Alternate methods for transfer impedance measurements of shielded HV cables and HV cable connector systems for EV and HEV
The commonly used Transfer Impedance, ZT, measurement methods for shielded cables and connectors for high voltage applications in Electric and Hybrid Electric Vehicles might be difficult to handle and reproducibility might be low. Alternative methods to measure ZT are required. In this article, the methods, Ground Plate Method and Capacitive Voltage Probe Method are introduced. The methods do not require special setups and can handle even large cable connector systems. Performance has been investigated by comparisons to ZT measurements using well established methods, i.e. Triaxial and Line Injection Method. Performance and limitations of the proposed methods for both cable and cable connector systems are discussed. Measurement results were compared to analytical formulas for ZT. It could have been shown that accuracy of proposed, easier to apply and more flexible alternative methods is in the same range as Triaxial and Line Injection Method. (c) 2016 Wiley Periodicals, Inc. Int J RF and Microwave CAE, 2016.