Determination of permanent magnet synchronous motor parameters for use in brushless DC motor drive analysis

Gorman, Steve; Chen, C.; Cathey, J.J.

doi:10.1109/60.8084

Cited by 22 publications

(7 citation statements)

References 6 publications

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“…In order to compare methods, it was necessary to make allowance for the armature leakage reactance. Using methods described elsewhere [10], the value for the motor under test is X 1 =2.48ɏ. The results show good agreement with the variances being attributed to variations in magnetic material been used in the 2D analysis.…”

Section: Confirmation Of Results Using Finite Element Analysismentioning

confidence: 99%

“…On-line identification methods, using the stator circuit response to auxiliary injected signal of imposed frequency are very suitable for servo drives, and detailed in [20], [21], and [22]. Another method of synchronous reactance determination, involving tests made with the rotor at standstill is described in papers [4], [10] and [23]. In this procedure, the saliency of the magnetic circuit appears when the self and mutual inductance is found by a trigonometric function of the rotor position, following measurements with the PMSM energized from a single-phase.…”

Section: Introductionmentioning

confidence: 99%

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A study on determination of parameters for permanent magnet synchronous machine by comparing load tests and Finite Element Analysis

Carpenter

Deleanu

Nguyen

et al. 2011

2011 24th Canadian Conference on Electrical and Computer Engineering(CCECE)

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This paper presents a comparison between results, for two methods of obtaining the values of "d-axis" synchronous reactance X sd and "q-axis" synchronous reactance X sq , of the permanent magnet synchronous motor with radial magnets (RPMSM). The paper provides a background describing the benefits of using the RPMSM machine and how the synchronous reactance parameters are valuable in determining stability and control algorithms for the machine. The two methods described are a load test under constant frequency conditions and Finite Element Analysis (FEA). Results obtained from the load tests, including the internal load angle į, have been used to calculate X sd and X sq and represent their values with respect to the armature current and internal angle į. Comparative results have been extracted using FEA. Good agreement between results is illustrated. Future developments conclude the paper.Index Terms-Permanent Magnet Synchronous Motor (PMSM), Permanent magnets, synchronous reactance, radial permanent magnets synchronous motor (RPMSM), counter electromotive force (back EMF), saliency ratio, Finite Element Analysis (FEA), position transducer, Samarium Cobalt (SmCo), Normal Flux Density SYMBOLS AND NOMENCLATUREf n -nominal frequency I sd , I sq -"d-axis" , respectively "q-axis" component of the stator current in the rotor reference frame V sd , V sq -"d-axis" , respectively "q-axis" component of the stator voltage in the rotor reference frame L s -Stator self inductance L sd , L sq -stator synchronous inductance along the "d", "q" axis RR ngle) s -stator resistance v s , i s -space vector of the stator voltage and current į i -electrical Angle between the phase voltage and the phase induced EMF (internal angle or load a ĳ -power Factor Angle (angle between v s and i s ) ȕ -torque Angle (the angle between i s and the "d-axis") Ȧ r -rotor angular frequency Ȧ n -nominal angular frequency) T e -electromagnetic (developed) torque T L -load torque E i -total Induced EMF per phase E PM -induced EMF due to the permanent magnets per phase X sd , X sq -direct ("d-axis") and quadrature ("q-axis") reactance V s , I s -stator voltage, respectively current, steady state S 1 , P 1 -apparent , respectively real input power of PMSM cosĳ -input power factor of PMSM P 1 -input real power P 2 -output (shaft) power S 1 -input apparent power INTRODUCTIONThe PMSM has become popular in recent years because of its advantages over the wound rotor synchronous motor: These advantages include higher specific torque and shaft power, robustness, lower maintenance costs, better dynamic performances, as well as simplified converter configurations for variable frequency operation.In comparison with the induction machine, a PMSM displays higher efficiency and power factor vales for the same load conditions. Consequently, a PMSM drive will require a variable frequency converter with lower ratings than an induction motor similar pole configuration and power rating.Following significant advances in power electronic systems, control strategies and permane...

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Section: Confirmation Of Results Using Finite Element Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A study on determination of parameters for permanent magnet synchronous machine by comparing load tests and Finite Element Analysis

Carpenter

Deleanu

Nguyen

et al. 2011

2011 24th Canadian Conference on Electrical and Computer Engineering(CCECE)

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“…a) Analytical Calculation [2], [3], [5], [6] b) Tests with the rotor at standstill [4], [7] c) Determination through no-load and load steady state measurements [1], [8]- [11] d) Numerical methods: finite element analysis [1], [12] e) Transient current waveform analysis [13], [14] f) On-line determination by using the PMSM stator circuit response to the signal injection [15] - [17] In this paper only two methods have been used for the evaluation of the PMSM parameters: methods a) and b) above. The motor under investigation has the characteristics: P n =5HP,p=4(N r =1800RPM),V n =230/460V,I n =12/6A,m 1 =3 phases, with magnets of SmCo.…”

