Low Cost Development Strategy for Pre-Compliance Electromagnetic Compatibility (EMC) Tests with a Transverse Electromagnetic (TEM) Cell

During development of electronic products, several measurements are performed to ensure the electromagnetic disturbances are in such levels permitted by costumer requirements. Normally these tests are performed in certified laboratories. This usually causes high impact on timing plan and development costs. In order to reduce the time and cost involved on pre-compliance EMC tests, a Transverse Electromagnetic (TEM) cell was used as a tool for fast analysis of proposed design solutions during development of a brushless motor controller. The TEM was used as an Antenna to measure the electromagnetic disturbances (magnetic field) generated by the EUT (Equipment Under Test). A mathematical correlation between the voltage measured using the Antenna (TEM) and results found in a Certified Laboratory are compared and presented.