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nuckolls.bob(at)aeroelect
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 Posted: Mon May 10, 2010 4:39 pm Post subject: IVO Prop Motor Current Limiter and Electr on ic CB |
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At 05:38 PM 5/10/2010, you wrote:
| Quote: | My wires are fine... I usually upsize one gauge or so to be safe on
all my circuits.
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I was wondering about wires inside the motor . . . i.e. windings
on the armature . . .
| Quote: | Brush wear was high in the beginning till the commutator got
coated with brush material.... First set of brushes lasted about 20
hours, second set went 80 or so. It is stabilized at around 150
hours for a set now. The motor just failed at the 50 hour mark, I
sent it back and Ron (at) Ivo exchanged it for a new one, no charge,
so I am guessing they had a bad batch.
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Hmmmm . . . I presume the times quoted are FLIGHT times. I
would guess that this motor runs less than 5% of flight
time. That doesn't speak well of brush wear rates.
Event the smallest brushed PM motors we used to build
at E-M had brush lives in the hundreds of hours which
would translate to thousands of flight hours.
The next time you talk with Ron, suggest to him that I'm willing
to offer what ever might be useful from my experience-base
in this technology to improve on his product's service
life.
Bob . . .
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wschertz(at)comcast.net
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| Posted: Mon May 10, 2010 6:57 pm Post subject: IVO Prop Motor Current Limiter and Electr on ic CB |
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I may be mistaken, but I thought the Ivo prop had brushes that were rubbing
all the time the prop was turning -- I.e. they transfer power from the
stationary part of the engine to the rotating prop, which has the motor
mounted on it, (which then rotates with the prop).
Bill Schertz
KIS Cruiser #4045
N343BS
Phase I testing
--------------------------------------------------
From: "Robert L. Nuckolls, III" <nuckolls.bob(at)aeroelectric.com>
Sent: Monday, May 10, 2010 7:35 PM
To: <aeroelectric-list(at)matronics.com>
Subject: Re: RE: IVO Prop Motor Current Limiter and
Electr on ic CB
| Quote: | Hmmmm . . . I presume the times quoted are FLIGHT times. I
would guess that this motor runs less than 5% of flight
time. That doesn't speak well of brush wear rates.
Event the smallest brushed PM motors we used to build
at E-M had brush lives in the hundreds of hours which
would translate to thousands of flight hours.
The next time you talk with Ron, suggest to him that I'm willing
to offer what ever might be useful from my experience-base
in this technology to improve on his product's service
life.
Bob . . .
|
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http://www.matronics.com/Navigator?AeroElectric-List |
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