Small-scale turbo compressors for more efficient take-off/landing and cruise of future aircraft

08. November 2018

Airplanes play an important role in today’s worldwide transportation system. To handle the growing weight of freight and number of passengers, the plane size must increase while existing runways often cannot be extended. At the same time, there are increasing demands for reducing noise and increasing efficiency due to CO2 emissions and global warming. Prof. Zha and his team from the University of Miami conduct research in the area of active flow control concepts for ultra-high lift coefficient, the so-called Super-Lift condition, by energizing the boundary layer of airfoils. This principle allows for short take-off and landings, and enables drag reduction during cruise and, therefore, lower fuel consumption during long distance flights. The key technology providing this Super-Lift is an ultra-compact turbo compressor, which Celeroton has realized prototypes for wind tunnel testing.

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Multi-stage control and operation of miniaturized gas bearing turbo compressors in gas separation plants

07. November 2018

For efficient production and for avoiding long transport distances, one of Celeroton’s customer, operates gas separation plants directly at its clients’ sites. These plants typically use turbo compressors with several 100 kW electrical power. To optimize these plants and to improve gas separation methods, pilot plants are operated in a laboratory environment. In these pilot plants, miniaturized turbo compressors with air bearings are needed in order to obtain comparable results to the large scale production plants. Two Celeroton turbo compressors with air bearings are connected in series to achieve the required pressure levels.

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Application example: Towards optical switches based on high-speed magnetic bearing motor CM-AMB-400

06. February 2018

A number of emerging applications ask for a dramatically improved performance of femtosecond laser systems concerning pulse energy. Due to limitations in the amplifier medium, further improvements within the laser source are increasingly challenging. Stacking of multiple amplified pulses via methods such as Stack-and-Dump seems to be a possible solution. To extract these high-energy pulses, a fast, efficient, minimal-invasive switch is necessary. State of the art switches make use of electro-optic or acousto-optic effects but their transmissive nature limits the achievable energy due to nonlinear effects or overheating. Finding a suitable switch remains a puzzling task and only recently a promising new approach employing small fast rotating mirrors as a dumping device in order to extract energy from the cavity was theoretically proposed and thoroughly described. Such fast rotating mirrors could be driven by the magnetic bearing motors such as the CM-AMB-400. As first step towards such an optical switch based on the CM-AMB-400, measurements of velocity and pointing stability have been undertaken and are outlined in the following article.

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Energy saving potential with oil-free turbo compressors in fuel cell systems

06. November 2017

Due to their compact design and high efficiency, oil-free electrical turbo compressors are ideally suited for mobile fuel cell systems, e.g. in vehicles and thus have great energy saving potential compared to standard compressors. This article presents a comparison with other compressor technologies and the potential for improvement in converter topology.

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Model-based control of an electrical compressor to increase low-end torque and its impact to fulfil “real drive emissions” of diesel engines

03. November 2017

Additional electrical compressors have long been considered to enhance response behavior of engines. In combination with appropriate software and motor parametrization, an additional compressor can also reduce pollutant emission. Robert Bosch GmbH works on the development of the required software and components for the use of an electrical turbo compressor for diesel engines. Bosch has successfully tested, combined with the respective control, the Celeroton turbo compressor CT-14-1000 in a diesel motor test rig.

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Celebrating our 10-year anniversary

Fast, faster, Celeroton! A retrospect of the last ten years.

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New 7.5 kW fuel cell converter

Upgrade: Our new fuel cell converter CC-550-7500 offers even more power. Through continuing development of the ...

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