Пікірлер

• 
  @joeturner39702 ай бұрын

  Thanks for produce a "decent" video of how this works. Everyone else seems to make it more complicated than they need to.

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  @simontrionosipahutar44382 ай бұрын

  I found the video lecture of Professor Eric Laithwaite from Imperial College (1975) on a Magnetic River is more easy to understand and fun. These 2 videos combined making more solid understanding tho. Anyway, good vid 👍.

• 
  @patrickliew27564 ай бұрын

  Can you provide us with your Excel file?

• 
  @IcRDlayout6 ай бұрын

  But charge and discharge speed according to rc>>T and rc<<T

• 
  @IcRDlayout6 ай бұрын

  from bode diagram |AV|-w (rad-sec) curive can undetstand it Vo(s)/vi(s)= A(1+Wz1)/(1+Wp1) A=r2/（r1+r2） right ? Sir 🤔

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  @IcRDlayout6 ай бұрын

  Much appreciated Sir 😊 Input pulse=5v t=0,f infinity, c short so vo=0 t infinity,f=0 ,c open so vo=5*(3.3/5.5)=3v Vo wavefrom : 0<t<T/2 The voltage charges the capacitor until it reaches 3v and tends to a steady state, and then T/2 <t<T the capacitor discharges R2. Right ? My base cincept😔🤔

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  @waterfuel8 ай бұрын

  ########Seems likely I can still use Vcc 12v and reduce with voltage divider for use with N channel Mosfet and load, as HIGH SIDE SWITCHING. My test load is a coil, which in formula does not use voltage, only current , inductance and fast time in seconds. Circuit can use 9v or less to operate with Gate drive from 12volts DC. The N type has a lower "on" ohms resistance. P type can be used with it's higher ohms, as long as the current is very low, for lower waste energy heat.>>>>>>>>!!!<<<

• 
  @rlliston16489 ай бұрын

  Very informative! Thank you! What software are you using?

• 
  @vyshnavtk4546 Жыл бұрын

  awesome!!!

• 
  @mellifluousb.45492 жыл бұрын

  Slide 4 out of 12: I think in the first equation Ha(θ+π) needs a plus instead of minus. I figured from Biot Savart law that Ha(θ) = Ha(θ+π). Now my question is why is H radial? Any help is appreciated, thank you!

• 
  @tatasylla88922 жыл бұрын

  Good job and explicstion,,, can you do please a bootstrap circuit for high/low side mosfet driver???

• 
  @dimchohvarchilkov6832 жыл бұрын

  This is a very good explanation of the sinusoidally distributed windings along with the space-vector control. Many thanks? :)

• 
  @ArielLorusso2 жыл бұрын

  15:20 what is Ns?

• 
  @ece44642 жыл бұрын

  The number of times the wire is wrapped around the stator metal core.

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  @mohammadfikrimuhili53843 жыл бұрын

  hye how to do this in matlab when the value of slip should be varied from 1.00 to 0.00 with the interval of 0.01.

• 
  @stephenschultz62663 жыл бұрын

  You vary the slip using a for loop. Here is the Matlab code: This is the Matlab code: %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % This file creates the torque speed plots for an induction motor. % The resistances are fixed. % The frequency is fixed % % Basic process: % (1) set up basic motor parameters % (2) create a range of slip % (3) For each slip computer % (3a) compute total impedance % (3b) compute different powers (electrical, mechanical, etc.) % (3c) compute torque % (4) create plots %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% ss=linspace(1e-4,.999,10000); %Motor parameters f=60; V1=460/sqrt(3); %Line-to-neutral voltage poles=6; R1=0.003; X1=0.0661; R2=0.0027; X2=X1; Xm=1.5443; loss=6579.5; fsyn=f/(poles/2); wm=fsyn*2*pi*(1-ss); %motor speed array in rad/s n=wm*60/(2*pi); %motor speed array in rpm clear I F eff T Pmd for lp=1:length(ss) s=ss(lp); fslip=s*fsyn; fm=fsyn-fslip; Z2=R2/s+j*X2; % stator impedance Z3=(1/(j*Xm)+1/Z2)^(-1); % armature + stator Z4=R1+j*X1+(1/(j*Xm)+1/Z2)^(-1);% Total impedance I1=V1/(Z4); %total current pf(lp)=cos(angle(Z4)); %system pf Vx=V1*Z3/(Z4); %rotor voltage I2=Vx/Z2; %rotor current Ix=Vx/(j*Xm); %magnetizing current Pg=3*abs(I1)^2*real(Z3); %Total electrical power RCL=3*abs(I2)^2*R2; %rotor heating loss SCL=3*abs(I1)^2*R1; %stator heatign loss Pconv=3*abs(I2)^2*R2*(1-s)/s; %total meachnical loss (power done + mechanical loss) Pmd(lp)=Pconv-loss; %mechanical work supplied by motor T(lp)=Pconv/(2*pi*fm); %torque Pin=real(3*V1*I1); eff(lp)=Pmd(lp)/Pin; I(lp)=abs(I1); F(lp)=fm; end figure(2) [mx,lp1]=max(eff); nFL=round(n(lp1)); [T_max, ind_max]=max(T) plot(n,T) ylabel('torque (Nm)') xlabel('motor speed (rpm)') xlim([0 1250]) grid figure(1) subplot(3,1,1) plot(n,Pmd/746) ylabel('Mech. Power (HP)') grid subplot(3,1,2) plot(n,eff*100) ylim([0 100]) ylabel('eff (%)') grid subplot(3,1,3) plot(n,I) ylabel('I (A)') xlabel('motor speed (rpm)') grid

