基于STM32的程控電子負(fù)載電路圖與源碼設(shè)計(jì)

ID:306302 · 發(fā)表于 2018-7-19 10:05

本人為初學(xué)者，內(nèi)容十分貧乏，歡迎各位指點(diǎn)。

電路原理圖如下：

恒流模式
用設(shè)定電流乘R2，得到電壓值，根據(jù)這個(gè)電壓調(diào)節(jié)基準(zhǔn)電壓，使電流穩(wěn)定在設(shè)定值

恒阻模式
在P4處采到電壓，得到待測(cè)電壓值，根據(jù)設(shè)定阻值得到MOS管和R2處的電流，算出R2的電壓，在調(diào)節(jié)基準(zhǔn)電壓使得阻值穩(wěn)定

Altium Designer畫的程控電子負(fù)載原理圖和PCB圖如下：(51hei附件中可下載工程文件)

stm32單片機(jī)源程序如下:

#include "stm32f10x.h"
#include "delay.h"
#include "adc.h"
#include "oled.h"
#include "DAC.h"
#include "key.h"
#include "usart.h"
#include "24cxx.h"
void oled_show(int a);
int main(void)
{
float adc1,u1;
float set_I = 100,u,I,R = 2.71,set_R = 100,set_P = 1.00,temp;
u16 key, i =0,j=0;
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); //設(shè)置NVIC中斷分組2:2位搶占優(yōu)先級(jí)，2位響應(yīng)優(yōu)先級(jí)
uart_init(115200); //串口初始化為115200
Adc1_Init();
Dac1_Init();
delay_init(); //延時(shí)函數(shù)初始化
KEY_Init();
OLED_Init();
OLED_Clear();
delay_init();
AT24CXX_Init();
while(1)
{
oled_show(0);
key =KEY_Scan(0);
if (key ==KEY0_PRES)//恒流模式
{
OLED_Clear();
oled_show(1);
while(1)
{
adc1 = Get_Adc1_Average(ADC_Channel_1, 10);
u1 = adc1/4096*3.3/0.99*10.993;
key =KEY_Scan(0);
if (key ==WKUP_PRES)
{
set_I = set_I+10;
if (set_I>1000) set_I =1000;
}
if (key ==KEY1_PRES)
{
set_I = set_I-10;
if (set_I<100) set_I =100;
}
u =set_I/1000*R;
Dac1_Set_Vol(u*1000);
if (key ==KEY2_PRES)
{
temp =u*100;
AT24CXX_WriteLenByte(0+4*i,temp,4);
i++;if (i == 10) i = 0;
}
if (key ==KEY0_PRES)
{
temp = AT24CXX_ReadLenByte(0+4*j,4);
temp = temp/100;
OLED_ShowUnFloat(90, 6, temp, 2, 2, 12);
j++;if (j == 10) j = 0;
}
I = u/R*1000;
OLED_ShowUnFloat(30, 2, u1, 2, 4, 12);
OLED_ShowUnNum(40, 4, set_I, 4,12);
OLED_ShowUnFloat(40, 6, u, 2, 2, 12);
OLED_ShowUnNum(40, 7, I, 4, 12);
}
}
if (key ==KEY1_PRES)//恒阻模式
{
OLED_Clear();
oled_show(2);
while(1)
{
adc1 = Get_Adc1_Average(ADC_Channel_1, 10);
u1 = adc1/4096*3.3/0.99*10.993;
key =KEY_Scan(0);
if (key ==WKUP_PRES)
{
set_R = set_R+1000;
if (set_R >10000) set_R =10000;
}
if (key ==KEY1_PRES)
{
set_R = set_R-1000;
if (set_R <15) set_R = 15;
}
if (key ==KEY2_PRES)
{
temp =u*100;
AT24CXX_WriteLenByte(0+4*i,temp,4);
i++;if (i == 10) i = 0;
}
if (key ==KEY0_PRES)
{
temp = AT24CXX_ReadLenByte(0+4*j,4);
temp = temp/100;
OLED_ShowUnFloat(90, 6, temp, 2, 2, 12);
j++;if (j == 10) j = 0;
}
u = u1/set_R*R;
Dac1_Set_Vol(u*1000);
I = u/R*1000;
OLED_ShowUnFloat(30, 2, u1, 2, 4, 12);
OLED_ShowUnNum(40, 4, set_R, 5,12);
OLED_ShowUnFloat(40, 6, u, 2, 2, 12);
OLED_ShowUnNum(40, 7, I, 4, 12);
}
}
if (key ==KEY2_PRES)//恒功率模式
{
OLED_Clear();
oled_show(3);
while(1)
{
adc1 = Get_Adc1_Average(ADC_Channel_1, 10);
u1 = adc1/4096*3.3/0.99*10.993;
key =KEY_Scan(0);
if (key ==WKUP_PRES)
{
set_P = set_P+1.00;
if (set_P > 30.00) set_P = 30.00;
}
if (key ==KEY1_PRES)
{
set_P = set_P-1.00;
if (set_P < 1.00) set_P = 1.00;
}
if (key ==KEY2_PRES)
{
temp =u*100;
AT24CXX_WriteLenByte(0+4*i,temp,4);
i++;if (i == 10) i = 0;
}
if (key ==KEY0_PRES)
{
temp = AT24CXX_ReadLenByte(0+4*j,4);
temp = temp/100;
OLED_ShowUnFloat(90, 6, temp, 2, 2, 12);
j++;if (j == 10) j = 0;
}
u = set_P/u1*R;
Dac1_Set_Vol(u*1000);
I = u/R*1000;
OLED_ShowUnFloat(30, 2, u1, 2, 4, 12);
OLED_ShowUnFloat(40, 4, set_P,2,2,12);
OLED_ShowUnFloat(40, 6, u, 2, 2, 12);
OLED_ShowUnNum(40, 7, I, 4, 12);
}
}
}
}
void oled_show(int a)
{
if (a == 0)
{
OLED_ShowCHinese(17,0,0);
OLED_ShowCHinese(34,0,1);
OLED_ShowCHinese(50,0,2);
OLED_ShowCHinese(67,0,3);
OLED_ShowCHinese(17,3,0);
OLED_ShowCHinese(34,3,4);
OLED_ShowCHinese(50,3,2);
OLED_ShowCHinese(67,3,3);
OLED_ShowCHinese(17,6,0);
OLED_ShowCHinese(34,6,5);
OLED_ShowCHinese(50,6,6);
OLED_ShowCHinese(67,6,2);
OLED_ShowCHinese(84,6,3);
}
if (a == 1)
{
OLED_ShowCHinese(0,0,0);
OLED_ShowCHinese(17,0,1);
OLED_ShowCHinese(34,0,2);
OLED_ShowCHinese(50,0,3);
OLED_ShowString(0,2, "Uin= V",12);
OLED_ShowString(0,4, "Iset= mA",12);
OLED_ShowString(0,6, "Uout= V",12);
OLED_ShowString(0,7, " I = mA",12);
}
if (a == 2)
{
OLED_ShowCHinese(0,0,0);
OLED_ShowCHinese(17,0,4);
OLED_ShowCHinese(34,0,2);
OLED_ShowCHinese(50,0,3);
OLED_ShowString(0,2, "Uin= V",12);
OLED_ShowString(0,4, "Rset= R",12);
OLED_ShowString(0,6, "Uout= V",12);
OLED_ShowString(0,7, " I = mA",12);
}
if (a == 3)
{
OLED_ShowCHinese(0,0,0);
OLED_ShowCHinese(17,0,5);
OLED_ShowCHinese(34,0,6);
OLED_ShowCHinese(50,0,2);
OLED_ShowCHinese(67,0,3);
OLED_ShowString(0,2, "Uin= V",12);
OLED_ShowString(0,4, "Pset= W",12);
OLED_ShowString(0,6, "Uout= V",12);
OLED_ShowString(0,7, " I = mA",12);
}
}

