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A comprehensive vibration synthesis process for synthesizing the electromagnetically excited acoustic vibrations in electric drives is explored in this paper. The study is performed on a traction drive for a hybrid electric vehicle. The work derives and highlights several key aspects for modeling and assessing the acoustic characteristics of electric drives. The influence of different force excitation...
A method to efficiently synthesize electromagnetically excited vibrations in electric drives is explored in this paper. The process integrates well into a drive system's design phase and allows to characterize the vibrations over the entire torque-speed range. The study is performed on a traction drive for a hybrid electric vehicle. The influence of different force excitation shapes on the resulting...
The design process of a switched reluctance drive for household applications is described. The machine requirements for modern household applications are summarized and the design process of a 150 W three-phase switched reluctance drive is described. During the process special attention was paid to the stator's mechanical resonance frequencies to assess influences of the acoustic noise. Also drive...
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...
To improve on current methods of minimally invasive surgery, research is being carried out on systems that will permit procedures to be conducted on the micro-scale using remotely operated micro-robots. One of the major stumbling blocks to meeting this need has been the absence of a practical micromotor with a volume of less than 1 mm3 with which to drive these devices. To rectify this, we present...
This paper shows a possibility to calculate and predict the sound radiation of electrical machines with the finite element analysis (FEA). Based on knowledge of analytical approaches, it is tried to show a possibility to calculate the noise emission of induction machines as a 2D-multi-physical problem with a more modern method. The influence of the machine housing relating to frequency spectrum is...
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