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CONTROL OF A RESONANT DC·LINK CONVERTER WITH A HIGH MAINS POWER FACTOR - THE NEED FOR A POWERFUL SIMULATION TOOL
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| Author(s) |
Astrid Petterteig; Tore Undeland |
| Abstract |
In this paper the low loss resonant DC-link power converter is analyzed. The resonant link is common for both the rectifier and the output converters. Thus, both the input rectifier and the output converters are switched nearly lossless. The resonant DC-link is supplied by a switched rectifier to achieve a sinusoidal mains current. Two different output converters are analyzed, one DC-DC converter and one three phase inverter for AC-motor load. The circuit simulation program KREAN has got the possibility to define user programmable modules. These features are used to be able to analyze this converter. The control of the zero voltage interval and the current controllers with different modulation methods, are performed inside the programmable modules. To maintain the resonant voltage it is necessary to have a controlled zero voltage interval. The length of each interval is calculated, based on the last and the next state of all the converters connected to the DC link. Different modulation methods are analyzed to see their influence on the ripple currents and on the power flow in the circuit. A method for current control of the three phase inverter for AC-motor load is discussed and verified. |
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| Filename: | Unnamed file |
| Filesize: | 3.987 MB |
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| Type |
Members Only |
| Date |
Last modified 2019-07-25 by System |
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