3, the square-wave voltage by waveshape monitor 3 by voltage waveform integer into rule, by
PWM controller 4 is according to the duty cycle of the loading condition constantly regulate square wave of industrial instrument, and switching tube 6 is according to the duty after adjusting
The cycle time being turned on and off is changed than carrying out duty cycle adjustment power supply 1, the electric signal after adjusting is delivered to switch transformer 7
Electromagnetic conversion is carried out, finally by forming each group output after rectified 8 rectification of pipe of alternating voltage after 7 output coupling of switch transformer
DC voltage is used for industrial instrument.
One group in output voltage is connected as feedback voltage with feedback circuit 5, and feedback circuit 5 is according to output voltage size
It is controlled, when feedback voltage is relatively low, the signal optocoupler in feedback circuit 5 is then connected, and PWM controller 4 receives optocoupler and leads
Messenger, starting adjusting duty cycle improves " 1 " proportion in the output cycle, and then increases output power；Conversely, when anti-
When feedback output voltage is higher, the optocoupler in feedback circuit 5 then disconnects, and PWM controller 4 reduces " 1 " in the output cycle, output work
Rate reduces；If fed-back output voltage is abnormal, in feedback circuit 5 control PWM controller 4 can not starting of oscillation, output close.Waveform
Controller 3 can be the signal integer of the power supply 1 of various waveforms into rule square wave, the power supply of factory is because of its particularity, power supply
Inside often be mixed with various clutters, such as sawtooth waveforms chord ripple, if not integer into rule square wave, can cause instrument power without
Method works, and industrial accident then occurs.
Feedback circuit 5 is isolated using photo-coupler, and electricity is adjusted to PWM controller 4 except that can carry out feedback signal back
The output power in source 1, and can be as fault diagnosis, when feedback power supply disappears, optical coupling isolation circuit can play suspension electricity
The work that source 1 is changed, additionally, due to the Phototube Coupling characteristic of optocoupler, makes between backfeed loop and control loop without directly
Electrical connection, belongs to and is of coupled connections, will not cause electrical damage.The filtering net being in parallel using electrolytic capacitor and monolithic capacitor
Network, may filter that high frequency and low frequency.
Further, the waveshape monitor 3 includes sequentially connected filter capacitor, waveform control chip and I-shaped electricity
Sense, the filter capacitor are connected with the rectifier circuit 2, and the I-shaped inductance is connected with the PWM controller 4.
Seen from the above description, the effect of filter capacitor is that the voltage for making to export after filtering is steady dc voltage, ripple
The effect of shape control chip is adjustment control waveform and ensures its stabilization.
Further, the switching tube 6 is connected with the primary of the switch transformer 7, the secondary of the switch transformer 7
It is connected with the rectifying tube 8.
As can be seen from the above description, switching tube 6 according to the duty cycle after adjusting carry out duty cycle adjustment power supply 1 change open or
The cycle time of shut-off, the electric signal after adjusting is delivered to switch transformer 7 and carries out electromagnetic conversion, finally by switch transformer 7
Each group output DC voltage is formed after rectified 8 rectification of pipe of alternating voltage after output coupling.
Further, the rectifier circuit 2 includes sequentially connected temperature-sensitive multiple tube, catching diode and rectification silicon
Heap, the rectification silicon stack are connected with the waveshape monitor 3.
As can be seen from the above description, the electric signal that so can effectively suppress beyond permission voltage range, which accesses, causes power supply 1
It is burned.
Further, the rectifying tube 8 is Schottky Rectifier.
As can be seen from the above description, Schottky Rectifier has the advantages that switching frequency is high low with forward voltage drop etc., and does not deposit
In minority carrier lifetime and reverse-recovery problems, so switching speed is very fast, switching loss is also especially small, is particularly suitable for
Frequency applications.
Further, constant-voltage controller is equipped between the switch transformer 7 and the PWM controller 4.
As can be seen from the above description, constant-voltage controller is increasing the stability of integrated circuit.
