National Repository of Grey Literature 141 records found  beginprevious131 - 140next  jump to record: Search took 0.01 seconds. 
Experimental and numerical analysis of magnetic drive
Houfek, Lubomír ; Fuis, Vladimír ; Krejčí, Petr
In paper is presented methods of numerical and experimental solution of magnetic drive.
Behaviour of magnetic drive for different number of magnetic pairs and temperatures
Houfek, Lubomír ; Fuis, Vladimír ; Krejčí, Petr
This paper concurs on our previous work in this problem. The mostly limited parameter for using magnetic drives is temperature. Permanent magnets can't use near Currie point, where it lost our magnetic features. Temperature changes under Currie point changes of magnetic properties of permanent magnets and changes of behavior of magnetic drives. The second main limited parameter is core pole factor. The magnitude of core pole factor relate with number of pairs of permanent magnet.
Dynamics of magnetic drive
Houfek, L. ; Fuis, Vladimír
In paper is solved mathematical modeling and experimentel verification of dynamic properties of magnetic drive.
Dynamics of magnetic drive
Houfek, L. ; Fuis, Vladimír
In paper is solved mathematical modeling and experimentel verification of dynamic properties of magnetic drive.
Computational and experimental analysis of behavior of magnetických spojek
Houfek, Lubomír ; Krejčí, Petr
In paper is summary of experimental and computational solution of magnetic drive.
Diagnostics of Breakdown in Electric Arc Exposed to External Magnetic Field
Hlína, Jan ; Šonský, Jiří
An arc in external magnetic field acquires a helical shape and when the magnetic field exceeds a critical value the arc starts to oscillate. The oscillations may lead to many types of shortenings (breakdowns) between the adjacent windings of the arc path. We have investigated experimentally the steepness of the voltage fall reflecting the breakdown and the influence of mean arc voltage and electrode polarity on this characteristic.
Electromagnetic emissions of a trolley-bus with IGCT-based drive
Doležel, Ivo ; Jehlička, Vladimír ; Škramlík, Jiří ; Valouch, Viktor
The paper describes utilisation of a new IGCT-based element in DC inverter designed for feeding of a DC traction motor for trolley-bus. It deals with emissions of electromagnetic field (EMI) produced by operation of the inverter EMI was measured and calculated on a simplified model. Realised was a preliminary best during a low-speed trip within frequency range 150 kHz - 30 MHz. The results exhibit a good accordance with European Standards EN 50121-2, EN 50121-3-1.

National Repository of Grey Literature : 141 records found   beginprevious131 - 140next  jump to record:
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