aabbddlah

Oct 27, 2009, 03:42 PM

Hello everyone

i v just joined the forum and i would like u to give me some sort of help in my induction motor project

i am using matlab to carry out the value for torque and then plot the torque Vs speed graph using matlab

so torque should be calculated for different speeds and slips

(Not only different values of speed!)

So

given the following parameters

R2=.8ohm

Rt=1.2ohm

Lt=2.2ohm

L2=3 ohm

v=225v

s = (ws-wr) / ws , where ws=synchronous speed and wr=rotor speed

i2= as in attachment

torque=(3./wr)*(I2^2)*(R2/s)*(1-s)

Also current cannot be one constant value

It should be calculated accordingly to slip values, so for each slip value we should have a value for current

To sum up , I think that we should use for loop to carry out values of slip ,corresponding speed ,and corresponding current on a range of values to create the proper plot

If the code is correct we must end up with the graph shown in the attachment

I will be thankful if u would help me

Many thanks

i v just joined the forum and i would like u to give me some sort of help in my induction motor project

i am using matlab to carry out the value for torque and then plot the torque Vs speed graph using matlab

so torque should be calculated for different speeds and slips

(Not only different values of speed!)

So

given the following parameters

R2=.8ohm

Rt=1.2ohm

Lt=2.2ohm

L2=3 ohm

v=225v

s = (ws-wr) / ws , where ws=synchronous speed and wr=rotor speed

i2= as in attachment

torque=(3./wr)*(I2^2)*(R2/s)*(1-s)

Also current cannot be one constant value

It should be calculated accordingly to slip values, so for each slip value we should have a value for current

To sum up , I think that we should use for loop to carry out values of slip ,corresponding speed ,and corresponding current on a range of values to create the proper plot

If the code is correct we must end up with the graph shown in the attachment

I will be thankful if u would help me

Many thanks