Attempt to Evaluate the Building Factor of a Stator Core in Inverter-Fed Permanent Magnet Synchronous Motor

Denis, Nicolas; Odawara, Shunya; Fujisaki, Keisuke

doi:10.1109/tie.2016.2573267

Cited by 9 publications

(15 citation statements)

References 25 publications

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“…The gap loss in the nanocrystalline core at high frequency was examined (18) . The building factor was considered as a useful factor to analyze and evaluate the iron loss properties of the reactor (19) and motor core under the inverter excitation (20) .…”

Section: Introductionmentioning

confidence: 99%

“…If it is based on a value other than the nominal iron loss, it can be called the extended building factor (BFEX). In a past study (20) , we also examined BFEX when the stator core of an IPMSM was driven by the PWM inverter excitation as used in real applications such as EV. However, this past study only focused on the iron loss properties of the motor core under the inverter excitation, and did not consider the case where IPMSM is driven by the sinusoidal excitation.…”

Section: Introductionmentioning

confidence: 99%

“…As described in Fig. 2 and Table 1, our past study (20) only considered the BFEX with the order of regions (II) ⇨ (IV) ⇨ (V) as indicated by the blue arrow, which focuses on effects of the inverter excitation; from the region (IV) ⇨ (V) is an evaluation of different core shapes under the same inverter excitation. Whereas, this study focuses on the other order of regions (II) ⇨ (III) ⇨ (V) mainly with the sinusoidal excitation as illustrated by the red arrow.…”

Section: Introductionmentioning

confidence: 99%

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Conceptual Diagrams of Extended Building Factor for Analysis and Evaluation of Factors on Core Loss Density Increase in IPMSM

et al. 2023

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This study analyzes and evaluates the stator core loss density of an interior permanent magnet synchronous motor (IPMSM) by proposing and developing conceptual diagrams of an extended building factor while considering the nonlinearity of the magnetic properties of the material. The IPMSM, whose stator and rotor are composed of non-oriented electrical steel, is investigated. First, the motor is driven by a three-phase inverter with the pulse width modulation (PWM) excitation method and then with the threephase sinusoidal excitation technique at a rotational speed of 1500 rpm in each condition. The calculation procedure of the stator core loss of the IPMSM is improved from our previous method. The finite element method (FEM) is used to support the identification and computation of motor iron losses, where the PWM carrier frequency is 10 kHz. In addition, experimental results of the extended building factor diagrams for the ring and IPMSM cores under the sinusoidal and inverter excitations are shown and discussed. The main objectives of this study are to investigate and clarify the reasons for increasing the IPMSM stator core loss density owing to the effects of the core shapes and two excitation methods, as well as to thoroughly identify the dominant impact between the core shape and excitation method on the increase in the iron loss density. Furthermore, based on the extended building factor, particular values of the IPMSM stator and rotor core losses in the experiment can be relatively separated and determined.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Conceptual Diagrams of Extended Building Factor for Analysis and Evaluation of Factors on Core Loss Density Increase in IPMSM

et al. 2023

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“…At the machine design level, finite element analysis has been applied to examine the causes of iron losses and reduce them. The results of these studies reveal that harmonic air-gap flux components, large rotational components of flux density and iron losses in the rotor near the air gap are factors that are responsible for iron losses in interior permanent magnet synchronous motor (IPMSM) operating in the flux-weakening mode [1][2][3][4]. These losses are reducible by designing the machine with flat stator teeth [5].…”

Section: Introductionmentioning

confidence: 99%

Internal Model Loss Minimization Control of Permanent Magnet Synchronous Machine

Babayomi¹,

Balogun²

2021

Nig. J. Tech.

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Electric drives are very useful in propelling the wheels of hybrid electric vehicles (HEVs). They also play a central function in the electric power steering (EPS). This paper describes studies carried out on the efficiency optimization of an interior permanent magnet synchronous machine (IPMSM) for application in the EPS. An analytic loss- minimization algorithm for an IPMSM was derived and the optimization problem took into consideration copper, iron and stray losses. The proposed loss minimization algorithm is simple and cost effective to implement. From the simulations carried out, significant efficiency gains are possible with this model. The internal model control (IMC) method was employed to achieve current and speed control with acceptable sensitivity to machine parameters.

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“…The PWM inverter output voltage supplied to wound soft-magnetic material cores or electrical motors tends to increase iron losses compared to the case of pure sinusoidal voltage supply (2) (3) . The impact of the PWM parameters, such as the carrier frequency (4) or voltage modulation index (5) , on electrical motor iron losses has been studied. The relation between the number of inverter level and the motor iron losses has also been investigated in (6) .…”

Section: Introductionmentioning

confidence: 99%

Study of the Effect of Load Torque on the Iron Losses of Permanent Magnet Motors by using Finite Element Analysis

Thao

Denis

et al. 2019

IEEJ Journal IA

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The output torque of a three-phase interior permanent magnet synchronous motor (IPMSM) can be controlled within its allowable range using a pulse-width modulation (PWM) DC-AC inverter. In this paper, the effect of load torque on the iron losses of an IPMSM is studied by considering three different driving conditions, namely no-current, noload, and load conditions. In order to perform a careful evaluation in the experiments, the motor is tested at various rotational speeds, namely 750 min −1 , 1500 min −1 , and 2250 min −1 ; the voltage modulation index of the PWM inverter and the load torque are also varied. The experimental results in all the test cases show that the iron losses of the motor vary when the excitation condition is varied among the no-current, no-load, and load cases. Furthermore, a three-dimensional (3D) finite element analysis (FEA) is performed for the main test case when the motor is operated at the rated speed of 750 min −1 for reference purpose. The harmonic components caused by the excitation inverter in the stator voltage, current, and magnetic flux density are found to be the main reasons for the increase in iron losses of the motor in the no-load and load conditions compared to the no-current condition; an increase in torque also causes a relatively significant increase in the iron losses.Keywords: finite element analysis, interior permanent magnet synchronous motor, iron loss, PWM inverter, effect of load torque

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Attempt to Evaluate the Building Factor of a Stator Core in Inverter-Fed Permanent Magnet Synchronous Motor

Cited by 9 publications

References 25 publications

Conceptual Diagrams of Extended Building Factor for Analysis and Evaluation of Factors on Core Loss Density Increase in IPMSM

Conceptual Diagrams of Extended Building Factor for Analysis and Evaluation of Factors on Core Loss Density Increase in IPMSM

Internal Model Loss Minimization Control of Permanent Magnet Synchronous Machine

Study of the Effect of Load Torque on the Iron Losses of Permanent Magnet Motors by using Finite Element Analysis

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