Analysing DBD plasma lamp intensity versus power consumption using a push-pull pulsed power supply

In this paper characteristic of a DBD (Dielectric Barrier Discharge) plasma lamp is investigated based on the lamp intensity and power consumption. A pulsed power supply with controllable parameters based on a push-pull converter is developed for lamp excitation at different voltage levels and repetition rate. The experimentations were conducted for 28 different operating points with the frequency range of 2 kHz to 15 Khz at output voltage levels of between 7.4 kV up to 13 kV. The obtained results show the feasibility of finding an optimum operation point due to nonlinear behaviour of the DBD lamp.

Effect of pulsed power on particle matter in diesel engine exhaust using a DBD plasma reactor

Nonthermal plasma (NTP) treatment of exhaust gas is a promising technology for both nitrogen oxides (NOX) and particulate matter (PM) reduction by introducing plasma into the exhaust gases. This paper considers the effect of NTP on PM mass reduction, PM size distribution, and PM removal efficiency. The experiments are performed on real exhaust gases from a diesel engine. The NTP is generated by applying high-voltage pulses using a pulsed power supply across a dielectric barrier discharge (DBD) reactor. The effects of the applied high-voltage pulses up to 19.44 kVpp with repetition rate of 10 kHz are investigated. In this paper, it is shown that the PM removal and PM size distribution need to be considered both together, as it is possible to achieve high PM removal efficiency with undesirable increase in the number of small particles. Regarding these two important factors, in this paper, 17 kVpp voltage level is determined to be an optimum point for the given configuration. Moreover, particles deposition on the surface of the DBD reactor is found to be a significant phenomenon, which should be considered in all plasma PM removal tests.

A class E resonant inverter for use as electronic fluorescent lamp ballast

Class E Resonant Inverters are theoretically capable of delivering any power to a load and achieve 100% efficiency at any frequency of operation. In practice efficiency in the “high 90's” can be achieved into megahertz frequencies regardless of inverter output powers. The topology also allows the manipulation of output power through sub-optimal operation, with a negligible efficiency penalty. The 24W inverter discussed in this paper was specifically designed to harness the benefits, and discuss the shortcomings, of the Class E topology for use in the growing market for portable, battery powered lighting. It exhibits a peak recorded power efficiently of over 98%, and a conservatively measured efficiency of 95% across a range of dimming settings.

Hanukkah lamp from Italy Coin

Obverse: 1 Lira silver coin. Reverse: Hanukkah lamp from Italy.

Hanukkah lamp from North Africa Coin

Obverse: Silver 1 Lira coin. Reverse: Hanukkah lamp from North Africa

Hanukkah lamp from Babylon Coin

Silver 5 Lirot coin. Obverse: Number 5. Reverse: Hanukkah lamp from Babylon.

Hanukkah lamp from Russia Coin

Silver 5 Lirot coin. Obverse: 5 Lirot, emblem of the state of Israel. Reverse: Russian Hanukkah lamp.

Hanukkah lamp from Damascus Coin

Obverse: 10 Lirot silver coin. Reverse: Hanukkah lamp from Damascus, 18th century.

Hanukkah lamp from Damascus Coin

Obverse:10 Lirot silver coin. Reverse: Hanukkah lamp from Damascus, 18th century.

Hanukkah lamp from Holland Coin

Obverse: 10 Lirot silver coin, flower motifs on the sides. Reverse: Hanukkah lamp from Holland.

Hanukkah lamp from Corfu Coin

Obverse: 1 Sheqel silver coin, emblem of the State of Israel. Reverse: Hanukkah lamp from Corfu, 19th century

Hanukkah lamp from Corfu Coin

Obverse: 1 Sheqel silver coin. Reverse: Hanukkah lamp from Corfu, 19th century.

Hanukkah lamp from France Coin

Obverse: 25 Lirot coin. Reverse: Hanukkah lamp from France

Hanukkah lamp from France Coin

Obverse: 25 Lirot coin. Reverse: Hanukkah lamp from France, 14th century