title: Defining the coupling coefficient for electrodynamic transducers.
abstract: This paper provides a simple, practical definition of the coupling coefficient for electrodynamic transducers. Comparing to efforts made in previous works that assumed a lossless spring-inductor model, the definition presented here is based on a lossy mass-inductor model. Time-harmonic analysis is used to model the energy flow in the transducer. Both energy storage and energy dissipation are included in the electrodynamic coupling coefficient definition. An in-depth discussion is provided to explain and justify the derivation and overall methodology. This definition is expected to provide a useful and practical measure of the electromechanical energy conversion performance of electrodynamic transducers, both actuators and generators.
authors.affiliation: Interdisciplinary Microsystems Group, Department of Electrical and Computer Engineering, University of Florida, 213 Larsen Hall, Gainesville, Florida 32611.
authors.forename: Shuo
authors.initials: S
authors.lastname: Cheng
authors.forename: David P
authors.initials: DP
authors.lastname: Arnold
mesh_terms: D004553:Electric Conductivity; D004735:Energy Transfer; D004738:Engineering / Q000295:instrumentation*; D004867:Equipment Design; D060526:Magnetic Fields; D008962:Models, Theoretical; D013997:Time Factors; D014159:Transducers