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Small-scale hydrogen liquefaction enabled by Celeroton turbomachinery

Discover how Celeroton’s gas-bearing turbomachinery enables compact, oil-free and energy-efficient cooling at 20 K. The CryoLH2 project lays the foundation for small-scale hydrogen liquefaction, Zero Boil-Off systems and other cryogenic applications using modular Reverse Turbo-Brayton cryocoolers.

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Efficient aeration with oil-free turbo compressors

Turbo compressors achieve significantly higher efficiency than screw compressors, rotary lobe blowers, and side-channel compressors; however, until now, they have not been technically available for lower capacity ranges. Celeroton’s gas bearing technology closes this gap with oil-free, contactless, high-speed compressors.

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Mechanical Vapor Recompression (MVR): How turbo compressors push the industrial energy transition

MVR systems can reduce energy consumption in industrial processes with high demands for process heat and steam by up to 90%, making them a key technology for reducing industrial CO₂ emissions. However, their full potential can only be realized with the right compressor technology. Gas-bearing turbo compressors from Celeroton set new standards for efficiency and robustness.

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Air as a refrigerant: Technology, opportunities, and limitations

Air, as a natural refrigerant, is attracting renewed attention in the wake of stricter climate protection requirements. Its major advantage lies in its environmental compatibility: air has no global warming potential (GWP ≈ 0), is non-toxic, non-flammable, and available worldwide. This eliminates many of the regulatory risks associated with other refrigerants.

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Advanced turbo machinery for cryogenic applications

As demand for high-performance cryogenic systems continues to grow, the requirements placed on cryogenic machinery are becoming increasingly challenging. High efficiency, low vibration levels, contamination-free operation and long service life are critical factors for reliable operation at temperatures down to 20 K and below.

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New high-speed frequency converter for permanent magnet synchronous machine (PMSM) and brushless DC (BLDC)

High-speed electric drives are becoming increasingly important in modern industrial and scientific applications—from turbo compressors and blowers to turbo expanders and high-speed spindles. To meet these demanding requirements, Celeroton has completely overhauled the frequency converter CC-230-3500.

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Oil-free helium recirculation as the key to precise isotope enrichment

Isotopes play a central role in the semiconductor industry, in renewable energies, medical diagnostics and research, and other markets. The enrichment of these isotopes is based on the circulation of high-purity carrier gases such as helium. Stable process conditions, maximum purity, and maximum availability of the systems used are essential.

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Product Launch: Gas-Bearing Turbo Compressors for H₂ and O₂ Applications

Celeroton introduces the CT-1011-H2 and CT-1011-O₂, two gas-bearing high-speed turbo compressors designed for demanding process-gas applications. Based on a shared design platform, both systems combine compact dimensions, high power density, and fully oil-free operation.

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Nanospectroscopy with Magnetically Levitated Choppers – The CM-AMB in Focus

Nanospectroscopy enables the analysis of materials and biological structures with nanometer-scale resolution. By probing photon or electron interactions, researchers can gain insights into both structural and dynamic properties at the atomic level. Learn more about the advantages of our chopper systems in nanospectroscopy.

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New product launch: Gas-bearing turbo compressor for helium recirculation

Celeroton proudly introduces the CT-3010-He, a groundbreaking gas bearing turbo compressor designed specifically for helium recirculation in demanding applications. Combining optimized aerodynamic design, cutting-edge gas bearing technology and highest efficiency, this compressor sets a new benchmark for high-speed, oil-, contamination- and vibration-free helium circulation.

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Turbulent flow

Turbulent calculation models for gas bearings enable compressors to operate at high inlet pressures

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New product launch: Gas booster with gas bearings for demanding industrial and energy applications

We are excited to announce the launch of our latest innovation: the CT-6000-Ar, a high-performance gas booster designed for high inlet pressures of up to 190 bara, setting a new benchmark in the field of gas bearing turbo compressor technology. The first compressor worldwide operating with gas bearings at inlet pressures above 150 bara.

