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National Repository of Grey Literature

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	EMI Generated by Trolley-Bus with IGCT-Based Drive Budek, P. ; Doležel, Ivo ; Jehlička, Vladimír ; Škramlík, Jiří ; Valouch, Viktor The paper describes the employment of a new IGCT element in a dc chopper designed for feeding a dc trolley-bus traction motor. The discussed radiated EMI noise generated during the chopper operation was measured and calculated on a simplified model. The preliminary slow moving tests within the range 150 kHz - 30 MHz were performed. The results of the measurements of magnetic field exhibit the compliance with the European Standards EN 50121-2, EN 50121-3-1. Detailed record
	IGCT-Based Traction Drives for City Mass Transport Bartoš, Stanislav ; Jehlička, Vladimír ; Valouch, Viktor ; Večerka, Tomáš ; Bureš, J. ; Kalčík, K. ; Venhoda, E. The paper introduces a sunrise power semiconductor switching device called IGCT. Converters based on IGCTs might contribute in near future to the quality of electric drives. Detailed record
	Transfer of the Noise and Vibration from the Motor to the Passenger Space Budek, P. ; Chmelíček, M. ; Hejman, M. ; Jehlička, Vladimír Development of the new trolley-bus or change of its structure requires the noise and vibration measurements. the goals of the manufacturer is to reduce the noise level in space of passengers in the trolley-bus. The paper describes the process of identification of the noise sources, investigation of the vibration transfer and simulation of the structural behaviour by FEM program COSMOS/M. The computation-based structural changes are suggested. Detailed record
	IGCT Switches Used for Traction Drives Bartoš, Stanislav ; Jehlička, Vladimír ; Škramlík, Jiří ; Valouch, Viktor ; Večerka, Tomáš So far, the Integrated Gate-Commutated Thyristor (IGCT) has always been considered as a device suitable for converters controlling the power of the order of megawatts or higher. Detailed record
	Univerzální systém pro vývoj mikroprocesorového řízení el. pohonů a výkonových měničů Kokeš, Petr ; Fól, Ladislav ; Jehlička, Vladimír Detailed record
	Noise, Vibration and Electromagnetic eFFects Generated by Semiconductor Converters in Traction Vehicles Budek, P. ; Chmelíček, M. ; Jehlička, Vladimír New problems emerge in the vehicles of city mass transportation due to application of new power switching devices and their control circuitry. Measurements were performed in a low-floor trolleybus ŠKODA 21Tr equipped with power converters based on GTOs and IGBTs. They were aimed at finding the sources of noise and vibrations in the passenger space, at verifying their influence and finding methods for their limitation. Similarly, The same attention was paid to the problems of electromagnetic interference. Detailed record
	Development and Application of Thyristor IGCT Bureš, J. ; Homola, J. ; Jehlička, Vladimír ; Kalčík, K. The development of the power switching device IGCT in the Co. Polovodiče, Inc., principle of operation of the device, practical design of an IGCT chopper for feeding a traction motor, the device parameters. The development of an inverter with IGCTs in Institute of Electrical Eng. of Academy of Sciences of the Czech Rep. destined for means of transport driven by an induction motor. Detailed record

National Repository of Grey Literature : 17 records found   11 - 17  jump to record:

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1	Jehlička, Václav

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