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Asymetric magnetic field
Posted 14 mai 2017, 13:56 UTC−4 1 Reply
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Hi!
I'm using a magnetic field 2D model and a 50Hz frequency study.
I have three power-lines that transmit 3-phase currents. That is, each coil is 120[deg] phase shifted to the
other.
The power-lines are placed in [-9,0], [0,0] and [9,0] and all transits the same current magnitude with the
same frequency.
For some reason the total magnetic flux density normB is not symmetric around x=0. It will have a higher
peak on one of the sides. (Which side depends on which cable is the "reference" while the other are phase
shifted +-120 with respect to this).
Does anyone understand why normB is not symmetric? Any insight will be gladly appreciated.
(file attached)
Aksel
I'm using a magnetic field 2D model and a 50Hz frequency study.
I have three power-lines that transmit 3-phase currents. That is, each coil is 120[deg] phase shifted to the
other.
The power-lines are placed in [-9,0], [0,0] and [9,0] and all transits the same current magnitude with the
same frequency.
For some reason the total magnetic flux density normB is not symmetric around x=0. It will have a higher
peak on one of the sides. (Which side depends on which cable is the "reference" while the other are phase
shifted +-120 with respect to this).
Does anyone understand why normB is not symmetric? Any insight will be gladly appreciated.
(file attached)
Aksel
Attachments:
1 Reply Last Post 14 mai 2017, 17:06 UTC−4
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Posted:
8 years ago
You have other conductors besides the ones you have specified currents for. If I remove all the other conductors I get a symmetric solution for normB. I conclude that the other conductors are carrying nonzero currents.
DW Greve
DWGreve Consulting
DW Greve
DWGreve Consulting