A Practical Approach to the Selection of the Motor-Reducer Unit in Electric Drive Systems

Abstract

The selection of a motor-reducer unit in electrical servo-systems has a profound impact on the dynamic performance of a machine. This choice must be made considering all the limits imposed by each component of the system and all the operational constraints. This article proposes a useful and practical methodology for the correct sizing of a motor-reducer unit. The relationships between motor and transmission are investigated by introducing some easily calculated factors useful for comparing all the available motor-reducer couplings and selecting the best solution.

The article suggests an innovative approach for the selection of a motor-reducer unit that involves solving the problem with the use of graphs that would allow showing all the possible alternatives.

Keywords:

• Electric servo-motor
• Motor and reducer pairing
• Optimal transmission ratio
• Speed reducer

Acknowledgments

^#Communicated by B. Ravani.