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This paper presents an initial state of the art about the estimation of the sound power emitted by electrical machines. The paper proposes a new method, more accurate, to evaluate the sound power emitted by a PM machine by a 3D FEM mechanical analysis. It also takes into account tangential forces applied on the teeth. Finally the papers shows the impact of any harmonic force in the global emitted...
The doubly salient electro-magnetic motor (DSEM) is subject to significant torque ripple when working with traditional standard angle control method. To weaken the effects of the torque ripple for further applications of DSEM such as wind power generation and aerospace, in-depth analysis of the ripple generation mechanism and two novel strategies of inner torque loop and torque distribution control...
This paper describes an efficient approach for skillfully guiding the magnet reduction design in a single-phase line-start permanent magnet motor (LSPMM) without worsening motor torque and efficiency performances. The relevant decrease of magnet torque due to magnet reduction is compensated by improving the unique hybrid torque characteristic, that enhancing the balance ratio of reluctance torque...
Due to the increase of the number of wind turbines connected directly to the electric utility grid, new regulator codes have been issued that require low voltage ride-through capability for wind turbines so that they can remain online and support the electric grid during voltage sags. Conventional ride-through techniques for the doubly fed induction generator (DFIG) architecture result in compromised...
The objective of this paper is to present an analytical method allowing large signal stability analysis of an electric system constituted by a DC power supply and its output filter connected to a constant power load. Here, the load is realized by a voltage source inverter motor mechanical load actuator system. We suppose that proper controllers are used to drive the actuator. Then, a large signal...
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