D
D from BC
- Jan 1, 1970
- 0
I recall somewhere an author recommended that the inductors be placed
on a ground plane..
That's probably nice for little inductors..Like buttons.
But my toroid is 1/2" tall and about 1.5" wide..
I don't believe putting this toroid flat down on a ground plane is
going to help reduce EMI emissions. Correct?
All the copper windings are too far from the ground plane..
Would it help to Faraday shield the toroid to reduce EMI... ?
(I'm trying to avoid killing my neighbors AM radio reception.)
Could I blanket my toroid with some foil and ground the foil?
Or don't bother...?
Toroid Conditions
f=100khz
I=2A average, 200mA ripple
V=170V peak, 0.4 duty square wave (hard switching)
This toroid is in a earth grounded metal box. The smps power ground is
not connect to earth ground. The toroid is part of an offline
unisolated smps..If the two grounds connect.. .Poof!!!
So ..I'm guessing a faraday shield will be connected to power ground.
That would make the shield "hot" relative to earth ground. Shocking to
touch when live but safe in a closed earth grounded box.
D from BC
on a ground plane..
That's probably nice for little inductors..Like buttons.
But my toroid is 1/2" tall and about 1.5" wide..
I don't believe putting this toroid flat down on a ground plane is
going to help reduce EMI emissions. Correct?
All the copper windings are too far from the ground plane..
Would it help to Faraday shield the toroid to reduce EMI... ?
(I'm trying to avoid killing my neighbors AM radio reception.)
Could I blanket my toroid with some foil and ground the foil?
Or don't bother...?
Toroid Conditions
f=100khz
I=2A average, 200mA ripple
V=170V peak, 0.4 duty square wave (hard switching)
This toroid is in a earth grounded metal box. The smps power ground is
not connect to earth ground. The toroid is part of an offline
unisolated smps..If the two grounds connect.. .Poof!!!
So ..I'm guessing a faraday shield will be connected to power ground.
That would make the shield "hot" relative to earth ground. Shocking to
touch when live but safe in a closed earth grounded box.
D from BC