LPF for SiC high switching frequency

[Harith Al-Badrani]

Hi
I have question if you can help me
I want to design LPF between SiC Inverter and Induction Motor
switching frequency of my inverter is 50KHz
Output voltage is 400V
for the IM motor
power 15 KW
current 28.5 A
P.F. 0.84

I locking for a formula to calculate the values of inductance and capacitor of the 3 phase LPF.

Thanks in Advance

 

[Illmatic1]

The values of inductance and capacitance will depend on several factors such as the type of filter, the frequency range, the current rating, the power factor, etc. Generally, the higher the frequency, the higher the inductance and capacitance values required for the filter. For a 3-phase LPF, you can use the following equation to calculate the desired values:L = 1 / (2πfC)Where L is the inductance in Henries, f is the switching frequency in Hertz, and C is the capacitance in Farads. For your application, with a switching frequency of 50 kHz and output voltage of 400V, the inductance and capacitance values would be:L = 1 / (2π(50,000)(400)) = 0.000004 H = 4 mHC = 1 / (2π(50,000)(0.000004)) = 400 F