Re: Will this circuit work, and how much power will I need?
From: rayjking (rayjking_at_bellsouth.net)
Date: 10/20/04
- Next message: Khalid KHALIFA: "Newbie question."
- Previous message: Sepp Spenlinhauer: "DC power to small AC motor?"
- In reply to: smpaladin: "Will this circuit work, and how much power will I need?"
- Messages sorted by: [ date ] [ thread ]
Date: Wed, 20 Oct 2004 11:20:43 -0400
You also need to add a resistor in series with the transistor base to
protect the halls and connect a clamp circuit across the motor coils to keep
the transistors from failing.
The motor rpm is limited by the rate of current build up and should have the
same rate of current decay or faster. What ever the battery voltage is the
clamp should be higher. one way is to add a clamp diode across each motor
coil with a zener diode in series with the clamp diode that is at least 30%
higher than the battery voltage. The transistor voltage will see the battery
voltage + 30% + the battery voltage.
Fets are best.
Ray
"smpaladin" <smpaladin@yahoo.com> wrote in message
news:6753235c.0410171702.de6d3c6@posting.google.com...
> This is a depiction of a circuit that I am planning to make.
> http://www.geocities.com/smpaladin/maglevcircuit.gif
>
> It is a linear motor; Whenever a magnet is passed over the hall
> sensor, it turns on the Power transistor, and therefore turns on the
> Electromagnet coil. In the picture, there are only four sets of the
> hall sensor/transistor/coil. In the real circuit, I am planning on
> having 12 sets of them.
>
> So will this circuit work properly? And how much power will I need?
> You would think that the circuit would need a lot of power, but then
> you realize that only one set of the hallsensor/transistor/coil will
> be turned on at any one time.
>
> Any advice is greatly appreciated.
- Next message: Khalid KHALIFA: "Newbie question."
- Previous message: Sepp Spenlinhauer: "DC power to small AC motor?"
- In reply to: smpaladin: "Will this circuit work, and how much power will I need?"
- Messages sorted by: [ date ] [ thread ]
Relevant Pages
|
