CN207354051U - Numerical control constant-current supply - Google Patents
Numerical control constant-current supply Download PDFInfo
- Publication number
- CN207354051U CN207354051U CN201721450240.7U CN201721450240U CN207354051U CN 207354051 U CN207354051 U CN 207354051U CN 201721450240 U CN201721450240 U CN 201721450240U CN 207354051 U CN207354051 U CN 207354051U
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- Prior art keywords
- circuit
- voltage
- power supply
- current
- microcontroller
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Abstract
The utility model discloses a kind of numerical control constant-current supply, including microcontroller, voltage-stablizer, reduction voltage circuit, current detection circuit, voltage detecting circuit, second-order filter circuit, reference circuit, key circuit and display.Voltage-stablizer input termination 7.5~24V voltages, output terminal output 5V voltages；Reduction voltage circuit input termination 7.5~24V voltages, input voltage is depressured and is exported, current detection circuit is by sampling reduction voltage circuit output voltage so as to converse output current, voltage detecting circuit samples reduction voltage circuit output voltage, microcontroller receives sampled current value and magnitude of voltage, and shown by display, then forwarding control signal by second-order filter circuit, the order that microcontroller sends control signal is triggered by key circuit to change the output current value of reduction voltage circuit and magnitude of voltage.The numerical control constant-current power supply circuit is simple in structure, efficient up to more than 90%, and maximum output current is limited within 100MV up to 3A, ripple.
Description
Technical field
The embodiment of the utility model is related to field of power supplies, in particular to a kind of numerical control constant-current supply.
Background technology
It is now more and more using the people of mobile phone with the development of science and technology and the improvement of social materialss condition, in the car
The demand of charging is also more and more strong, but the power supply that current onboard system provides is usually 12V or 24V, and traditional
Vehicle-mounted charge head efficiency is low, and power is small, and caloric value is big, and output ripple coefficient is big, and a variety of deficiencies cannot meet people's
Demand, it is therefore necessary to design a kind of power-supply device to improve existing defect, meet the daily demand of people.
Utility model content
The purpose of this utility model is that it is directed to drawbacks described above of the prior art, there is provided a kind of circuit structure is simple, effect
Rate is high, and ripple can be limited in the numerical control constant-current supply within 100MV
To realize above-mentioned purpose of utility model, the utility model employs following technical solution：A kind of numerical control constant-current supply,
Including microcontroller, voltage-stablizer, reduction voltage circuit, current detection circuit, voltage detecting circuit, second-order filter circuit and benchmark electricity
Road；Voltage-stablizer input terminal is coupled with power supply, output terminal output voltage stabilizing electricity；Reduction voltage circuit input terminal is coupled with power supply, to power supply electricity
Exported after pressure drop pressure；Current detection circuit is coupled with microcontroller, is sent for sampling the output current of reduction voltage circuit, and by sampled value
To microcontroller；Voltage detecting circuit is coupled with microcontroller, for sampling the output voltage of supply voltage and reduction voltage circuit, and will
Sampled value gives microcontroller；Second-order filter circuit is coupling between single-chip microcomputer output and reduction voltage circuit, for microcontroller is defeated
The pwm signal gone out is converted to analog signal and is transmitted to reduction voltage circuit；Reference circuit is coupled with microcontroller, for providing a base
Quasi- voltage is calibrated to microcontroller.
In addition, the utility model also provides following attached technical scheme：
The model STC15F2K60S2 of microcontroller.
The model 78L05 of voltage-stablizer, its input terminal are coupled with power supply, and input voltage is 7.5~24V, and output voltage is
5V。
Reduction voltage circuit includes power supply chip and its peripheral circuit, the model MP1584 of power supply chip, and peripheral circuit includes
Filter capacitor, bleeder circuit, coupled capacitor, resistance to earth, RC oscillating circuits, LC oscillating circuits and diode；Wherein, filtered electrical
Appearance is coupling in power supply chip VIN sides, for giving power supply chip after source current is filtered；Bleeder circuit and power supply chip EN feet
Coupling, for providing an enabled voltage；The BST feet bootstrapping of power supply chip, SW feet are connected to by coupled capacitor；Resistance to earth
Coupled with power supply chip F feet, for controlling the working frequency of power supply chip；RC oscillating circuits are coupled with power supply chip COMP feet,
For providing compensation circuit control frequency to power supply chip；LC oscillating circuits are coupled with power supply chip SW feet, for as output
Energy storage is held to use；Diode is coupled with power supply chip SW feet, for provide a forward voltage drop for output terminal with reduce loss and
Recovery time.