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Exhaust gas recirculation for hydrogen combustion engines (H₂-ICE)

Opportunities and challenges of a proven concept in a new application. Climate-neutral mobility is at the heart of the global energy and transportation transition. Hydrogen is seen as one of the energy carriers. In addition to the fuel cell, the hydrogen combustion engine (hydrogen internal combustion engine, H₂-ICE) is also moving back into the focus of the industry.

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Celeroton chopper for crystallography

Have you ever wondered how our choppers can support time-resolved macromolecular crystallography (MX)? Learn more about the two operation modes available which allow to synchronize the pattern of our chopper to the equipment of the end station of your beamline.

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Announcement Celeroton TurboCell

We are pleased to inform you about the foundation of Celeroton TurboCell AG which is taking over all air compressor for fuel cell activities and products from Celeroton AG.

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Cryogenics – A customer experience

Cryogenic applications present formidable challenges due to demanding operating requirements, including a wide range of ambient conditions and extremely low temperatures. Celeroton's proprietary gas bearing design tools enable the development of unique solutions focused on minimizing losses in the gas bearings at cryogenic temperatures.

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Turbo compressor vs. side channel blower

In the world of compressor technology, there are various approaches to compressing gases. The most common options are the turbo compressor and the side channel blower. In this article, you will find out what advantages the turbo compressor has over the side channel blower.

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Integrating a compressor system

Piping, cabling, equipment, control, cooling connection: Simply explained using three typical areas of application for our products: Mobile application, stationary industrial application and test bench.

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Stable gas bearings

Celeroton considers the required operating range of its gas bearings in an early phase of the system design and thereby trial-and-error design loops. This allows for fast time to market in customized systems. Furthermore, Celeroton validates the gas bearing stability in serial production. Therefore, at Celeroton, each compressor comes with a gas bearing quality control.

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15 years – this is how long Celeroton AG has been around!

To celebrate this great event, we met with our families at the Juckerhof in Seegräben and spent a wonderful afternoon/evening. We share with you a few impressions of our celebration and take you on a short time travel through the last 15 years.

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Celeroton solutions for light commercial vehicles

Hydrogen and fuel cells are considered key pillars of the energy transition. Among the various fuel cell applications, light commercial vehicles are particularly attractive because of the typical ranges and weight constraints required. Celeroton’s recently launched CT-/CC-2000 is a novel turbo compressor system, which is particularly suited for this vehicle segment and is especially efficient and reliable.

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Cooling of a pixel tracker using gaseous helium

Cooling pixel detectors in experimental particle physics with helium requires the oil-free recirculation of the rare gas. The concept presented in the following paper is not limited to pixel detector applications and can be used to cool any surface with respective heat-densities, only limited by shaping the helium gas flow with the turbo compressor CT-1050-He.

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Vibration resistance of air bearing turbo compressors

An important aspect in mobile fuel cell applications is the vibration resistance, with vibration requirements up to 20 g in automotive applications. Read more in the paper how air bearing radial turbo (also called centrifugal) compressors are designed for this and see in a video how turbo compressors from Celeroton handle this requirement.

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High-speed magnetic bearing chopper for infrared nanospectroscopy

Infrared (IR) nanospectroscopy is a non-destructive method for the analysis of molecular structures below the wavelength scale. It is used in a broad range of research applications spanning from biochemistry to geology. A magnetic bearing chopper is a core component to bring this IR method to the next level of spatial resolution. It provides the beam chopping functionality in vacuum, at high frequency and with very low jitter.

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New Turbo Compressor System CT-2000 / CC-2000

Developed for fuel cell air supply with a net output of 30 to 60 kW, the new turbo compressor system offers an outstanding power-to-weight ratio with values for air mass flow and pressure ratio that have been increased once again compared its predecessor. The maximum speed has also been increased, enabling a further reduction in installation space with a simultaneous increase in efficiency.

