That is correct Roger. The Tropicas have 2 ea. Prestolite 6.7" series
motors with a Curtis controller for each one. Cog belt drive to each rear
wheel and no series/parallel switching. The only switching was for
electrical reverse and then the original design only used the left motor
when in reverse. It is very hard on the motor in that manner. It seemed
silly when I first discovered it since the only thing they really saved was
part of the cost of the reversing contactor and there is plenty of room for
the reversing contactor.
As far as I can determine the only ones that used a single Curtis were the
three test mules in Alameda that were assembled out of parts after the first
or second bankruptcy sale and I know for sure that at least one of them had
the second Curtis added to it.
respectfully,
John
----- Original Message -----
From: "Roger Stockton" <[email protected]>
To: "Electric Vehicle Discussion List" <[email protected]>
Sent: Thursday, February 07, 2013 5:50 PM
Subject: Re: [EVDL] Series and parallel switching
Peter Crisitello wrote:
Sounds to me like what was actually used on the 1995 Tropica?
I don't know if the drivetrain configurations varied for different years,
but my understanding is that the Tropica used a pair of smaller ADC
series-DC motors, each independently driving a rear wheel through a fixed
reduction belt drive, and each powered via its own Curtis controller.
It is possible that both were connected to a single Curtis, but in either
case there was no series-parallel switching, and series motors don't
behave quite the same as PMDC.
Cheers,
Roger.
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