基于磁链观测器的C语言算法
时间: 2023-06-17 09:07:58 浏览: 221
磁链观测器是一种用于检测电机转子位置的传感器,它可以通过测量磁链信号来确定转子的位置。以下是一个基于C语言实现的磁链观测器算法的示例:
```c
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#define PI 3.14159265358979323846
// 磁链观测器参数
#define R 0.5 // 电机转子半径
#define p 4 // 极对数
#define L 0.001 // 电机的电感
#define J 0.01 // 电机的转动惯量
#define Ke 0.05 // 电动势常数
#define Kb 0.05 // 反电动势常数
#define Ts 0.0001 // 采样周期
#define Tm 0.001 // 电机机械时常
// 磁链观测器状态
typedef struct {
double theta; // 电机转子角度
double omega; // 电机转子角速度
double iq; // 电机磁通电流
double id; // 电机直轴电流
double vq; // 电机磁通电压
double vd; // 电机直轴电压
double Ls; // 电机的有效电感
double Lsigma; // 电机的总电感
double Rs; // 电机的电阻
double Tau; // 电机的机械时常
double Ke; // 电动势常数
double Kb; // 反电动势常数
double Vdc; // 直流电压
double Tload; // 电机的负载转矩
double Tm; // 电机的机械时常
double Ts; // 采样周期
} ObserverState;
// 磁链观测器初始化函数
void ObserverInit(ObserverState *state, double theta0, double omega0, double Ls, double Rs, double Tau, double Ke, double Kb, double Vdc, double Ts) {
state->theta = theta0;
state->omega = omega0;
state->iq = 0;
state->id = 0;
state->vq = 0;
state->vd = 0;
state->Ls = Ls;
state->Lsigma = Ls + L;
state->Rs = Rs;
state->Tau = Tau;
state->Ke = Ke;
state->Kb = Kb;
state->Vdc = Vdc;
state->Tload = 0;
state->Tm = Tm;
state->Ts = Ts;
}
// 磁链观测器更新函数
void ObserverUpdate(ObserverState *state, double ia, double ib, double ic, double Va, double Vb, double Vc) {
double sinTheta = sin(state->theta);
double cosTheta = cos(state->theta);
double sa = sinTheta * Va + cosTheta * ia;
double sb = sinTheta * Vb + cosTheta * ib;
double sc = sinTheta * Vc + cosTheta * ic;
double va = 2.0 / 3.0 * (sa - 0.5 * sb - 0.5 * sc);
double vb = 2.0 / 3.0 * (sqrt(3) / 2 * sb - sqrt(3) / 2 * sc);
double vc = 2.0 / 3.0 * (-0.5 * sb - 0.5 * sc);
double Tload = state->Tload;
double Ls = state->Ls;
double Lsigma = state->Lsigma;
double Rs = state->Rs;
double Tau = state->Tau;
double Ke = state->Ke;
double Kb = state->Kb;
double Vdc = state->Vdc;
double Ts = state->Ts;
double iq = state->iq;
double id = state->id;
double vq = state->vq;
double vd = state->vd;
double omega = state->omega;
double theta = state->theta;
double domega;
double did;
double diq;
double dvq;
double dvd;
double Tm = state->Tm;
double S;
// 计算电机电流
iq += Ts * (-(Rs / Lsigma) * iq - (Ke / Lsigma) * omega + vb / Lsigma);
id += Ts * (-(Rs / Lsigma) * id - (Ke / Lsigma) * omega - va / Lsigma);
dvq = vq - iq * Rs - Ke * omega;
dvd = vd - id * Rs + Ke * omega;
// 计算磁链观测器状态值
diq = Ts * (-(1 / Ls) * iq + (1 / Ls) * (vq - Rs * iq - Ke * omega));
did = Ts * (-(1 / Ls) * id + (1 / Ls) * (vd - Rs * id + Ke * omega));
S = sqrt(did * did + diq * diq);
domega = Ts * ((1 / J) * (Tload - Tm) - (Ke / J) * iq);
theta += omega * Ts;
omega += domega;
vq += dvq;
vd += dvd;
// 更新磁链观测器状态
state->iq = iq;
state->id = id;
state->vq = vq;
state->vd = vd;
state->omega = omega;
state->theta = theta;
state->Tload = Tload;
}
```
这是一个简单的磁链观测器算法,它通过测量电机的电流和电压,以及估计的电机参数来计算转子的角度和角速度。在这个示例中,我们假设电机的参数是已知的,并且没有噪声或扰动。在实际应用中,需要考虑更多的因素,例如噪声、扰动和参数变化等。
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