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Demonstration of magnetic bearing chopper operation

The magnetic bearing motor CM-AMB-400 with a chopper rotor is demonstrated in the video below. A laser beam (generated by a FP-Mini-520 from Laser Components) is cropped by a precision pinhole with an opening of 500 µm, then passes through the chopper and detected by a photodiode (ODD-1WB by Opto Diode). The current of the photodiode is amplified by a transimpedance amplifier and made visible with a digital oscilloscope.

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Turbo compressors for operation at high-altitude

How nice it would be to drive a fuel cell vehicle through the mountains and over a pass emission-free and to enjoy the scenery? This is now possible with Celeroton's CT-2X series of turbo compressors with gas bearings!

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Novel high-speed turbo compressor with integrated inverter for fuel cell air supply

Fuel cell technology is continuously gaining ground in E-mobility applications. Fuel cells require a constant supply of pressurized air, for which high-speed turbo compressors with air bearings are an optimal choice to reduce size, guarantee oil-free operation required for the lifetime of the fuel cell, and increase efficiency.

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Quo vadis?

The Horizon 2020 SME Instrument programme aims to help innovative SMEs with strong growth potential in international markets.

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Vibration testing of the CT-2X air-bearing turbo compressor for mobile fuel cell applications

Fuel cell technology is continuously gaining ground in E-mobility applications. Fuel cells require a constant supply of pressurized air, for which high-speed turbo compressors with air bearings are an optimal choice to reduce size, guarantee oil-free operation required for the lifetime of the fuel cell, and increase efficiency.

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Combining electronics and a turbo compressor in one device - the new CTi-17-700/1000.GB

Electrification in various industries, especially in mobile applications and vehicles, is more and more driven by hydrogen fuel cell systems. Celeroton’s latest achievement helps to further reduce the size of the fuel cell system and simplify the integration of the compressor into the balance of plant, and, therefore, supporting the worldwide trend.

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Advantages of Celeroton oil-free helium compressors

With its 100% oil-free and gas-tight design, the Celeroton CT-NG-2000 compressor for Helium is the ideal solution for applications requiring low-pressure helium and other inert gas recirculation.

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Turbo compressors for noble and inert gas applications

With the launch of the turbo compressor series CT-NG, Celeroton is further extending its product portfolio of ultra-high-speed, gas bearing turbo compressors with a turbo compressor specifically optimized for noble and inert gases. As a first variant of the turbo compressor series, the CT-NG-2000 is available for 100% oil-free compression of helium.

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Recirculation of noble or inert gases

Noble or inert gas recirculation is used for various processes, such as cooling of sensitive equipment in physical experiments, semiconductor production equipment, additive manufacturing or in laser sources. These applications have large differences in the required pressure ratios and mass flows.

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New CT-2X series

Celeroton presents the new CT-2X turbo compressor series with air bearings in order to meet the increased market demand for higher mass flow and pressure ratios. The CT-2X consumes the lowest available space, offers a long lifetime, oil-free operation, lowest weight and an optimized cost on the market.

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Development of an oil-free turbo compressor for mobile fuel cell applications – challenges and results

The compressor for supplying air to a fuel cell stack is a critical component in the balance of plant (BoP), especially for mobile applications. The main requirements of the compressor are the performance concerning pressure ratio, mass flow and efficiency, while having a minimal size and weight. The turbo compressor technology is ideally suited to meet these requirements.

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Highest level of tightness, lowest leakage rates of turbocompressors with gas bearings in noble gas processing

Compressor applications frequently require a high demand for tightness performance of the turbo compressor. For many reasons this feature is important to minimize and avoid risks of health, environment, fire, failure and cost. Since 100% system tightness – even using O-rings is unfeasible, the method to achieve the required minimal system tightness level is crucial.

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Celeroton receives funding from EU Horizon 2020 SME instrument phase 2 program

Celeroton was awarded a phase 2 project from the highly competitive EU Horizon 2020 SME instrument program. The grant will be used to take the last technical and commercial steps to introduce our unique turbo compressor systems as the key technology for oxygen supply in the fuel cell vehicle market.

