CN204761311U - Intelligent instrument is with many output switch power - Google Patents
Intelligent instrument is with many output switch power Download PDFInfo
- Publication number
- CN204761311U CN204761311U CN201520455305.1U CN201520455305U CN204761311U CN 204761311 U CN204761311 U CN 204761311U CN 201520455305 U CN201520455305 U CN 201520455305U CN 204761311 U CN204761311 U CN 204761311U
- Authority
- CN
- China
- Prior art keywords
- output
- high frequency
- rectification
- switch element
- unit
- 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.)
- Expired - Fee Related
Links
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The utility model discloses an intelligent instrument is with many output switch power, including electric current amplitude limiting unit, the rectifying and wave -filtering unit, high frequency transform switch element, high frequency isolation transformer, auxiliary circuit, PWM control circuit and output Rectifier filtering unit, apply signal voltage exports the rectifying and wave -filtering unit after electric current amplitude limiting unit is to the impulse current amplitude limiting, the rectification is level and smooth direct current, be high -frequency ac by the direct current contravariant of high frequency transform switch element after with the rectification again, it is elementary to give high frequency isolation transformer, the secondary voltage of responding to obtains reliable and stable DC power supply through output Rectifier filtering unit, the two sets of square -wave voltages that were coupled to on transformer time limit obtain after the rectifying and wave -filtering respectively 12V (0.7A) and - 12V (0.7A) DC voltage output, ACDC195-265V input has been realized, DC12V -12V5V output, can generally be applied to in all kinds of electric power instrument.
Description
Technical field
The utility model relates to information electronic technical field, particularly a kind of intelligent instrument multiple output switch electric power.
Background technology
The instrument electric quantity signal sampling circuit board majority of current producer design adopts price voltage transformer costly and signal processing chip, considerably increases the cost of manufacture of electric quantity signal sampling circuit board.
Utility model content
For above-mentioned the deficiencies in the prior art, the purpose of this utility model is to provide a kind of intelligent instrument multiple output switch electric power, achieves AC/DC195 ~ 265V input, exportable DC12V/-12V/5V tri-groups of reliable source of power.
In order to solve the problems of the technologies described above, the utility model is achieved through the following technical solutions:
A kind of intelligent instrument multiple output switch electric power, comprises current limit unit, rectification filtering unit, high frequency conversion switch element, high-frequency isolation transformer, auxiliary circuit, pwm control circuit and output rectification filter unit, input voltage signal outputs to rectification filtering unit after current limit unit is to impact current limit, direct rectification is more level and smooth direct current, the clutter that the clutter filtering existence by input filter hinders the machine to produce simultaneously feeds back to electrical network, be high-frequency alternating current by high frequency conversion switch element by the DC inverter after rectification again, give high-frequency isolation transformer elementary, the voltage that secondary induction goes out obtains reliable and stable DC power supply through output rectification filter unit, the two prescription wave voltages that transformer time limit is coupled to obtain 12V(0.7A respectively after rectifying and wave-filtering) and-12V(0.7A) direct voltage output, wherein 12V(0.7A) direct voltage output through 7805 chips, obtain 5V direct voltage output, pwm control circuit is from 12V(0.7A) DC voltage output end sampling, compare with the fiducial value of rectification filtering unit, the duty ratio of high frequency conversion switch element is controlled according to comparative result, adjustment output voltage, described pwm control circuit is realized exporting voltage stabilizing and FEEDBACK CONTROL by photoelectrical coupler LTV817A simultaneously, reach the effective isolation exported with input, auxiliary circuit part is provided with between high frequency conversion switch element and high-frequency isolation transformer, winding is assisted to be powered to high frequency conversion switch element TNY277 by halfwave rectifier by high-frequency isolation transformer, make chip operation.
Preferably, described rectification filtering unit comprises rectification unit, is made up of four diodes, and filter unit forms π type filter circuit, i.e. input filter by two electric capacity and an inductance; Filter unit connects described high frequency conversion switch element and pwm control circuit.
Preferably, described high frequency conversion switch element have employed the high efficiency off-line switch I CTNY277 having more flexibility and more high-power orientation.
Preferably, described auxiliary circuit is that transformer secondary coil is formed through bias diode, partially installing capacitor, biasing resistor.
