阅读说明：本技术 一种简易数控直流稳压电源装置 (Simple numerical control direct current voltage stabilizing power supply device ) 是由 孙梦瑶 孙钢虎 兀鹏越 杨沛豪 高峰 寇水潮 柴琦 王小辉 赵俊博 仵欣 于 2021-01-05 设计创作，主要内容包括：本发明公开了一种简易数控直流稳压电源装置,包括整流滤波电路、开关调整电路、电压采样电路、A/D转换单元、单片机、按键单元以及显示单元；其中,市电输出端连接整流滤波电路的输入端,整流滤波电路的输出端连接开关调整电路的输入端,开关调整电路的输出端连接可调直流输出端和电压采样电路的输入端,电压采样电路的输出端连接A/D转换单元的输入端,A/D转换单元的输出端和按键单元的输出端连接单片机的输入端,单片机的输出端连接显示单元的输入端,并通过PWM连接开关调整电路的控制端。本发明解决了模拟可调稳压电源的数据不可读和电压不稳定等问题。(The invention discloses a simple numerical control direct current stabilized voltage power supply device which 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, wherein the single chip microcomputer is connected with the switch adjusting circuit; 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 invention solves the problems of unreadable data, unstable voltage and the like of the analog adjustable stabilized voltage power supply.)

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 content of the first and second substances,

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.

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.

Technical Field

The invention belongs to the field of power supply design, and particularly relates to a simple numerical control direct current stabilized 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.

Disclosure of Invention

The invention provides a simple numerical control direct current stabilized power supply device for solving the problems of unreadable data, unstable voltage and the like of an analog adjustable stabilized power supply, and aims to improve the controllability of a power supply.

The invention is realized by adopting the following technical scheme:

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.

The invention is further improved in that the singlechip adopts an AT89S52 singlechip.

The invention is further improved in that the display unit adopts a nixie tube display.

The invention is further improved in that the commercial power is 220V.

The invention is further improved in that a pulse transformer is arranged in the switching regulation circuit and is connected with a switching tube in series.

The invention has the further improvement that the rectifying filter circuit is used for converting alternating current into direct current, the direct current controls the electrification or disconnection of the 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 invention has the further improvement that 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 by the A/D conversion unit is compared with the preset voltage value in the singlechip, and the duty ratio, namely the PWM signal, is adjusted and output and sent to the switch adjusting circuit for adjustment.

The invention has the further improvement that the key unit is used for setting the given value of the preset output voltage and step control; the display unit is used for displaying the transition process from the original voltage to the preset voltage.

The invention has at least the following beneficial technical effects:

(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 a PWM and switching regulator circuit of the present invention.

FIG. 3 is a diagram of a voltage sampling circuit according to the present invention.

FIG. 4 is a schematic diagram of a voltage sampling circuit and an A/D conversion circuit according to the present invention.

Fig. 5 is a pin connection diagram of the single chip microcomputer AT89S 52.

FIG. 6 is a diagram of a quad common-cathode nixie tube lead according to the present invention.

Fig. 7 is a schematic diagram of the single-chip microcomputer AT89S52 and a digital tube display.

FIG. 8 is a block diagram of a simple digital controlled DC voltage regulator according to the present invention.

Detailed Description

The technical solution of the present invention is further described in detail by the accompanying drawings.

As shown in fig. 8, the simple digital control dc regulated power supply device provided by the present invention includes a rectifying filter circuit, a switch adjusting circuit, a voltage sampling circuit, an a/D conversion unit, a single chip, 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. 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 rectification filter 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 overvoltage 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 PWM1000HZ and 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.

As described above, any simple modification, change or equivalent structural change made to the above embodiment according to the technical spirit of the present invention still falls within the scope of the technical solution of the present invention.