scholarly journals A Combined Model and Data-Driven Approach for the Determination of Rotor Temperature in an Induction Machine

Sensors ◽  
2021 ◽  
Vol 21 (13) ◽  
pp. 4512
Author(s):  
Razvan Mocanu ◽  
Alexandru Onea ◽  
Constantin Catalin Dosoftei
Keyword(s):  
Induction Machine ◽  
Combined Model ◽  
Safety Regulations ◽  
Prediction Function ◽  
Data Driven Approach ◽  
Observation Function ◽  
General Desire ◽  
Nonlinear Autoregressive ◽  
Posterior Estimate

The need for protection of electrical machines comes as a demand of safety regulations in the automotive industry as well as a result of the general desire to obtain a robust and reliable electric powertrain. This paper introduces a hybrid method for estimating the temperature of the rotor of an Induction Machine (IM) based on a Nonlinear Autoregressive Network with Exogenous inputs (NARX) used as a prediction function within a particle filter. The temperature of the stator case is measured, and the information is used as an input to a NARX network and as a variable to a thermal process with first-order dynamics which serves as an observation function. Uncertainties of the NARX and thermal model are determined and used to correct the posterior estimate. Experimental data are used from a real IM test-bench and the results prove the applicability and good performance.

Direct determination of the concentration dependence of diffusivities using combined model-based Raman and NMR experiments

2009 ◽  
Vol 277 (2) ◽  
pp. 96-106 ◽  
Author(s):  
E. Kriesten ◽  
M.A. Voda ◽  
A. Bardow ◽  
V. Göke ◽  
F. Casanova ◽  
...  
Keyword(s):  
Concentration Dependence ◽  
Direct Determination ◽  
Combined Model ◽  
Model Based

Accurate Determination of Induction Machine Torque and Current Versus Speed Characteristics

2017 ◽  
Vol 53 (4) ◽  
pp. 3285-3294 ◽  
Author(s):  
Emmanuel B. Agamloh ◽  
Andrea Cavagnino ◽  
Silvio Vaschetto
Keyword(s):  
Accurate Determination ◽  
Induction Machine

scholarly journals A Formal Account of Structuring Motor Actions With Sensory Prediction for a Naive Agent

2020 ◽  
Vol 7 ◽  
Author(s):  
Jean-Merwan Godon ◽  
Sylvain Argentieri ◽  
Bruno Gas
Keyword(s):  
Sufficient Conditions ◽  
Combinatorial Structure ◽  
Prediction Function ◽  
Formal Framework ◽  
Sensory Predictions ◽  
Spatial Displacements ◽  
Motor Actions ◽  
Sensory Prediction ◽  
Sensorimotor Contingency

For naive robots to become truly autonomous, they need a means of developing their perceptive capabilities instead of relying on hand crafted models. The sensorimotor contingency theory asserts that such a way resides in learning invariants of the sensorimotor flow. We propose a formal framework inspired by this theory for the description of sensorimotor experiences of a naive agent, extending previous related works. We then use said formalism to conduct a theoretical study where we isolate sufficient conditions for the determination of a sensory prediction function. Furthermore, we also show that algebraic structure found in this prediction can be taken as a proxy for structure on the motor displacements, allowing for the discovery of the combinatorial structure of said displacements. Both these claims are further illustrated in simulations where a toy naive agent determines the sensory predictions of its spatial displacements from its uninterpreted sensory flow, which it then uses to infer the combinatorics of said displacements.

Quasi-Dynamic Urban-Location Models with Endogenously Determined Travel Costs

1979 ◽  
Vol 11 (5) ◽  
pp. 575-584 ◽  
Author(s):  
D E Boyce ◽  
F Southworth
Keyword(s):  
Dynamic Model ◽  
Combined Model ◽  
Trip Distribution ◽  
Travel Costs ◽  
Urban Location ◽  
Location Models ◽  
Assignment Model ◽  
Job Location

A quasi-dynamic model of residential and job location is fused with the equilibrium trip-assignment model in the manner suggested by the combined model of trip distribution and assignment. The implications of this combined model for assumptions about future levels of interaction are examined. Extensions of the model to include explicit housing stocks and prices and the determination of residential- and job-location attractiveness are considered.

