Grounding and Shielding, High Voltage Automotive Systems and Electric & Hybrid Vehicles - Seminar

Dr. James Gover

Professor of Electrical Engineering

Kettering University

Seminar Outline:

I. Introduction: What Is Being Shielded and Grounded?

II. Electric Field and Magnetic Field Cross-Talk Between Electrical Circuits

III. Shielding Phenomena

a. Mathematical Description of TEM Wave

b. Reflection and Transmission of TEM Wave by Shield

c. Transmission of Step Function Magnetic Field in Shield

d. Transmission of Steady-State Sinusoidal Field in Shield

e. How to Determine If Noise Is Due to Electric Field Cross-Talk or Magnetic Field Cros-Talk.

f. How Shielding Can Eliminate Electric Field Cross-Talk

IV. Grounding Phenomena

a. How Sharing a Common Ground Can Affect Circuit Behavior

b. Where Should a Ground Be Located?

c. Feedback From Amplifier Output to Input by Shielded Box

d. Experimental Comparisons of Magnetic Field Coupling Into Circuits With Various Grounding Configurations.