Multi-phase plasma generator
The technology comprises a multi-phase plasma device for efficient generation of a dense and homogeneously distributed cold plasma for cleaning of air and gases.
Challenge
Clean air and clean gases are of high importance for many industrial applications and processes. The purification of air with plasma can be used for germ inactivation and for cleaning of industrial exhaust air. The air to be treated is often passed through a discharge chamber, so that purification effects are achieved through a combination of plasma generation and surface discharge. In case of single-phase purification systems, a period can occur during which no plasma can ignite. Consequently, pollutants – especially at high air velocities – can pass through without plasma ignition and without any purification taking place. Generating the largest possible plasma volumes can be challenging by means of volume discharges, especially when high system stability is required in combination with high efficiency.
Our Solution
The present technology combines a novel bar electrode geometry with multi-phase high-voltage control to generate a multitude of separate discharge paths by means of a low number of electrodes. The targeted electrode arrangement enables the efficient ignition of plasma not only between a single electrode pair, but also between several adjacent bar electrodes, creating a virtually planar, dense plasma. The multi-phase control shifts the discharge paths relative to each other in time, ensuring that plasma is continuously active within the system, even though individual discharge paths are briefly extinguished at the AC voltage zero crossing.
Illustration of a multi-phase plasma generator for efficient cleaning of air and gases(image generated with Perplexity AI).
Advantages
- High plasma homogeneity and density
- Area scaling with few electrodes
- Continuous effective plasma operation
- Improved efficiency and power utilization
- Good compatibility with cold plasma processes
- Aerodynamic flow control
- Scalable actuator arrays
- Saving of designed and constructed space
Applications
- Air cleaning
- Exhaust gas treatment
- Pathogen inactivation
Development Status
The technology has been experimentally tested. Prototype available.
Patent Status
European patent application filed.
Patent holder: University of Applied Sciences and Arts Hildesheim/Holzminden/ Göttingen (Germany)
Contact
Dr. Mirza Mackovic
Patent & Innovation Manager Technology
E-Mail: Diese E-Mail-Adresse ist vor Spambots geschützt! Zur Anzeige muss JavaScript eingeschaltet sein!
Tel.: +49 551 30724 153
Reference: CPA-2660-HAWK
Published: January 14, 2026.
