Thermistor Placement

[n1866878]

Hi,

So I'm looking to get a KDZ48400 controller to use with my ME0909 motor. As far as I can see, the ME0909 doesn't have a built in temperature sensor. Kelly Controller's site recommends to use a KTY84-130 thermistor and connect this to one of the data pins on the controller. My question is - where do I place the thermistor on the motor for the best reading?

KDZ48400 - http://kellycontroller.com/kdz4840024v-48v400aseriespm-p-955.html
ME0909 - https://www.evdrives.com/product_p/mot-me0909.htm
Thermistor - http://kellycontroller.com/kty84-130-thermistor-p-314.html

Thanks

 

[amberwolf]

Depends on what you want to read.

If you want to monitor winding temperature, which will spike higher and faster and during heavy power usage, then epoxy the sensor in the windings.

If you want to monitor more average motor temperatures, which take longer to heatsoak and indicate temperature spikes, epoxy the sensor against the stator laminations away from the windings themselves.

If you want to monitor only overall temperatures, put it down near the bearings on the case; this will not indicate high winding temperatures for some time (possibly several minutes or longer depending on motor size and cooling)

 

[n1866878]

Which one should I be monitoring? I'm quite new to this. The KDZ48400 controller has an option to set at what motor temperature to shut down at.

 

[fechter]

On a brushed motor it will be pretty hard to mount the sensor on the windings. Most brushed motors have the temp sensor attached to the housing near the brush holders. This requires taking apart one end of the motor and removing the brushes, which may be a pain.

Another option would be to drill a small hole into the housing someplace where it won't go through and insert the sensor into the hole. The thermistor needs a pair of wires coming off it and they need to be well insulated. I would bend one leg of the thermistor 180 degrees so both head out in the same direction, solder leadwires on, then heat shrink to insulate. You can use silicone glue to hold the sensor in place.