Power converters
Requisitos de finalización
Power semiconductor converters for vehicles with electric or hybrid drive. Traction inverters for supplying the electric motor from the traction battery.
2. Power converters for electric vehicles
2.9. Noise
Magnetostriction
- Magnetic field tied with the switched current causes mechanical oscillations in all magnetically conductive materials.
- Mechanical
oscillations generate noise corresponding to the switching frequency.
- Switching frequency above 20 kHz is not audible. The upper limit depends on age.
- Standard IGBT technology:
- For power of 100 kW is the switching frequency above 20 kHz practically not achievable (switching losses to high).
- High
switching frequencies achievable with SiC
technology.
