Calculation of Rotor Currents of Single-phase Synchronous Reluctance Motor Using<i>d</i>-<i>q</i>Harmonic Balance Techniques

Summary The efficiency of the motor is of paramount importance during selection and operation as well as energy consumption. In countries like India, international efficiency class (IE2) is versatile in use. Prominent efficiency improvements can produce very large energy savings across the country. Induction motors (IMs) are widely used for pump applications in India. IM exhibits high rotor (I2R) losses due to the presence of rotor current. This results in less efficient, more energy consumption compared with energy‐efficient motors. Energy‐efficient motor such has single phase direct‐on‐line synchronous reluctance motor (DOL‐SynRM) would be a right alternative for IM due to the absence of rotor current. DOL‐SynRM has been designed, optimized, and tested for a centrifugal pump application. Initially, single phase SynRM with capacitor start and capacitor run is modeled using equivalent circuit parameters and simultaneously simulated using MATLAB. The machine parameters like rib width, length, and thickness are optimized using genetic algorithm technique. The optimized rotor structures are taken to numerical analysis platform for performance prediction. The flux distribution, moment of inertia, air gap flux density, the effect on the inductances, starting torque, average torque, and torque ripple are thoroughly investigated using this analysis. The high‐efficiency rotor structure is fabricated and configured with a centrifugal pump. Experimental results reveal that the overall system efficiency has been improved compared with the existing induction motor. Moreover, thermal analysis is carried out for two types of frame structures (conventional and proposed) to study the hot spot in the proposed motor.

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“…The following d‐q equations for a capacitor‐start, capacitor‐run DOL‐SynRM were derived in as follows:

u_{qs} = r_{cc} i_{qs} + r_{ce} i_{ds} + ω_{r} ψ_{ds} + p ψ_{qs} + u_{fq},

u_{ds} = r_{ee} i_{ds} + r_{ce} i_{qs} - ω_{r} ψ_{qs} + p ψ_{ds} + u_{fd},

u_{dr}^{'} = r_{dr}^{'} i_{dr}^{'} + p ψ_{dr}^{'},

u_{qr}^{'} = r_{qr}^{'} i_{qr}^{'} + p ψ_{qr}^{'},

{pu}_{fq} = - ω_{r} u_{fd} + C_{cc} i_{qs} - C_{ce} i_{ds},

{pu}_{fd} = - ω_{r} u_{fq} + C_{ee} i_{ds} - C_{ce} i_{qs},

where the flux linkages are given by …”

Section: Modeling Of Dol‐synrmmentioning

confidence: 99%

“…The following d-q equations for a capacitor-start, capacitor-run DOL-SynRM were derived in as follows 10 :…”

Section: Modeling Of Dol-synrmmentioning

confidence: 99%

Single‐phase direct‐on‐line synchronous motor for a specific application in comparison with an induction motor

Ganesan

Lenin

2019

Int Trans Electr Energ Syst

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“…In the past, Miller [6] developed a unified tactic in the analysis *Corresponding Author of single-phase (1-Φ) machines conditioned on Fortescu's symmetrical component method which gave room for the application of intuitive reasoning. In like manner, [7] looked at the deployment of the technique in rotor current evaluation in respect of single-phase synchronous reluctance motor. However, this work attempts to present a detailed analytical model that will adequately predict single-phase machine IPM motor characteristics at a wide range of operating condition.…”

Section: Introductionmentioning

confidence: 99%

Steady State Analysis Of Single Phase IPM Motors By D-Q Harmonic Balance Method

Jude

Emeka

Damian

et al. 2021

Int. j. electr. comput. eng. syst. (Online)

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A concise steady-state analysis of a single-phase line-start permanent magnet (SPLSPM) machine is conducted from a developed d-q model using the d-q harmonic balance technique. The d-q model was developed in rotor reference frame from a phase variable model of the machine. SPLSPM whose performance indices were characterized by high torque ripples has detailed analysis docile mostly in computer simulations quite unlike the three-phase types. The main cause is not far-fetched, it was due to nonexistence of precise mathematical model in d-q rotor frame of the motor due to the unbalanced field winding, the rotor saliency and the presence of the capacitor in the auxiliary windings. Even after model has been developed, the simple traditional procedure of setting all time varying component to zero for steady-state analysis fails because the rotor position dependence on the inductance expressions could not be eliminated. The d-q harmonic-balance technique was then applied. An important feature of the harmonic balance technique was that it decoupled all equations to simple sine waveforms in a style that resembled Fourier series. Results yield torque pulsation, current and load characteristics in the steady state.

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A Hybrid Interior Rotor High-performance Line Start Permanent Magnet Synchronous Motor

Ugale

Chaudhari

Baka

et al. 2014

Electric Power Components and Systems

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Calculation of Rotor Currents of Single-phase Synchronous Reluctance Motor Usingd-qHarmonic Balance Techniques

Cited by 3 publications

References 8 publications

Single‐phase direct‐on‐line synchronous motor for a specific application in comparison with an induction motor

Single‐phase direct‐on‐line synchronous motor for a specific application in comparison with an induction motor

Steady State Analysis Of Single Phase IPM Motors By D-Q Harmonic Balance Method

A Hybrid Interior Rotor High-performance Line Start Permanent Magnet Synchronous Motor

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