Recent content by Cdz

Control of AC machine in synchronous reference frame, the instantaneous torque is proportional to q-axis current. So we need to control q-axis current if we need to control torque. We need the machine torque to be sinusoidal. The motor is connected to lead screw, which converts the motor...

No, I haven't measured that. I did a simulation with simulink..though. I will provide a better description of the question later :)

Hello, guys. In field oriented control of ac machines, the electromagnetic torque is proportional to the q-axis current. We can control instantaneous torque by control the q-axis current. If the torque we want is a constant value,with PI controller, no problem, no steady error. But if we want to...

I read that it is a 20bit incremental encoder and it has only two wires for transmitting signals named as $$PS \enspace\overline {PS}$$ and the manual says serial signal transmission. I read on Wikipedia that both SSI and BISS have clock signal, so they are not what I am looking for. So it may...

Today I learned that I registered on PF more than one year ago!

I think Reverse Engineering is cool. I will try it and buy another encoder just in case. Wish I make it :smile: Thank you.

No it's not exactly just a learning exercise. For me, maybe it is, but for my professor it's not. It's a project and I do the basics to make sure the platform works and there will be more advanced work following. But l like your idea, keep it simple. Neat.

Thank you, man. :smile:

Thank you. I got it now. I am one year too late :smile:

Ok I know where this formula comes from mow.

I have a Panasonic servo motor( model no.MSME 102GCGM), this motor comes with an encoder installed and a drive. I am learning motor control, so i need to do the drive myself with dSPACE system and to do that I need the encoder signal as feedback, however the encoder output signal is not ABZ...

I am learning basic motor control and there is a formula list in my book. The last one is for torque calculation, can anyone point out to me where this one is from or how is it derived?

Problem solved. The problem is that the scope is running with too low a sample rate. I changed the sample rate from 0.01(default) to 0.00002 and the result is good.

I changed three phase voltage generation part to a Three Phase Sine Generator and the angle output is as I expected. So the problem lies in three phase voltage generation. But i can not figure out how that is wrong. Help!

<< Thread moved to the HH forums from the technical engineering forums, so no HH Template is shown >> The model: The goal: 1. Create a three phase voltage 2. Do a alpha-beta transformation 3. Do a Cartesian to Polar transformation 4 Check the output angle The expected result: Since the space...