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Discussion Starter #1
Re: [EVDL] Running a forklift motor at higher voltage?

Most DC series wound motors are essentially forklift motors being run at a much higher voltage. Usually as the voltage goes up the timing on the motor is advanced to help prevent arcing, but this is not always the necessary. Forklift motors are designed to be put under a heavy load and run all day long. In warehouses with 3 shifts, they can run around the clock. Most EVs do not even have enough battery power to run for a full hour without a recharge, so the motors being used in forklifts in the warehouse environment are being stressed much more than the ones in EVs. You could even think of your EV as the motors equivilant of retiring to Florida :)

damon


> Date: Thu, 6 Sep 2007 17:50:47 -0500
> From: [email protected]
> To: [email protected]
> Subject: [EVDL] Running a forklift motor at higher voltage?
>
> Hi,
>
> I've seen some posts regarding the use of forklift motors in cheap EV projects.
>
> Is it safe to just run forklift motors at 72V and much higher RPMs than normal?
>
> Thanks,
> Morgan LaMoore
>
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Discussion Starter #2
Re: [EVDL] Running a forklift motor at higher voltage?

In a message dated 9/6/2007 3:51:50 PM US Mountain Standard Time,
[email protected] writes:
> EVDL] Running a forklift motor at higher voltage?
> Date:9/6/2007 3:51:50 PM US Mountain Standard Time
> From:[email protected]
> Reply-to:[email protected]
> To:[email protected]
> Received from Internet:
>
>
>
> Hi,
>
> I've seen some posts regarding the use of forklift motors in cheap EV
> projects.
>
> Is it safe to just run forklift motors at 72V and much higher RPMs than
> normal?
>
> Thanks,
> Morgan LaMoore
>
I have a 24/36 volt motor with my controller set at max 260 volts in my
S10.Its has a 13in.dia.motor.I have been running it at 5450 rpm at the end of the
qt.mile(106mph),but I would not run it for a long time at these rpms especially
with lots of current. I have spent a fair amount of time and money however to
get it to that point. A junkyard motor would at least need rebuilding but
should go to 72 volts with ease. D Berube
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Discussion Starter #3
Re: [EVDL] Running a forklift motor at higher voltage?

--- damon henry <[email protected]> wrote:

> Most DC series wound motors are essentially forklift
> motors being run at a much higher voltage. Usually
> as the voltage goes up the timing on the motor is
> advanced to help prevent arcing, but this is not
> always the necessary. Forklift motors are designed
> to be put under a heavy load and run all day long.
> In warehouses with 3 shifts, they can run around the
> clock. Most EVs do not even have enough battery
> power to run for a full hour without a recharge, so
> the motors being used in forklifts in the warehouse
> environment are being stressed much more than the
> ones in EVs. You could even think of your EV as the
> motors equivilant of retiring to Florida :)

Hey (again) Damon, all

In general a fairly correct statement but...
EVen forklift drive motors are rated for a 1 hour duty
cycle. Low use forklift owners rarely go though
motors but the guys that chug all day are the same
ones I get most my business from, lol. Determining
ones own duty cycle involves a great number of
factors. I'll write more when I have more time and
something in the gut 8^)

Cya
Jim Husted
Hi-Torque Electric




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