What is the difference between general high-frequency noise filters and pulse noise filters?
- EMV-Bauelemente >
A. General high-frequency noise filters are designed for countermeasures against noise components that appear as a harmonic component of switching noises produced by switching power supplies and inverters. The noise energy is not high. However, high-energy noises can occur depending on the device. When noise energy is too high, the core of a noise filter can be saturated and the attenuation characteristics of the noise filter can be greatly lowered. Pulse noise filters, to overcome this problem, use a material with a high saturation magnetic flux density (approximately three times that of general products when the shapes are assumed to be the same)