Fig. 1 to Fig. 4 is refer to, the embodiment of the present invention one is：
A kind of instrument power, including sequentially connected rectifier circuit 2, waveshape monitor 3, PWM controller 4, feedback electricity
Road 5, switching tube 6, switch transformer 7 and rectifying tube 8；
The feedback circuit 5 includes sequentially connected photo-coupler, current-limiting resistance, backward dioded and filter network, institute
State PWM controller 4 to be connected with the secondary coil of the switch transformer 7 by photo-coupler, the filter network is opened with described
Pipe 6 is closed to connect；
The filter network includes electrolytic capacitor and monolithic capacitor parallel with one another, the electrolytic capacitor and monolithic capacitor
Both ends are connected with the backward dioded and the switching tube 6 respectively；
The output terminal of the rectifying tube 8 and the feature board of the instrument of peripheral hardware connect, and are instrument power supply.
Fig. 1 to Fig. 4 is refer to, the embodiment of the present invention two is：
A kind of instrument power, including sequentially connected rectifier circuit 2, waveshape monitor 3, PWM controller 4, feedback electricity
Road 5, switching tube 6, switch transformer 7 and rectifying tube 8；
The feedback circuit 5 includes sequentially connected photo-coupler, current-limiting resistance, backward dioded and filter network, institute
State PWM controller 4 to be connected with the secondary coil of the switch transformer 7 by photo-coupler, the filter network is opened with described
Pipe 6 is closed to connect；
The filter network includes electrolytic capacitor and monolithic capacitor parallel with one another, the electrolytic capacitor and monolithic capacitor
Both ends are connected with the backward dioded and the switching tube 6 respectively；
The output terminal of the rectifying tube 8 and the feature board of the instrument of peripheral hardware connect, and are instrument power supply.
The waveshape monitor 3 includes sequentially connected filter capacitor, waveform control chip and I-shaped inductance, the filtering
Capacitance is connected with the rectifier circuit 2, and the I-shaped inductance is connected with the PWM controller 4.The switching tube 6 with it is described
The primary connection of switch transformer 7, the secondary of the switch transformer 7 are connected with the rectifying tube 8.The rectifier circuit 2
Including sequentially connected temperature-sensitive multiple tube, catching diode and rectification silicon stack, the rectification silicon stack connects with the waveshape monitor 3
Connect.The rectifying tube 8 is Schottky Rectifier 8.Isobarically Control is equipped between the switch transformer 7 and the PWM controller 4
Device.
Refer to Fig. 1 to Fig. 4, the embodiment of the present invention three and embodiment one difference lies in：The secondary of switch transformer 7
Coil is directly connected with feedback circuit 5, and the power source of photo-coupler is switch transformer 7, is responded in this way the most
Rapidly.
Refer to Fig. 1 to Fig. 4, the embodiment of the present invention four and embodiment one difference lies in：The secondary of switch transformer 7
After coil output voltage is output to voltage-stabiliser tube after 8 rectification of rectifying tube, then it is connected with the feedback circuit 5, using this side
Formula response speed and degree of regulation are good.
Refer to Fig. 1 to Fig. 4, the embodiment of the present invention five and embodiment one difference lies in：The secondary of switch transformer 7
The input voltage that the input terminal that coil output voltage takes constant-voltage controller to control after divider resistance partial pressure allows supplies constant pressure control
Device processed, the power source of photo-coupler is constant-voltage controller, is responded in this way relatively slowly, but the input electricity of PWM controller 4
Press degree of regulation high.
In conclusion a kind of instrument power provided by the invention, is all converted to supply voltage by rectifier circuit
DC voltage, then the square-wave voltage by waveshape monitor by voltage waveform integer into rule, square wave is adjusted by PWM controller
Duty cycle, recycle switch controlled duty to adjust the cycle time opened with shut-off, and then export electric signal and become to switching
Depressor carries out electromagnetic conversion, and the alternating voltage after the secondary coil output coupling of switch transformer is formed after rectifying tube rectification
Each group exports DC voltage and is used for industrial instrument.The configuration of the present invention is simple, be easily achieved, and it is wide to breach traditional Switching Power Supply
Input voltage range, it is highly practical, it is applied widely.
The foregoing is merely the embodiment of the present invention, is not intended to limit the scope of the invention, every to utilize this hair
The equivalents that bright specification and accompanying drawing content are made, are directly or indirectly used in relevant technical field, similarly include
In the scope of patent protection of the present invention.
