Dielectric Barrier Discharge (DBD) is a specific type of electrical discharge generated by applying an AC voltage across two electrodes separated by an insulating dielectric material. The dielectric acts as a capacitor, storing electrical charge. Common dielectric materials include glass, alumina, and polymer films, though water or electrolyte solutions can also serve this function.
The dielectric barrier limits the current, preventing the formation of a thermal arc (spark). This non-equilibrium discharge is often referred to as a "silent discharge." During operation, a characteristic violet glow (plasma) is visible in the discharge gap.
Charge accumulates on the dielectric surface during each half-cycle of the AC voltage, creating an opposing electric field. When the polarity of the applied voltage reverses, this accumulated charge allows the discharge to ignite at a lower voltage than the initial breakdown threshold. This mechanism enables a continuous and energy-efficient discharge process.
Applications of DBD include ozone generators, plasma display panels (PDPs), excimer lamps, and exhaust gas treatment (decomposition of NOx and SOx). Research is also advancing in aerodynamics, specifically regarding DBD Plasma Actuators (DBD-PA) for active flow control.
Matsusada Precision offers a wide range of high-voltage power supplies and amplifiers capable of providing the AC or pulsed outputs required for dielectric barrier discharge applications.
Our high-voltage power supplies are used in the development of dielectric barrier discharge (DBD) plasma actuators.
- Related Terms:
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- Dielectric Barrier Discharge Plasma Actuator (DBD-PA)
- Electrode
- Insulator
- Discharge
- Pulse
Recommended products
Matsusada Precision offers a range of products, including high-voltage amplifiers, that provide the AC or pulsed outputs required for dielectric barrier discharge applications.
