Piller Gmbh

Piller Group Gmbh

Joachim Huntgeburth

Norbert Ueffing

Thomas Benke

Heinrich Von Sothen

In an UPS system, following components are arranged in a machine cabinet: an AC-to-DC converter connected to a DC voltage link on its output side, a DC-to-AC converter connected to the DC voltage link on its input side; a motor/generator electrically connected to the DC voltage link and having a flywheel coupled to its rotor; a bypass to the AC-to-DC converter and the DC-to-AC converter connected in series, a bypass switch being arranged in the bypass; a controller; and a blower which draws air out of the surroundings through air filters, blows the air in the machine cabinet through a heat exchanger, and ejects the air again. The heat exchanger is arranged in a coolant circuit together with a coolant pump, cooling bodies for the power output stages, and coolant channels which include stator channels running through a stator of the motor/generator.

Online UPS system with combined air and water cooling

In order to improve upon a take-up device for a line comprising a frame on which a take-up drum for the line is mounted so as to be rotatable about an axis, and a rotary coupling between a line terminal fixed to the frame and a line terminal fixed to the take-up drum, in such manner that as reliable as possible a rotary coupling is provided, it is proposed that the rotary coupling comprises a first auxiliary drum which co-rotates with the take-up drum and a second auxiliary drum which is fixed relative to the frame, that the rotary coupling comprises a rotating element which is rotatable about the rotation axis at a lower speed than the first auxiliary drum, and that the rotary coupling comprises a connection line which can be wound onto or unwound from the first auxiliary drum, passes from the first auxiliary drum to the rotating element in a first strand and passes from the rotating element to the second auxiliary drum in a second strand, and can be unwound from or wound onto said second auxiliary drum.

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Duderstadt, Germany

Joachim Huntgeburth