Section: Pmsm Construction Types and Methods For Parameter Determinationmentioning

confidence: 99%

“…Connection for single phase asymmetrical energizing (phase A) With the rotor at standstill, the RPMSM presents the following mathematical model, which consists of the following set of three voltage equations for the stator and two for the rotor [7]: …”

Section: Tests With the Rotor At Standstillmentioning

confidence: 99%

“…The RPMSM under analysis presents a structure with symmetrical stator windings and rotor saliency. One can express the cyclical "self" and "mutual" inductances, for configurations where "d-axis" has a higher magnetic reluctance value as [7], [21]: According to the method given in [7], one single phase of the stator winding is connected across the terminals of a single-phase power supply, while the rotor is held at standstill (figure 5). In this test configuration, the "d-axis" of the stator winding and the magnetic axis of the phase A of the stator are aligned following a procedure similar to the one given in [8].…”

Section: Tests With the Rotor At Standstillmentioning

confidence: 99%

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Parameter determination of synchrnous machine with radial permanent magnets using analytical calculation and standstill tests

Carpenter

Deleanu

2012

2012 25th IEEE Canadian Conference on Electrical and Computer Engineering (CCECE)

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In this paper, the two methods used and compared for obtaining the values of direct axis and quadrature synchronous reactance, as well as leakage reactance of the permanent magnet synchronous motor with radial magnets (RPMSM) are: analytical calculation of parameters, and the standstill tests, with locked rotor. The rotor of the motor studied in this paper contains embedded symmetrical sections of aluminum molded squirrel cage. The stator phase winding consists of two sets of turns that can be connected either, in parallel or series, providing a dual voltage connection of the PMSM across three-phase 230V or 460V. The two methods described in this paper showed good correlation of results. These resulting values are required as inputs for the specification of the controller parameters of AC drives using RPMSM.Index Terms-Permanent magnets (PM), synchronous reactance, radial permanent magnets synchronous motor (RPMSM), Samarium Cobalt (SmCo) SYMBOLS AND NOMENCLATUREf n -nominal frequency V A , V B , V C -line to neutral (phase) voltages of the stator L AA , L BB , L CC -Stator phase winding self-inductance M AB , M BA , M BC , M CB , M CA , M AC -Stator phase winding mutual inductance M D -mutual Inductance between the stator phase winding and the "d-axis" component of the rotor damper winding M Q -mutual Inductance between the stator phase winding and the "q-axis" component of the rotor damper winding Θ-angle between the rotor "d-axis" and the stator "Aphase" magnetic axis L sd , L sq -stator synchronous inductance along the "d", "q" axis L ad , L aq -stator magnetizing inductance along the "d", "q" axis R 1 -stator resistance X sd , X sq -direct ("d-axis") and quadrature ("q-axis") reactance X ad , X aq -direct ("d-axis") and quadrature ("q-axis") magnetizing reactance ω n -nominal frequency in rad/s i A , i B ,i C -phase currents for the stator windings i D , i Q -currents in the "d-axis", respectively "q-axis" rotor damper windings ψ A , Ψ B ,Ψ C -phase fluxes of the stator windings Ψ D , Ψ Q -magnetic fluxes of the "d-axis", respectively "qaxis" rotor damper windings Ψ PM -flux due to the permanent magnets per phase INTRODUCTIONThe applications of Permanent Magnet (PM) AC machines may be divided into two main types: PM Synchronous (PMSM) and Brushless DC (BLDC). PMSMs and BLDCs became available for many applications, following advances in power electronic devices, topologies for converters, control strategies and rare earth permanent magnet materials.The advantages of these types of machines compared to the wound rotor (electrical excitation) synchronous machines are described elsewhere [1]-[4] and are summarized here. There is no electrical power dissipated in the excitation circuit which accounts for the overall increased efficiency for PMSM. Usually, the efficiency for a PMSM is higher than a synchronous motor of classical construction with the same rated power and speed, for similar load conditions. PMSM can operate at a higher specific torque and shaft power with respect to motors using wound rotor excitat...

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An adaptive H∞ controller design for permanent magnet synchronous motor drives

Lee

Lin

2005

Control Engineering Practice

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Determination of permanent magnet synchronous motor parameters for use in brushless DC motor drive analysis

Cited by 22 publications

References 6 publications

A study on determination of parameters for permanent magnet synchronous machine by comparing load tests and Finite Element Analysis

A study on determination of parameters for permanent magnet synchronous machine by comparing load tests and Finite Element Analysis

Parameter determination of synchrnous machine with radial permanent magnets using analytical calculation and standstill tests

An adaptive H∞ controller design for permanent magnet synchronous motor drives

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