Optimal starting frequency of three‐phase induction motor

Chen, Haixu; Bi, Chuan‐Xing

doi:10.1049/elp2.12159

Cited by 3 publications

(4 citation statements)

References 30 publications

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“…To describe the induction motor of the pumping unit, we employ the T-type equivalent circuit model [6] as depicted in Figure 4. Given that oil wells can be situated in remote locations, we have enhanced the T-type model by incorporating additional elements, specifically R S , R L , and X L , to account for supplementary losses arising from feeding line resistance and inductance, respectively.…”

Section: B Model Of Induction Motormentioning

confidence: 99%

Improving the Estimation of a Sucker Rod Pumping Dynamometer Card Based on the Terminal Quantities of the Driving Motor

Silva,

Cerqueira,

Oliveira

et al. 2023

IEEE Access

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Rod pumping systems typically require the analysis of dynamometer cards for fault diagnosis. While external instrumentation assists in obtaining these cards, it simultaneously raises monitoring costs and complexity. To address this issue, this paper introduces a parameter estimator that integrates the equivalent circuit model of an induction motor with the beam pumping unit model. We have compared the performance of two practical estimators, utilizing the terminal quantities of the driving motor as inputs. The results demonstrate surface dynamometer cards under varying operational conditions of the oil well. By augmenting the estimator's input variables, the estimated cards align more closely with the actual ones. This practical application proposes an alternative method for acquiring the surface dynamometer card, which can function as a supplementary approach in fault diagnostics and contribute to informed maintenance decisions for the pumping unit.

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Section: B Model Of Induction Motormentioning

confidence: 99%

Improving the Estimation of a Sucker Rod Pumping Dynamometer Card Based on the Terminal Quantities of the Driving Motor

Silva,

Cerqueira,

Oliveira

et al. 2023

IEEE Access

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“…Other equipment used to improve the energy performance of an asynchronous electric drive during start-up includes devices that allow adjusting the voltage at the motor terminals, and, accordingly, controlling the start and stop of the drive, and provide energy savings by reducing the voltage on an underloaded motor [20][21][22].…”

Section: Literature Reviewmentioning

confidence: 99%

Investigation of energy parameters of a compensated asynchronous motor in the mode of repeated short-term starts

Kaplun¹,

Chuenko²,

Makarevych³

2022

Tehnìka ta energetika

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The study is devoted to energy efficiency control of squirrel-cage induction motors of low and medium power and is a continuation of development of the theory of compensated induction motors. The aim of the research is to substantiate the influence of capacitance value on compensation of internal capacitive reactive power of induction motor in starting mode. The mathematical modeling of compensated induction motor allowed us to study quasitransient electromagnetic processes taking into account spatial and temporal directionality of currents of main and additional windings of stator and rotor phases of compensated induction motor. Achievement of the objective is based on the establishment of regularities of influence of compensating capacitance value on energy characteristics of a compensated induction motor during its start-up and achievement of nominal electromagnetic torque on the rotor shaft. Numerical modeling is performed at spatial displacement of phase axes of main and additional phase windings of stator of compensated induction motor by 30°. It provides equality of currents of main and auxiliary stator windings of CAM. As shown by numerical experiment, changing the value of compensation capacitance gives an idea of the conditions for ensuring normal excitation mode of such electrical device. Provision of normal excitation at start-up of a compensated induction motor leads to changes in energy parameters of the machine - minimization of power losses in windings and reactive power consumed by the motor and increase of its power factor. It has been established that the value of compensation capacitance required to ensure normal excitation mode at start-up and steady-state normal mode of a compensated induction motor is different. As a result of simulation, it was found that to ensure energy-efficient starting mode and acceleration to nominal slip, the value of compensating capacity of induction motor should be almost 5 times greater than for the steady-state nominal mode. The results of these studies can be useful for improving the energy efficiency of microgrids with small and medium capacity induction motors.

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“…D is the viscous friction torque coefficient in [𝑁. 𝑚/(𝑟𝑎𝑑./𝑠𝑒𝑐. )] and can be calculated as (76) [28]- [30]:…”

Section: The Turbine-generator Dynamic Modelmentioning

confidence: 99%

“…An accurate dynamical model of induction generator utilized in wind energy systems (Bilal AbdullahNasir) 1191 𝑠ℓ = (𝜔 𝑠 − 𝜔 𝑟 ) slip speed in rad/sec(30) Where 𝜔 𝑟 is the generator shaft speed in electrical radian/sec. 𝐿 𝑚𝑑 and 𝐿 𝑚𝑞 are D-and Q-axes components of magnetizing inductance.…”

mentioning

confidence: 99%

An accurate dynamical model of induction generator utilized in wind energy systems

Nasir

2022

IJEECS

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Due to the advantages of a self-excited induction generator (SEIG), it plays a main role in sources of renewable energy, such as wind turbines (WT). The regulation of terminal voltage and frequency is poor under variable rotor speed and load conditions at stand-alone operation mode. The generator terminal voltage depends on the excitation capacitance which can be controlled by a capacitor bank and static voltage compensator. The dynamical model of the machine is described by differential equations in D-Q axes transformations of the synchronously rotating frame. Many models of analysis are proposed in the literature. In those models, several approximations are used to simplify the process of calculations, such as neglecting the iron core resistance, stray load resistance, stator and rotor leakage reactance, and magnetic saturation. In this work, a comprehensive dynamic model of the SEIG-WT is performed to analyze the system performance under transient and steady-state conditions. This dynamic model considers the effect of all machine parameters variation. New analytical formulas are used for to accurate calculation of minimum and maximum values of excitation capacitance and generator rotor cut-off and maximum speed. The dynamic model results are partially compared with experimental results, and accurate agreement is shown.

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Optimal starting frequency of three‐phase induction motor

Cited by 3 publications

References 30 publications

Improving the Estimation of a Sucker Rod Pumping Dynamometer Card Based on the Terminal Quantities of the Driving Motor

Improving the Estimation of a Sucker Rod Pumping Dynamometer Card Based on the Terminal Quantities of the Driving Motor

Investigation of energy parameters of a compensated asynchronous motor in the mode of repeated short-term starts

An accurate dynamical model of induction generator utilized in wind energy systems

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