Asynchronous Performance Prediction of AC Permanent Magnet Motor

Ishizaki,; Yamamoto,

doi:10.1109/mper.1986.5527660

Cited by 3 publications

(5 citation statements)

References 1 publication

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“…Although in some publications it was tried to achieve the separated torque components by driving the line-starting PM motor asynchronously as a pure PM motor or a pure induction motor [1], [5], [11], these methods cannot determine the correct torque characteristics due to the absence of the mutual effect of the cage and PM fields. Therefore, the methodology used in Fig.…”

Section: Measured Resultsmentioning

confidence: 99%

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Asynchronous Torque of Line-Starting Permanent-Magnet Synchronous Motors

Takahashi

Kikuchi

Miyata

et al. 2015

IEEE Trans. Energy Convers.

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A modified theory and a proposed analytical approach clarified asynchronous torque characteristics of linestarting permanent-magnet (PM) motors, taking into consideration the mutual effect among the fields due to armature current, cage-bar current, and PMs. Theoretical and analyzed results revealed that cage torque had an oscillating component with slip frequency due to magnetic saturation. This component cannot be seen in the conventional theory. It was also found that the coupling effect between PM flux and cage-bar flux caused on magnet torque larger oscillation and more significant negative dc component, compared with the case in the conventional theory. The theoretical and analyzed results were validated on the basis of experimental approaches. Results are given for a two-pole prototype motor with P N = 5 kW, n N = 3000 min −1 , V N = 200 V, and Y-connection.

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Section: Measured Resultsmentioning

confidence: 99%

“…More specifically, the asynchronous cage torque and the PM braking torque are separately calculated by considering a pure induction motor and a pure PM motor, respectively [1], [5], [11]. This assumption may lead to a miscalculation of each torque component.…”

mentioning

confidence: 99%

Asynchronous Torque of Line-Starting Permanent-Magnet Synchronous Motors

Takahashi

Kikuchi

Miyata

et al. 2015

IEEE Trans. Energy Convers.

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“…The HL-LSPMSM stator is similar to that of a conventional permanent magnet synchronous motor (PMSM). The basic equations [13,23] for the HL-LSPMSM are expressed in the direct-and quadratureaxis reference frames oriented by the flux of the rotor PMs.…”

Section: Basic Equation Of the Hl-lspmsmmentioning

confidence: 99%

“…The magnet configuration [8], magnetic circuit mode [3], and magnetising inductance [2,9] have been discussed to optimise the LSPMSM design to reduce the volume of PMs and offer a trade-off between the start-up and synchronisation processes. Compared with the improvement in the self-starting and synchronisation characteristics, the magnetic circuits [10], which include magnetic saturation and transient torque calculation approach [11,12] that takes into account the mutual effect and time-step finite-element analysis (FEA) [12][13][14][15][16] are implemented to accurately calculate the dynamic torque of the LSPMSM.…”

Section: Introductionmentioning

confidence: 99%

Design and control of high‐capacity and low‐speed doubly fed start‐up permanent magnet synchronous motor

Gao

Wang

Wei

2018

IET Electric Power Applications

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A novel rotor structure with a set of compensation winding for line-start permanent magnet synchronous motors for high capacity and low speed, which can meet the requirements of a ball mill with a high moment of inertia, is proposed to improve the motor-starting performance. A control strategy for the compensation winding current is implemented to increase the synchronisation ability with a high-inertia load. The compensation current and its control method are analysed using a mathematical model and verified using a time-step finite-element analysis. The simulation shows that the permanent magnet motor proposed in this study can successfully start at a load of 15 times rotor inertia.

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“…Theoretical prediction were checked experimentally by tests on a 2 hp, 115/230 V, 60 Hz and 1800 rpm PMSM with internal magnets in the rotor. Also in 1986, Ishizaki and Yamamoto [57] developed a method of predicting the asynchronous performance of LSPMSMs by using a new concept which they called 'Harmonic permeance coefficient' based on FE field solution of the machine combined with the air gap inductance calculation. The pulsating torque could then be calculated by using these air gap inductances.…”

Section: Transient State Analysismentioning

confidence: 99%

Overview of research evolution in the field of line start permanent magnet synchronous motors

Ugale

Chaudhari

Pramanik

2014

IET Electric Power Applications

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In this study, wide overview of the existing line start permanent magnet synchronous motors literature is presented. The treatment of the subject has been effectively subdivided in to five sections; (i) rotor topologies and design, (ii) steady state analysis, (iii) transient state analysis, (iv) parameter estimation and (v) high efficiency standards. Although, there are numerous papers published in each category, only those important papers which have made significant contributions in the developments and thus triggered research in this field are discussed here. 2 Rotor topologies and design The performance of the Merrill's PM excited synchronous motor [1] was found to be comparable with that of induction motor (IM). Fig. 1 shows the Merrill's rotor configuration. The four sets of flux loops (i.e. A, B, C and D) as shown in the figure, show the corresponding flux patterns under different operating conditions; and should not be taken as a complete flux distribution pattern for a single condition. The machine has negligible reluctance torque component. Alger's discussion on this paper is quite informative and he had postulated that LSPMSM will gain popularity if the future research produces a magnet of higher stored energy and coercive force. Douglas [2], then in 1959, derived the current loci of Merrill's motor by using Blondel's two-reactance theory and predicted that with improved magnet materials, the machine performance would be better. Subsequently, based on the guidelines by Merrill in his paper, a 2 pole, 0.5 hp machine was developed as shown in Fig. 2, and reported by Cahill and Adkins [3]. They found that the rated and the pull-out torque of this machine were less than those of IM of the same frame size because of the lower value of air gap flux density. Moreover, authors observed that this www.ietdl.org

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Asynchronous Performance Prediction of AC Permanent Magnet Motor

Cited by 3 publications

References 1 publication

Asynchronous Torque of Line-Starting Permanent-Magnet Synchronous Motors

Asynchronous Torque of Line-Starting Permanent-Magnet Synchronous Motors

Design and control of high‐capacity and low‐speed doubly fed start‐up permanent magnet synchronous motor

Overview of research evolution in the field of line start permanent magnet synchronous motors

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