Technical notes on electromagnetically-excited noise and vibrations
This section of e-NVH Academy contains articles and technical notes on Electromagnetically-excited Noise, Vibration, Harshness and more generally on noise and vibrations of electrical machines based on EOMYS ENGINEERING consulting, testing and research experience.
- Review of noise sources in electric machines
- Magnetic noise and vibrations in electrical machines
- Aerodynamic noise in electrical machines
- Mechanical noise in electric machines
- Electromagnetically-excited noise and vibrations in railway applications
- Electromagnetically-excited noise and vibrations in automotive applications (electric vehicles EV/HEV NVH)
- Electromagnetically-excited noise and vibrations in naval applications
- Electromagnetically-excited noise and vibrations in industrial applications
- Electromagnetically-excited noise and vibrations in energy applications
- Electromagnetically-excited noise and vibrations in aeronautic applications
- Electromagnetically-excited noise and vibrations in medical appliances
- Electromagnetically-excited noise and vibrations in home appliances
- Noise mitigation techniques of electrical machines
- What is a wavenumber (spatial order or space order)?
- What is an electrical order (or mechanical order)?
- What are the main transfer paths of electromagnetic noise and vibrations?
- What is Transfer Path Analysis (TPA)?
- What is the difference between air-borne noise and structure-borne noise?
- What is GCD (Greatest Common Divider)?
- What is LCM (Least Common Multiple)?
- What is Unbalanced Magnetic Pull (UMP) or Unbalanced Magnetic Force (UMF)?
- What is a FRF (Frequency Response Function)?
- What are slotting force harmonics?
- What is the slot/pole combination of main EV/HEV e-powertrains?
- What are saturation force harmonics?
- What are stator winding force harmonics?
- What is tooth modulation effect?
- What is PWM (Pulse-Width Modulation)?
- What are PWM force harmonics / PWM electromagnetic excitations?
- What is the switching frequency of main EV/HEV e-powertrains?
- What is a structural mode / natural frequency?
- What is damping?
- What is A-weighting?
- What is psychoacoustics?
- What is a critical band?
- What is masking effect?
- What is loudness?
- What is sharpness?
- What is modulation effect (fluctuation strength or roughness)?
- What is tonality?
- What is a spectrogram?
- What is a spatiogram?
- What is an order tracking analysis?
- What is the difference between Sound Pressure Level (SPL) and Sound Power Level (SWL)?
- What is the difference between noise in air or underwater?
- Does Maxwell Tensor include Lorentz Forces ?