Current detection circuit includes inspection leakage resistance and differential amplifier circuit, and inspection leakage resistance is coupling in reduction voltage circuit output terminal,
Differential amplifier circuit carries out amplifier to inspection leakage resistance both end voltage, and is sent into microcontroller.
Voltage detecting circuit includes the first bleeder circuit and the second bleeder circuit, and the first bleeder circuit is coupling in power end,
For carrying out partial pressure to power end input voltage and giving microcontroller sampling, the second bleeder circuit is coupling in reduction voltage circuit output
End, for carrying out partial pressure to reduction voltage circuit output voltage and giving microcontroller sampling.
Second-order filter circuit is RC second-order filter circuits.
Reference circuit includes tri- end adjustable shunt reference sources of TL431 and current-limiting resistance, tri- end adjustable shunt reference sources of TL431
1st foot is coupled with microcontroller, and the 2nd foot ground connection, the 3rd foot connects output end of voltage stabilizer by current-limiting resistance.
Numerical control constant-current supply further includes key circuit and display, and key circuit is used for the voltage for presetting reduction voltage circuit output
Value and current value, display are used for the magnitude of voltage and current value for showing reduction voltage circuit output.
Key circuit includes the first button for switching electric current/voltage, for setting the second button added, for setting
The 3rd button subtracted.
Compared with the prior art, the advantage of the numerical control constant-current supply of the utility model is：It mainly includes microcontroller, steady
Depressor, reduction voltage circuit, current detection circuit, voltage detecting circuit, second-order filter circuit, reference circuit, key circuit and aobvious
Show device.Voltage-stablizer input termination 7.5~24V voltages, output terminal output 5V voltages, the light current member of 5V voltages supply whole system
Device uses；Reduction voltage circuit input termination 7.5~24V voltages, are depressured input voltage and are exported, current detection circuit leads to
For over-sampling reduction voltage circuit output voltage so as to converse output current, voltage detecting circuit sampling reduction voltage circuit output voltage is single
Piece machine receives sampled current value and magnitude of voltage, and is shown by display, then forwards control signal by second-order filter circuit
To change the output current value of reduction voltage circuit and magnitude of voltage, the order that microcontroller sends control signal is triggered by key circuit.Should
Numerical control constant-current power supply circuit is simple in structure, efficient up to more than 90%, and maximum output current is up to 3A, and supports to pass through
Button changes output voltage and limitation electric current, and ripple is limited within 100MV.
Brief description of the drawings
In order to illustrate more clearly of the technical solution of the utility model embodiment, embodiment or correlation technique will be retouched below
Attached drawing is briefly described needed in stating, it should be apparent that, it is new that drawings in the following description merely relate to this practicality
Some embodiments of type, are not limitation of the utility model.
Fig. 1 is the circuit diagram of the numerical control constant-current supply of the utility model preferred embodiment.
Embodiment
In order to be more clearly understood that the above-mentioned purpose of the utility model, feature and advantage, below in conjunction with the accompanying drawings and have
Body embodiment makees technical solutions of the utility model further nonrestrictive detailed description.
See Fig. 1, the numerical control constant-current supply of the present embodiment include microcontroller, voltage-stablizer, reduction voltage circuit, current detection circuit,
Voltage detecting circuit, second-order filter circuit, reference circuit, key circuit and display.
The model STC15F2K60S2 of microcontroller U1, its power supply termination output end of voltage stabilizer.
The model 78L05 of voltage-stablizer U2, its input terminal are coupled with power supply (VCC-IN), and input voltage is 7.5~24V,
Output voltage is 5V.Power supply (VCC-IN) existing power supply unit, such as vehicle power supply.
Reduction voltage circuit includes power supply chip U3 and its peripheral circuit, and peripheral circuit includes filter capacitor C2 (10 μ F), partial pressure
Circuit, coupled capacitor C1 (100nF), resistance to earth R4 (200K), RC oscillating circuits, LC oscillating circuits and diode D1, wherein
Bleeder circuit include resistance R1 (24K) and resistance R3 (100K) again, RC oscillating circuits include resistance R7 (68K), capacitance C4 again
(220pF) and capacitance C5 (22pF), LC oscillating circuits include inductance L1 (10mH) and capacitance C3 (22 μ F) again.
