Today wireless or contact less data transmission systems such as GSM, UMTS, Bluetooth and WLAN are omnipresent. However, most applications in use today are either connected to the power supply via plug and socket, or are supplied with batteries or fuel cells. Therefore, contact less inductive energy transmission technology has been developed over the last few years offering another possibility. Typical applications are assembly robots, machine tools, elevators, linear movable systems and non-contact battery chargers for electric vehicles. By means of the contact less transmission technology, conductor rails, sliding contacts, trailing cables or slip rings can be eliminated. The maintenance as well as the safety and reliability of the energy supply as a result of abandoning any mechanical contact can be reduced. Other advantages are: no wear and tear on the electrical contacts, no contact resistance, no spark formation and no non-protected voltage-carrying contacts. The efficiency of the magnetic assembly can be considerably improved and the size and weight can be reduced by using higher transmission frequencies in the range of several hundred kilohertz. The static and dynamic of contact less energy transmission systems can be described by the T - equivalent circuit of a transformer. The inductances can be calculated by the magnetic field simulation. Contact less transmission systems are characterised by a small main inductance and large leakage inductances. The transfer of appreciable electric power requires the compensation of the leakage inductances by resonance capacity placed in series or parallel to the primary and the secondary coil. In consequence, the primary feeding converter can work in a resonant switching mode which enables higher transmission frequencies (greater than 100 kHz). The advantage of this technology is to obviate conductor rails, sliding contacts, trailing cables or slip rings. The maintenance can be reduced and the safety and reliability of the energy supply as a result of abandoning any mechanical contact can be improved. Other advantages are: no wear and tear on the electrical contacts, no contact resistance, no spark formation and no non-protected voltage-carrying contacts. Many applications need the integration of a wireless data transfer so the primary and secondary side can communicate. This communication can be realised by usual technologies or by inductive data transmission. By using inductive data transmission the interferences can be minimised which increases the safety. A new application field for contact less inductive energy transmission is the power supply of auxiliary circuits in automobiles. The benefits for the customer are an increase in reliability and flexibility, no wiring in problematic areas and robustness against mechanical vibrations.


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    Titel :

    Wireless inductive energy and data transmission in automotive applications


    Weitere Titelangaben:

    Drahtlose induktive Übertragung von Energie und Daten für fahrzeugtechnische Anwendungen


    Beteiligte:


    Erscheinungsdatum :

    2007


    Format / Umfang :

    10 Seiten, 28 Bilder, 7 Quellen


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Datenträger


    Sprache :

    Englisch




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