Electric power dynamometers employ electric motors to meticulously gauge the torque output from the shafts of various power mechanisms, seamlessly combining this with rotational speeds to accurately determine the power equipment's capability.

Dynamometers are categorized based on the type of current they utilize, including DC dynamometers, AC dynamometers, and eddy current dynamometers, each offering unique advantages tailored to specific testing requirements.

Further classifications include hysteresis dynamometers, magnetic particle dynamometers, eddy current dynamometers, and electric power dynamometers, designed to cater to different testing scenarios and requirements.