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Radial force and tangential force, which deform stator core, are the main causes of vibration and noise. There are many methods to minimize such exciting forces by designing of rotor shape. However, modification of rotor shape increase development cost of the motor. Therefore, step skewed rotor is applied to the design in order to reduce exciting force so that both reduction of vibration and noise...
This paper presents evaluation and analysis of acoustic noise and vibration in interior permanent magnet synchronous motor (IPMSM). Acoustic noise and vibration have a close relationship. Acoustic noise is generated by vibration of the motor stator due to the magnetic force. It is called local force that is composed of normal force and tangential force. Harmonics of normal force associated with resonant...
Integrated starter and generator (ISG) is working as starter after vehicle idle stopping and generator during vehicle driving. When ISG works as starter to operate engine, ISG produces maximum power at the operating speed 4000 rpm to remove vibration of initial starting of the engine. In that time ISG produces whine noise which can be detected inside a vehicle. There are two methods to reduce the...
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