Driving habits

JohnnieB · 05-06-2014, 08:55 AM

Yurtle is right, 180°C (356°F) is the max temp for Class-H insulation, but other than embedding thermocouples in the windings, we have to measure the temperature of the wires in the windings indirectly and derate it accordingly.

For non-vented motors, 115°C (239°F) is the derated max temperature when measured at the motor case.
Also, there is a time delay for the heat reaching the motor case. Therefore the motor case temperature will continue to increase after the cart has stopped at the top of a steep hill.

If you have a vented motor, contact the manufacturer and ask what the max case temperature should be.

05-06-2014, 08:55 AM	#11
JohnnieB Techno-Nerd Join Date: Jun 2011 Location: West Virginia Posts: 19,654	Re: Driving habits Yurtle is right, 180°C (356°F) is the max temp for Class-H insulation, but other than embedding thermocouples in the windings, we have to measure the temperature of the wires in the windings indirectly and derate it accordingly. For non-vented motors, 115°C (239°F) is the derated max temperature when measured at the motor case. Also, there is a time delay for the heat reaching the motor case. Therefore the motor case temperature will continue to increase after the cart has stopped at the top of a steep hill. If you have a vented motor, contact the manufacturer and ask what the max case temperature should be.

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