How to Select a DC Micromotor-part3

To calculate the speed at the desired load torque, the following formula applies:

As this speed value is very close to the desired value, the selection of this motor appears reasonable. A check of
the thermal heat rise of the motor is in order to confirm the selection. The power dissipated by the motor is given
by:

To summarize the desired values versus the selected values for the 2230T024S motor:
Parameter Desired Value Selected Value
Voltage 20 VDC 20 VDC
Torque .425 oz-in .425 oz-in
Speed 5,000 rpm 5,187 rpm
Usually a motor selection involves many more factors than are presented here. This method, however,
provides the designer with a starting point for the selection of motors for a particular set of application parameters.
Please contact MicroMo Electronics for further assistance.