The patent's assignee is
News editors obtained the following quote from the background information supplied by the inventors: "In vehicle inverter drives, for example of electric trains or trams, intermediate circuits of inverters may be connected in parallel. There may be two to ten parallel inverters, for example. The intermediate circuits of inverters may include film capacitors of small capacitance, the equivalent series resistance (ESR) of which is low. In such circuits, the parallel connection may be the resonant circuit that is formed by the intermediate circuit capacitors and the conductors between them and that has low damping.
"Oscillation caused by the resonant circuit may complicate drive control and also damage the drive components."
As a supplement to the background information on this patent application, VerticalNews correspondents also obtained the inventors' summary information for this patent application: "An arrangement for a vehicle inverter drive is disclosed, the arrangement comprising: a voltage distribution block; two or more inverters, intermediate circuits of which are connected in a parallel connection to the voltage distribution block for supplying voltage to the intermediate circuits; and a coaxial cable for interconnecting the intermediate circuits of the inverters to reduce inductance in the parallel connection.
"A method is also disclosed for a vehicle inverter drive having a voltage distribution block and two or more inverters, intermediate circuits of which are connected in a parallel connection to the voltage distribution block, the method comprising: supplying voltage from the voltage distribution block to the intermediate circuits; and interconnecting the intermediate circuits of the inverters via a coaxial cable for reducing inductance in the parallel connection.
BRIEF DESCRIPTION OF THE FIGURES
"The invention will be described in greater detail in connection with preferred exemplary embodiments, and with reference to the accompanying drawings, in which:
"FIG. 1 shows an exemplary arrangement disclosed herein for a vehicle inverter drive; and
"FIG. 2 shows another exemplary arrangement disclosed herein for a vehicle inverter drive."
For additional information on this patent application, see: TALJA, Markku; SEVAKIVI, Pertti. Arrangement and Method for a
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