Close Figure Viewer. Browse All Figures Return to Figure.
Previous Figure Next Figure. Journal list menu Journal.
Log in with your society membership Log in with AGU. Email or Customer ID. Forgot password?
Career Cornerstone Center: Careers in Science, Technology, Engineering, Math and Medicine
Old Password. New Password.
Password Changed Successfully Your password has been changed. Returning user. Request Username Can't sign in? Forgot your username?
Electromagnetism: Paths to Research
Thus, possible disturbances can be estimated already during the engineering process. Apart from cost advantages, these LPITs offer significant advantages concerning the required space, dynamic range of the measurement, linearity and electric losses. Due to the different measuring principle, propagation paths and levels for electromagnetic disturbances differ from those of conventional current transformers.
Therefore, research focuses on developing appropriate test procedures in order to guarantee a reliable functioning of protective systems under the influence of all relevant disturbances, for example during switching transients or at high levels of harmonic distortion. Partial discharges PD are a phenomenon within the isolation of different assets. High DC voltage levels and fast transients of the traction inverter in electric vehicles can result in locally increased field strengths, which can promote PD.
Journal list menu
Regarding the special conditions in traction systems of electric vehicles, the measurement methods and technologies significantly differ from known and established PD measurements used for years in high voltage technologies. The measurement metrologies, the circumstances PD emerge in tractions systems are investigated as well as methods to minimize their occurrence.
Resulting measurement setups and simulations provide a risk assessment for manufacturers. The general complexity of electronic control units in vehicles will increase significantly within the next years: Due to the high safety requirements of both autonomous cars and electromobility the numbers of sensors and actuators build into the vehicle will rise. In order to ensure reliable and reproducible component level tests the soaring complexity of the measurement setup has to be incorporated into CISPR 25; a variety of different bus-signals need to be transmitted between the device under test and peripheral systems using sophisticated wiring harnesses.
Electromagnetic Forces and Fields
In this context, the challenge is to find the optimal balance between a realistic component test and an affordable test in terms of time and money. Therefore, the differences between the simultaneous measurement of all bus-signals using an entire wire harness and serialized measurements of similar bus-interfaces using a reduced harness are determined. This approach includes investigations of the influence of complex multi-signal wire harnesses and their arrangement within the CISPR setup with regard to the test reproducibility.
EMC of automotive inverters One of the main disturbance sources in the automotive sector is the inverter, used to convert the DC Batterie voltage into 3 phase AC for the motor, e. Active and passive filters Research in the area of filter technology aims to stay within the given limits of international standards or internal standards of OEMs. Inductive charging systems Inductive charging is a new challenge for EMC.