Claims (6)
- A kind of 1. instrument power, it is characterised in that including sequentially connected rectifier circuit, waveshape monitor, PWM controller, Feedback circuit, switching tube, switch transformer and rectifying tube；The feedback circuit includes sequentially connected photo-coupler, current-limiting resistance, backward dioded and filter network, the PWM Controller is connected by photo-coupler with the secondary coil of the switch transformer, and the filter network connects with the switching tube Connect；The filter network includes electrolytic capacitor and monolithic capacitor parallel with one another, after the electrolytic capacitor is in parallel with monolithic capacitor Both ends be connected respectively with the backward dioded and the switching tube；The output terminal of the rectifying tube and the feature board of the instrument of peripheral hardware connect, and are instrument power supply.
- 2. instrument power according to claim 1, it is characterised in that the waveshape monitor includes sequentially connected filtering Capacitance, waveform control chip and I-shaped inductance, the filter capacitor are connected with the rectifier circuit, the I-shaped inductance and institute State PWM controller connection.
- 3. instrument power according to claim 1, it is characterised in that the primary of the switching tube and the switch transformer Connection, the secondary of the switch transformer are connected with the rectifying tube.
- 4. instrument power according to claim 1, it is characterised in that the rectifier circuit includes sequentially connected temperature-sensitive Multiple tube, catching diode and rectification silicon stack, the rectification silicon stack are connected with the waveshape monitor.
- 5. instrument power according to claim 1, it is characterised in that the rectifying tube is Schottky Rectifier.
- 6. instrument power according to claim 1, it is characterised in that the switch transformer and the PWM controller it Between be equipped with constant-voltage controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711418636.8A CN107947606A (en) | 2017-12-25 | 2017-12-25 | A kind of instrument power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711418636.8A CN107947606A (en) | 2017-12-25 | 2017-12-25 | A kind of instrument power |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107947606A true CN107947606A (en) | 2018-04-20 |
Family
ID=61939992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711418636.8A Pending CN107947606A (en) | 2017-12-25 | 2017-12-25 | A kind of instrument power |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5973942A (en) * | 1998-07-10 | 1999-10-26 | Rosemount Inc. | Start up circuit for DC powered field instrument |
| US5973941A (en) * | 1997-07-17 | 1999-10-26 | Schlumberger Industries, S.A. | Electricity meter with a switching mode transformer power supply circuit |
| CN102305640A (en) * | 2011-08-05 | 2012-01-04 | 中国石化集团第十建设公司 | Instrument power supply for live debugging |
| CN104022661A (en) * | 2014-06-11 | 2014-09-03 | 合肥工业大学 | Switching power supply for AC/DC-DC self-adaptive instrument within ultra-wide voltage input range |
| CN105915084A (en) * | 2016-05-13 | 2016-08-31 | 威胜集团有限公司 | Power supply device used for metering device |
| CN207588725U (en) * | 2017-12-25 | 2018-07-06 | 福建顺昌虹润精密仪器有限公司 | A kind of instrument power |
-
2017
- 2017-12-25 CN CN201711418636.8A patent/CN107947606A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5973941A (en) * | 1997-07-17 | 1999-10-26 | Schlumberger Industries, S.A. | Electricity meter with a switching mode transformer power supply circuit |
| US5973942A (en) * | 1998-07-10 | 1999-10-26 | Rosemount Inc. | Start up circuit for DC powered field instrument |
| CN102305640A (en) * | 2011-08-05 | 2012-01-04 | 中国石化集团第十建设公司 | Instrument power supply for live debugging |
| CN104022661A (en) * | 2014-06-11 | 2014-09-03 | 合肥工业大学 | Switching power supply for AC/DC-DC self-adaptive instrument within ultra-wide voltage input range |
| CN105915084A (en) * | 2016-05-13 | 2016-08-31 | 威胜集团有限公司 | Power supply device used for metering device |
| CN207588725U (en) * | 2017-12-25 | 2018-07-06 | 福建顺昌虹润精密仪器有限公司 | A kind of instrument power |
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Application publication date: 20180420 |