Novak
10-03-2011, 02:54 PM
#1
Novak
So recently I bought a Novak Kinetic and ballistic motor. This weekend, I went to run the car and the capacitor blew as soon as I pressed the accelerator. I emailed [email protected] but I haven't heard back from Novak yet, but this afternoon I took the ESC and motor off the car, and I happened to notice something odd about the motor. It didn't seem to have any magnetic resistance when turning the rotor. Odd I thought, so I took the front piece off and saw that the 4 magnets had broken off the rotor, 1 of the magnets is actually broken into 2 or 3 pieces inside the stator. What a nightmare this is. I didn't overheat the motor or ESC, the trans-cap module was installed incorrectly by the factory, but it hasn't been wrecked or dropped. What the heck is going on? I know I should have paid more attention but the last time I ran it, I thought the battery just went low. I just figured the low voltage cut-off had come and I picked it up, turned it off, and put it away. Now I'm thinking the rotor broke and that added to the capacitors failure. I'm using a 7.4v LiPo. I'm running stock timing and I keep close eyes on the motor temps, they were never outside of the safe ranges. Please opinions. It seems like I'm going to have to make a warranty claim.
Edit: Well when I first looked at it, it looked like it was 4 magnets. When I looked closer, it turns out its just one continuous magnet broken into about 4 pieces.
Edit: Well when I first looked at it, it looked like it was 4 magnets. When I looked closer, it turns out its just one continuous magnet broken into about 4 pieces.
Last edited by pensfan2987; 10-03-2011 at 03:14 PM.
10-03-2011, 03:26 PM
#2
Were you revving it up on the work bench or doing crazy donuts or something? I know you can explode rotors by free revving them without a load. If not, I'd say rotor failure. Novak real good about honoring their stuff.
10-03-2011, 03:30 PM
#3
No, I didn't free rev the motor or anything, it has just been normal driving, practice laps on the track. At this point, I can see damage inside the stator core and the windings. The whole motor will have to be replaced along with the trans-cap.
Last edited by pensfan2987; 10-03-2011 at 03:33 PM. Reason: more to say
10-09-2011, 02:53 PM
#4
Pretty sure when Charlie gets back from the IIC you'll get a response.
BTW the rotor in any brand of motor has the potential to explode under no load and big rpm, I've seen it happen in TC, just rolling over in a high speed sweeper corner.
BTW the rotor in any brand of motor has the potential to explode under no load and big rpm, I've seen it happen in TC, just rolling over in a high speed sweeper corner.
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