Re: what is the max bus voltage, 300V?

[Lee Hart <leeahart@earthlink.net>]

Lee Hart wrote:
>> There are AC forklift drives that run on low voltages. For
>> example, API Elmo AB (in Sweden) makes them up to 21 HP for 24-80vdc
>> battery packs.

ethorpe@gric.com wrote:
> Yes, but how heavy and large are these motors? Size and weight are
> major concerns for on-road EVs. DC motors for reasonable conversions
> weigh 100-150 lbs and take 80-200vdc (like 8" and 9" ADC motors).
> What size are the 15HP 250vdc sepex?

It's a Westingouse combination motor-generator. It consists of a 15 HP
3-phase 240/480vac induction motor (~100 lbs) and a 240vdc separately
excited brushed DC generator (~150 lbs). Both are about 10" diameter and
the coupled pair are 28" long. (PS -- they're for sale if anyone is
interested).

> What size is an Elmo 21HP 80vdc AC forklift motor?

The specs for the TSP160/4-350 are 21.3kw for 1 hour, 140.3nm at 1450
rpm, 585mm (23") long x 350mm (13.75") diameter. They don't give the
weight but from the dimensions I'd guess about 150 lbs. Remember that
weight is a virtue in forklifts; a equivalent DC series forklift motor
would be about 200 lbs. Changing the voltage of any motor does not
change its size or weight.
-- 
Lee A. Hart                Ring the bells that still can ring
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