CN213750801U - Simple numerical control direct current voltage stabilizing power supply device - Google Patents
Simple numerical control direct current voltage stabilizing power supply device Download PDFInfo
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- CN213750801U CN213750801U CN202120015526.2U CN202120015526U CN213750801U CN 213750801 U CN213750801 U CN 213750801U CN 202120015526 U CN202120015526 U CN 202120015526U CN 213750801 U CN213750801 U CN 213750801U
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Abstract
The utility model discloses a simple numerical control direct current stabilized voltage power supply device, which comprises a rectification filter circuit, a switch adjusting circuit, a voltage sampling circuit, an A/D conversion unit, a singlechip, a key unit and a display unit; the utility power output end is connected with the input end of the rectification filter circuit, the output end of the rectification filter circuit is connected with the input end of the switch adjusting circuit, the output end of the switch adjusting circuit is connected with the adjustable direct current output end and the input end of the voltage sampling circuit, the output end of the voltage sampling circuit is connected with the input end of the A/D conversion unit, the output end of the A/D conversion unit and the output end of the key unit are connected with the input end of the single chip microcomputer, and the output end of the single chip microcomputer is connected with the input end of the display unit and is connected with the control end of the switch adjusting circuit through PWM. The utility model provides a data unreadable and the unstable scheduling problem of voltage of adjustable constant voltage power supply of simulation.
Description
Technical Field
The utility model belongs to power design field, concretely relates to simple and easy numerical control direct current constant voltage power supply device.
Background
The voltage-stabilized power supply is one of key devices for ensuring the stable operation of the numerical control technology, can ensure the high-efficiency and low-power-consumption operation of a system, and has important application value in the production activities of various fields of human beings.
As the simple direct current stabilized voltage supply is a common instrument and equipment, the simple direct current stabilized voltage supply is widely applied in scientific research and experiments, and the use efficiency and the reliability of the simple direct current stabilized voltage supply also determine the accuracy of experimental data. However, the prior art has the problems of unreadable data, unstable voltage and the like of the analog adjustable voltage-stabilized power supply.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve the unreadable and voltage unstability scheduling problem of data of the adjustable constant voltage power supply of simulation, provide a simple and easy numerical control direct current constant voltage power supply device, improve the controllability of power.
The utility model discloses a following technical scheme realizes:
a simple numerical control direct current stabilized voltage power supply device comprises a rectifying filter circuit, a switch adjusting circuit, a voltage sampling circuit, an A/D conversion unit, a single chip microcomputer, a key unit and a display unit; the utility power output end is connected with the input end of the rectification filter circuit, the output end of the rectification filter circuit is connected with the input end of the switch adjusting circuit, the output end of the switch adjusting circuit is connected with the adjustable direct current output end and the input end of the voltage sampling circuit, the output end of the voltage sampling circuit is connected with the input end of the A/D conversion unit, the output end of the A/D conversion unit and the output end of the key unit are connected with the input end of the single chip microcomputer, and the output end of the single chip microcomputer is connected with the input end of the display unit and is connected with the control end of the switch adjusting circuit through PWM.
The utility model discloses further improvement lies in, and the singlechip adopts AT89S52 singlechip.
The utility model discloses a further improvement lies in, and the display element adopts the charactron display.
The utility model discloses further improvement lies in, the commercial power is 220V voltage.
The utility model discloses a further improvement lies in, switch adjusting circuit is inside to have pulse transformer and has concatenated a switch tube.
The utility model discloses further improvement lies in, rectifier filter circuit is used for becoming the direct current with the alternating current, and the direct current then controls the circular telegram or the disconnection of the switching tube that once inclines through switch adjusting circuit, finally presents a voltage duty cycle that inclines low than once on the secondary side, and the adjustable DC voltage of output is through voltage sampling circuit.
The utility model discloses further improvement lies in, AD converting unit is arranged in converting the analog voltage that voltage sampling circuit sent to digital voltage and sending to the singlechip, compares from the preset voltage value in AD converting unit output and the singlechip, adjusts output duty ratio and adjusts in PWM signal sends into switch adjustment circuit promptly.
The utility model has the further improvement that the key unit is used for setting the given value and the step control of the preset output voltage; the display unit is used for displaying the transition process from the original voltage to the preset voltage.
The utility model discloses at least, following profitable technological effect has:
(1) the digital adjustable voltage-stabilized power supply based on the single chip microcomputer is low in price, can realize specific functions by adopting common elements, and is clear and intuitive in display; (2) the circuit is simple, the function is practical, the precision is high, the adjustment is easy, the working efficiency is high, and the reliability is good; (3) the output voltage value can be displayed by an LED display screen; (4) the output direct current voltage Uo is + 1V- +12V adjustable, the ripple is not more than 10mV, the step value is 0.1V, and the voltage stabilizing coefficient is less than 0.003.
