ActiveField Technology

Shielded Conductor Examination

Please find the archived Conductor.doc file in the ActiveField\Conductor folder.

Time-Harmonic Magnetic problem of a shielded conductor is examined. Copper conductor with round cross-section 2 mm diameter is placed to the origin of coordinates. It carries electric current with variable frequency and amplitude, but as a default we will assume 50 Hz and total current 100 Amperes.

Cylindrical shield with internal radius 4 mm surrounds the conductor. We will analyze dependence of the electric field parameters from the shield thickness in the range 0.5 mm to 5.5 mm, and its material electrical conductivity and magnetic permeability.


Shielded Conductor Examination Cylindrical shield with surrounds the conductor. Analyze dependence of the electric field parameters from the shield thickness Shield Conductor Air Air Tester L

We will also compare results for shield with short-circuited ends (zero voltage), open ends (zero total current) and without shield. To measure the field characteristics we will use the tester - steel rod with 1 mm radius. Distance between the centers of tester and conductor is 12 mm.

This sample demonstrate how to use QuickField calculation from within the Microsoft Word environment. Please find the Conductor.doc file and open it with Microsoft Word. If asked please choose Enable Macros to be able to run the embedded program.

The Conductor.doc is a self-descriptive document. Please open the document, read the introductory chapter, fill in the tables with geometrical and physical parameters, press the Solve button and observe the calculation results.

A final chapter tell how to use Microsoft Graph object model to obtain charts.

Caution: The macro script embedded in the document relies upon its structure. So, be careful if you decide to change the document in some way. Particularly, you should not change the number of rows and columns in the tables and the order that tables and figures appear in the document.