无刷电机怎么写停机程序

方法如下：

首先先把六路PWM关掉，然后，可以使三个下管导通当作电子刹车。如果还对降速要求高，可以适当加些反向控制。但是需要考虑反向带来的危害。

电动车无刷电机控制器需要编程电压的这个东西都是需要设置好的，不然的话电机它的输出功率就是有大有小嘛，如果输大了的话，你的续航里程还有就是行驶速度都会影响，所以厂家在出厂之前都会先给电动车的电机进行程序设计，比如说它的输出功率，进行设置

#include<c8051f120.h>

#define uint unsigned int

#define uchar unsigned char

uchar num1 = 0

uint v_set = 40

xdata uint pcacap2

xdata uchar dutycycle

uint A=10//float D=0.04float C=5

//int xdata e0=0,e1=0,e2=0

float xdata PWM=0

bit isnewdata

bit DIRECTON

#define POSITIVE DIRECTON = 1

#define NEGATIVE DIRECTON = 0

void Oscillator_Init()

{

SFRPAGE = CONFIG_PAGE

OSCICN= 0x83

}

void Port_IO_Init()

{

SFRPAGE = 0x0F

XBR0 = 0xF7

XBR2 = 0x40

}

void PCA_Init()

{

SFRPAGE=0x00

PCA0CPM0=0x02

PCA0CPM1=0x02

PCA0CPM2=0x21

PCA0CPL2=0x00

PCA0CPH2=0x00

PCA0MD=0x00

PCA0CN=0x40

EIE1|=0x08

}

void PWM_set(uchar low)

{//占空比设置，高电平占空比为(256-low)/256

SFRPAGE = PCA0_PAGE

if (DIRECTON == 1) {PCA0CPH0 = lowPCA0CPM1 = 0x02PCA0CPM0 = 0x42}

else {PCA0CPH1 = lowPCA0CPM0 = 0x02PCA0CPM1 = 0x42}

}

void PCA_ISR(void) interrupt 9 using 1 {

static xdata uint tmpcnt=0

static xdata uint PCA0CP2=0

xdata uint tmpcnt2

if(CCF2){

tmpcnt2 = PCA0CPH2

tmpcnt2 = tmpcnt2<<8

PCA0CP2 = tmpcnt2 + PCA0CPL2

pcacap2 = PCA0CP2-tmpcnt

tmpcnt = PCA0CP2

CCF2=0

}

}

PID_SC(uint v)

{

int Uk_zint e

e = v - v_set

//e1 = v1 - v_set

//e2 = v2 - v_set

//v2 = v1

//v1 = v

Uk_z = A*e/*+ D*e0 + C*(e0 - 2*e1 + e2)*/

//Uk0 = Uk1 + Uk_z

//Uk1 = Uk0

//PWM = PWM - 256

dutycycle = 0.0256 * Uk_z

}

void main()

{

//Oscillator_Init()

WDTCN = 0x07

WDTCN = 0xDE

WDTCN = 0xAD

Port_IO_Init()

EA=1

num1=0

isnewdata=0

PCA_Init()

POSITIVE

while(1){PID_SC(pcacap2)PWM_set(dutycycle)}

}

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