The influence of vibrations on conducted emissions

DC Motors are important components for the automotive industry, but they're also a strong electromagnetic interference (EMI) source. Knowing this problem, conducted emission (CE) tests and Voltage Transient Emissions (VTE) tests were carried out along the power lines of the motor according to the standards CISPR 25 and 7637-2. Conducted emissions from the components which are to be placed on an automotive are measured in a perfect stable environment, although they operate in a continuous vibration environment. In this study we induced several vibrations and evaluated their effect on the conducted emissions, giving thereby an overview on how the vibrations of the vehicle influences the electromagnetic compatibility (EMC) of the components.