復(fù)制代碼

所有資料51hei提供下載:

電子負(fù)載（自制）.rar (1.56 MB, 下載次數(shù): 154)

ID:84147 · 發(fā)表于 2018-8-8 20:10

不知，實(shí)物做出來(lái)沒有，效果如何

ID:389836 · 發(fā)表于 2019-5-16 10:26

樓主實(shí)際有做過(guò)測(cè)試嗎？效果如何

ID:544237 · 發(fā)表于 2019-7-8 16:49

感謝樓主分享

ID:55591 · 發(fā)表于 2019-7-25 14:19

感謝樓主分享

ID:377519 · 發(fā)表于 2019-8-5 12:23

學(xué)習(xí)了，我試著做一下

ID:145511 · 發(fā)表于 2020-6-16 10:01

亂發(fā),運(yùn)放都是反的.還有上面反饋也沒有.你是新手么,電流你采集的負(fù),誤導(dǎo)群友,拉出去.

ID:128989 · 發(fā)表于 2020-10-19 03:02

電路試過(guò)行不行的？

ID:832079 · 發(fā)表于 2020-10-20 09:22

感謝分享，51有你更精彩！！！！

ID:61140 · 發(fā)表于 2022-6-10 00:56

yangchun 發(fā)表于 2020-6-16 10:01
亂發(fā),運(yùn)放都是反的.還有上面反饋也沒有.

這種一看就是上電炸板的DIY,亂發(fā)貼子賺黑幣的.不理會(huì)就是了

ID:1048397 · 發(fā)表于 2022-10-24 08:50

高深，先標(biāo)記一下慢慢讀。

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基于STM32的程控電子負(fù)載電路圖與源碼設(shè)計(jì)

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