A Duty-factor Direct Torque Control Approach for Elimination of Common Mode Voltage Spikes in a Five-Phase Induction Motor Drive
Common mode voltage (CMV) is a major problem in motor drives that causes premature motor failure. In inverter-fed motor drives the CMV due to zero vectors (ZVs) is half the DC link voltage which shows the importance of exclusion of ZVs from the control. Even if the active vectors alone are used fo...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Stefan cel Mare University of Suceava
2024-11-01
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| Series: | Advances in Electrical and Computer Engineering |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.4316/AECE.2024.04009 |
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| Summary: | Common mode voltage (CMV) is a major problem in motor drives that causes premature motor failure. In inverter-fed motor drives
the CMV due to zero vectors (ZVs) is half the DC link voltage which shows the importance of exclusion of ZVs from the control.
Even if the active vectors alone are used for control, there is a chance of ZV generation during the dead time of inverter
leading to undesired spikes in CMV. In this work, a method based on Direct Torque Control (DTC) using AVs alone is implemented
on a five-phase induction motor (FPIM) fed using a two-level five-phase inverter (TL-FPI). The inverter switching vectors
before and after dead time are analyzed for ZV generation during dead time and are modified accordingly. The adverse effect
on drive performance due to the vector modification as well as the limitations of conventional DTC is overcome by adjusting
the duty factor (magnitude) of the final vector using a proportional integral (PI) controller. Experimental verifications are
done to validate the performance of the proposed scheme. |
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| ISSN: | 1582-7445 1844-7600 |