EMI case history of a ventilating system for combat tank application

An EMI case history of a ventilating system intended for combat tank application shall be described in this paper. The basic configuration of the system comprises of various protections needed to the crew against nuclear biological and chemical nature of contaminations. The EMI problems encountered in the sensors, the control circuit and a special blower system (for the ventilation of crew compartment) with rest of electronic subsystems are identified. Necessary EMI hardening techniques were applied and completely EMI hardened ventilating system is realized. The system has passed both subsystem level tests and final EMC evaluation tests in the combat tank. It is an unique configuration meeting both electrical and EMC requirements.