High Speed Electrical Machines

We’re developing new solutions to achieve a step change in engine efficiency and emissions reduction.

Cutting-edge high-speed electrical machines

Through pairing high-speed electrical machines (HSEMs) with power electronics units, the possibilities for improved efficiency have grown exponentially, yet very few companies have been able to unlock this potential.

Bowman is a company with HSEMs at the heart of all we do. It’s why we’ve been researching, developing and manufacturing them for over 15 years. We’re ideally positioned to tap in to this opportunity and are one of the few organisations to have in-house knowledge of HSEMs, turbo machinery, power electronics and engine performance all in one place.

That’s why, in partnership with recognised global players, we’ve developed highly innovative products, at cost points that are viable in very competitive and capital constrained sectors.

Active projects – Electrified Turbomachinery

Whilst the automotive industry has made progress with electrified turbomachinery at the passenger vehicle scale, little has been achieved for heavy duty, on and off-highway, and industrial scale engines. The number of these engines, and their contribution to carbon emissions and general pollution, is significant. We’re seeking to change this.

Through combining high speed electrical machines with turbochargers or simply compressors to create electrified turbomachinery, it is possible for these users to not be left behind.  Electric compressors rapidly provide engines with the air needed for combustion – much more quickly than the air coming from the turbocharger, which means acceleration can be achieved with much less fuel, and very high transient emissions during load changes are mitigated.  Electric turbochargers combine the waste heat recovery benefits of electric turbo-compounding with the almost instantaneous boost pressure availability you have with an electric compressor.

We are the contracted electrification partner for a major global engine OEM and turbocharger manufacturer, with a view to creating electric compressors and turbochargers. Feasibility studies have been completed and development work is now underway.

For more information on these forthcoming projects, or to partner with us on other HSEM developments, get in touch.

Our capabilities

Combining HSEMs with power electronics, requires a considerable engineering resource with expert knowledge, especially in order to drive down the cost of any new technology. Through multiple product development projects, and refining our ETC technology for three generations, we’ve become experts in this process.

Our world class engineering team has developed several HSEMs and associated machinery, including:

  • High-speed micro gas turbine generators
  • Concentrated solar power turbines
  • Active magnetic bearing gas turbines
  • Organic rankine cycle turbogenerators
  • Digital engine control systems
  • Engineering processes and controls
  • Retrofitted designs of turbine rotor and nozzle
  • Associated circuit boards, software and systems
  • Three generations of our Electric Turbo Compounding system (ETC)
  • Additional projects under non-disclosure agreements

To find out more, contact us.

Project in focus – Wärtsilä

Wärtsilä is a global provider of power solutions for the power industry, and marine, gas and oil sectors, with customers in over 170 countries. Following a successful trial in 2011, we were tasked with creating a bespoke solution for a 9MW Wärtsilä 34SG engine, in a Wärtsilä operated power plant.

We designed a bespoke high-speed electrical machine in which the ETC system was housed within a frame and connected via a valve system to the engine. As a result of these projects, we generated 1.5% additional free power and accelerated payback on the entire power plant project, all with zero impact on engine reliability.

Further information on this project can be found in our full case study.