CN206282170U - A kind of alternating-current constant-current source circuit - Google Patents
A kind of alternating-current constant-current source circuit Download PDFInfo
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- CN206282170U CN206282170U CN201621034936.7U CN201621034936U CN206282170U CN 206282170 U CN206282170 U CN 206282170U CN 201621034936 U CN201621034936 U CN 201621034936U CN 206282170 U CN206282170 U CN 206282170U
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Abstract
The utility model discloses a kind of alternating-current constant-current source circuit, including DC power supply module, sine wave module, waveform filtration module, constant current tracker, power amplifier, current sampling circuit, microcontroller, output is extremely loaded after wherein DC power supply module is sequentially connected sine wave module, waveform filtration module, constant current tracker, power amplifier and current sampling circuit, constant current tracker and microcontroller described in the output end connection of described current sampling circuit, described microcontroller connection sine wave module and constant current tracker.The utility model forms negative-feedback by current sampling loop, and control to adjust output current using STM32 chips connection microcontroller, can be used to be powered heating during secondary winding electric current thermometric, and possess the function of communication, Simultaneous Stabilization is good, and fault rate is low.
Description
Technical field
The utility model is related to alternating-current constant-current source circuit, and in particular to a kind of friendship based on microprocessor control output current
Stream constant-current source circuit.
Background technology
The application of Switching Power Supply has been popularized, and this has benefited from the development and application of modern power electronics technology, and exchange is permanent
Current circuit is also one kind of Switching Power Supply, in many engineerings, in order to it is anti-interference, improve certainty of measurement or meet it is specific will
Ask, generally require constant electric current output, constant-current source circuit has constant output current, temperature stability good, response quickly etc.
Feature, the method for designing of constant-current source circuit has various, and simplest constant-current source circuit is made up of discrete component, i.e., transistor is permanent
Stream source, FET-constant current source and current regulator diode circuit, but it has that output current value is limited, and stability is poor, circuit is multiple
It is miscellaneous to wait not enough, it is impossible to the requirement being powered to heating when meeting secondary winding electric current thermometric.
Utility model content
In view of the shortcomings of the prior art, the utility model provides a kind of alternating-current constant-current source circuit, can be used for Secondary Winding electricity
Heating is powered during stream thermometric, while its is easy to adjust, stabilization, while control accuracy is high, in order to realize above-mentioned mesh
, the utility model is adopted the technical scheme that：
A kind of alternating-current constant-current source circuit, is powered during for secondary winding electric current thermometric to heating, and it includes supplying
It is direct current electric source module, sine wave module, waveform filtration module, constant current tracker, power amplifier, current sampling circuit, micro-
Controller, wherein DC power supply module are sequentially connected sine wave module, waveform filtration module, constant current tracker, power and put
To loading, the output end of described current sampling circuit connects described constant current tracker for output after big device and current sampling circuit
And microcontroller, described microcontroller connection sine wave module and constant current tracker.
Described alternating-current constant-current source circuit also includes central processing unit, and central processing unit passes through serial communication circuit and micro-control
Device connection processed.
Described central processing unit is STM32 chips.
Compared with prior art, the beneficial effects of the utility model are：
The utility model forms negative-feedback by current sampling loop, and is controlled using STM32 chips connection microcontroller
System adjustment output current, can be used to be powered heating during secondary winding electric current thermometric, high precision and sensitivity is good,
Response speed is fast, and possesses the function of communication, and the current data that can in real time receive input current and feedback output is big
Small, while the utility model good stability, fault rate is low.
Brief description of the drawings
Fig. 1 is circuit theory diagrams of the present utility model；
Specific embodiment
The utility model is further described with reference to specific embodiment.
A kind of alternating-current constant-current source circuit, as described in Figure 1, it includes Switching Power Supply 8, sine wave module 1, waveform filtration module
2nd, constant current tracker 3, power amplifier 4, current sampling circuit 5, microcontroller 6, wherein Switching Power Supply 8 are sequentially connected sine wave
Output is described to loading after module 1, waveform filtration module 2, constant current tracker 3, power amplifier 4 and current sampling circuit 5
Constant current tracker 3 and microcontroller 6 described in the output end connection of current sampling circuit 5, described microcontroller 6 connect sine
Ripple module 1 and constant current tracker 3.Described alternating-current constant-current source circuit also includes central processing unit 7, and central processing unit 7 is by string
Port communications circuit is connected with microcontroller 6.
