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AC-MOTOR DRIVE WITH REGENERATIVE BRAKING AND REDUCED SUPPLY LINE DISTORTION
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| Author(s) |
O. Niermeyer; D. Schröder |
| Abstract |
A standard squirrel-cage induction motor is connected to a pulse-width-modulated inverter supplied by a constant dc-link voltage. The dc-link is fed by a similar inverter from the three phase line, allowing power flow between the line and the machine in arbitrary direction at zero phase displacement and low line current harmonics. Each inverter is controlled by a current vector control with on-line optimization to minimize the inverter losses for a predefined current hysteresis. The line current phase displacement and the dc-link voltage are controlled by the superimposed lineside control. The machine state control, based on flux orientation for impressed stator currents uses a machine model to estimate the non-measurable internal machine values. Correlating signals obtained in the current control with model signals enables fast readjustment of the model parameters according to the variable machine parameters. High utilisation of all power components and a distinguished dynamic behaviour are the essential advantages of the presented Four-Quadrant AC-Motor Drive with full digital control. |
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| Filename: | Unnamed file |
| Filesize: | 816.7 KB |
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| Type |
Members Only |
| Date |
Last modified 2021-02-22 by System |
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