Electrical design transitioned from asynchronous technology to a synchronous generator with active rectification.
Harmonisation with 48-volt storage technology completed.
What has become established as the standard in the lower power range of solar and wind energy technology for many years can now be enhanced in future with our generator modules for back-up and off-grid solutions: this involves adaptation to 48-volt storage technology, which is now being used successfully in many buildings and technical facilities. With a continuous charging current of 100 amps, we are thereby closing a supply gap left by volatile generation sources such as PV and wind, which cannot be reliably bridged even with high storage capacity. Upon analysing the enquiries we receive, we recognise a clear trend towards direct current technology; for this reason, we will in future reserve asynchronous solutions – which tend to be unpopular with grid operators – solely for specific applications and will recommend grid connections in favour of established inverter technology.
Highly innovative: active rectification and power modulation
With the new Gen500T-sync generator module, we are expanding the previous power range from 20 A (Gen70xx series) to 100 A (Gen500T-sync). Both generator sizes are characterised by the highly efficient active rectification of the generator’s three-phase current, which avoids significant losses with an overall efficiency – measured from the generator’s mechanical input power to the DC output power – of more than 92 per cent. Apart from a significant reduction in overall mass, PME generator technology offers simple yet highly effective power control. Speed control allows for power modulation of up to one-third of the rated power, accompanied by a corresponding change in thermal power consumption. In this way, the generator module can be adjusted to the respective heat output of the heat source to achieve the highest possible overall efficiency.
Equipped for the future: use of renewable heat sources
The generator modules not only offer low-maintenance, lubricant-free continuous operation; thanks to their open heat transfer interface, they can also be flexibly utilised with a range of renewable fuels. Typical examples include heat from thermal batteries, flue gases from wood or biogas combustion, or new fuels such as ammonia, ethanol or flare gases. Some of these have now been sufficiently tested to ensure reliable operation on our test benches and at customers’ sites. “Unlike internal combustion engines, the pressure-tight enclosure of our generators prevents both the fuel and the flue gas from entering the interior of the machine. This eliminates the need for high-quality fuel, which significantly broadens the range of applications. Heat from heating systems is particularly attractive to our customers, as it is mainly available at times when PV output is low” says Josef Frauscher, the company’s managing director.
St. Marienkirchen, August 2026
© Frauscher Motors GmbH
Image: Frauscher Motors GmbH