Need some Brushed motor advice...

3 replies [Last post]
TheBoffin
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Joined: 06/29/2012
Points: 10

So i have a Schwinn S500 that I am going to be upgrading (ordering parts by the end of the week) and I just wanted someone else's opinion. I will be running a Kelly controller (80A continuous 200A peak) and a 24V setup (for now with a 9S or 10S Lipo upgrade in the near future) should I hold out on getting a new motor until I go LiPo? Also, I am looking at either the 24V 750W or the 36V 1000W motor to upgrade to. I mainly want some low end grunt, but a top speed around 20MPH would be nice too. Do I get the 24V and overvolt it or go with the 36V at rated voltage? I know that the higher watts will give more low end gruntability, but overvolting the 24V will give me some more RPM's. The 24V motor is also only rated at 28A while the 36V is rated at 40A. Will I be super dissapointed in the 36V at 24V even with the extra amps? 24V at 80A continuous would be 1920Watts, not sure if the 24V motor would like being that overpowered. Just looking for some input. Thanks!

Also, Just ordered Kelly's KDS36200,200A,24V-36V, Mini Brushed Controller with Waterproofing and USB connection cable. I also opted for their Thumb Throttle.

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danpatgal
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Joined: 07/20/2012
Points: 7
Re: Need some Brushed motor advice...

Wow, it seems like your controller is over the top and you could kill your batteries to do it, and if not you could burn up your motor, especially the 24v rated motor. I use a 25amp capable controller with a 48v pack, and get about 1000w out of it max which gets me going over 35mph on the flats without pedaling (FUN!). That's on an e-bicycle, not the scooter.

But, I'd go with the larger motor if I were you. If your pack is initially only 24v, you'll still have room to grow if you get the higher voltage pack later on.

TheBoffin
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Joined: 06/29/2012
Points: 10
Re: Need some Brushed motor advice...

I purchased the controller because it is fully programable. I do not intend to run the full 80A constantly to it, mosreso closer to 40A @ 24V (being 960W constant with bursts to 100A. My main concern is what the 36V motor would be like at only 24V, as it would never get all the way up to the RPM range it would want to be at...

danpatgal
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Joined: 07/20/2012
Points: 7
Re: Need some Brushed motor advice...

I ran my 72v capable motor at 24 volts ... it was slower, but "liked" it fine. I think you can get some good specifications from the Grin Technologies' website to see the relationship between volts, amps, power, and speed on various types of motors/wheels. It's http://www.ebikes.ca/simulator/.

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