Drawings
Fig. 1 is a complete schematic block diagram of the system of the present invention.
Fig. 2 is a schematic diagram of the PWM and switch adjusting circuit of the present invention.
Fig. 3 is a circuit diagram of the voltage sampling circuit of the present invention.
Fig. 4 is a schematic diagram of the voltage sampling circuit and the a/D conversion circuit of the present invention.
Fig. 5 is the pin connection diagram of the single chip AT89S52 of the present invention.
Fig. 6 is a pin diagram of the quadbit common cathode nixie tube of the present invention.
Fig. 7 is a schematic diagram of the single-chip microcomputer AT89S52 and the digital tube display of the present invention.
Fig. 8 is a block diagram of the simple digital controlled dc voltage-stabilized power supply of the present invention.
Detailed Description
The technical solution of the present invention is further described in detail through the attached drawings.
As shown in fig. 8, the utility model provides a simple and easy numerical control dc voltage-stabilized power supply device, including rectification filter circuit, switch adjusting circuit, voltage sampling circuit, a/D conversion unit, singlechip, button unit and display element; the utility power output end is connected with the input end of the rectification filter circuit, the output end of the rectification filter circuit is connected with the input end of the switch adjusting circuit, the output end of the switch adjusting circuit is connected with the adjustable direct current output end and the input end of the voltage sampling circuit, the output end of the voltage sampling circuit is connected with the input end of the A/D conversion unit, the output end of the A/D conversion unit and the output end of the key unit are connected with the input end of the single chip microcomputer, and the output end of the single chip microcomputer is connected with the input end of the display unit and is connected with the control end of the switch. The switch adjusting circuit is internally provided with a pulse transformer and is connected with a switch tube in series.
The key unit is used for setting a given value of preset output voltage and step control; the display unit is used for displaying a transition process from an original voltage to a preset voltage, the rectifying and filtering circuit is used for converting alternating current into direct current, the direct current controls the electrification or disconnection of a primary side switching tube through the switch adjusting circuit, finally, a voltage duty ratio lower than that of the primary side is presented on the secondary side, and the output adjustable direct current voltage passes through the voltage sampling circuit; the A/D conversion unit is used for converting the analog voltage sent by the voltage sampling circuit into digital voltage and sending the digital voltage to the singlechip, the voltage information output from the A/D conversion unit is compared with the preset voltage value in the singlechip, and the output duty ratio is adjusted, namely the PWM signal is sent to the switch adjusting circuit for adjustment.
The output voltage control section: the output voltage is directly set through the number keys and the decimal points of the keyboard, or the voltage increase or decrease is realized through plus-minus keys.
The stabilized voltage output section: and the PWM signal drives the switching power supply module to output.
The operating state display section: the digital tube display is driven by the single-product machine to display.
As shown in FIG. 1, the principle of the numerical control DC stabilized power supply comprises a main line and a feedback part
The main line is used for driving the switch power supply module by using a PWM signal according to a voltage value set by the keyboard, outputting stable voltage, and displaying data such as output voltage, current and the like through a digital tube display.
The feedback part is that ADC0832 is used to convert the analog signal into digital signal and input the digital signal into the single chip system, then the digital signal is compared with the parameter set in the original program, and then the digital signal is adjusted by PWM signal and compared for many times in circulation until the digital signal meets the set value, and the voltage sampling circuit realizes the functions of overcurrent, overvoltage protection and judgment.
As shown in fig. 2, the voltage stabilizing switching circuit is composed of five main parts, namely a pulse transformer, an amplifier, a diode, a photoelectric coupler, an energy storage element (capacitor) and the like, the pulse transformer is used as a center, the left part is connected with a duty ratio square wave signal with adjustable PWM 1000HZ input by a high-frequency switching tube, and the current is emitted by a light emitting diode to enable the photoelectric coupler to generate electronic change so as to enable the photoelectric coupler to be conducted, so that the voltage stabilizing switching circuit has the function of protecting the circuit; the right part controls the voltage to be about 12V, and the connected fast recovery diode is used for rectifying the high-frequency switch circuit to enable the high-frequency switch circuit to output stable 12V direct-current voltage.
As shown in fig. 3, the voltage sampling circuit is composed of 7 resistors, two adjustable resistors connected in parallel, a capacitor and an LM324 of 1/4. The voltage sampling circuit converts the acquired voltage signal into a digital signal through the A/D converter, inputs the digital signal into the single chip microcomputer system for processing, compares the digital signal with a reference value initially set in the single chip microcomputer program, and returns to the previous step if the sampling voltage is higher than a rated value, namely the switch adjusting circuit adjusts the voltage; until the sampling voltage is less than or equal to the reference value set by the singlechip program, the voltage can be output, and the voltage at the moment is the set standard voltage.
