M
Matt
- Jan 1, 1970
- 0
Hello,
I have designed a power supply using Vicor parts
(www.vicorpower.com). I am trying to meet a part of MIL-STD-1399(NAVY)
300A (military power standard) that states:
"no individual harmonic line current from the second harmonic through
20kHz exceeds a magnitude of 100/n percent of the unit's rated full
load fundamental current."
Our system only brings in 2.5A and runs 120V 60Hz. The EMI filter we
have out in front of the AC/DC vicor module is the JMK filter
HH-1355-6.3 that really starts filtering from 10kHz-20Meg which helps
get rid of the conducted emissions. I am having problems in the
4kHz-8kHz range of my current THD however and am wondering how I
should go about fixing it. A simple filter out in front of the EMI
filter would cause a slip in the power factor of the unit which is
also regulated by MIL-STD-1399(NAVY) 300A. Are there EMI filters that
can kill the lower frequencies (4-8kHz) as well as the high (20MHz)?
Have you ever used one that was designed for Power Factor Correction
AC/DCs such as the VI-HAM from vicor?
Thank you in advance for any advice,
Matt
I have designed a power supply using Vicor parts
(www.vicorpower.com). I am trying to meet a part of MIL-STD-1399(NAVY)
300A (military power standard) that states:
"no individual harmonic line current from the second harmonic through
20kHz exceeds a magnitude of 100/n percent of the unit's rated full
load fundamental current."
Our system only brings in 2.5A and runs 120V 60Hz. The EMI filter we
have out in front of the AC/DC vicor module is the JMK filter
HH-1355-6.3 that really starts filtering from 10kHz-20Meg which helps
get rid of the conducted emissions. I am having problems in the
4kHz-8kHz range of my current THD however and am wondering how I
should go about fixing it. A simple filter out in front of the EMI
filter would cause a slip in the power factor of the unit which is
also regulated by MIL-STD-1399(NAVY) 300A. Are there EMI filters that
can kill the lower frequencies (4-8kHz) as well as the high (20MHz)?
Have you ever used one that was designed for Power Factor Correction
AC/DCs such as the VI-HAM from vicor?
Thank you in advance for any advice,
Matt