[EVDL] MM675 conversion

Why not just get the 24V CMM1000?

-Phil
----- Original Message -----
From: "Peter Eckhoff" <[email protected]>
To: <[email protected]>
Sent: Saturday, October 13, 2007 7:41 AM
Subject: [EVDL] MM675 conversion


> Black and Decker makes a corded electric mower with a part number of
> MM675.
>
> Has anyone converted one of these to battery only?
>
> If so, how did you do it?
>
> Peter
>
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I "saved" two B&D's from the dump. Thought that they might make a good =

EV project.

Peter

(=A4Phil=A4) wrote:
> Why not just get the 24V CMM1000?
>
> -Phil
> ----- Original Message ----- =

> From: "Peter Eckhoff" <[email protected]>
> To: <[email protected]>
> Sent: Saturday, October 13, 2007 7:41 AM
> Subject: [EVDL] MM675 conversion
>
>
> =

>> Black and Decker makes a corded electric mower with a part number of =

>> MM675. =

>>
>> Has anyone converted one of these to battery only?
>>
>> If so, how did you do it?
>>
>> Peter
>>
>> _______________________________________________
>> For subscription options, see
>> http://lists.sjsu.edu/mailman/listinfo/ev
>>
>> =

>
> _______________________________________________
> For subscription options, see
> http://lists.sjsu.edu/mailman/listinfo/ev
>
>
> =



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Ahh, That explains it! I would assume the only way to do it would be with =

a boost converter or inverter, as the motors are probably designed for 120V.

I guess an on-the-cheap way would be to get a cheap chinese inverter of the =

requisite capacity and add enough battery to handle your lawn. It might be =

a better idea to make a quick-change battery system so you can stick with =

lighter amounts of lead, and then swap them out to get the "range" you need.

If the motor is DC capable (series-wound or PM with a recitifer), then go =

into the inverter and tap out the DC before it gets to the switching stage =

(look for a large capacitor(s)). This will likely improve efficiency. I'v=
e =

also been successful at adding a pot to the voltage feedback divider circui=
t =

to adjust the DC output voltage. You might be able to dial it down for mor=
e =

range with this trick.

-Phil
----- Original Message ----- =

From: "Peter Eckhoff" <[email protected]>
To: "Electric Vehicle Discussion List" <[email protected]>
Sent: Saturday, October 13, 2007 9:34 AM
Subject: Re: [EVDL] MM675 conversion


I "saved" two B&D's from the dump. Thought that they might make a good
EV project.

Peter

(=A4Phil=A4) wrote:
> Why not just get the 24V CMM1000?
>
> -Phil
> ----- Original Message ----- =

> From: "Peter Eckhoff" <[email protected]>
> To: <[email protected]>
> Sent: Saturday, October 13, 2007 7:41 AM
> Subject: [EVDL] MM675 conversion
>
>
>
>> Black and Decker makes a corded electric mower with a part number of
>> MM675.
>>
>> Has anyone converted one of these to battery only?
>>
>> If so, how did you do it?
>>
>> Peter
>>
>> _______________________________________________
>> For subscription options, see
>> http://lists.sjsu.edu/mailman/listinfo/ev
>>
>>
>
> _______________________________________________
> For subscription options, see
> http://lists.sjsu.edu/mailman/listinfo/ev
>
>
>


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Peter,

If the AC 120 volt motor can run on DC, four of the DeWalt packs in series =
would be in that range. However, at $100 plus each, and a $40 plus charger=
, mounts, fuse, switch, a little expensive and you may have to stop and rec=
harge in the middle of a large yard.

Alan =


-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behal=
f Of Peter Eckhoff
Sent: Friday, October 12, 2007 4:35 PM
To: Electric Vehicle Discussion List
Subject: Re: [EVDL] MM675 conversion

I "saved" two B&D's from the dump. Thought that they might make a good =

EV project.

Peter

(=A4Phil=A4) wrote:
> Why not just get the 24V CMM1000?
>
> -Phil
> ----- Original Message ----- =

> From: "Peter Eckhoff" <[email protected]>
> To: <[email protected]>
> Sent: Saturday, October 13, 2007 7:41 AM
> Subject: [EVDL] MM675 conversion
>
>
> =

>> Black and Decker makes a corded electric mower with a part number of =

>> MM675. =

>>
>> Has anyone converted one of these to battery only?
>>
>> If so, how did you do it?
>>
>> Peter
>>
>> _______________________________________________
>> For subscription options, see
>> http://lists.sjsu.edu/mailman/listinfo/ev
>>
>> =

>
> _______________________________________________
> For subscription options, see
> http://lists.sjsu.edu/mailman/listinfo/ev
>
>
> =



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_______________________________________________
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At one time I actually considered buying 100 1.2v, 2.5AH AA NiMH cells to
power my B&D corded mower.

David Roden - Akron, Ohio, USA
EVDL Administrator

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Are the motors still good? I've got one that burned out after about three
years.
I don't think it helped that my wife liked using the 100ft long 14ga
extendsion cord.

Anyway, I don't think there are any advantages to converting the corded
electric over converting an old gas mower. The plastic deck might even be
a disadvantage.

> I "saved" two B&D's from the dump. Thought that they might make a good
> EV project.
>
> Peter
>
> (=A4Phil=A4) wrote:
>> Why not just get the 24V CMM1000?
>>
>> -Phil
>> ----- Original Message -----
>> From: "Peter Eckhoff" <[email protected]>
>> To: <[email protected]>
>> Sent: Saturday, October 13, 2007 7:41 AM
>> Subject: [EVDL] MM675 conversion
>>
>>
>>
>>> Black and Decker makes a corded electric mower with a part number of
>>> MM675.
>>>
>>> Has anyone converted one of these to battery only?
>>>
>>> If so, how did you do it?
>>>
>>> Peter
>>>
>>> _______________________________________________
>>> For subscription options, see
>>> http://lists.sjsu.edu/mailman/listinfo/ev
>>>
>>>
>>
>> _______________________________________________
>> For subscription options, see
>> http://lists.sjsu.edu/mailman/listinfo/ev
>>
>>
>>
>
>
> _______________________________________________
> For subscription options, see
> http://lists.sjsu.edu/mailman/listinfo/ev
>


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