Pope Electric Mower Conversion

[alphabetsoup74]

Hi All,

This is my first post on the forums for a while so forgive me if this post is in the wrong place.

I have recently bought a pope centre court mower that was built in 1949. It is of excellent quality and mows the lawns perfectly!
However I am hoping to do a cordless swap on it.

My plan is as follows;

Motor + Controller- 48V 2000W BLDC Motorhttps://tinyurl.com/26mzkcpu
Battery- Use Existing Batteries I have for my EGO battery mower (labelled as 56V but I believe they are 14S so nominal voltage of 52V)
Battery Adapter- https://www.amazon.com/BATTERY-ADAPTER-LITHIUM-CONNECTOR-ONEWHEEL/dp/B08513XXWT
Plus appropriate fuses etc.

I think this should be a fairly straightforward conversion, but I am after some advice.

1. The old motor is 1/3HP (around 250W) - Will the new motor be too powerful? Or does the motor only draw the power it needs based on the friction of the load?
2. The hardest part I can see is adapting the belt drive. I am happy to buy a new pulley to suit the new motor, but the shaft doesnt look like a standard shaft? Is there maybe a better quality motor someone can suggest, or a way to adapt a 50mm V belt pulley onto this?

I am familiar with ebike conversions so the electrical side shouldnt be a problem.

 

[amberwolf]

1. The old motor is 1/3HP (around 250W) - Will the new motor be too powerful? Or does the motor only draw the power it needs based on the friction of the load?

The latter.

Keep in mind that at startup the motor may still draw a pretty high current, especially if you're in uncut grass/etc when doing so. This means the battery has to be able to supply that or shutdown to protect itself.

2. The hardest part I can see is adapting the belt drive. I am happy to buy a new pulley to suit the new motor, but the shaft doesnt look like a standard shaft? Is there maybe a better quality motor someone can suggest, or a way to adapt a 50mm V belt pulley onto this?
<snip>
Motor + Controller- 48V 2000W BLDC Motor https://tinyurl.com/26mzkcpu

I can't open your redirect link, so if you can post the direct actual URL for the site your motor/etc come from, I can look at that and see if it has useful info to figure things out.

 

[Jrbe]

The shaft is going away with that old motor no? I'd guess that's a 15mm shaft with that plastic measuring thing in the picture.

Have you run it with the current motor to see how it performs? If you have something like a kill-a-watt meter it could get you ballpark numbers of spinning and cutting wattage.
8x the original motor (250 vs 2000 watts) is a LOT. Can you find a 500 watt (or closer to the original power if is capable) motor that's lighter and cheaper?
You will likely be out of the 2kw motor's efficiency for most / all of the mow.