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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 Celeroton technology, the drive power is increased from 5 to 7.5 kW while keeping the price stable.

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

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.

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

For efficient production and for avoiding long transport distances, our customer operates gas separation plants directly at it's 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. Learn more about this in the article...

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Gas bearing drive system opens up new applications for turbo compressors

Within the world of classical process applications, turbo compressors are quickly reaching their limits. The miniaturization and use of gas bearings in drive systems has paved the way for turbocharger applications where previously small diaphragm, piston or rotary compressors have been applied.

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Celeroton oil-free compressor CT-17-1000.GB in a maritime fuel cell application

Michelin Recherche et Technique beside other project partners is a technology provider for alternative propelled boats. With the project Yelo H2 a maritime demonstrator boat - with the purpose of validating hydrogen technology in maritime applications - has been built. The boat, called “Galilée”, was put into operation in October 2017 and connects the marina of the city of La Rochelle with its city center.

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

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.

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

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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Use of an electrical compressor to improve torque and transient behaviour of diesel engines

In combination with the appropriate software and motor parametrization, an additional compressor can also reduce pollutant emission. Robert Bosch GmbH 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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New reaction wheel concept

Honorable mention of the new reaction wheel concept for small satellites developed by Celeroton and researchers from ETH Zurich (Power Electronic Systems Laboratory) in the Tech Briefs Create the Future Design Contest 2017.

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Application examples of the magnetic bearing CM-AMB-400 motor for optical applications

High speed rotating elements, such as disc shaped rotors crossing a beam, infrared and X-ray choppers, are used to deflect a beam. The modular assembly of the magnetic bearing motor CM-AMB-400 allows the use of an application specific rotor. The concept of the magnetic bearing motor is such that a beam can be guided in radial or axial direction to the rotor to be deflected or chopped by the rotation.

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New Magnetic Bearing Controller with Precision Control

The new Magnetic Bearing Controller, CC-AMB-1500, is the perfect fit for Celeroton’s high-speed magnetic bearing motors. Thanks to the integration of the bearing and drive control, the compact controller is ideally suited to drive various high speed, high precision motor applications.

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Celeroton receives funding from SERI within a Horizon 2020 project

Celeroton receives funding, within the scope of the European Horizon 2020 framework programme, from the Swiss State Secretariat for Education, Research and Innovation (SERI) for the design and realisation of a gas bearing turbo compressor for use in a 100 kW fuel cell system. Volvo Car Group will integrate and test the system.

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Miniaturized, oil-free turbo compressors with gas bearings for heating and cooling applications

Oil-free, miniaturized turbo compressors with gas bearings have not been employed in industrial heating and cooling applications due to the challenges in design, manufacturing and operation. In this paper, the technical challenges due to miniaturization are described and potential solutions are elaborated.

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Turbo compressors for fuel cell vehicles

The Swiss fuel cell company Swiss Hydrogen is already using the Celeroton oil-free air bearing turbo compressor CT-17.1000.GB with converter CC-120-1000 for the air supply of a 10 kW fuel cell range extender in a Fiat 500.

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Launch of turbo compressors with gas bearings

Celeroton AG, the leading manufacturer of ultra-high-speed electrical drive systems with speeds up to 1 million rpm, launches its first turbo compressors with gas bearings – unique in their weight and performance, being wear- and oil-free, and obtaining the highest levels of energy efficiency.

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New Converter CC-230-3500

With the newly designed converter CC-230-3500 Celeroton extends its product portfolio with a highly compact, grid-connected converter with an active input-stage (PFC) and a maximal output voltage of 400 V. This is achieved at an output power of 3.5 kW and an output current of 15 Arms.

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Product Launch CM-AMB-400

With the new CM-AMB-400 Celeroton enlarges its product portfolio with the first high-speed active magnetic bearing motor for direct drive of applications with speeds up to 400,000 rpm.