The model MP1584 of power supply chip, maximum output current is up to 3A.Filter capacitor C2 is coupling in power supply chip VIN
Side, for giving power supply chip after source current is filtered.Bleeder circuit is coupled with power supply chip EN feet, is made for providing one
Can voltage.The BST feet bootstrapping of power supply chip, SW feet are connected to by coupled capacitor C1.Resistance to earth R4 and power supply chip F foot couplings
Close, for controlling the working frequency of power supply chip, by adjusting the predeterminable working frequencies of R4, therefore resistance to earth R4 can use electricity
Position device (adjustable resistance).RC oscillating circuits are coupled with power supply chip COMP feet, for providing the control of compensation circuit to power supply chip
Frequency.LC oscillating circuits are coupled with power supply chip SW feet, for being used as output terminal energy storage.Diode D1 and power supply chip SW
Foot couples, for providing a forward voltage drop for output terminal to reduce loss and recovery time.Diode D1 can use Schottky
Diode.
Current detection circuit includes inspection leakage resistance R2 and differential amplifier circuit, and differential amplification resistance mainly includes LM258 and transports
Calculate amplifier U4.The resistance value of inspection leakage resistance R2 is smaller, and the present embodiment uses 0.001 Ω.Inspection leakage resistance R2 is coupling in reduction voltage circuit
Output terminal (SW feet), the in-phase end and end of oppisite phase of operational amplifier U4 are connected on the both ends of inspection leakage resistance R2, operational amplifier respectively
The output voltage of U4 is the value of magnification for some multiples for examining leakage resistance R2 both end voltage differences, which is sent into microcontroller, in list
The current value of reduction voltage circuit can be calculated in piece machine according to Ohm's law.
Voltage detecting circuit includes the first bleeder circuit and the second bleeder circuit, and the first bleeder circuit includes the resistance of series connection
R20 and resistance R21, first bleeder circuit are coupling in power end (VCC-IN), for carrying out partial pressure to power end input voltage
And give microcontroller sampling；Second bleeder circuit includes the resistance R22 and resistance R23 of series connection, is coupling in reduction voltage circuit output terminal,
For carrying out partial pressure to reduction voltage circuit output voltage and giving microcontroller sampling.
The voltage that reference circuit provides a 2.5V is calibrated to microcontroller, it includes tri- end adjustable shunt reference sources of TL431
With current-limiting resistance R12, the 1st foot of tri- end adjustable shunt reference sources of TL431 is coupled with the 13rd foot of microcontroller, the 2nd foot ground connection, the 3rd foot
5V voltages are connect by current-limiting resistance.
Key circuit is used for the magnitude of voltage and current value for presetting reduction voltage circuit output, including for switching electric current/voltage
First button, for setting the second button added, for setting the 3rd button subtracted.Microcontroller is triggered by key circuit to export
Pwm signal, the pwm signal turn after the RC second-order filter circuits being made of resistance R10, resistance R11, capacitance C6, capacitance C7
Analog voltage is changed to, which is input to the FB ends of power supply chip U3, and the voltage of U3 outputs is controlled.
Display uses OLED display screen, for showing the magnitude of voltage and current value of reduction voltage circuit output.
It is pointed out that above-mentioned preferred embodiment is only to illustrate the technical concepts and features of the utility model, its purpose
The content that is to allow person skilled in the art to understand the utility model is simultaneously implemented according to this, can not limit this reality with this
With new protection domain.All equivalent change or modifications made according to the utility model Spirit Essence, should all cover in this reality
Within new protection domain.
Claims (10)
- A kind of 1. numerical control constant-current supply, it is characterised in that：Including microcontroller, voltage-stablizer, reduction voltage circuit, current detection circuit, electricity Press detection circuit, second-order filter circuit and reference circuit；Voltage-stablizer is coupled with power supply, for exporting voltage stabilizing electricity；Reduction voltage circuit is coupled with power supply, for supply voltage reduced output voltage；Current detection circuit is coupled with microcontroller, and microcontroller is given for sampling the output current of reduction voltage circuit, and by sampled value；Voltage detecting circuit is coupled with microcontroller, for sampling the output voltage of supply voltage and reduction voltage circuit, and will sampling Value gives microcontroller；Second-order filter circuit is coupling between single-chip microcomputer output and reduction voltage circuit, and the pwm signal for microcontroller to be exported turns It is changed to analog signal and is transmitted to reduction voltage circuit；Reference circuit is coupled with microcontroller, is calibrated for providing a reference voltage to microcontroller.
