CN202374183U - Electronic alternating-current instantaneous constant-current source - Google Patents
Electronic alternating-current instantaneous constant-current source Download PDFInfo
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- CN202374183U CN202374183U CN2011205516761U CN201120551676U CN202374183U CN 202374183 U CN202374183 U CN 202374183U CN 2011205516761 U CN2011205516761 U CN 2011205516761U CN 201120551676 U CN201120551676 U CN 201120551676U CN 202374183 U CN202374183 U CN 202374183U
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Abstract
The utility model relates to a power supply device, in particular to an electronic alternating-current instantaneous constant-current source. The electronic alternating-current instantaneous constant-current source comprises a control and display unit, a simulated closed-loop control unit, an inverting unit, an upflow output unit and an alarm and protection unit, wherein the input end of the control and display unit is connected with the upflow output unit and outputs a control signal to the simulated closed-loop control unit; the input end of the simulated closed-loop control unit is connected with the control and display unit, the inverting unit and the upflow output unit, and outputs an IGBT (Insulated Gate Bipolar Translator) control signal to the inverting unit; the input end of the inverting unit is connected with the simulated closed-loop control unit, and is also connected with a three-phase alternating-current power, and the output end of the inverting unit outputs a single-phase alternating-current power; and the input end of the alarm and protection unit is connected with the control and display unit and the simulated closed-loop control unit, and the output end of the alarm and protection unit is connected with the control and display unit. The electronic alternating-current instantaneous constant-current source has the advantages that the waveform of the output current is good, the total harmonic distortion is less than 2%; and the response time of the output current is fast, and the target value can be realized within 5ms.
Description
Technical field
The utility model relates to a kind of supply unit, and a kind of specifically electronic type exchanges instantaneous constant-current source.
Background technology
At present, carry out the dispatching from the factory of product of testing current at needs and detect, the quick response of current source is very thorny difficult problem in the industry always.Main cause has: one, for the output equipment of low-voltage, high-current, rising current transformer is the link of a large time constant in the equipment; Two, the randomness of load has been introduced in the existence of test product individual difference.More than two reasons cause constant-current source the loud time generally all greater than 500ms, for the detection that powers up the time less than 500ms, current precision is difficult to control.So just caused the assay error bigger.
In theoretical field, classical control theory and modern control theory development are quite ripe.Aspect engineering, the fast-ripenin of SPWM technology becomes the quick adjustment of voltage and is more prone to.Output current control based on the double-current ring has possessed theoretical foundation and the engineering foundation realized.High accuracy, the instantaneous constant-current source of fast-response realizes becoming possibility.
The utility model content
The electric current that exists to the existing power supply device can't respond the weak point that reaches set point and influenced by load variations fast, and the technical problem that the utility model will solve provides the electronic type that a kind of response speed, current precision, wave distortion of output current all reach good effect and not influenced by the electrical network wave distortion and exchanges instantaneous constant-current source.
The utility model for realizing the technical scheme that above-mentioned purpose adopted is: a kind of electronic type exchanges instantaneous constant-current source, comprises
Control and display unit, input is connected with the up-flow output unit, and the output voltage signal and the output current signal of the output of input up-flow output unit output a control signal to the analog closed-loop control unit;
The analog closed-loop control unit, input connects control and display unit, inversion unit and up-flow output unit, and output IGBT control signal is to inversion unit;
Inversion unit, input is connected with the analog closed-loop control unit, also is connected to three-phase alternating current, and output connects the up-flow output unit, also exports internal current and feeds back signal to the analog closed-loop control unit;
The up-flow output unit, input connects inversion unit, and the inversion that receives inversion unit output exchanges output, and the output single-phase alternating current is also exported output voltage signal and output current signal to control and display unit.
Also comprise and reporting to the police and protected location; Input is connected with the analog closed-loop control unit with reception control and display unit; Receive the alarm condition reset signal of control and display unit output and the fine ripple signal of end of analog closed-loop control unit output, output is connected with inversion unit with control and display unit, is connected with inversion unit with control and display unit; Alarm signal is input in control and the display unit, enable signal is input in the inversion unit.
