Recently, permanent magnet assisted (PMa)-synchronous reluctance motors
(SynRM) have been considered as a possible alternative motor drive for high
performance applications. In order to have an efficient motor drive, performing of three
steps in design of the overall drive is not avoidable. These steps are design optimization
of the motor, identification of the motor parameter and implementation of an advanced
control system to ensure optimum operation.
Therefore, this dissertation first deals with the design optimization of the Permanent
Magnet Assisted Synchronous Reluctance Motor (PMa-SynRM). Various key points in
the rotor design of a low cost PMa-SynRM are introduced and their effects are studied.
Finite element approach has been utilized to show the effects of these parameters on the
developed average electromagnetic torque and the total d-q inductances. As it can be
inferred from the name of the motor, there are some permanent magnets mounted in the
rotor core. One of the features considered in the design of this motor is the
magnetization of the permanent magnets mounted in the rotor core using the stator
windings to reduce the manufacturing cost. At the next step, identification of the motor parameters is discussed. Variation of
motor parameters due to temperature and airgap flux has been reported in the literatures.
Use of off-line models for estimating the motor parameters is known as a
computationally intensive method, especially when the models include the effect of
cross saturation. Therefore in practical applications, on-line parameter estimation is
favored to achieve a high performance control system. In this dissertation, a simple
practical method for parameter estimation of the PMa-SynRM is introduced.
Last part of the dissertation presents one advanced control strategy which utilized the
introduced parameter estimator. A practical Maximum Torque Per Ampere (MTPA)
control scheme along with a simple parameter estimator for PMa-SynRM is introduced.
This method is capable of maintaining the MTPA condition and stays robust against the
variations of motor parameters.
Effectiveness of the motor design procedure and the control strategy is validated by
presenting simulation and experimental results of a 1.5 kW prototype PMa-SynRM,
designed and manufactured through the introduced design method.
| Identifer | oai:union.ndltd.org:tamu.edu/oai:repository.tamu.edu:1969.1/3178 |
| Date | 12 April 2006 |
| Creators | Niazi, Peyman |
| Contributors | Toliyat, Hamid A. |
| Publisher | Texas A&M University |
| Source Sets | Texas A and M University |
| Language | en_US |
| Detected Language | English |
| Type | Book, Thesis, Electronic Dissertation, text |
| Format | 2597857 bytes, electronic, application/pdf, born digital |
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