Model of EMC Conducted Emission Test Reciever - Quasi peak measurements
- From: Klaus Vestergaard Kragelund <klausvk@xxxxxxxxxx>
- Date: Wed, 25 May 2005 00:31:06 +0200
Hi
I'm playing with using pseudo random PWM on a motor drive to minimize the conducted emission level of the inverter
For that purpose I'm testing a system using a standard Rhode&Swartz test reciever with the following frequency band 150kHz to 30MHz (9kHz bandwidth, 5kHz step and both average and quasi peak measurements)
The PWM converter clock is running at 18kHz and modulated +/-20% at 100Hz rate (in the beginning triagular shaped mdulation)
But the measurements take a long time - do anyone know how to model the input of the quasi peak detector to mimic the result seen on the test reciever? If I get a model I can run some simulations instead.
As far as I know the quasi-peak detector consists of a rectifying diode in series with a RC filter and a load resistor on the output of that filer (shorter rise time than fall time to transients)
Thanks
Klaus .
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