Woehner Gmbh & Co. Kg Elektrotechnische Systeme

Daniel Steiner

Philipp Steinberger

Joram Masel

Hubert Lenker

Christopher Curth

Hans-Juergen Henning

Device for operating an electric motor, comprising a detection unit for detecting zero-crossings and phase angles of applied phase-shifted sinusoidal voltage phases of a multi-phase power supply network; and a switching unit for connecting half-waves of the applied sinusoidal voltage phases through by means of semiconductor switches in accordance with switching patterns applied to the semiconductor switches, said patterns being synchronised with the detected phase angles and zero-crossings, to generate phase-shifted quasi-sinusoidal voltage phases which are applied directly to the electric motor.

Method and device for operating an electric motor

Fuse load-break switch () for low-voltage high-power fuses, a fuse contact pair for receiving a fuse (A,B,C) being provided within a housing () of the fuse load-break switch () for each current phase to be disconnected, characterized in that a thermal power loss brought about by the fuses (A,B,C) is dissipated into at least one heat dissipation duct () provided laterally on the housing () of the fuse load-break switch ().

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Mengersgereuth-Haemmern, Germany

Daniel Steiner