Compared with prior art, tool has the following advantages the utility model:
This instrument electric quantity signal sampling circuit board that the utility model provides, can carry out acquisition process to input three-phase alternating voltage, current signal simultaneously.The three-phase alternating voltage signal of input collects-2.5 ~ 2.5V alternating voltage through resistor voltage divider circuit; follow-up voltage follower plays the effect of buffering, isolation, raising load capacity; through add circuit; be converted to 0 ~ 5V alternating voltage, the clamping diode circuit of circuit end is for realizing the overvoltage protection to single-chip microcomputer.Input three-phase alternating current signal is converted to small voltage signal through current transformer and sample resistance, through follow-up amplification, addition, follows, is transformed to 0 ~ 5V alternating voltage, can by single-chip microcomputer identifying processing.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is principle schematic of the present utility model.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not paying the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Below in conjunction with accompanying drawing 1 and specific embodiment, the utility model is described further.
This intelligent instrument multiple output switch electric power described in the utility model, is mainly used in electric instrument.In these instrument, different operating chip is different to the requirement of working power, general operating voltage requirement about the 5V of single-chip microcomputer, consider that cost adopts non-rail-to-rail amplification chip, its operating voltage range is wider, but requires according to output and consider common voltage, generally adopts positive and negative 12V.
Be illustrated in figure 1 the KEM2000 intelligent instrument multiple output switch electric power annexation schematic diagram that the utility model provides, be made up of current limit unit, rectification filtering unit, high frequency conversion switch element, high-frequency isolation transformer, auxiliary circuit, pwm control circuit and output rectification filter unit seven parts.Introduce this seven each major functions of part below in detail:
Current limit unit
Current limit unit is made up of a 1A fuse, realizes the current limit effect to input signal.
Rectification filtering unit
AC/DC195 ~ 265V input voltage delivers to rectification filtering unit after impulse current amplitude limit, obtains a more stable direct voltage.
High frequency conversion switch element
Have employed the high efficiency off-line switch I CTNY277 having more flexibility and more high-power orientation, the pulsating dc voltage obtained by rectification filtering unit, through this high frequency conversion switch element, make transformer primary side obtain the square wave of a 132KHz.
High-frequency isolation transformer
Adopt EI22 core transformers.
Auxiliary circuit
The auxiliary winding of transformer is powered to TNY277 by halfwave rectifier, makes chip operation.
Pwm control circuit
Sampled from output by photoelectrical coupler LTV817A, compare with fiducial value, the duty ratio of high frequency power switch element is controlled according to comparative result, thus reach the object of adjustment output voltage, photoelectrical coupler LTV817A realizes exporting voltage stabilizing and FEEDBACK CONTROL simultaneously, reaches the effective isolation exported with input.
Output rectification filter unit
By the alternating component filtering in pulsating direct current, reduce alternating component.The two prescription wave voltages that transformer time limit is coupled to obtain 12V(0.7A respectively after rectifying and wave-filtering) and-12V(0.7A) direct voltage output.Wherein 12V(0.7A) direct voltage output through 7805 chips, obtain 5V direct voltage output.
Applicant has all test instruments required for test: adjustable power of alterating and direct current, high-accuracy voltage test instrumentation, temp regulatable electric iron etc.Reliable guarantee is provided to the experimental study of the project implementation.
By simulated experiment, obtain related data, and then research makes intelligent instrument multiple output switch electric power.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection range of the present utility model.
Claims (4)
1. an intelligent instrument multiple output switch electric power, is characterized in that, comprises current limit unit, rectification filtering unit, high frequency conversion switch element, high-frequency isolation transformer, auxiliary circuit, pwm control circuit and output rectification filter unit, input voltage signal outputs to rectification filtering unit after current limit unit is to impact current limit, direct rectification is more level and smooth direct current, the clutter that the clutter filtering existence by input filter hinders the machine to produce simultaneously feeds back to electrical network, be high-frequency alternating current by high frequency conversion switch element by the DC inverter after rectification again, give high-frequency isolation transformer elementary, the voltage that high-frequency isolation transformer secondary induction goes out obtains reliable and stable DC power supply through output rectification filter unit, the two prescription wave voltages that transformer secondary output is coupled to obtain 12V respectively after rectifying and wave-filtering, 0.7A and-12V, 0.7A direct voltage output, wherein 12V, the direct voltage output of 0.7A is through 7805 chips, obtain 5V direct voltage output, pwm control circuit is from 12V, the DC voltage output end sampling of 0.7A, compare with the fiducial value of rectification filtering unit, the duty ratio of high frequency conversion switch element is controlled according to comparative result, adjustment output voltage, described pwm control circuit is realized exporting voltage stabilizing and FEEDBACK CONTROL by photoelectrical coupler LTV817A simultaneously, reach the effective isolation exported with input, auxiliary circuit part is provided with between high frequency conversion switch element and high-frequency isolation transformer, winding is assisted to be powered to high frequency conversion switch element TNY277 by halfwave rectifier by high-frequency isolation transformer, make chip operation.
