CN202334328U - Alternating current (AC) constant-current source - Google Patents
Alternating current (AC) constant-current source Download PDFInfo
- Publication number
- CN202334328U CN202334328U CN2011204875343U CN201120487534U CN202334328U CN 202334328 U CN202334328 U CN 202334328U CN 2011204875343 U CN2011204875343 U CN 2011204875343U CN 201120487534 U CN201120487534 U CN 201120487534U CN 202334328 U CN202334328 U CN 202334328U
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- load
- constant
- power supply
- current source
- voltage controller
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Abstract
The utility model discloses an alternating current (AC) constant-current source, which is connected with a load and comprises a transformer, an AC/direct current (DC) power converter, a DC/AC power converter, a pulse width modulation (PWM) voltage controller, an insulated gate bipolar transistor (IGBT) rectifying tube and a sampling module, wherein one side of the transformer is connected with an external 220V AC power supply, and the other side of the transformer is connected with a first path of AC/DC power converter; the external 220V AC power supply is connected with an AC input end of a second path of the AC/DC power converter; a DC output central processing unit (CPU) working power supply of the second path of AC/DC power converter is connected with a DC input end of the IGBT rectifying tube; the IGBT rectifying tube is connected with the PWM voltage controller which can control voltage output; an AC output end of the IGBT rectifying tube is connected with an AC load and a product load; the PWM voltage controller is connected with the sampling module for performing load sampling; the sampling module is connected between the AC load and the product load; and the first path of AC/DC power converter is connected with the PWM voltage controller. The AC constant-current source has small volume and a reliable structure and can set initial voltage and provide a plurality of output gears; and various products can be simultaneously operated and verified through a computer, a touch screen and the like.
Description
Technical field
The utility model relates to a kind of AC constant-current source, belongs to electric field.
Background technology
For electronic product, the quality of power source performance directly affects the electrical system functional reliability, therefore is starved of at electric field and uses highly sensitive, highly reliable AC constant-current source circuit module.
Existing AC constant-current source adopts waveform control of inverter circuit or multiple voltage regulator to realize more.The former in use can produce a large amount of harmonic waves and feed back to electrical network, disturbs the operate as normal and the circuit block complex structure of electronic product easily, breaks down easily; The reaction of latter's dynamic adjustments Current Regulation is slow, because the mechanical adjustment structure of using, wearing and tearing and noise problem can't be avoided more.
Summary of the invention
To the defective of prior art, the utility model discloses a kind of AC constant-current source, the output of may command voltage is made constant current source and is used, and can carry out multistation while output voltage and have advantages such as volume is little, power big, high stable, low noise.
To achieve these goals, the utility model is realized through following technical proposals:
A kind of AC constant-current source; Be connected with load; Comprise transformer, AC/DC power supply changeover device, DC/AC power supply changeover device, PWM voltage controller, IGBT rectifying tube, sampling module; Said transformer one side is connected with outside 220V AC power, and opposite side is connected with first via AC/DC power supply changeover device, and outside 220V AC power is connected with the AC input of the second road AC/DC power supply changeover device; The DC output CPU working power of said the second road AC/DC power supply changeover device is connected with the DC input of said IGBT rectifying tube; Said IGBT rectifying tube is connected with the PWM voltage controller that can control voltage output, and the AC output of said IGBT rectifying tube is connected with AC load and product load, and said PWM voltage controller is connected with sampling module and carries out the load sampling; Said sampling module connects between the product load, and said first via AC/DC power supply changeover device is connected with said PWM voltage controller.
Wherein, said first via AC/DC power supply changeover device is two, is used for better regulating the AC/DC conversion of control voltage.In the utility model, used AC/DC power supply changeover device preferably converts the 220V alternating current into the 300V direct current.
Wherein, said PWM voltage controller is provided with four output gears, thereby can set the gear of output as required, has improved the flexibility of using.4 gears of preferred output are the first gear 10A, the second gear 50A, third gear 100A, fourth speed position 500A.Wherein the parameter of any one gear can be revised, example.Like first gear is 10A, can make 100A into; And four gears of the starting voltage of product can be revised arbitrarily, and are irrelevant mutually.
Wherein, AC constant-current source also is connected with host computer, and said host computer is a device that has display, like computer, and touch-screen, button LED; Said host computer is connected with the CPU of PWM controller; Preferred said computer is provided with button, and said display is a touch-screen.Through the electrical installation parameter that button and touch-screen can conveniently be easy to operate the utility model, improved the convenience of using.
Further, the AC constant-current source of the utility model also is connected with blower fan, and system is cooled off.The AC constant-current source work of the utility model is 220 volts of filter rectification direct voltages of process civil power DC, and the 320V volt sends order through the host computer display and gives cpu chip; Chip controls can be read client's parameters needed, and chip operation produces waveform PWM later on, and PWM controls IGBT; The converting direct-current voltage into alternating-current voltage of IGBT, and the just profound ripple adjustable voltage of 50HZ (10～200v), advance overload sampling feedback CPU; The CPU sampling is exported a constant current voltage automatically according to the size of current of load; Load current is consistent, and according to four different no-load voltage ratios of client's product parameters automatic switchover, the voltage of chip has the voltage of transformer that 7V and 14V. are provided
The disclosed AC constant-current source of the utility model, not only small volume structure is reliable, and can set starting voltage and a plurality of output gears are provided; Can also pass through computer, touch-screen, button display, a lot of products of verification, computer can use tens even up to a hundred simultaneously, and stability is very high; The precision of experiment confirm the utility model product electric current reaches 1%, and the distortion factor is less than 3%, the system works excellent performance.
