Direct-on-line-start permanent-magnet-assisted synchronous reluctance motors with ferrite magnets for driving constant loads

Viego, Percy R.; Santos, Vladimir Sousa; Gómez, Julio R.; Quispe, Enrique C.

doi:10.11591/ijece.v10i1.pp651-659

Cited by 8 publications

(12 citation statements)

References 18 publications

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“…T max =t max .T n (5)  The determination of the total leakage reactance Xcc and its division in equal parts between the stator and rotor [1]:…”

Section: Parameters Determination Algorithmmentioning

confidence: 99%

“…The three-phase induction motor is the electromechanical converter of the electric drive of the great majority of mechanisms or mechanical loads and the principal electrical energy consumption of industrial installations [1,2]. This means that the knowledge of the mathematical models that allow the prediction of the behavior of these motors on the electric grid as well as on the mechanical system of which is its driver has great importance.…”

Section: Introductionmentioning

confidence: 99%

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A new exact equivalent circuit of the medium voltage three-phase induction motor

Solar¹,

Montiel²,

Llanes³

et al. 2020

IJECE

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This paper proposes a new equivalent circuit for medium voltage and great power induction motors considering the more complete information given by the manufacturer. A methodology for obtaining the parameters of the equivalent circuit is presented, having this circuit the advantage of allowing the electrical calculation of all the power losses and the realization of the power balance. It is an achievement of this work a new way of calculating and representing the additional losses using a resistance located in the rotor circuit. Then, three types of losses are considered as a part of a power balance: the conventional or joule effect variable losses, the constant losses, and the additional losses. The proposed method is straight and non-iterative. It was applied to a case study motor of 6000 V and 2500 kW located at the Maximo Gomez Power Plant in Cuba.

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“…T max =t max .T n (5)  The determination of the total leakage reactance Xcc and its division in equal parts between the stator and rotor [1]:…”

Section: Parameters Determination Algorithmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A new exact equivalent circuit of the medium voltage three-phase induction motor

Solar¹,

Montiel²,

Llanes³

et al. 2020

IJECE

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show abstract

“…Figure 1 (a) shows the structure of a PMa-SynRM without the permanent magnets (PM) in place. In Figure 1 (b), the details of the structure of a rotor lamination with the PM inserted are given [13]. The torque pulsations have two main components: torque ripple and cogging torque.…”

Section: Introductionmentioning

confidence: 99%

“…Figure 1. Structural details of a PMa-SynRM, a) PMa-SynRM without the PM in place, b) Rotor laminationarrangement with de PM in place[13] …”

mentioning

confidence: 99%

Reducing torque pulsations in PMa-SynRM: a way for improving motor performance

Viego

Gómez

Sousa

et al. 2021

IJPEDS

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This paper aims to evaluate the performance of synchronous reluctance motors assisted by a permanent magnet (PMa-SynRM) focused on efficiency and torque pulsations. PMa-SynRM shows high efficiency and power factor, compared to induction motors (IM), although they have a greater cost. These machines develop relatively high torque ripple, cogging torque, and torque imbalances. Consequently, the electromagnetic torque is reduced, the motor temperature is increased, and mechanical vibrations are induced. The optimal design of the machine structures such as flow barriers, permanent magnets, and stator slots, among others, allow reducing torque pulsations. A comparison is made between different designs of the PMa-SynRM reported in the scientific literature, and the effects on efficiency, torque pulsation, and operating costs are evaluated. A case study on the motor driving the air conditioner blower in a hotel room was made, to determine the best economic variant between IM or PMa-SynRM. A sensitive analysis was made to evaluate several uncertainties. The advantages of using one of the PMa-SynRM analyzed were demonstrated. Also, it was proved that the investment is feasible economically, although NPV and payback are not the best, due to low load factor in inverter-controlled motors in air conditioners.

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“…The research on the field of the line-start motors is not limited to the synchronous motors with permanent magnets. The capabilities of hysteresis and reluctance motors for direct line starting are investigated as well [17], [18]. Faults that can occur during operation of line-start synchronous permanent magnet motors are subject to the mathematical modelling, simulation and analysis [19]- [21].…”

Section: Introductionmentioning

confidence: 99%

Comparative Analysis of Line-start Synchronous Motor and Asynchronous Motor

Śarac¹

2021

EEA

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Energy efficient motors are the key components of each industrial process. In the energy demanding society, requiring the energy efficient consumers, the line-start synchronous motor has gained more and more popularity due to the high efficiency and power factor combined with good operational characteristics. The disadvantages of the synchronous motors such as inability of starting without the inverter has been largely overcame with this type of the motor. However, the proper design of line-start motor regarding permanent magnets and the squirrel cage winding is crucial for motor starting and synchronization capability. In this paper, the line-start synchronous motor is derived from the asynchronous motor by redesigning the rotor. The obtained performance characteristics of the synchronous motor is compared with the data of the asynchronous motor (the analytical, measurements and from the motor producer) and they show reasonable agreement. The derived model of the synchronous motor is numerically modelled for obtaining the magnetic flux density distribution in the motor cross-section. The analysis and comparison is completed by obtaining the transient characteristics of both types of the motors. The designed synchronous motor has proven to have good starting and synchronization capabilities combined with the high efficiency. The dynamic response at sudden load changes is within expected limits.

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Direct-on-line-start permanent-magnet-assisted synchronous reluctance motors with ferrite magnets for driving constant loads

Cited by 8 publications

References 18 publications

A new exact equivalent circuit of the medium voltage three-phase induction motor

A new exact equivalent circuit of the medium voltage three-phase induction motor

Reducing torque pulsations in PMa-SynRM: a way for improving motor performance

Comparative Analysis of Line-start Synchronous Motor and Asynchronous Motor

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