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Old 05-20-12, 05:22 PM   #11
dh1
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Quote:
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If I had to choose one that is also the motor I'd choose. Here is the manufacturer's site and the ME1004 description:

ME1004 Brush-Type DC Motor
Ditto on this motor, it seems to be the one to go for if you don't already have one.
Lots of people have used the ME1004 and it's predecessors ME0708 and the ETEK motor, all basically the same design.

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Old 05-20-12, 07:23 PM   #12
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So any recommendations for batteries for use with this motor? Should I just use 4 regular car batteries to get 48v? Would marine deep cycle batteries be any better or last longer? I'd like to be able to mow for at least 1 hour per charge. 2 hours would be even nicer. I have a lot of grass to mow.
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Old 05-20-12, 09:08 PM   #13
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If you are using lead-acid Golf Cart batteries will handle the cycling the best. Marine deep-cycles are a small step up from regular car batteries and won't last too long when deeply cycled.
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Old 05-21-12, 12:05 PM   #14
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1 hour of mowing is no small task. With my 48V mower I have four 12V 150Ah (which is very high for a 12V) lead acid batteries. They probably provide me with 30-40 minutes of run time to 50% dod (depth of discharge). With lead you don't really want to take them down much farther than that because doing so reduces the number of cycles you get out of them. So, in order to get 1hr of run time I'd probably recommend going with eight 6V batteries. You can get 6V batteries rated for 225Ah and that would probably get you what you want.
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Old 05-30-12, 01:15 AM   #15
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Is this contactor a good buy?

Electric Motorsport EV Parts

Or can I save some money and get something just as good elsewhere?
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Old 05-30-12, 01:24 AM   #16
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What would I need in order to convert 110v AC into 48v DC for use in this project? Still toying with the idea of a having a diesel generator power the electric motor in the interests of being able to mow the entire yard in one go and in having a backup generator on hand for other uses.
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Old 05-30-12, 08:55 AM   #17
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That contactor will work. If you want to save some money you might check ebay for contactors from a forklift. That is what I am using in my mower. Just pay attention to the coil voltage. I am using a contactor with a 12V coil, but its no an issue since I have a charger for each battery. If you had a 48V charger that coil would unbalance the pack over time.

I think you should either go battery or diesel. Doing a combination is not only much more expensive, but also much more complex and less efficient.
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Old 05-30-12, 11:04 AM   #18
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Yeah, I'm thinking the diesel generator would be instead of doing batteries, not both. The diesel generator would have 3 benefits for me:

1) Able to mow our entire spread in 1 go.
2) Not have a bunch of money/energy tied up in batteries on the mower.
3) I'd have a generator to run other stuff, when needed.
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Old 05-31-12, 03:51 PM   #19
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Does anyone know of a good 48v DC power supply capable of 200amps?
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Old 06-01-12, 07:50 AM   #20
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Quote:
Originally Posted by mhixson View Post
Does anyone know of a good 48v DC power supply capable of 200amps?
A bank of deep cycle batteries?

If you are asking about converting AC power to 48v DC then you are not going to find much at 200 amps! starting out at 220v AC you would need 8 gauge wire and a 50 amp breaker on the AC side.

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