• 
  @legendarydolor82383 жыл бұрын

  Can you please Help am trying to draw the same curve but in a different way trying to use the torque equation with everything referred to the stator I wrote the equation but I keep getting matrix dimension error

• 
  @juhangkim83543 жыл бұрын

  I think the video is blurry. Is there any way you can upload 720p video?

• 
  @catherinetankahling32343 жыл бұрын

  can share the coding here ?

• 
  @ece44643 жыл бұрын

  This is the Matlab code: %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % This file creates the torque speed plots for an induction motor. % The resistances are fixed. % The frequency is fixed % % Basic process: % (1) set up basic motor parameters % (2) create a range of slip % (3) For each slip computer % (3a) compute total impedance % (3b) compute different powers (electrical, mechanical, etc.) % (3c) compute torque % (4) create plots %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% ss=linspace(1e-4,.999,10000); %Motor parameters f=60; V1=460/sqrt(3); %Line-to-neutral voltage poles=6; R1=0.003; X1=0.0661; R2=0.0027; X2=X1; Xm=1.5443; loss=6579.5; fsyn=f/(poles/2); wm=fsyn*2*pi*(1-ss); %motor speed array in rad/s n=wm*60/(2*pi); %motor speed array in rpm clear I F eff T Pmd for lp=1:length(ss) s=ss(lp); fslip=s*fsyn; fm=fsyn-fslip; Z2=R2/s+j*X2; % stator impedance Z3=(1/(j*Xm)+1/Z2)^(-1); % armature + stator Z4=R1+j*X1+(1/(j*Xm)+1/Z2)^(-1);% Total impedance I1=V1/(Z4); %total current pf(lp)=cos(angle(Z4)); %system pf Vx=V1*Z3/(Z4); %rotor voltage I2=Vx/Z2; %rotor current Ix=Vx/(j*Xm); %magnetizing current Pg=3*abs(I1)^2*real(Z3); %Total electrical power RCL=3*abs(I2)^2*R2; %rotor heating loss SCL=3*abs(I1)^2*R1; %stator heatign loss Pconv=3*abs(I2)^2*R2*(1-s)/s; %total meachnical loss (power done + mechanical loss) Pmd(lp)=Pconv-loss; %mechanical work supplied by motor T(lp)=Pconv/(2*pi*fm); %torque Pin=real(3*V1*I1); eff(lp)=Pmd(lp)/Pin; I(lp)=abs(I1); F(lp)=fm; end figure(2) [mx,lp1]=max(eff); nFL=round(n(lp1)); [T_max, ind_max]=max(T) plot(n,T) ylabel('torque (Nm)') xlabel('motor speed (rpm)') xlim([0 1250]) grid figure(1) subplot(3,1,1) plot(n,Pmd/746) ylabel('Mech. Power (HP)') grid subplot(3,1,2) plot(n,eff*100) ylim([0 100]) ylabel('eff (%)') grid subplot(3,1,3) plot(n,I) ylabel('I (A)') xlabel('motor speed (rpm)') grid

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  @user-hq4ts2fs8m4 жыл бұрын

  how to draw for a 4 pole? 50hz