Design Criteria and Range Limits in The Development of Controlled Induction Motors

Petrushin, V. S.; Vodichev, Vladimir; Yenoktaiev, Rostislav

doi:10.15676/ijeei.2019.11.2.15

Cited by 2 publications

(3 citation statements)

References 2 publications

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“…When modifying the RC criterion of an electric drive [16,17], it is necessary to take into account the effect of inflationary processes upon the criterion, since the standard payback periods for the CAED are quite long (5-8 years). In the general case, when the total drive cost cep is known (in the general case, in addition to the cost of asynchronous motors and converters, it includes also the cost of matching transformers and gearboxes, as well as the cost of network chokes or filters) and the cost of money is constant, the value of the criterion is determined as…”

Section: Theoretical Definition Of Criteriamentioning

confidence: 99%

Discounted Costs Range Criterion Modification for Controlled Asynchronous Electric Drives

Petrushin,

Plotkin,

Almuratova

et al. 2023

Energies

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A range criterion of discounted costs is proposed, which takes into account all costs for a speed-controlled asynchronous electric drive, including its price, costs of losses and maintenance, and amortization charges. It is also possible to take into account the cost and energy performance of matching transformers and gearboxes. Costs for reactive power compensation of both the first and second kind (due to the presence of harmonic components at the drive input) are taken into account. The latter requires determining the total harmonic distortion (THD) of the currents consumed by the drive. In the case of autonomous power systems, it is also necessary to determine the drive’s supplying voltage non-linear distortion coefficients. Representing the discounted costs as the sum of initial capital investments and annual costs made possible taking into account the presence of inflationary processes. The control characteristics of the active power consumed by the drive, efficiency, power factor, and phase shift factor are constructed, which are dependencies on the rotation frequency in a certain control range at a specific load. It is proposed to calculate the drive’s discounted costs criterion, depending on the operating mode of the load. According to the mode, the criterion is calculated as an average range in a certain range of speed control or is determined taking into account a given tachogram of speed changes. For the controlled asynchronous drive under consideration, the discounted costs are 4148 c.u. in the first case and 5139.3 c.u. in the second case. If inflationary processes are taken into account, the first case is 4219.4 c.u. and the second case is 5227.7 c.u., respectively.

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Section: Theoretical Definition Of Criteriamentioning

confidence: 99%

Discounted Costs Range Criterion Modification for Controlled Asynchronous Electric Drives

Petrushin,

Plotkin,

Almuratova

et al. 2023

Energies

View full text Add to dashboard Cite

show abstract

“…Literature review. A number of works are devoted to the problem of energy indicators, distribution of electrical param eters and power in the induction machine [2,5,6]. Thus, the method of estimation of energy indicators and criteria de pending on the chosen criterion and design task at the devel opment of induction machines is considered in [2].…”

mentioning

confidence: 99%

“…Thus, the method of estimation of energy indicators and criteria de pending on the chosen criterion and design task at the devel opment of induction machines is considered in [2]. The issues of research on energy and electromechanical processes of the induction machine are considered in [5]. The power balance is calculated taking into account the losses in the stator and rotor copper, as well as in the stator steel.…”

mentioning

confidence: 99%

Influence of misalignment of connection of electrical machine shafts on the nature of electric power of the induction motor

Bialobrzheskyi¹,

Nozhenko²,

Todorov³

2022

Nauk. visn. nat. hirn. univ.

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Purpose. To identify the vibration power components caused by misalignment of electrical machine shafts in the instantaneous power of the induction motor. Methodology. The power components of the induction motor are analytically determined taking into account the power caused by torque vibrations on the shaft. Based on this, using the methods of mathematical modelling in the visual programming environment, the known model of a three-phase induction motor with a short-circuited rotor has been made. In addition, elements and connections are introduced which realize the formation of the moment caused by the imbalance of rotating masses. Using Fourier transform of the electric power of the induction motor, we determine its discrete spectrum. Experimental research is conducted on the electric power of the induction motor with a short-circuited rotor, in similar model conditions, on laboratory equipment. With the use of a virtual device synthesized in the LabVIEW package, the wavelet analysis of stator electric power of the motor of laboratory electrotechnical complex is performed. Findings. Differential equations of the induction motor with a short-circuited rotor in abc coordinate system are obtained, which reflect the distribution of instantaneous power in the machine taking into account the vibration moment. As a result of modelling according to the specified equations of the induction machine, in the conditions of full symmetry of parameters of the scheme and the mode with eccentricity of rotating masses, low-frequency vibrations of electric power of a stator with frequency of 25 Hz have been found. Similar results were obtained as a result of wavelet analysis of the electric power of an induction motor of a laboratory electrotechnical complex. Originality. Rationality of use of instantaneous electrical power of induction motor stator for detection of vibration caused by misalignment between its shaft and the shaft of another machine has been substantiated, which allows detecting vibration without complex methods of measuring vibration displacement and its derivatives. Practical value. Detecting vibration by measuring the electrical parameters of the stator circuit of the induction motor and determining the vibrations of its instantaneous power without the use of specialized equipment significantly simplify the procedure of vibration diagnostics at its early stages.

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Design Criteria and Range Limits in The Development of Controlled Induction Motors

Cited by 2 publications

References 2 publications

Discounted Costs Range Criterion Modification for Controlled Asynchronous Electric Drives

Discounted Costs Range Criterion Modification for Controlled Asynchronous Electric Drives

Influence of misalignment of connection of electrical machine shafts on the nature of electric power of the induction motor

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