This means I need to choose low resistance & low inductance. am I right?Simply the resistance of each winding.
Torque is proportional to the current * number_of_turns. The lower the current the more turns you can pack in.
That means that torque is about the same for all motors with the same frame size.
The difference is the inductance which varies with (number_of_turns)^2
High resistance means you need more voltage to drive it.
High inductance means that the L/R time constant is longer so the maximum rate of change of torque is lower.
If you have a low supply voltage and you want it to go fast! But it does mean you need a high current driver.This means I need to choose low resistance & low inductance. am I right?
|Parameters||MineBea Motor||3X Motion|
|HOLDING Torque||26.5 Ncm||40 Ncm|
|Phase resistance||2.8 ohms||1.3 ohms|
|Rated Current||1.0 A||1.7A|
5-wire has its two centre-taps tied together - difficult to use it bipolar.The thing to remember is the 12V 6-wire unipolar motor can be a 24V bipolar motor, not using 2-leads. 5-wire, I can't remember.
I remember the Vax PDP-11, there was one at Marconi when I did my apprenticeship. It was in an air-conditioned room, and, as an apprentice, I probably wasn't allowed in. I do remember there being an advertisement for a Vax vacuum cleaners pinned to the wall!It was wierd, I specified a system base on the money I had available and the technology. technology wasn;t ready, but the money was. Odd place to be, We had to upgrade because of the PDP-11 going away.
I wish I had 20/20 hindsight.
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by Ikimi .O