How Do I Keep my Motor from Getting Hot?

Updated May 16, 2018

Reported In


  • Kollmorgen Drive and Motor Cable


  • Kollmorgen P7000 drive
  • T22NRLC-LDN-NS-03 stepper motor

Issue Details

I'm trying to run Kollmorgen P7000 drive and T22NRLC-LDN-NS-03 stepper motor setup for an extended period of time. I notice that it gets hot after about 30 minutes of operation. How can I mitigate this?


There are a couple of options you can try:
  • Enable current reduction by flipping DIP switch 10 to the on position
  • Mount the motor to a heat sink. Per the datasheet for the NEMA 23, we recommend a 10 x 10 x 1/4 in. aluminum plate.
  • Incorporate physical cooling into your system, such as fans
  • Give the system time to rest by powering it off between tests or runs

Additional Information

  • Current reduction reduces drive and motor heating by invoking standby current reduction. When enabled, current reduction cuts motor current to 75 percent of its commanded value 100 ms after receipt of the last step pulse. You can adjust the reduction proportion and delay to other values using the P7000 Tools configuration software.
  • You may not be able to notice the temperature decrease with touch when enabling current reduction. 
  • Regardless of these options, the motor will still get hot. These steps will just help mitigate that.


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