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DIRECT DIGITAL CONTROL OF FOUR-QUADRANT POWER CONVERTER
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| Author(s) |
T. Seger; M. Wächter |
| Abstract |
BBC has equipped eight four axle multi-purpose main-line locomotives Re 4/4 with asynchronous induction motor drives fed by voltage source inverters. Input power conversion is achieved by means of a Four-Quadrant Power Converter. Both the inverter and the converter are equipped with GTO's and fully controlled by four micro-controllers. Two of them are closely linked and handle the control algorithms of the Four-Quadrant Power Converter. One uP is for line synchronization and voltage control, the second uP handles all current control tasks and PWM of the three secondary loops. Design objectives were a good power factor ( = 1) and fast dynamic response. The extended possibilities of the MICAS(R) automation system allow the implementation of better control technology and the integration of extended diagnostic capability during normal operation of the drive system. As a result, the first two locomotives show good dynamic behaviour and very low harmonic content in the line current. |
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| Filename: | Unnamed file |
| Filesize: | 2.558 MB |
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| Type |
Members Only |
| Date |
Last modified 2021-03-03 by System |
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