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Discussion Starter · #1 ·
I was wondering if anyone had any suggestions as to what might be wrong
with my Warp 9.

Ive had it running freestanding in both directions off a 12v battery no
problem.

Today we've tried running it with the transmission connected up and the
driving wheels off the ground. Initially it went in one directions but
we were getting some vibration from the transmission which we think was
caused by the driveshafts to the wheels catching on the subframe due to
the weight of the wheel.

When we tried it in reverse, nothing. We've now disconnected all the
transmission so the motor is freestanding again but we cant get the
motor to move in either direction. Ive checked with the voltmeter that
theres power there but the motor makes no attempt to move.

Is it possible something has broken inside the Warp 9?

Regards
Andrew

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Discussion Starter · #2 ·
How many amps is it drawing? A clamp on ammeter would tell you. I helped a
friend and a motor power post had cracked causing a similar situation.

If you put the car in gear, can you push the car and spin the motor? That would
prove it is mechanically free.

If you are drawing a low current current, it could be you simply need more volts
and amps. My motor would spin up freely by itself on 12 Volts, but would not
move the car on level ground.




________________________________
From: Andrew Wood <[email protected]>
To: [email protected]
Sent: Sun, September 12, 2010 9:16:49 AM
Subject: [EVDL] Warp 9 failure

I was wondering if anyone had any suggestions as to what might be wrong
with my Warp 9.

Ive had it running freestanding in both directions off a 12v battery no
problem.

Today we've tried running it with the transmission connected up and the
driving wheels off the ground. Initially it went in one directions but
we were getting some vibration from the transmission which we think was
caused by the driveshafts to the wheels catching on the subframe due to
the weight of the wheel.

When we tried it in reverse, nothing. We've now disconnected all the
transmission so the motor is freestanding again but we cant get the
motor to move in either direction. Ive checked with the voltmeter that
theres power there but the motor makes no attempt to move.

Is it possible something has broken inside the Warp 9?

Regards
Andrew

_______________________________________________
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Discussion Starter · #3 ·
First, put the transmission in neutral or with no transmission, then try
running the motor on 12 volts, the ampere will surge to about 30 to 50 amps
and then come back down.

I built a little test set that has a standard auto 12 volt meter and amp
meter that is mounted in a plastic box with leads coming out of it. I
always bench test any motor motor before I install it.

If the motor does not rotate, then remove the power leads, but leave the
motor jumper in place and take a resistance reading. If there is no
continuity, then remove the motor jumper and read between each motor
terminal. If there is no continuity on one set of the terminals, then pull
the brush screen and check the brush leads going to the commentator and/or
field wires. You then can determine where the problem is.

When I received a new motor, I do these checks plus check the motor
terminals to the motor case. I record the resistance and 10 years later, I
will perform these test again plus the motor maintenance. Lets say the
motor terminal to ground reads over 20 meg ohms when new and when I reads
about 50 K ohms, it is time to clean the motor because of the brush dust
tracking.

If you had it connected to the load as you said, then the problem could be
as David said. The ampere on 12 volt under this type of load could be 600 to
800 amperes. Applying 180 volts to a Warp 9 connected to a transmission in
neutral is about 50 motor ampere for me, so at 12 volts this would be about
750 amperes.

Roland






----- Original Message -----
From: "David Dymaxion" <[email protected]>
To: "Electric Vehicle Discussion List" <[email protected]>
Sent: Sunday, September 12, 2010 8:50 AM
Subject: Re: [EVDL] Warp 9 failure


> How many amps is it drawing? A clamp on ammeter would tell you. I helped a
> friend and a motor power post had cracked causing a similar situation.
>
> If you put the car in gear, can you push the car and spin the motor? That
> would
> prove it is mechanically free.
>
> If you are drawing a low current current, it could be you simply need more
> volts
> and amps. My motor would spin up freely by itself on 12 Volts, but would
> not
> move the car on level ground.
>
>
>
>
> ________________________________
> From: Andrew Wood <[email protected]>
> To: [email protected]
> Sent: Sun, September 12, 2010 9:16:49 AM
> Subject: [EVDL] Warp 9 failure
>
> I was wondering if anyone had any suggestions as to what might be wrong
> with my Warp 9.
>
> Ive had it running freestanding in both directions off a 12v battery no
> problem.
>
> Today we've tried running it with the transmission connected up and the
> driving wheels off the ground. Initially it went in one directions but
> we were getting some vibration from the transmission which we think was
> caused by the driveshafts to the wheels catching on the subframe due to
> the weight of the wheel.
>
> When we tried it in reverse, nothing. We've now disconnected all the
> transmission so the motor is freestanding again but we cant get the
> motor to move in either direction. Ive checked with the voltmeter that
> theres power there but the motor makes no attempt to move.
>
> Is it possible something has broken inside the Warp 9?
>
> Regards
> Andrew
>
> _______________________________________________
> | REPLYING: address your message to [email protected] only.
> | Multiple-address or CCed messages may be rejected.
> | UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
> | OTHER HELP: http://evdl.org/help/
> | OPTIONS: http://lists.sjsu.edu/mailman/listinfo/ev
>
>
>
>
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> URL:
> http://lists.sjsu.edu/mailman/private/ev/attachments/20100912/aeebc743/attachment.html
> _______________________________________________
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> | Multiple-address or CCed messages may be rejected.
> | UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
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>

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