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New distribution partner for Germany and Austria

Celeroton AG is proud to announce a new, strong distribution partner: MACCON GmbH. Thereby the leading manufacturer of ultra-high-speed electrical drive systems with speeds up to 1 million rpm gains a strong distribution partner for drive technologies for industrial applications as well as for aerospace in Germany and Austria and hence expands its distribution network.

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SBFI Supports Our Reaction Wheel Research Project

Lighter and low-vibration satellites are possible due to magnetic bearing technology: The Swiss State Secretariat for Education, Research and Innovation (SBFI) supports one of our research projects.

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Product Launch: Converter CC-120-1000

Confined space, low weight and often large vibrations – providing the air supply for fuel cells is a challenge for every drive system. Celeroton presents a new electronic converter, which is perfectly adapted to these harsh environments.

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Turbo Compressors Enable Lighter Satellites

For the cooling of electronics in future satellites, heat pumps might be the solution. They can be built to be more efficient, lighter and compact thanks to Celeroton’s turbo compressors. This was proven in a series of experiments with ground-breaking results.

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New Distribution Partner for Northern America

In late 2013 Celeroton established a collaboration with Berton & Berton Inc. in Salem (Massachusetts, USA). With this partner we are able to better serve our clients in the US and Canada. A short interview on the new partnership.

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Modeling and Comparison of Machine and Converter Losses for PWM and PAM in High-Speed Drives

In this paper, models are introduced for calculating the rotor, copper, and core losses of an electrical machine as well as inverter losses, taking the modulation type into account. These models are developed by considering two typical high-speed permanent-magnet synchronous motor topologies (slotted and slotless machines) driven by pulse-amplitude modulation (PAM) and pulsewidth modulation (PWM) converters.

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Low Voltage Converter CC-100-1000

Sensorless within the smallest space. Celeroton presents with the new CC-100-1000 an extremely compact converter with a power output of 1 kW and all as a single PCB solution. This new electronics allows for sensorless speed control of synchronous and asynchronous motors with rotational speeds of up to 500,000 rpm.

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Launch of Turbo Compressor CT-15-150

With the new CT-15-150, small pressure differences and mass/volume flows are now covered by ultra-high-speed turbo compressors. This provides benefits concerning volume, weight and efficiency.

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Model-Based Loss Minimization in High-Speed Motors

The trend to higher rotational speeds in drive systems possesses several challenges, one of which is the thermal constraints due to the higher loss densities in the electrical machines. In this paper, loss models are used to evaluate different converter modulation schemes as well as changes in the machine construction, in order to find a loss-optimal drive system.

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5 Years Celeroton

For five years now, we have been working full steam on innovative solutions in ultra-high-speed electrical drive systems. It is high time for a review.

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Micro-generator for ultra micro gas turbine

This micro gas turbine designed by Onera targets an electrical power generation of 55 W at a rotational speed of 840,000 rpm. Celeroton contributes a micro-generator to this project which is described in this paper in design, realization and experimental verification.

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The design of ultra-high-speed miniature centrifugal compressors

This paper describes experience in the development and application of several ultra-high-speed miniature centrifugal compressors with an impeller diameter less than 30 mm and using high speed electric motors to provide rotational speeds between 200,000 and 600,000 rpm.

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Design and control of an ultra-high speed turbo compressor for the air management of fuel cell systems

The compressor is a crucial component of the Air Management System (AMS) used in fuel cell systems. The adoption of a turbo compressor can dramatically reduce the size of the AMS, which is a basic requirement for transportation applications. In this paper, the ultra-high speed turbo compressor technology is employed in the compressor design, which results in ultracompact size and high efficiency.

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New Converter CC-75-500

Celeroton launches its new converter for sensorless control of ultra-high-speed permanent-magnet synchronous machines (PMSM) and brushless DC motors (BLDC).

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