Fast high-voltage, high-current switching using stacked IGBTs

Ghasemi, Z; MacGregor, S.J.; Dick, A.R.; Tuema, F.A.

doi:10.1049/ic:20010123

Cited by 1 publication

(1 citation statement)

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“…However, this problem can be solved by using solid-state switching devices. The use of solid-state switches has been restricted by limitations in their voltage/current rating or switching speed; however, stacking fast medium-voltage devices, such as insulated-gate-bipolar-transistors (IGBTs), to improve the voltage rating can provide a useful alternative to conventional switches such as spark gaps [7,8]. This offers a number of advantages, such as high pulse repetition potential, low maintenance, low cost and better flexibility in terms of voltage and current ratings.…”

Section: Solid-state Marx Generatormentioning

confidence: 99%

Development of an integrated solid-state generator for light inactivation of food-related pathogenic bacteria

Ghasemi

MacGregor

Anderson

et al. 2003

Meas. Sci. Technol.

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This paper is concerned with the design and performance of a fully integrated solid-state Marx generator, which has been developed to drive a UV flashlamp for use in microbiological inactivation. The generator has an output voltage rating of 3 kV and a peak current rating of 2 kA, although the modular approach taken allows for a number of voltage and current ratings to be achieved. The generator is constructed using a number of series-and parallel-connected 1.2 kV insulated-gate-bipolar-transistor (IGBT) switched capacitors. Switching of the IGBT modules is controlled by an optical signal. Details are given of how the optimum IGBT gate-drive circuit is achieved using optical components and a pass-through wire to provide the required energies for individual IGBT modules. The generator is demonstrated as the driver of a UV flashlamp used for inactivation of food-related pathogenic bacteria such as E. coli and Salmonella. The performance of the Marx generator over a period of 10 6 pulses is examined, along with the changes that occur in the spectrum of the UV flashlamp during the same period.

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Section: Solid-state Marx Generatormentioning

confidence: 99%