Flux Vector
Posted by
Arne Chr. Jorgensen
on 1999-09-25 07:11:54 UTC
Hi,
Jon Elson: You have been working ! Have you counted all your
inputs ?
You even do good on my misspelling :-)
Further, all you say is very good, but I jumped a little bit
regarding the AC drives and the flux vector control. I wanted very
much to dig into this, after I read some papers on it, when it
first was presented. A close friend of mine, made the hardware for
a pilot project, - many years ago. The thing was made as a variable
RPM motor control, but I wanted to attach an encoder and make it
into a position servo. There was several problems with the design,
mainly do to processor speed - so there was a lot of room for
improvements. This speed limit was at 400Hz for an ordinary 50Hz
motor. But there would be problems to incorporate the servo
calculations, and run the bridge at the same time. Well, enough of
that.
I meant it could function as a servo, but he disagreed, because he
meant it had to rotate in order to induce any rotor torque. That is
- to generate enough holding torque. I believed it would, - more or
less what you say.
By the way, you would need to add a fan to the motor. Why do I
write this ? ( I have forgot the question I had .. . )
Well, never mind.
About the DC tach, - I said you were smart :-) Your comment is pin
pointing my opinion about it.
The context for my own words, was how to make a digital one, and I
know that some PIC controllers seems to work, but I don't know how
good it is. A little spelling error on my side, but I liked your
answer, - sure I would like to see your graphs.
Chris: Did you really read all the digests ? If you get any
time, I sure would like to hear a little bit more about the MIT 3d
printer.
Brian: The same with the hexapod, If you have time, say
something about it.
//ARNE
Jon Elson: You have been working ! Have you counted all your
inputs ?
You even do good on my misspelling :-)
Further, all you say is very good, but I jumped a little bit
regarding the AC drives and the flux vector control. I wanted very
much to dig into this, after I read some papers on it, when it
first was presented. A close friend of mine, made the hardware for
a pilot project, - many years ago. The thing was made as a variable
RPM motor control, but I wanted to attach an encoder and make it
into a position servo. There was several problems with the design,
mainly do to processor speed - so there was a lot of room for
improvements. This speed limit was at 400Hz for an ordinary 50Hz
motor. But there would be problems to incorporate the servo
calculations, and run the bridge at the same time. Well, enough of
that.
I meant it could function as a servo, but he disagreed, because he
meant it had to rotate in order to induce any rotor torque. That is
- to generate enough holding torque. I believed it would, - more or
less what you say.
By the way, you would need to add a fan to the motor. Why do I
write this ? ( I have forgot the question I had .. . )
Well, never mind.
About the DC tach, - I said you were smart :-) Your comment is pin
pointing my opinion about it.
The context for my own words, was how to make a digital one, and I
know that some PIC controllers seems to work, but I don't know how
good it is. A little spelling error on my side, but I liked your
answer, - sure I would like to see your graphs.
Chris: Did you really read all the digests ? If you get any
time, I sure would like to hear a little bit more about the MIT 3d
printer.
Brian: The same with the hexapod, If you have time, say
something about it.
//ARNE