Position Estimation of AC Machines Over a Wide Frequency Range Based on Space Vector PWM Excitation

Gao, Qiang; Asher, G.M.; Sumner, Mark; Makyš, Pavol

doi:10.1109/tia.2007.900464

Cited by 91 publications

(39 citation statements)

References 12 publications

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“…As shown in the figure, at this point of operation the slotting modulation (Slotting) depicted as -2 nd harmonic is rotating with the same angular speed, but with opposite direction as the saturation modulation (Saturation) (depicted as +2 nd harmonic). The harmonic component caused by the interaction of saturation and slotting signals, as described above, in this case is visible as offset component according to (11). Fig.…”

Section: Resultsmentioning

confidence: 74%

“…Due to the no load condition and the machine construction (number of rotor slots equal 44, stator slots 36, pole pair number 2) the slotting component results in a -44 th harmonic. Finally the intermodulation component between saturation and slotting is obtained according to (11) as +40 th harmonic. In this operating range a clear separation of each signal component is possible without reducing control performance.…”

Section: Resultsmentioning

confidence: 99%

“…The relation between the harmonic orders of the intermodulation induced component, the slotting, and saturation saliencies is given in (11). The magnitude of the intermodulation induced disturbance is load dependent.…”

Section: Mathematical Descriptionmentioning

confidence: 99%

“…In recent years several new signal injection based approaches that integrate the di/dt measurements within the fundamental space vector PWM (SVPWM) sequence have been presented [8]- [11]. They all use the inverter states of a PWM cycle (either only the active or the active plus the inactive state) to exploit the saliency information.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Spectral overlap of saliency signal components in injection based sensorless controlled induction machines

Wolbank

Metwally

2010

2010 IEEE Energy Conversion Congress and Exposition

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Sensorless control techniques of ac machines based on fundamental wave methods have a critical point of operation at zero frequency. Using signal injection methods zero frequency operation is possible, however another critical point of operation may exist at overlap frequencies which, so far has not been addressed by research. The resulting signals from injection based sensorless control methods are composed of components caused by saturation, slotting or anisotropy saliencies, as well as intermodulation effects. The point of operation where the frequency of the slotting saliency equals the frequency of the saturation saliency is critical in terms of control performance as then a reliable separation is only possible feed forward. A mathematical description of the relation between the mechanical speed and load torque at the overlap of the slotting and saturation frequencies is given. Measurement results at specific points of operation are shown to point out that the critical point of operation is no longer zero speed or zero frequency but may be one of the operating states where an overlap in frequencies exists.

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Section: Resultsmentioning

confidence: 74%

Section: Resultsmentioning

confidence: 99%

Section: Mathematical Descriptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Spectral overlap of saliency signal components in injection based sensorless controlled induction machines

Wolbank

Metwally

2010

2010 IEEE Energy Conversion Congress and Exposition

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“…Instead of test signals, the method uses the PWM voltage pulses as an intrinsic input disturbance available from all three-phase inverters. The same approach has been advantageously used in estimating the rotor position in shaft-sensorless drives [9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Motor Temperature Monitoring Based on Impedance Estimation at PWM Frequencies

Popov

Vukosavić

Levi

2014

IEEE Trans. Energy Convers.

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Motor temperature monitoring based on impedance estimation at pwm frequencies http://researchonline.ljmu.ac.uk/111/ Article LJMU has developed LJMU Research Online for users to access the research output of the University more effectively. Copyright © and Moral Rights for the papers on this site are retained by the individual authors and/or other copyright owners. Users may download and/or print one copy of any article(s) in LJMU Research Online to facilitate their private study or for non-commercial research. You may not engage in further distribution of the material or use it for any profit-making activities or any commercial gain.The version presented here may differ from the published version or from the version of the record. Please see the repository URL above for details on accessing the published version and note that access may require a subscription.

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A novel magnet polarity identification method for initial position estimation for sensorless IPMSM drive

Ogasawara

Takemoto

2014

IEEJ Trans Elec Electron Eng

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This paper proposes a novel magnet polarity identification method for initial position estimation during startup for interior permanent magnet synchronous machine (IPMSM) drives. The rotor's initial position estimation is based on magnetic saliency and employs high-frequency (HF) components of the voltage and current that are excited by the multi space-vector pulse-width modulation (MSVPWM) pattern. However, there is a common trouble in the estimation methods based on the magnetic saliency: it is necessary to identify the magnet polarity in order to distinguish the north and south poles since the estimated position angle is a periodic function with π radians. In this paper, a novel inductance estimation method is presented and the magnet polarity is uniquely identified by the relationship between the estimated inductance and the magnetic saturation effect. Experimental results confirm the advantages of the proposed method: it is reliable, accurate, and convenient, and can be done in real time.

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Position Estimation of AC Machines Over a Wide Frequency Range Based on Space Vector PWM Excitation

Cited by 91 publications

References 12 publications

Spectral overlap of saliency signal components in injection based sensorless controlled induction machines

Spectral overlap of saliency signal components in injection based sensorless controlled induction machines

Motor Temperature Monitoring Based on Impedance Estimation at PWM Frequencies

A novel magnet polarity identification method for initial position estimation for sensorless IPMSM drive

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