—Transformer terminal equivalents obtained via admittance measurements are suitable for simulating high-frequency transient interaction between the transformer and the network. This paper augments the terminal equivalent approach with a measurement-based voltage transfer function model which permits calculation of voltages at internal points in the regulating winding. The approach is demonstrat...

Single phase induction motors (SPIM) are widely used in residential and commercial applications. Enhancement of efficiency SPIMs can lead to huge energy savings. This paper presents a novel mechanical sensorless control method for SPIM drives. In this method, machine learning algorithm is estimate the slip based on ratio main auxiliary winding currents. To enhance efficiency, terminal voltage r...

This paper proposes a new convergence acceleration method specialized for the magnetic field analyses of synchronous machines based on time-periodic explicit-error-correction (TP-EEC) method. The proposed constructs an auxiliary equation error correction in dq rotational reference frame to convert fundamental harmonic component into DC component. conversion enables us perform using TP-EEC at in...

Necessary and sufficient conditions are given for a satellite knot to be fibered. Any knot k̃ embeds in an unknotted solid torus Ṽ with arbitrary winding number in such a way that no satellite knot with pattern (Ṽ , k̃) is fibered. In particular, there exist nonfibered satellite knots with fibered pattern and companion knots and nonzero winding number.

This work is devoted to the calculation of the undulatory parameters and the study of the influence of te number parallel path of a winding on overvoltage compared to the frame and between turns (sections) in a multiturn random winding of an asynchronous motors supplied with PWMconverters. Keywords—Asynchronous Motors, Parallel path, PWMconverters, Undulatory process, Undulatory parameters, Und...

Hyperbolic versions of the integrable (1+1)-dimensional Heisenberg Ferromagnet and sigma models are discussed in the context of topological solutions classifiable by an integer ‘winding number’. Some explicit solutions are presented and the existence of certain classes of such winding solutions examined.

Misner space, also known as the Lorentzian orbifold R1,1/boost, is one of the simplest examples of a cosmological singularity in string theory. In this work, the study of weakly coupled closed strings on this space is pursued in several directions: (i) physical states in the twisted sectors are found to come in two kinds: short strings, which wind along the compact space-like direction in the c...

A scientific approach to calculating the parameters and characteristics of an asynchronous motor in inter-turn short circuit mode one phase stator is proposed create foundations a diagnostic complex for assessing condition motors transport infrastructure. This consists fact that model with which research carried out, it take into account changes mutual inductance when AC impedance phases change...