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Part Number: DRV401
i found a big problem, the precision of the current sensor with DRV401 was influenced by the position of the busbar.
normaly, the current on busbar was 350A, and the output of sensor with DRV401 was 350A, but if i move the busbar closel to the probe coils, the output of DRV401 will jump to 360A.
and what factors will lead to this problem? and can you have any sugestions to avoid or reduce the this influence ?
Patrick Simmons, TI Sensing Products Applications Support
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Hello Jie Qian,
Thank you for using the forum to get your questions answered.
I understand what is happening. The bus bar is directly coupling into the probe instead of through the compensation core. There are a few ways to deal with this situation.
You can simulate these effects and see the improvements in your simulations. All you would have to do in your simulation is apply a current on bus bar and a negative current / #windings on your compensation coil. The amount you see flux you see at the probe location is the difference of the coupling. If you change any of the suggestions above you will see an improvement.
Javier Contreras, TI Sensing Products Applications Support
In reply to Javier Contreras4:
In reply to jie qian:
Taken offline for confidentiality of design.
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