This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
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
Getting Started with Current Sensing Video Training Series
TI makes no warranties and assumes no liability for applications assistance or customer product design. You are fully responsible for all design decisions and engineering with regard to your products, including decisions relating to application of TI products. By providing technical information, TI does not intend to offer or provide engineering services or advice concerning your designs.
We are glad that we were able to resolve this issue, and will now proceed to close this thread.
If you have further questions related to this thread, you may click "Ask a related question" below. The newly created question will be automatically linked to this question.
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
All information in this correspondence and in any related correspondence is provided “as is” and “with all faults”, and it is subject to TI’s Important Notice (http://www.ti.com/corp/docs/legal/important-notice.shtml).
In reply to Javier Contreras4:
In reply to jie qian:
Taken offline for confidentiality of design.
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.