Said analog closed-loop control unit comprises a PID adjuster connected in series, the 2nd PID adjuster and PWM frequency-doubled signal generative circuit; The input of a said PID adjuster receives control and the control signal of display unit output and the output current signal of up-flow output unit, and first signal of PID adjuster output inputs to the input of the 2nd PID adjuster; The input of said the 2nd PID adjuster also is connected to the internal current feedback signal of inverter output, and the fine ripple signal of the 2nd PID regulator output inserts the input of warning and protected location and PWM frequency-doubled signal generative circuit respectively; Said PWM frequency-doubled signal generative circuit output IGBT control signal is delivered to inversion unit.
Said inversion unit comprises the inverter output circuit of a H bridge, and the output current of being gathered the H bridge by transducer SQ1 obtains the internal current feedback signal.
Said up-flow unit comprises a rising current transformer, a current sensor and a voltage sensor; Current sensor is gathered the current signal of rising current transformer output as output current signal, and voltage sensor is gathered the voltage signal of rising current transformer output as output voltage signal.
The utlity model has following advantage:
1. output current wave is good, and total harmonic distortion is less than 2%;
The output current response time fast, in 5ms, just can reach desired value;
3. circuit realizes that simply cost is lower;
4. principle is simple, and device is selected comparatively flexible, and commercialization is convenient.
Description of drawings
Fig. 1 is the utility model electrical schematic diagram;
Fig. 2 is an analog closed-loop control unit electrical schematic diagram in the utility model;
Fig. 3 is an inversion unit electrical schematic diagram in the utility model;
Fig. 4 is a up-flow unit electrical schematic diagram in the utility model.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is done further detailed description.
As shown in Figure 1, a kind of electronic type of the utility model exchanges instantaneous constant-current source and comprises: control and display unit, analog closed-loop control unit, inversion unit, warning and protected location and up-flow output unit.Wherein the input of inversion unit is connected to three-phase alternating current, and output is a single-phase alternating current, through the output of up-flow output unit.The input of control and display unit links to each other with output current signal with the output alarm signal of protected location and the output output voltage signal of up-flow output unit with warning respectively; Warning resets with the output alarm condition of control and display unit with the input of protected location and links to each other, and also links to each other with the fine ripple signal of the output of analog closed-loop control unit; The input of analog closed-loop control unit links to each other with the output control signal of control and display unit respectively; Also link to each other with the internal current feedback signal of inversion unit; Also resetting with the input alarm condition of protected location with warning links to each other, and also the current feedback signal with the up-flow output unit links to each other; The input of inversion unit links to each other with the output enable signal of protected location with warning respectively, also links to each other with the IGBT control signal of analog closed-loop control unit, and also the three-phase alternating current with the outside input links to each other; The input of up-flow output unit exchanges output and links to each other with the inversion of inversion unit.
As shown in Figure 2, said analog closed-loop control unit comprises a PID adjuster connected in series, the 2nd PID adjuster and PWM frequency-doubled signal generative circuit.Wherein the input of a PID adjuster receives control and the control signal of display unit output and the output current signal of up-flow unit; The input of first signal to the, the two PID adjusters of the one PID adjuster output; The input of the 2nd PID adjuster also is connected to the internal current feedback signal; The fine ripple signal of the 2nd PID regulator output inserts the input of PWM frequency-doubled signal generative circuit, and PWM frequency-doubled signal generative circuit output IGBT control signal is delivered to inversion unit.
As shown in Figure 3, said inversion unit comprises the inverter output circuit of a H bridge.The output current of the H bridge of being gathered by transducer SQ1 obtains the internal current feedback signal.
As shown in Figure 4, said up-flow unit comprises a rising current transformer, a current sensor and a voltage sensor.The current signal of gathering rising current transformer output by transducer SQ2 is as output current signal.The voltage signal of gathering rising current transformer output by transducer SQ3 is as output voltage signal.
