AVR-Chat

If its mains motor is is probably better controlled by a PID algorithm and using the mains cycles to phase control the power.




----- Original Message ----
From: Zack Widup <w9sz@prairienet.org>
To: AVR-Chat@yahoogroups.com
Sent: Monday, 4 February, 2008 2:17:20 PM
Subject: Re: [AVR-Chat] Re: PWM Help


What kind of motor are you trying to control? Synchronous AC motors do 
not work by PWM. Stepper motors like the kind used in satellite dish 
feed polarotors use PWM. Other steppers require a set of phased pulses 
which vary the pulse frequency to control the speed. Regular DC motors 
can be controlled in a variety of ways.

Zack

On Mon, 4 Feb 2008, ktal3at wrote:

> I am controlling the motors by using avr micro control
>
> the way to increase or decrease the motor speed is the PWM
>
> and it is my first time to control motors
>
> so i am looking for help how to use the PWM and how can i connect the
> motors to controller
>
> i know that i must use h-bridge or relay (( i'm using h-bridge))
>
> thanks
>
>
>
>




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