Analysis of magnetic hysteresis in a high-precision e-core reluctance actuator compared to measurements

Magnetic hysteresis effects, present in the force of an E-core reluctance actuator, are examined by simulations and measurements. Simulations have been preformed with a finite element method (FEM) and a rate-dependent Preisach hysteresis model has been implemented. Both methods are compared to steady-state ac force measurements for various current excitations. The hysteresis effects in the force of the E-core reluctance actuator are investigated with and without pre-biasing permanent magnet (PM) on the middle tooth