Description of drawings
Fig. 1 is the utility model AC constant-current source schematic diagram;
Fig. 2 is the utility model AC constant-current source circuit diagram.
Embodiment
With reference to figure 1, Fig. 2; AC constant-current source is disclosed; Be connected with load, comprise transformer, AC/DC power supply changeover device, DC/AC power supply changeover device, PWM voltage controller, IGBT rectifying tube, sampling module, said transformer one side is connected with outside 220V AC power; Opposite side is connected with first via AC/DC power supply changeover device; Outside 220V AC power is connected with the AC input of the second road AC/DC power supply changeover device, and the DC output CPU working power of said the second road AC/DC power supply changeover device is connected with the DC input of said IGBT rectifying tube, and said IGBT rectifying tube is connected with the PWM voltage controller that can control voltage output; The AC output of said IGBT rectifying tube is connected with AC load and product load; Said PWM voltage controller is connected with sampling module and carries out the load sampling, and between said sampling module connection and AC load and the product load, said first via AC/DC power supply changeover device is connected with said PWM voltage controller.
Wherein, said first via AC/DC power supply changeover device is two.
Wherein, said PWM voltage controller is provided with four output gears.
Wherein, AC constant-current source also is connected with host computer, and said host computer is a computer that has display, and said computer is connected with the CPU of PWM controller; Said computer is provided with button, and said display is a touch-screen.
In the utility model, sampling module can be existing any circuit that can carry out the related physical quantity sample detecting to circuit, for example can be simple sampling resistor, can also be the sample circuit system of existing commercially available complicacy.
Claims (6)
1. AC constant-current source; Be connected with load; Comprise transformer, AC/DC power supply changeover device, DC/AC power supply changeover device, PWM voltage controller, IGBT rectifying tube, sampling module; It is characterized in that said transformer one side is connected with outside 220V AC power, opposite side is connected with first via AC/DC power supply changeover device, and outside 220V AC power is connected with the AC input of the second road AC/DC power supply changeover device; The DC output CPU working power of said the second road AC/DC power supply changeover device is connected with the DC input of said IGBT rectifying tube; Said IGBT rectifying tube is connected with the PWM voltage controller that can control voltage output, and the AC output of said IGBT rectifying tube is connected with AC load and product load, and said PWM voltage controller is connected with sampling module and carries out the load sampling; Said sampling module connects between the product load, and said first via AC/DC power supply changeover device is connected with said PWM voltage controller.
2. AC constant-current source according to claim 1 is characterized in that said first via AC/DC power supply changeover device is two.
3. AC constant-current source according to claim 1 is characterized in that said PWM voltage controller is provided with four output gears.
4. AC constant-current source according to claim 1 also is connected with host computer, it is characterized in that said host computer is a device that has display, and said host computer is connected with the CPU of said PWM controller.
5. AC constant-current source according to claim 4 is characterized in that said host computer is computer, touch-screen or button LED.
6. AC constant-current source according to claim 1 is characterized in that also being connected with blower fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204875343U CN202334328U (en) | 2011-11-30 | 2011-11-30 | Alternating current (AC) constant-current source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204875343U CN202334328U (en) | 2011-11-30 | 2011-11-30 | Alternating current (AC) constant-current source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202334328U true CN202334328U (en) | 2012-07-11 |
Family
ID=46446293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204875343U Expired - Lifetime CN202334328U (en) | 2011-11-30 | 2011-11-30 | Alternating current (AC) constant-current source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202334328U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104536502A (en) * | 2014-11-05 | 2015-04-22 | 济南鲁智电子科技有限公司 | Multi-way and multi-gear digital type AC constant current source and gear regulating and gating control method thereof |
| CN104655321A (en) * | 2015-03-19 | 2015-05-27 | 国家电网公司 | Temperature measurement device for internal fuse wire of capacitor |
| CN112881763A (en) * | 2020-12-29 | 2021-06-01 | 南京长亚轨道交通科技有限公司 | Alternating current constant current load circuit |
-
2011
- 2011-11-30 CN CN2011204875343U patent/CN202334328U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104536502A (en) * | 2014-11-05 | 2015-04-22 | 济南鲁智电子科技有限公司 | Multi-way and multi-gear digital type AC constant current source and gear regulating and gating control method thereof |
| CN104655321A (en) * | 2015-03-19 | 2015-05-27 | 国家电网公司 | Temperature measurement device for internal fuse wire of capacitor |
| CN104655321B (en) * | 2015-03-19 | 2018-08-14 | 国家电网公司 | A kind of capacitor Internal fuse temperature measuring equipment |
| CN112881763A (en) * | 2020-12-29 | 2021-06-01 | 南京长亚轨道交通科技有限公司 | Alternating current constant current load circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120711 |