Hey, I have one of them too.
I just tried to apply 9V between 2 terminals while keeping the 3rd terminal open. The motor rotated few degrees. By choosing seperate pairs of wire serially and applyingvoltage across them you can rotate the motor. Alternatively, you can use a microcontroller, and an optocoupler to drive the motor.
I'm almost certain that your disk has a brushless DC (BLDC) motor. Since it has only 3 leads, I think, it's a sensorless BLDC. I've never worked with such motors, but if you google "BLDC" or "sensorless BLDC", you'll get a tonn of app notes with schematics, algorithms and code.
I used this code for my AT89S52 microcontroller. Please remember to use an optocoupler to isolate the microcontroller pins from any direct electric contact with the motors, and also use a current amplifier to avoid toasting your optocoupler.
#include "reg52x2.h"
/*
* FUNCTION_PURPOSE: This file set up timer 0 in mode 2
Three pieces of half bridges if the spindle motor has no center tap (3 terminals). If the motor has a center tap (four terminals), you don't need halfbridges, just connect center tap to V+, and use regular PNP transistor between ground and the other terminals.
A circuit with 3 logic outputs, where one input at time is active. A ring counter combined by a VCO should make it works. Three outputs shall be connected to each transistor or half bridge.
If this sounds interesting, and if you want to build this thing (diy project) I can always provide a relatively simple schematic. You should be able to make it work with only a few transistors and some logic circuits. Remember to get yourself a 5 volt supply if working with TTL circuits. Otherwise use cmos in 4xxx series.
I have a schematic drive motor hdd. I take motor from HDD hard disk of seagate. It have 3 wire.
But i don't run.
You help me about it.
thank you very much
have a nice day https://obrazki.elektroda.pl/5_1265267124.jpg
I am currently working on the propeller clock with my group for which we needed to run a hard disk motor.
All you have to do is use an HBridge IC L239.
1) Generate a 3 phase step signal using 8052 Microcontroller. Keep the frequency small at first and then gradually increase.
2) Connect the output of the MC to the inputs of L239, which has 4 inputs.
3)Connect the three outputs of L239 to the HD Motor.
4)HBridge IC is used to provide the necessary current to the motor.