Wages and Learning in Internal Labor Markets: Evidence From a Taiwanese Company

2006 ◽  
Vol 5 (1) ◽  
Author(s):  
Ming-Jen Lin
Keyword(s):  
Labor Markets ◽  
Fixed Effects ◽  
Internal Labor Markets ◽  
Fixed Effects Model ◽  
Combined Model ◽  
The Public ◽  
Positive Effects ◽  
Learning Speed ◽  
New Evidence

AbstractThis paper analyses the personnel records of a Taiwanese auto dealer employing three distinct internal labor markets (ILMs), adding new evidence that builds upon recent empirical and theoretical works on ILMs. We show that the public learning model proposed by Farber and Gibbons (1996) is not supported in general by our data because the behaviors of empirical wage residuals covariance matrix contradict the martingale predictions derived from the their model. However, “public learning” may not be unrealistic once individual specific learning speed is introduced. Furthermore, we find that the positive effects of levels, on both salary and bonus equations, are smaller under a fixed effects model than under an OLS (combined) model. However, part of the wage variations is contributed by individual heterogeneity rather than the hierarchy itself. Evidence also shows that education plays an important role in the determination of levels.

scholarly journals Form Factor Measurements at BESIII for an Improved Standard Model Prediction of the Muon g-2

2018 ◽  
Vol 46 ◽  
pp. 1860026
Author(s):  
Marco Destefanis
Keyword(s):  
Form Factor ◽  
Standard Model ◽  
Model Prediction ◽  
Particle Physics ◽  
Standard Model Prediction ◽  
Final States ◽  
Direct Measurements ◽  
The Standard Model ◽  
Data Driven Approach

The anomalous part of the magnetic moment of the muon, (g-2)[Formula: see text], allows for one of the most precise tests of the Standard Model of particle physics. We report on recent results by the BESIII Collaboration of exclusive hadronic cross section channels, such as the 2[Formula: see text], 3[Formula: see text], and 4[Formula: see text] final states. These measurements are of utmost importance for an improved calculation of the hadronic vacuum polarization contribution of (g-2)[Formula: see text], which currenty is limiting the overall Standard Model prediction of this quantity. BESIII has furthermore also intiatated a programme of spacelike transition form factor measurements, which can be used for a determination of the hadronic light-by-light contribution of (g-2)[Formula: see text] in a data-driven approach. These results are of relevance in view of the new and direct measurements of (g-2)[Formula: see text] as foreseen at Fermilab/USA and J-PARC/Japan.

The determination of induction motor losses in steel taking into account its saturation

2022 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Mykhaylo Zagirnyak ◽  
Vita Ogar ◽  
Volodymyr Chenchevoi ◽  
Rostyslav Yatsiuk
Keyword(s):  
Induction Motor ◽  
Electromotive Force ◽  
Induction Machine ◽  
Content Type ◽  
Operating Modes ◽  
Machine Steel ◽  
Harmonic Components ◽  
First Time ◽  
Analytical Expressions

Purpose This paper aims to work out a method for calculating losses in induction motor steel taking into account its saturation. Design/methodology/approach The theory of electric machines is applied during the analysis of induction motor equivalent circuits. The theory of Fourier series is used to determine the harmonic components of voltage, current and power. Instantaneous power theory and trigonometric transformations are used to solve algebraic and differential equations and their systems. The methods of approximation and interpolation are applied to obtain analytical expressions from the experimental data. Experimental research was carried out to verify the reliability of theoretical provisions and research results. Findings A method for assessing an induction machine steel as a function of the generalized electromotive force has been proposed. It allows taking into account higher harmonics of the current, which are caused by the presence of nonlinearity of an induction motor magnetic circuit. Practical implications The obtained results can be used in calculating the energy characteristics and operating modes of an induction motor, as well as in the construction of control systems. Originality/value A method for determining the losses in the stator steel of an induction motor, using a generalized electromotive force, has been proposed for the first time. It enables taking into account the currents flowing both in the stator circuit and in the rotor circuit.

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