Pulse or digital communications – Cable systems and components
Reexamination Certificate
2001-09-17
2008-08-19
Wang, Ted (Department: 2611)
Pulse or digital communications
Cable systems and components
C375S256000, C375S361000, C361S062000, C363S021070
Reexamination Certificate
active
07415072
ABSTRACT:
The invention relates to a drive control for an electric drive with a secure electrical separation of power element and control element. The aim of the invention is to reduce the number of components such as optic couplers and buffer amplifiers between the power element and a control electronics. To this end, a suitable electrical transformer (U) is inserted in a digital communication interface (K) between the control unit (R) and the control electronics (A) for the purpose of providing a secure electrical separation. To make use of a transformer (U) possible, a non-zero frequency encoding, for example a Manchester encoding, is carried out. Alternatively, an Ethernet physics can be used to provide a suitable communication interface. The transformer electrically insulates the two communication paths from each other that are provided in an Ethernet physics and preferably has little coupling capacity and a low attenuation factor.
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Biswas S K et al.: “Gate Drive Methods for Igbts in Bridge Configurations” Conference Record of the Industry Applications Conference. Denver Oct. 2-5, 1994, vol. 2 Conf. 29, Oct. 2, 1994, pp. 1310-1316, XP000512513 ISBN: 0-7803-1994-X, figures 2,3.
Gaksch Susanne
Göpfrich Kurt
Heidrich Peter
Imrich Franz
Jänicke Peter
Day Ursula B.
Feiereisen Henry M.
Siemens Aktiengesellschaft
Wang Ted
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