This paper presents a simplified fuzzy logic-based speed control scheme of an interior permanent magnet synchronous motor (IPMSM) above the base speed using a flux-weakening method. In this work, nonlinear expressions of d-axis and q-axis currents of the IPMSM have been derived and subsequently incorporated in the control algorithm for the practical purpose in order to implement fuzzy-based flu...

In this paper, a three-phase drive with a six-leg Voltage Source Inverter (VSI) and an open-end winding Interior Permanent Magnet Synchronous Machine (IPMSM) designed for the traction of an electric vehicle is studied in flux-weakening operation. The topology allows the functionality of a high power charger to be obtained, without adding any other supplementary power devices. On the other hand,...

Heat transfer coefficient in nucleate pool boiling near critical heat flux at least one orderhigher than the convectional heat transfer modes. In this paper, an experimental setup isdesigned and fabricated to investigate the mechanism of heat transfer from boiling surface tobulk liquid near critical heat flux. The images of pool boiling near the high heat flux regionreveals that the individual ...

The permanent magnet brushless DC motor (BLDCM) is typically controlled using the six-step commutation method, and flux-weakening method employed to enable operate at speeds higher than base speed. Currently, it considered that weak magnetic angle range 0-pi/3, while for deep weakening pi/3-pi/2. In field-weakening control, a forward shift of point results in circulating current flowing three-p...

Through molecular dynamics, we study the d = 2, 3 classical model of N coupled rotators (inertial XY model) assuming a coupling constant which decays with distance as r ij (α ≥ 0). The total energy < H > is asymptotically ∝ NÑ with Ñ ≡ [N − (α/d)]/[1 − α/d], hence the model is thermodynamically extensive if α/d > 1 and nonextensive otherwise. We numerically show that, for energies above some th...

A coupled global climate model is used to evaluate processes that determine the equilibrium location of the sea-ice edge and its climatological annual cycle. The extent to which the wintertime ice edge departs from a symmetric ring around either pole depends primarily on coastlines, ice motion, and the melt rate at the ice-ocean interface. At any location the principal drivers of the oceanic he...