Can't I run an AC motor with DC? I was hoping to avoid inverters. -----Original Message----- From: Alan Beeber To: PICLIST@MITVMA.MIT.EDU Date: Thursday, May 31, 2001 7:46 AM Subject: Re: [OT]: Battery AH question >I'll help with the AHr question, but I'll let others >establish why you need to re-think this problem. > >AHr is simply Amps (current) divided by time (one hour). >This describes the capacity of the battery. For instance, a >10 AHr battery should be able to 10 amps of current to a >load for 1 hour. You should be able to get larger currents >for shorter periods of time. > >However.... > >As the current from the battery increases, the battery >voltage goes down, potentially down to zero. This makes it >difficult to run DC-AC inverters, etc., from a small >battery, and can cause damage. A larger battery can hold the >voltage up for a longer period of time. > > >John Pearson wrote: >> >> I want to run a 850 watt AC motor for 10 seconds off 12 volt batteries. >> >> How many 12 volt batteries and what AH would they need to be. I calculate 6.5 batteries (80 volts)?, but the AH part has me puzzeled. >> >> Thanks for any help >> >> John >> >> -- >> http://www.piclist.com hint: To leave the PICList >> mailto:piclist-unsubscribe-request@mitvma.mit.edu > >-- >http://www.piclist.com hint: To leave the PICList >mailto:piclist-unsubscribe-request@mitvma.mit.edu > > -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu