Transcutaneous Energy Transmission System for a Totally Implantable Artificial Heart Measurement and Evaluation of Electromagnetic Disturbance

• Published in: Jinko Zoki Vol. 29; no. 1; pp. 18 - 23
• Main Authors: Matsubara, H, Shiba, K, Koshiji, K, Fujiwara, O, Nakamura, Y, Tatsumi, E, Taenaka, Y, Takano, H
• Format: Journal Article
• Language: Japanese
• Published: JAPANESE SOCIETY FOR ARTIFICIAL ORGANS 2000
• Subjects: artificial heart; conducted emissions; energy transmission; radiated emissions; regulation of VDE-0871
• ISSN: 0300-0818; 1883-6097
• DOI: 10.11392/jsao1972.29.18

This paper reports on the measurement and evaluation of electromagnetic disturbance for a transcutaneous energy transmission system. Radiated emissions from two types of transcutaneous transformers, referred to as coreless and externally coupled, respectively, were measured by a probe for near magnetic field, and these measured near magnetic fields were converted into electromagnetic fields according to a regulation of VDE-0871. The coreless transformer showed radiated emissions of 71.0d BμV/m, while the emissions of the externally coupled transformer were 53.4d BμV/m, the former emission exceeded the regulation of VDE-0871 by 0.9d BμV/m. The radiated emissions from the latter with a current resonance-type inverter were suppressed by 13.8d BμV/m at the third harmonic wave and by 11.8d BμV/m at the fifth harmonic wave compared with the non-resonance-type inverter. Although the conducted emissions from each of the two transformers were suppressed by using the noise filter and the ferrite beads, the emissions from the coreless transformer exceeded the regulation of VDE-0871 by 17.4d BμV at the fundamental wave, and were increased at frequencies larger than 10MHz by off-resonance caused by body motion. It is concluded that the externally coupled transcutaneous energy transmission system performs well in terms of electromagnetic compatibility.