Energy Efficiency in Variable Speed Centrifugal Chiller Systems Driven by Synchronous Reluctance Motors

Oliveira, Felipe Silva; Ukil, Abhisek

doi:10.1109/isgt-asia.2018.8467811

Cited by 5 publications

(5 citation statements)

References 9 publications

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“…The survey of indoor air contaminants' characteristics for overall control and air quality management is a compound problem [28,29]. It was offered that measuring and research of indoor CO 2 mass can be used to realize IAQ and ventilation productivity.…”

Section: Datamentioning

confidence: 99%

Indoor Air Quality Control Using Backpropagated Neural Networks

Uskenbayeva¹,

Altayeva²,

Gusmanova³

et al. 2022

Computers, Materials &Amp; Continua

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Providing comfortable indoor air quality control in residential construction is an exceedingly important issue. This is due to the structure of the fast response controller of air quality. The presented work shows the breakdown and creation of a mathematical model for an interactive, nonlinear system for the required comfortable air quality. Furthermore, the paper refers to designing traditional proportional integral derivative regulators and proportional, integral, derivative regulators with independent parameters based on a backpropagation neural network. In the end, we perform the experimental outputs of a suggested backpropagation neural network-based proportional, integral, derivative controller and analyze model results by applying the proposed system. The obtained results demonstrated that the proposed controller can provide the required level of clean air in the room. The proposed developed model takes into consideration international Heating, Refrigerating, and air conditioning standards as ASHRAE AND ISO. Based on the findings, we concluded that it is possible to implement a proposed system in homes and offer equivalent indoor air quality with continuous mechanical ventilation without a profuse amount of energy.

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Section: Datamentioning

confidence: 99%

Indoor Air Quality Control Using Backpropagated Neural Networks

Uskenbayeva¹,

Altayeva²,

Gusmanova³

et al. 2022

Computers, Materials &Amp; Continua

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“…The iron part width (𝑖𝑤) is proportional to the average MMF along d axis (𝐹); i.e. k th and h th segments can be written as in equation (1). By calculating the average MMF for each iron part and solving the equation set, the iron part width is obtained.…”

Section: 1conventional Design Of Rotor Geometric Structurementioning

confidence: 99%

“…Recently, synchronous reluctance motors (SynRM) have already attracted the attention of various industries application such as pumps [1], electric vehicles [2,3] and elevators [4][5] due to reduced maintenance costs, reduced manufacturing costs and high efficiency. This process has led to research on the optimization of rotor parameters and the selection of rotor types with the aim of improving SynRM performance.…”

Section: Introductionmentioning

confidence: 99%

“…This process has led to research on the optimization of rotor parameters and the selection of rotor types with the aim of improving SynRM performance. In [1], studies on the flux barrier (FB) machine and the salient pole machine have been performed and compared. Researches can be done on the number of flux barriers and the number of stator teeth.…”

Section: Introductionmentioning

confidence: 99%

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C & Circular Shaped Barriers Optimization in a Synchronous Reluctance Rotor for Torque Ripples Minimization

2021

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Due to the lack of magnets and the suitable final price, synchronous reluctance motors are potential applicants for household electric appliances and so on. But in general, they suffer from high torque ripple. Optimized design of the synchronous reluctance rotor structure is presented for two different types of barrier shape with aiming to reduce the torque ripple along with increasing the average torque.In this paper, the optimization of rotor geometries with a fixed machine size for C-shaped barriers and circular barriers type is investigated. Most of the rotor parameters such as the width of iron parts, and the width of barriers along d and q axis are optimized by a new method using the PSO algorithm. Besides, the angle of end points for each barrier with constant rib and insulation factor are considered in optimization process. Minimizing the torque ripple without losing or even increasing the average torque is the most critical optimization achievement. Two prototypes of the optimized rotor with the C-shaped and circular barriers type have been fabricated and experimentally compared. The results obtained from the 2-D Finite Element Simulation of the recommended machine conform well to the experimental result.

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“…High-efficiency synchronous reluctance motors (SynRM) can be a good option to replace with induction motors (IM) in fulfilling the customer's requirements. The efficiency of IM decreases sharply at low speeds in applications such as chillers and elevators (Oliveira and Ukil, 2018;Matsuo and Lipo, 1994;Li et al, 2020), which work partially in the full load mode and affect the efficiency of the machine. But SynRMs can work in high-efficiency points at different speeds.…”

Section: Introductionmentioning

confidence: 99%

Torque ripples reduction in a synchronous reluctance motor by rotor parameters optimization

Naeimi

Abbaszadeh

Nasiri‐Zarandi

2021

COMPEL

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Purpose High torque ripple is the significant challenge of the synchronous reluctance machine in household electric appliances, electric vehicles and so on. This paper aims to present an optimized design of a synchronous reluctance rotor structure to reduce the torque ripple with improving the average torque by the particle swarm optimization (PSO) algorithm. Design/methodology/approach The optimization of rotor geometries has been investigated. Most of the rotor parameters such as the width of iron parts, the width of barriers along d and q axes and the endpoint angle of barriers are optimized by a new method using the PSO algorithm. After optimization, the resulted optimum design along with the initial design is simulated by two-dimensional finite element method and results are compared. At the end, a prototype is constructed and tested. Results of the experiment are compared with the simulation results where acceptable adoption is yielded. Findings Minimizing the torque ripple without losing the average torque is an important achievement of the synchronous reluctance motor (SynRM) optimization; furthermore, the finite element analysis and experimental results indicate that the torque ripple of the SynRM with the optimized rotor is reduced significantly. Also, increasing the number of optimization parameters can effectively obtain an accurate shape of the SynRM barrier. Originality/value Because of the high number of parameters in synchronous reluctance rotors, the majority of proposed optimizations did not use all geometric parameters of the rotor and tried to simplify the optimization by ignoring several optimization parameters or reducing the number of flux barriers. In this optimization, most of the rotor parameters have been used to achieve the precise barrier shape with the aim of reducing the torque ripple in SynRM.

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Energy Efficiency in Variable Speed Centrifugal Chiller Systems Driven by Synchronous Reluctance Motors

Cited by 5 publications

References 9 publications

Indoor Air Quality Control Using Backpropagated Neural Networks

Indoor Air Quality Control Using Backpropagated Neural Networks

C & Circular Shaped Barriers Optimization in a Synchronous Reluctance Rotor for Torque Ripples Minimization

Torque ripples reduction in a synchronous reluctance motor by rotor parameters optimization

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