2. a kind of intelligent instrument multiple output switch electric power according to claim 1, it is characterized in that, described rectification filtering unit comprises rectification unit, is made up of four diodes, filter unit forms π type filter circuit, i.e. input filter by two electric capacity and an inductance; Filter unit connects described high frequency conversion switch element and pwm control circuit.
3. a kind of intelligent instrument multiple output switch electric power according to claim 1, is characterized in that, described high frequency conversion switch element adopts high efficiency off-line switch I CTNY277.
4. a kind of intelligent instrument multiple output switch electric power according to claim 1, is characterized in that, described auxiliary circuit is that transformer secondary coil is formed through bias diode, partially installing capacitor and biasing resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520455305.1U CN204761311U (en) | 2015-06-29 | 2015-06-29 | Intelligent instrument is with many output switch power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520455305.1U CN204761311U (en) | 2015-06-29 | 2015-06-29 | Intelligent instrument is with many output switch power |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204761311U true CN204761311U (en) | 2015-11-11 |
Family
ID=54475979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520455305.1U Expired - Fee Related CN204761311U (en) | 2015-06-29 | 2015-06-29 | Intelligent instrument is with many output switch power |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204761311U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106200711A (en) * | 2016-09-07 | 2016-12-07 | 合肥三冠包装科技有限公司 | A kind of heating temperature control circuit matching servo packing machine circuit |
| CN111239467A (en) * | 2020-03-13 | 2020-06-05 | 成都世翌信科技有限责任公司 | High-isolation voltage-resistant alternating-current voltage sensor |
-
2015
- 2015-06-29 CN CN201520455305.1U patent/CN204761311U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106200711A (en) * | 2016-09-07 | 2016-12-07 | 合肥三冠包装科技有限公司 | A kind of heating temperature control circuit matching servo packing machine circuit |
| CN111239467A (en) * | 2020-03-13 | 2020-06-05 | 成都世翌信科技有限责任公司 | High-isolation voltage-resistant alternating-current voltage sensor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106533152B (en) | A kind of device and method improving Boost three-level converter PF | |
| CN107127422B (en) | Arc welder power supply of high power factor technique | |
| CN204761311U (en) | Intelligent instrument is with many output switch power | |
| CN206922659U (en) | Power transfer module | |
| US9455624B2 (en) | Power supply with power factor correction circuit | |
| CN103916015A (en) | Control device for dual-mode power supply switching | |
| CN107124105B (en) | Improve the control system and method for isolated form three-level PFC converter PF | |
| CN205017224U (en) | Power circuit of PFC flyback LED power supply for converting alternating current into direct current | |
| CN111141949A (en) | Alternating voltage sampling circuit for output power control and design method thereof | |
| CN204504465U (en) | Parallel type inversion electric power main circuit | |
| CN103722319B (en) | The circuit control board system of electric welding machine and electric welding machine thereof | |
| CN202780179U (en) | Overcurrent protection circuit of main circuit of inverter welding machine | |
| CN103560662A (en) | PFC control method and control device | |
| CN102332834A (en) | High-efficiency low-harmonic AC/DC (alternating current or direct current) converter | |
| CN209105035U (en) | A kind of DC-DC decompression isolation circuit | |
| CN203747645U (en) | Power adapter circuit for voice products | |
| CN206892704U (en) | A kind of AC constant-current source | |
| CN206811289U (en) | Current foldback circuit and IGBT inverter type welders applied to IGBT inverter type welders | |
| CN106329939B (en) | A kind of switching power converters | |
| CN203691228U (en) | Magnetic coupling type single-phase high-gain bridge-less power factor correction circuit | |
| CN203894694U (en) | Low-power power circuit of computer | |
| US20230151954A1 (en) | Power Adapter of LED Light String Having Valley-fill Circuit | |
| CN205610472U (en) | Intelligence switch power control circuit | |
| CN202602538U (en) | Switching power source and electric locomotive | |
| CN202759392U (en) | AC-DC switching power converter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20151211 Address after: 650221, five Village Road, 2 North Village, Kunming City, Yunnan Province Patentee after: Kunming Xingsanfang Electric Apparatus Science and Technology Co., Ltd. Patentee after: Kunming Dianyan Energy-saving Technology Development Co., Ltd. Address before: 650221, five Village Road, 2 North Village, Kunming City, Yunnan Province Patentee before: Kunming Xingsanfang Electric Apparatus Science and Technology Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151111 Termination date: 20180629 |