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A New Topology for PWM Current Source Inverter with IGBT
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| Author(s) |
R. Mecke; U. Riefenstahl; B. Neumann |
| Abstract |
At the moment PWM current source inverters are equiped with GTO-thyristors and used for
asynchronous drives in the power range between 1.5 and 13.5 megawatt. An essential problem of these
inverter topology are the interactions between the impedance and the filter capacitors on the line and
motor side. These oscillating circuits can be excited by low order harmonics and by the switching
frequency and can cause instable operation of the drive. The paper presents a new topology for PWM
current source inverters. In comparison to the conventional inverter circuit it enables a considerable
reduction of the filter capacitors and therefore a decrease of the inverter size. Moreover the small filter
capacities create high resonance frequencies of several kilohertz, which cannot be excited by low order
harmonics. Thats why the resonance problems on the line and motor side can be avoided, the field
oriented control can be strongly simplified and the dynamic behaviour of the drive system can be
improved. A condition for this are switching frequencies of several kilohertz, which can be realized for
instance by using IGBT. The function of the new inverter topology was proved by simulation and
experiment. Some results are shown. |
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| Filename: | EPE1999 - PP00133 - Riefenstahl.pdf |
| Filesize: | 194.3 KB |
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| Type |
Members Only |
| Date |
Last modified 2004-03-24 by System |
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