The simplest microcontroller PID control algorithm program

/*************Define global variables *****************/

Uchar Kp, TI, Td

Int Set_speed;

/*************PID initialization function***************/

Void PID_init(void){

Serror=0;

FError=0;

Kp=30;

TI=500;

Td=10;

}

Int PID_control(int Now_speed)

{

Int Error,Serror,result;

Error=Now_speed-Set_speed;

Serror=Serror+Error;

Result=(Kp*Error+Kp*0.05/TI*Serror+Kp*Td/0.05*(Error-FError));

FError=Error;

/ / Limit the duty cycle

If(result10)

{result=0;} else

If(result"1000)

{result=1000;}

Return result;

}

200V DC Electronic Load System

200V high precision DC Electronic Load provides 3 types power combination which is 39600W/52800W/66000W,highest current can reach 3000A. The DC Electronic Load System supports four kinds of basic operating mode including CV (constant voltage), CC (constant current), CR (constant resistance), CP (constant power), to satisfy a wide range of test requirements., as well as CV+CC, CV+CR, CR+CC these 3 complex operating modes.

Additionally , programmable DC electronic load can also have higher voltage for options which 600V DC Electronic Load sytem and 1200V DC Electronic Load System .

Key features are as below for your reference:

● Flippable front panel and color touch screen allow convenient access and operation

● Provides four kinds of basic working mode such as CV/CC/CR/CP, and CV+CC/CV+CR/CR+CC complex operating modes

● Adjustable current slew rate, adjustable CV loop speed

● Ultra high precision voltage & current measurement

● 50kHz high-speed CC/CR dynamic mode

● 500kHz high-speed voltage and current sampling rate

● Timing & discharging measurement for batteries

● Short circuit test mode

● Auto mode function provides an easy way to do complicated test

● V-monitor/I-monitor

● Full protection: OCP, OPP, OTP, over voltage and reverse alarm

● Front panel USB interface supports data import and export

● Using standard SCPI communication protocol

● Smart fan control with lower noise and better for environment

200V slew rate DC E-load, CV loop speed DC electronic load, 200V high precision DC electronic load

APM Technologies Ltd , https://www.apmpowersupply.com