- 2. numerical control constant-current supply according to claim 1, it is characterised in that：The model of the microcontroller STC15F2K60S2。
- 3. numerical control constant-current supply according to claim 1, it is characterised in that：The model 78L05 of the voltage-stablizer, its is defeated Enter end to couple with power supply, input voltage is 7.5~24V, output voltage 5V.
- 4. numerical control constant-current supply according to claim 1, it is characterised in that：The reduction voltage circuit include power supply chip and its Peripheral circuit, the model MP1584 of power supply chip, peripheral circuit include filter capacitor, bleeder circuit, over the ground coupled capacitor, electricity Resistance, RC oscillating circuits, LC oscillating circuits and diode；Wherein, filter capacitor is coupling in power supply chip VIN sides, for by power supply Power supply chip is given after current filtering；Bleeder circuit is coupled with power supply chip EN feet, for providing an enabled voltage；Power supply core The BST feet bootstrapping of piece, SW feet are connected to by coupled capacitor；Resistance to earth is coupled with power supply chip F feet, for controlling power supply core The working frequency of piece；RC oscillating circuits are coupled with power supply chip COMP feet, for providing compensation circuit control frequency to power supply chip Rate；LC oscillating circuits are coupled with power supply chip SW feet, for being used as output terminal energy storage；Diode and power supply chip SW foot couplings Close, for providing a forward voltage drop for output terminal to reduce loss and recovery time.
- 5. numerical control constant-current supply according to claim 1, it is characterised in that：The current detection circuit includes inspection leakage resistance And differential amplifier circuit, inspection leakage resistance are coupling in reduction voltage circuit output terminal, differential amplifier circuit to inspection leakage resistance both end voltage into Row amplifier, and it is sent into microcontroller.
- 6. numerical control constant-current supply according to claim 1, it is characterised in that：The voltage detecting circuit includes the first partial pressure Circuit and the second bleeder circuit, the first bleeder circuit are coupling in power end, for carrying out partial pressure to power end input voltage and sending Sampled to microcontroller, the second bleeder circuit is coupling in reduction voltage circuit output terminal, for carrying out partial pressure to reduction voltage circuit output voltage And give microcontroller sampling.
- 7. numerical control constant-current supply according to claim 1, it is characterised in that：The second-order filter circuit is RC second-order filters Circuit.
- 8. numerical control constant-current supply according to claim 1, it is characterised in that：The reference circuit can including tri- ends of TL431 Shunt reference source and current-limiting resistance, the 1st foot of tri- end adjustable shunt reference sources of TL431 is adjusted to be coupled with microcontroller, the 2nd foot ground connection, the 3rd Foot connects output end of voltage stabilizer by current-limiting resistance.
- 9. numerical control constant-current supply according to claim 1, it is characterised in that：Further include key circuit and display, button Circuit be used for preset reduction voltage circuit output magnitude of voltage and current value, display be used for show reduction voltage circuit output magnitude of voltage and Current value.
- 10. numerical control constant-current supply according to claim 9, it is characterised in that：The key circuit includes being used to switch electricity First button of stream/voltage, the 3rd button for setting the second button added, subtracting for setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721450240.7U CN207354051U (en) | 2017-11-03 | 2017-11-03 | Numerical control constant-current supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721450240.7U CN207354051U (en) | 2017-11-03 | 2017-11-03 | Numerical control constant-current supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207354051U true CN207354051U (en) | 2018-05-11 |
Family
ID=62353586
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721450240.7U Expired - Fee Related CN207354051U (en) | 2017-11-03 | 2017-11-03 | Numerical control constant-current supply |
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| Country | Link |
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| CN (1) | CN207354051U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111426963A (en) * | 2020-04-20 | 2020-07-17 | 上海和宗焊接设备制造有限公司 | Electric quantity sampling and measuring system of battery welding machine and testing method thereof |
-
2017
- 2017-11-03 CN CN201721450240.7U patent/CN207354051U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111426963A (en) * | 2020-04-20 | 2020-07-17 | 上海和宗焊接设备制造有限公司 | Electric quantity sampling and measuring system of battery welding machine and testing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180511 Termination date: 20181103 |
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| CF01 | Termination of patent right due to non-payment of annual fee |