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Electric EZGO Electric EZ GO Marathon, Medalist, TXT and RXV. |
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03-09-2016, 06:47 PM | #21 |
Gone Wild
Join Date: Jul 2010
Location: Peachtree City, Ga.
Posts: 2,759
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Re: How hot should a motor get?
120°c=248°f
150°c=302°f |
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03-09-2016, 07:47 PM | #22 | |
Techno-Nerd
Join Date: Jun 2011
Location: West Virginia
Posts: 19,654
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Re: How hot should a motor get?
Quote:
The numbers I gave were for measuring the temperature at the case. If the Temperature of a RXV motor is being sensed within the windings themselves, and it has Class-H insulation, the max is 180°C (356°F) |
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03-09-2016, 10:39 PM | #23 |
Over This Interview Is...
Join Date: Jun 2012
Location: AZ
Posts: 17,449
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Re: How hot should a motor get?
Inside the windings. And its a PITA too, when the sensor fails, the sensor cant be changed.
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03-09-2016, 11:08 PM | #24 |
Gone Wild
Join Date: Sep 2015
Posts: 572
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Re: How hot should a motor get?
I don't know much about the temp a motor can take. But I always heard "you can just keep your hand on 140F". I have verified this testing with several people. I don't know any horse shoe handlers.
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03-10-2016, 01:51 AM | #25 |
Voltaholic
Join Date: Dec 2013
Location: Close to Navasota Texas
Posts: 934
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Re: How hot should a motor get?
The case (stator) temperature of the motor will never coincide with the rotor (armature), commutator or brush temperature. For most of us, we will never be able to accurately measure anything but the case temperature. Its just not practical for us to measure temperature on a rotating part, such as a commutator or rotor. Even though the brushes are stationary their carbon composition makes accurate measurements difficult since carbon has a low thermal transfer rate. One end of your brush could be at 500 F and the other end could be 120 F , it all depends on where you measure it.
With all that crap said, monitoring case temperature is about the best we have. Human hands is a terrible way to guesstimate temperature. We all have different thermal thresholds we will tolerate. My wife feels actual pain at 125- 130 F, my hands can tolerate 185+ F for short periods without any damage or pain. At 212-220+ I can only hold things long enough to move them around and let them go. I have witnessed guys bare handed moving, manipulating and working with metal at 285-300 F without pain or burn/injury. I wish I had a thermal imaging camera back then just to see what was really happening. Infrared thermometers are dirt cheap now, and surprisingly accurate. You can get a K type thermocouple and display for under $15 on eBay, Theres no reason to not know what temperature your motor is reaching. Just measure your case temp and assume the rotor, brush and commutator temps will be higher and go from there. |
03-10-2016, 09:10 AM | #26 |
Gone Wild
Join Date: May 2012
Location: Rio Verde, Az
Posts: 7,125
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Re: How hot should a motor get?
I think the best place to measure is on the case near the armature terminals. That is the hottest part of my motor.
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03-10-2016, 11:05 AM | #27 | |
Techno-Nerd
Join Date: Jun 2011
Location: West Virginia
Posts: 19,654
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Re: How hot should a motor get?
Quote:
That would nullify the controller's motor protection feature of reducing power at 120°C and shutting down at 150°C, so the motor could overheat and fail, but you have to replace the motor to replace the embedded sensor anyways. |
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03-10-2016, 05:16 PM | #28 | |
Over This Interview Is...
Join Date: Jun 2012
Location: AZ
Posts: 17,449
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Re: How hot should a motor get?
Quote:
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04-05-2020, 01:39 PM | #29 |
Not Yet Wild
Join Date: Apr 2020
Posts: 3
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Re: How hot should a motor get?
I am going to buy an IR heat next. My motor runs hot and stops suddenly after running for 20 minutes. I wait a while and the cart runs fine. Thought it was the motor winding opening up but I'm not sure. By the time I get towed, Jack up the cart and set up to check the motor (jump A1 to S1, 12V to A2 S2) the cart is back to running good. Chasing my tail. Any thoughts?
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04-05-2020, 01:44 PM | #30 |
Not Yet Wild
Join Date: Apr 2020
Posts: 3
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Re: How hot should a motor get?
Does the NPX 4834EZ have a high temperature cutout that will reset by itself?
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