In order to fully using the hardware resource of processor, used as embodiment, central processing unit 7 uses STM32 chips, and
STM32 chip prices are not high, powerful, it is easy to extend.Stability can be improved so that circuit is simple, it is easy to integrated, safeguarded into
This is low；Described DC power supply module is the Switching Power Supply 8 of multiple-channel output, and the Switching Power Supply 8 of finished product has plurality of voltages
Output, the efficiency of design is high, good stability, and band overvoltage, overcurrent protection, Switching Power Supply 8 makes with protection shell
With more safe, it is easy to install application and save the development time, save development cost, using simply can greatly simplifying hardware
The design complexities of circuit.
Operation principle of the present utility model is as follows：Switching Power Supply 8 is the DC voltage that a constant pressure source exports 14v, is passed through
Sine wave module 1 produces concussion to be transformed into standard sine wave, because produced sine wave can be mingled with harmonic wave, so to pass through
Waveform filtration module 2 removes useless waveform, the waveform of frequency and amplitude needed for being left, then by power amplifier 3 input
Signal is amplified, and its output is had carrying load ability.
Wherein, central processing unit 7 and microcontroller 6 are connected by serial communication circuit, and central processing unit 7 passes through microcontroller
The size of the controlled output electric current of device 6, and the numerical value of output current is passed to central processing unit 7 by microcontroller 6 again, and electric current is adopted
Sample loop 5 gathers the size of output current, and passes to constant current tracker 3 and microcontroller 6, and the microcontroller 6 is connected just
String ripple module 1 and constant current tracker 3, so as to can be opened and closed by an AC sampling cycle to its power switch pipe
The control of time realize the control to output current, the output current numerical value in current sampling loop 6 sends constant current to simultaneously
Tracker 3, builds a PID closed loop to realize the tracking to output current, so as to realize to defeated inside constant current tracker 3
Going out electric current carries out real-time adjustment, to reach the effect of constant output current.
Above-listed detailed description is directed to illustrating for the utility model possible embodiments, and the embodiment is simultaneously not used to limitation
The scope of the claims of the present utility model, all equivalence enforcements or change without departing from carried out by the utility model are intended to be limited solely by this case
In the scope of the claims.
Claims (4)
1. a kind of alternating-current constant-current source circuit, it is characterised in that including DC power supply module, sine wave module (1), waveform filter
Ripple module (2), constant current tracker (3), power amplifier (4), current sampling circuit (5), microcontroller (6), wherein power supply is straight
Stream power module be sequentially connected sine wave module (1), waveform filtration module (2), constant current tracker (3), power amplifier (4) and
Current sampling circuit (5) is exported to load afterwards, and the output end of described current sampling circuit (5) connects described constant current tracker
(3) and microcontroller (6), described microcontroller (6) connects sine wave module (1) and constant current tracker (3).
2. alternating-current constant-current source circuit according to claim 1, it is characterised in that described alternating-current constant-current source circuit also includes
Central processing unit (7), central processing unit (7) is connected by serial communication circuit with microcontroller (6).
3. alternating-current constant-current source circuit according to claim 2, it is characterised in that described central processing unit (7) is STM32
Chip.
4. alternating-current constant-current source circuit according to claim 1, it is characterised in that described DC power supply module is many
The Switching Power Supply (8) of road output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621034936.7U CN206282170U (en) | 2016-08-31 | 2016-08-31 | A kind of alternating-current constant-current source circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621034936.7U CN206282170U (en) | 2016-08-31 | 2016-08-31 | A kind of alternating-current constant-current source circuit |
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| Publication Number | Publication Date |
|---|---|
| CN206282170U true CN206282170U (en) | 2017-06-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621034936.7U Active CN206282170U (en) | 2016-08-31 | 2016-08-31 | A kind of alternating-current constant-current source circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114217659A (en) * | 2021-12-03 | 2022-03-22 | 国网浙江省电力有限公司建德市供电公司 | Voltage-controlled alternating current constant current source circuit and arc suppression coil automatic compensation calibration device |
-
2016
- 2016-08-31 CN CN201621034936.7U patent/CN206282170U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114217659A (en) * | 2021-12-03 | 2022-03-22 | 国网浙江省电力有限公司建德市供电公司 | Voltage-controlled alternating current constant current source circuit and arc suppression coil automatic compensation calibration device |
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