I am using the listed motor and the accompanying matlab code to calculate motor efficiency in hopes that I can find the reason for discrepancy with my simulations. I assumed the efficiency would be somewhere around 80% but this program is giving me a maximum of 30% which I feel cannot be correct. I entered the following:
Please enter the stall torque in oz-inch : 240
Please enter the stall current in mA : 5600
Please enter the rated voltage in Volts : 12
Please enter the free run currennt in mA : 300
Please enter the free run speed in RPM : 130
This results in the attached image which indicates an efficiency of less than 30%. This seems incredibly strange. Please advise.