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Registered Member #3925
Joined: Fri Jun 03 2011, 10:50AM
Location:
Posts: 121
hi,
i have this hdd hub motor, it has 3 pins, any idea of the pinout? its not a dc motor, cuz when i connect it to a battery directly it just jerks and then stops as i expected... i thought that if its a 3 phase motor it would need 4 pins, common and each end of the star configuration (the chassis of the motor is not another pin btw)
Registered Member #103
Joined: Thu Feb 09 2006, 08:16PM
Location: Derby, UK
Posts: 845
It'll be a three-phase motor - if it were delta wound there would be no neutral connection, and if it were star wound there would be no need to connect he star/neutral anyway as it's a balanced load (also on a simple 6 switch inverter, there's nowhere to connect the neutral anyway).
You can build a simple little inverter using 3 gate drive ICs instead of fiddling around with individual transistors.
Registered Member #2463
Joined: Wed Nov 11 2009, 03:49AM
Location:
Posts: 1546
If it is a 3 phase AC motor, you could try connecting a capacitor, (10 uFd) between any two wires. Then connect AC, from your Variac, across the free wire, and one of the two going to the capacitor.
If it rotates, then try the AC to the other leg going to the capacitor. This may reverse rotation.
Registered Member #2431
Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
Destroyer of mosfets wrote ...
I'm curious dose enyone know how to build an ESC for a brushless motor (or have a basic circuit to build off of)
stepper motor circuits are out there... and IC's too. but they can get kind of complicated for 3 phase stuff, since you need sensor feedback and or emf feedback, id reccomend getting a 10 to 20 amp ESC from a hobby place. depends your motor and on what you want to do too.
Registered Member #2431
Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
radiotech wrote ...
What do you mean by brush less motor and what is ESC ?
Electronic Speed Control, ESC.
EDIT: it should be noted that there are many types of brushless motors (i think this is what radiotech is alluding too.) Relecutance, stepper, ac phase, and so on...
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3 pin hard drive motor
