Design and Implementation of Periodic Speed Controller and Current Estimator for a Fault-Tolerant PMSM Drive System
This thesis proposes a periodic speed controller and a sliding-mode current estimator for fault-tolerant permanent magnet synchronous motor drive systems. The fault-tolerant conditions including one power switch open-circuit, one power switch short-circuit, or one Hall-effect current sensor fault...
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| Format: | Theses |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/36655 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | This thesis proposes a periodic speed controller and a sliding-mode current
estimator for fault-tolerant permanent magnet synchronous motor drive systems. The
fault-tolerant conditions including one power switch open-circuit,
one power switch short-circuit, or one Hall-effect current sensor fault. By using
the speed-loop periodic controller, the drive system has better performance, including
faster transient responses and better load disturbance responses
than a speed-loop PI controller drive system. The detailed design of
the periodic controller and the fault-tolerant drive system, including fault detection,
diagnosis, and control are included.
In addition, a sliding mode current estimator is investigated to estimate
the stator current. The estimated current is used to replace the measured current when
a Hall-effect current sensor is faulty. A 32-bit digital signal processor,
type TMS-320F-2802, is used to execute the fault-tolerant algorithm and
periodic control algorithm. Experimental results show the measured results
can validate the correctness of the theoretical analysis. |
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