We have performed first-order reversal-curve measurements of the temperature-driven metal-insulator transition in VO2 thin films, which enable quantitative analysis of the hysteresis behavior. An unexpected tail-like feature in the contour plot of the reversal-curve distribution indicates the existence of metallic domains, even at temperatures below the closing of the hysteresis. These domains ...

Incorporation of hysteresis models in electromagnetic analysis approaches is indispensable to accurate field computation in complex magnetic media. Throughout those computations, vector nature and computational efficiency of such models become especially crucial when sophisticated geometries requiring massive sub-region discretization are involved. Recently, an efficient vector Preisach-type hy...

Magnetic tape recordings suffer from nonlinear distortions, mainly due to saturation effects. We model the audio signals using a linear Autoregressive (AR) model with additive Gaussian noise and the recording procedure with a nonlinear measurement function. To analyze the nonlinearities we perform measurements on magnetic tape devices in saturation. Due to ferromagnetic effects a nonlinearity w...

The sinusoidal magnetization of a sample material is difficult to achieve, since the magnetic hysteresis poses a strong nonlinearity. In order to find the proper input voltage, a feed-forward strategy with a hysteresis model identification and inversion is proposed. The classical Preisach model in the Everett formulation is used for this purpose and eddy current effects are also included. The c...

Position control of a wide class of hysteretic systems, that includes those described by a Preisach model, is considered. The main focus of this paper is stability, tracking and the trajectories of a hysteretic system controlled by a PI controller. The system output (not its derivative) is measured and controlled. It is shown that, for arbitrary reference signals, the closed-loop system is BIBO...

In this paper, we consider a play-like hysteresis operator defined by an n order rate-independent differential system. We investigate the properties of the operator for n = 1 and n = 2. We show that the operator for n = 2 satisfies a one-step wiping out property. This result can be extended to show that the n order operator satisfies an (n − 1)-th step wiping out property. Thus the new family o...

Calculations of iron losses in the electrical machines are normally based on experimental characteristics of core material used in the machines. These methods with simplified machine analysis approximations are usually employed for calculation of total iron losses of electrical machines whilst local flux densities and corresponding local iron losses especially when designing of the machine and ...