Heeeeeeeeeeeeeeeeeeeeeeeelp motor

[yar]

Hi'
I am YAR I want to design a circuit to control an AC motor which
contains many turns of a very thin copper wire on a plastic
cylinderical shape (the motor stator )this plastic cylinderical shape
has a hole in the center . the rotor of the motor just a small magnet
with a small shaft .
when I plug in the motor to the power source it turn left or right . I
want to control this direction( turn left or right)

NOTE;
( the motor is 3watt & 5 rpm)

this is my idea I think I want a sine or square wave generator
begining with the negative side to turn the motor into a certain
direction and another one begining with the positive side to turn the
motor in the second direction is it easy or not easy enough?


***if it not easy enough then I want to control 12vDC motor to
reduces it's speed to this range (5rpm) (any one help me to control the DC motor)


I want the simple one



thank you for all helps
any suggestion will be greatly appreciated
YAR

 

[Tim Wescott]

If your first post didn't work perhaps it was because you didn't give
enough information, and simply repeating it with a new and longer title
won't help much.

Here's some pointers:

yar wrote:

Hi'
I am YAR I want to design a circuit to control an AC motor which
contains many turns of a very thin copper wire on a plastic
cylinderical shape (the motor stator )this plastic cylinderical shape
has a hole in the center . the rotor of the motor just a small magnet
with a small shaft .

Presumably it is a brushless DC motor. Are you sure that the rotor is a
magnet? Was this motor manufactured by anybody? Do you know who? Can
you share that information? How many wires come out of the motor? What
colors are they? Do you know how they're connected internally? How do
you know it's an AC motor?

when I plug in the motor to the power source it turn left or right . I
want to control this direction( turn left or right)

Does it keep turning, or does it stop? Does it have much torque when it
does? Does it always turn the same way? Is the power source DC or AC?

NOTE;
( the motor is 3watt & 5 rpm)

How do you know? By looking at the manufacturer's nameplate which you
haven't shared with us?

this is my idea I think I want a sine or square wave generator
begining with the negative side to turn the motor into a certain
direction and another one begining with the positive side to turn the
motor in the second direction is it easy or not easy enough?

This sounds like how you might drive a brushless motor. What is "easy

enough" for you? If you already know how to drive it why are you asking us?

***if it not easy enough then I want to control 12vDC motor to
reduces it's speed to this range (5rpm) (any one help me to control the DC motor)

Define "easy enough". Define how steady a rotation rate qualifies as "5

rpm" for you -- will 500 rotations once every 100 minutes be good
enough? Making an ungeared DC motor go slowly and smoothly is hard --
will gearing it way down and turning the motor at 5000 RPM work for you?
Do you need to backdrive the motor? Does it need to run in reverse?

I want the simple one



thank you for all helps
any suggestion will be greatly appreciated
YAR

Ask (correctly) and your questions will be answered.

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com