Date:         Tue, 28 Sep 2004 06:53:16 -0400
Reply-To:     Dennis Haynes <dhaynes@OPTONLINE.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Dennis Haynes <dhaynes@OPTONLINE.NET>
Subject:      Re: NVC - how do I control a battery powered DC motor.
Comments: To: John Rodgers <inua@CHARTER.NET>
In-Reply-To:  <4158E7E2.2080800@charter.net>
Content-type: text/plain; charset=us-ascii

What type of DC motor? Is it permanent magnet, series field, shunt
filed, combination? What. 1 HP, = 746 watts. Assuming 80%, you really
need 932.5. At 12 volts, you need almost 78 amps to drive this thing.
This means you need a 400 amp/hour battery to run this thing for any
length of time. What are you operating with it? You will need a motor
controller designed for the type of motor to vary the speed.

Dennis


-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf
Of John Rodgers
Sent: Tuesday, September 28, 2004 12:26 AM
To: vanagon@GERRY.VANAGON.COM
Subject: NVC - how do I control a battery powered DC motor.

I have a 1 HP DC motor that I want to run on a car battery as opposed to
using some sort of converter from AC to DC.

Anyone have any ideas as to how I might do this and control the motor
speed?

Thanks,

John Rodgers
88 GL Driver