As shown in fig. 4, in the voltage sampling circuit, ADC0832 belongs to a digital quantity part circuit, and a serial data transmission mode is adopted, in an analog quantity part, 12V can adjust the voltage through a sliding rheostat so that the input voltage and the output voltage of the whole module are the same, and 1/4LM324 on the left side has the function of reducing impedance and increasing current; and 1/4LM324 at the lower right part of the module plays a role in overcurrent protection when the voltage drop exceeds the designed current voltage drop, and the electrolytic capacitor can stably and adjustably output 12V.
As shown in fig. 5, an AT89S52 single chip microcomputer is selected, and pins are connected to control the output of the 4-bit display unit from port P1.0 to port P1.7; connecting the keying circuit from P2.0 to P2.2; p2.5 and P2.6 are connected with the A/D conversion circuit; p3.0 is connected with a sampling circuit; p3.1 is responsible for PWM output; p3.3 to P3.7 control the input of the display unit; RST is responsible for resetting of the whole single chip microcomputer system.
The pin and bit selection of the quadbit nixie tube corresponds to the segment selection as shown in fig. 6. A selected in the section corresponds to a No. 11 pin; b corresponds to a No. 7 pin; c corresponds to a No. 4 pin; d corresponds to the No. 2 pin; e corresponds to a No. 1 pin; f corresponds to a No. 10 pin; g corresponds to pin number 5. Pins 6,8,9,12 correspond to BIT1, BIT2, BIT3, BIT4, respectively. The last pin 3 is connected to DP.
As shown in FIG. 7, the display unit is connected to A, B, C, D, E, F, G, DP and is respectively connected with P1.0, P1.1, P1.2, P1.3, P1.4, P1.5, P1.6 and P1.7 of the AT89S51 chip, and the single chip internal clock system is connected with XTAL1, XTAL2 and RST.
All above, all according to the utility model discloses any simple modification, change and equivalent structure change that technical entity made to above embodiment all still belong to the utility model discloses technical scheme's protection within range.
Claims (8)
1. A simple numerical control direct current stabilized voltage power supply device is characterized by comprising a rectification filter circuit, a switch adjusting circuit, a voltage sampling circuit, an A/D conversion unit, a single chip microcomputer, a key unit and a display unit; wherein,
the utility power output end is connected with the input end of the rectification filter circuit, the output end of the rectification filter circuit is connected with the input end of the switch adjusting circuit, the output end of the switch adjusting circuit is connected with the adjustable direct current output end and the input end of the voltage sampling circuit, the output end of the voltage sampling circuit is connected with the input end of the A/D conversion unit, the output end of the A/D conversion unit and the output end of the key unit are connected with the input end of the single chip microcomputer, and the output end of the single chip microcomputer is connected with the input end of the display unit and is connected with the control end of the switch adjusting circuit through PWM.
2. The simple numerical control direct-current voltage-stabilized power supply device according to claim 1, wherein the singlechip is an AT89S52 singlechip.
3. The simple numerical control direct current stabilized power supply device according to claim 1, wherein the display unit employs a nixie tube display.
4. The simple numerical control direct-current voltage-stabilized power supply device according to claim 1, wherein the commercial power is 220V.
5. A simple digitally controlled dc voltage regulator according to claim 1 wherein the switching regulator circuit has a pulse transformer and a switching tube connected in series.
6. A simple numerically controlled DC voltage regulator as claimed in claim 5, wherein the rectifying and smoothing circuit is configured to convert AC to DC, the DC is passed through the switching regulator circuit to control the switching on and off of the primary switching transistor, and finally a lower voltage duty cycle is present on the secondary side than on the primary side, and the output regulated DC voltage is passed through the voltage sampling circuit.
7. The simple numerical control DC voltage-stabilized power supply device according to claim 6, wherein the A/D conversion unit is used for converting the analog voltage from the voltage sampling circuit into digital voltage and sending the digital voltage to the single chip microcomputer, the voltage information output from the A/D conversion unit is compared with the preset voltage value in the single chip microcomputer, and the regulated output duty ratio, that is, the PWM signal is sent to the switch regulation circuit for regulation.
8. The simple numerical control direct current voltage-stabilized power supply device according to claim 6, wherein the key unit is used for setting a given value of a preset output voltage and step control; the display unit is used for displaying the transition process from the original voltage to the preset voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120015526.2U CN213750801U (en) | 2021-01-05 | 2021-01-05 | Simple numerical control direct current voltage stabilizing power supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120015526.2U CN213750801U (en) | 2021-01-05 | 2021-01-05 | Simple numerical control direct current voltage stabilizing power supply device |
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| Publication Number | Publication Date |
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| CN213750801U true CN213750801U (en) | 2021-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120015526.2U Active CN213750801U (en) | 2021-01-05 | 2021-01-05 | Simple numerical control direct current voltage stabilizing power supply device |
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2021
- 2021-01-05 CN CN202120015526.2U patent/CN213750801U/en active Active
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