Multi-physics model of DC micro motors for dynamic operations

• Published in: Sensors and actuators. A. Physical. 2023-10, Vol.361, p.114570, Article 114570
• Main Authors: Reato, F.M., Ricci, C., Misfatto, J., Calzaferri, M., Cinquemani, S.
• Format: Article
• Language: English
• Subjects: Computer-aided engineering; Friction in DC motors; Micro actuator; Micro-DC motor; Multi-physics; Multibody
• ISSN: 0924-4247; 1873-3069
• DOI: 10.1016/j.sna.2023.114570

Dynamic regime mechatronic devices equipped with micro-DC-motors are characterized by a stick-slip motion during the majority of their working life. An in-depth analysis of the contribution of all the different friction components represents a prerogative for an accurate design in such mechatronic applications. The paper considers a revaluation of the classic DC-motor characterization model, through a different approach based onto a co-simulation multi-physics numerical model and through a different analysis of the internal friction phenomena. The model is developed through a novel evaluation approach of the mechanical and electrical behavior, respectively through a multibody analysis and an equivalent circuit model analysis. The kinematic and dynamic responses, as well as the estimation of electrical absorption parameters obtained by the numerical co-simulation model, are validated through indirect experimental measurements obtained from two micro-DC motors, different in dimensions and performances and powered with different voltages. [Display omitted] •Micro DC-motors are characterized by stick-slip motion in most of their working life.•In-depth analysis of the internal friction phenomena.•Multi-physics numerical model: multibody and equivalent circuit model analysis.•Numerical performance comparison between standard and co-simulation model.•Validation through indirect experimental measurements.