điện
Vin = 5; %Dien ap vao bien ap
%Thong so bien ap
Rm = 1.33; %Dien tro dac trung ton hao co
Lr = 0.66e-3; %Dien cam noi tiep dau vao
Cr = 3.925e-9; %Dien dung noi tiep dau vao
n = 32; %Ty so truyen co ly tuong
Cin = 105e-9; %Dien dung dau vao PT
Co = 20e-12; %Dien dung dau ra PT
f = [90000:200:110000]; %Dai tan so tai khao sat
logaR =[0:0.1:9]; Ro = 10.^logaR;
[X,Y] = meshgrid(f,Ro); %Lenh tao luoi ve do thi
%Tinh cac thong so
omega = 2*pi.*X; %Tan so goc
R1o = Y./(n*n); %R'o
C1o = (n*n)*Co; %C'o
R2o = R1o./(1+(omega*C1o.*R1o).^2); %R"o
C2o = C1o.*((1+(omega*C1o.*R1o).^2)./(omega*C1o.*R1o).^2); %C"o
A = C1o/Cr; %A omega_rs= 1/sqrt(Lr*Cr); %omega frs = omega_rs/(2*pi); Q = omega_rs*Co*Y; Qm = 1/(omega_rs*Cr*Rm); f1 = X./frs; K1 = (1 - A*(f1.*f1 - 1) + Rm./R1o); K2 =((omega_rs./omega).*(A./Q).*(f1.^2-1)+ f1.*A/Qm); K = K1.^2 + K2.^2; %Y
%e = R2o(:,51)./(R2o(:,51)+Rm)*100; %Hieu suat bien ap
e = R2o./(R2o+Rm)*100; %Hieu suat bien ap
close all; %Xoa cac hinh hien tai
surf(X,logaR,n2); %Do thi he so bien ap
xlabel('TAN SO HOAT DONG [Hz]'); ylabel('Log10(R)');
zlabel('HE SO BIEN AP'); view(10,10);
figure;
surf(X,logaR,Po); %Do thi cong suat dau ra
xlabel('TAN SO HOAT DONG [Hz]'); ylabel('Log10(R)');
zlabel('CONG SUAT DAU RA [W]'); view(10,10);
figure; plot(logaR,e) surf(X,logaR,e);
xlabel('TAN SO HOAT DONG [Hz]'); ylabel('Log10(R)'); (adsbygoogle = window.adsbygoogle || []).push({});
zlabel('HIEU SUAT BIEN AP [%]');
view(10,10); %Dieu chinh goc nhin
e = R2o./(R2o+Rm)*100; %Hieu suat bien apmax_n2
max_n2 = max(n2'); max_Po = max(Po'); max_e = max(e');
plot(logaR,max_n2./16,'--','LineWidth',2.5); hold on;
legend('He so bien ap','Cong suat','Hieu suat');
Chương 5 2. Code điều khiển vòng hở
// Dieu khien vong ho ta dung 1 chuong trinh rat don gian xuat xung PWM co tan so xac
//dinh de cap vao bien ap ap dien
void main(void) {
tanso=103700; // hz
// Just sit and loop forever:
pwm_chan1(tanso,40) ; delay_ms(2000); while(1);
}
Chương 6 3. Code điều khiển vòng kín
#include"DSP281x_Device.h"
#include"DSP281x_Examples.h"
#define T_1 50000// Hang so thu nhat cua bo loc (us)
#define T_2 5000// Hang so thu hai cua bo loc (us)
#define U_b 5//(V)
#define K_015000 // (Don vi nay s-1*V-1) He so cua DCO
#define f_0 90000// Tan so lam viec trung tam cua DCO - Hz
Uint32 f=91000; // Bien luu tan so lam viec cua PLL
Uint32 T_lech =0; Uint32 goclechpha =0; Uint32 T_lech_percent =75; Uint32 T_lech_rect =90; // do
int duty =45;// thoi gian ns
Uint32 T=0 ; // chu ki cua U1
Uint32 T_cross=0;// thoi gian lech pha giua 2 tin hieu ngat
float Uf_cur=0.1;
signedint Q=0;// gia tri Q
float T_pos=0.0,T_neg=0.0;//(us) (adsbygoogle = window.adsbygoogle || []).push({});
int flag_phase=0; // Co bao da lay duoc T_cross
int flag=0;// Co bao toi chu ki tinh toan moi
Uint32 count=0;
// Prototype statements for functions found within this file.
interrupt void XINT_1_ISR(void);// ISR1 xac dinh xung len cua U1
interrupt void XINT_2_ISR(void);// ISR2 xac dinh xung len cua U2
void SPLL(void);
void Get_phase_dif(void);
void Update_PT_In(void);
void delay_ms(long ms)
{
DELAY_US(ms*1000);
}
void pwm_chan1(Uint32 tansoHz,int duty100)
{
EvaRegs.T1PR=75000000/tansoHz;
EvaRegs.CMPR1 =75000000/tansoHz * duty100 /100 ;
}
void Gpio_select(void);
void main() { T=1000000000/f; pwm_chan1(f,duty); delay_ms(100); while(1) { if(flag_phase==1) {
Update_PT_In();
flag_phase=0;
}
} }
void SPLL(void)// tinh toan
{ T_lech=T*(360-T_lech_rect)/360; T_cross+=T_lech; while(T_cross>=T) { T_cross-=T; }
//Tinh toan cho PFD
if(T_cross<T/2)// U se som pha so voi I, can giam tan so xuong
{
T_neg=T_cross; T_pos=0; (adsbygoogle = window.adsbygoogle || []).push({});
}
else// U tre pha so voi I, can tang tan so len
{
T_neg=0;
T_pos=T-T_cross;
}
//tinh toan cho bo loc
if(T_pos >0)
{
Uc_cur = Uc_pre + (float)(U_b - Uc_pre) * T_pos / (T_1 + T_2);
Uf_cur = Uc_cur + T_pos * T_2 * ((float)U_b-Uc_cur)/(T * (T_1 + T_2));
Uc_cur = Uc_pre * (1- ((float)T_neg / (T_1 + T_2)));
Uf_cur = Uc_cur * (1- ((float)T_2 * T_neg/(T * (T_1 + T_2))));
} else { Uc_cur = Uc_pre; Uf_cur = Uc_cur; }
// Tinh toan cho DCO
f=f_0+K_0*Uf_cur;
T=1000000000/f;
// update cac gia tri tinh toan cho lan tinh toan tiep theo
Uc_pre=Uc_cur; Uf_pre=Uf_cur;
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