(Pdf) direct liquid cooling method verified with a permanent-magnet traction motor in a bus electricity kwh cost uk


An interior 1 electricity unit is equal to how many kwh permanent magnet (IPM) machine with Δ+U shape rotor topology is proposed and compared its electromagnetic performance with typical V shape and Δ shape for electric vehicle (EV) applications. The pole-arc to pole-pitch ratios are optimized to maximize the fundamental air-gap flux density and minimize its total harmonic distortion (THD) of all the three IPM machines by the finite element (FE) method. It can be obtained that Δ+U shape rotor topology has the lowest THD of the air-gap flux density. The back electromotive force (EMF) and its THD orders, cogging gaston y la agrupacion santa fe torque, torque density, torque ripple, d- and q-axis inductances, saliency ratio, and iron loss of three machines are analyzed and compared. It is demonstrated that, the Δ shape IPM machines has the highest average torque, and electricity kwh the torque ripples of V shape and Δ shape machines are almost the same. The Δ+U shape IPM machine has the lowest torque ripple and iron loss with only a little reduction of average torque. Finally, the Δ+U shape IPM machine is prototyped to verify the results of the FE analysis.

This paper proposes a novel outer-rotor flux-switching permanent-magnet electricity outage compensation (OR-FSPM) machine with specific wedge-shaped magnets for in-wheel light-weight traction applications. Firstly, the geometric topology is introduced. Then, the combination principle of stator slots and rotor poles for OR-FSPM machines is investigated electric utility companies in florida. Further, to demonstrate the relationship between performance specifications (e.g., torque and speed) and key design parameters and dimensions (e.g. rotor outer diameter and stack length) of OR-FSPM machines at preliminary design stage, an analytical torque-sizing equation is proposed, and verified by 2-D finite-element analysis gas kansas city (FEA). Moreover, optimizations of key dimensions are conducted on an initially-designed proof-of-principle three-phase 12-stator-slot/22-rotor-pole prototyped machine. Then, based on 2D-FEA, a comprehensive comparison between a pair of OR-FSPM machines with npower electricity meter reading rectangular- and wedge-shaped magnets and a surface-mounted permanent-magnet (SPM) machine is performed. The results indicate that the proposed OR-FSPM machine with wedge-shaped magnets exhibits better flux-weakening capability, higher efficiency, and wider speed range than the counterparts, especially for torque capability, where the proposed wedge-shaped magnets-based one could produce 40% and 61.5 % more torque than the rectangular-shaped magnets-based machine and SPM machine, respectively, with same rated current electricity usage density (5A/mm2). Finally, the predicted performance of the proposed OR-FSPM machine is verified by experiments on a prototyped machine.

As a kind of traction device, interior permanent-magnet synchronous machines (IPMSMs) are widely used in modern electric vehicles. This paper performs kushal gas agencies belgaum a design and comparative study of IPMSMs with different rotor topologies (spoke-type PMs, tangential-type PMs, U-shape PMs, and V-shape PMs). The research results indicate that the IPMSM with V-shape PMs is more satisfying with comprehensive consideration. Furthermore 1 unit electricity cost in gujarat, the IPMSM with V-shape PMs is investigated in detail. The influences of geometrical parameters (magnetic bridge and angle between the two V-shape PMs under each pole, etc.) on the performances of V-shape motor are evaluated based on finite-element method (FEM). For accurate research, the effects of saturation, cross-magnetization, and the change in PM flux linkage on d-and q-axis inductances are gas 37 weeks pregnant considered. The back-electromotive force (EMF), flux leakage coefficient, average torque, torque ripple, cogging torque, power per unit volume, power factor, and flux-weakening ability are investigated, respectively. The experimental results verify the validity and accuracy of the gas vs diesel mpg process presented in this paper.

An electrical and mechanical design process for a traction motor in a hybrid bus application is studied. Usually, the design process of an electric machine calls for close cooperation between various engineering disciplines. Compromises may be required to satisfy the boundary conditions of electrical, thermal, and mechanical performances static electricity jokes. From the mechanical point of view, the stress values and … [Show full abstract] the safety factors should be at a reasonable level and the construction lifetime predicted by a fatigue analysis. In a vehicle application, the motor has to be capable of generating high torque when gas after eating red meat accelerating, and in normal operation, the losses of the machine should be low to be able to cool the machine. Minimization of the no-load iron losses becomes a very important electrical design requirement if the traction motor and the generator are mechanically connected with an internal combustion gas 1940 engine when it is operating as the only source of torque. The manufacturing costs of the motor are also taken into account in this paper. Read more