Claims (5)
1. an electronic type exchanges instantaneous constant-current source, it is characterized in that, comprises
Control and display unit, input is connected with the up-flow output unit, and the output voltage signal and the output current signal of the output of input up-flow output unit output a control signal to the analog closed-loop control unit;
The analog closed-loop control unit, input connects control and display unit, inversion unit and up-flow output unit, and output IGBT control signal is to inversion unit;
Inversion unit, input is connected with the analog closed-loop control unit, also is connected to three-phase alternating current, and output connects the up-flow output unit, also exports internal current and feeds back signal to the analog closed-loop control unit;
The up-flow output unit, input connects inversion unit, and the inversion that receives inversion unit output exchanges output, and the output single-phase alternating current is also exported output voltage signal and output current signal to control and display unit.
2. electronic type according to claim 1 exchanges instantaneous constant-current source; It is characterized in that; Comprise also and reporting to the police and protected location that input is connected with the analog closed-loop control unit with reception control and display unit, receive the alarm condition reset signal of control and display unit output and the fine ripple signal of end of analog closed-loop control unit output; Output is connected with inversion unit with control and display unit; Be connected with inversion unit with control and display unit, alarm signal is input in control and the display unit, enable signal is input in the inversion unit.
3. electronic type according to claim 1 exchanges instantaneous constant-current source, it is characterized in that, said analog closed-loop control unit comprises a PID adjuster connected in series, the 2nd PID adjuster and PWM frequency-doubled signal generative circuit; The input of a said PID adjuster receives control and the control signal of display unit output and the output current signal of up-flow output unit, and first signal of PID adjuster output inputs to the input of the 2nd PID adjuster; The input of said the 2nd PID adjuster also is connected to the internal current feedback signal of inverter output, and the fine ripple signal of the 2nd PID regulator output inserts the input of warning and protected location and PWM frequency-doubled signal generative circuit respectively; Said PWM frequency-doubled signal generative circuit output IGBT control signal is delivered to inversion unit.
4. electronic type according to claim 1 exchanges instantaneous constant-current source, it is characterized in that, said inversion unit comprises the inverter output circuit of a H bridge, and the output current of being gathered the H bridge by transducer SQ1 obtains the internal current feedback signal.
5. electronic type according to claim 1 exchanges instantaneous constant-current source; It is characterized in that; Said up-flow unit comprises a rising current transformer, a current sensor and a voltage sensor; Current sensor is gathered the current signal of rising current transformer output as output current signal, and voltage sensor is gathered the voltage signal of rising current transformer output as output voltage signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205516761U CN202374183U (en) | 2011-12-26 | 2011-12-26 | Electronic alternating-current instantaneous constant-current source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205516761U CN202374183U (en) | 2011-12-26 | 2011-12-26 | Electronic alternating-current instantaneous constant-current source |
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| Publication Number | Publication Date |
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| CN202374183U true CN202374183U (en) | 2012-08-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011205516761U Expired - Lifetime CN202374183U (en) | 2011-12-26 | 2011-12-26 | Electronic alternating-current instantaneous constant-current source |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105827134A (en) * | 2015-12-25 | 2016-08-03 | 温州大学 | Multi-magnetic-circuit, low-voltage and large-current digital AC constant current source |
| CN106033224A (en) * | 2015-03-16 | 2016-10-19 | 沈阳新松机器人自动化股份有限公司 | Large-current AC current source |
-
2011
- 2011-12-26 CN CN2011205516761U patent/CN202374183U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106033224A (en) * | 2015-03-16 | 2016-10-19 | 沈阳新松机器人自动化股份有限公司 | Large-current AC current source |
| CN106033224B (en) * | 2015-03-16 | 2018-06-08 | 沈阳新松机器人自动化股份有限公司 | A kind of high current ac current source |
| CN105827134A (en) * | 2015-12-25 | 2016-08-03 | 温州大学 | Multi-magnetic-circuit, low-voltage and large-current digital AC constant current source |
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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: 20120808 |