System for measuring and analysis of vibration in electric motors of irrigation facilities

Djalilov, A; Matchonov, O.; Abubakirov, A.B.; Abdunabiev, J; Saidov, Abdusobir

doi:10.1088/1755-1315/868/1/012032

Cited by 4 publications

(3 citation statements)

References 1 publication

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“…At the constant operation of the fans of the cooling system of transformers with a capacity of 10 mVA, the loss of electrical energy is within 16000 kWh/year [26,27,28]. To reduce energy losses, the fans of the transformer cooling system are switched on in stages: one group of fans is switched on at a temperature of 70-75 0 С, the second group of fans is switched on at a temperature of 80-85 0 С, and the third group of fans is switched on at a temperature of 90-95 0 С.…”

Section: Research Results Recommendations and Suggestionsmentioning

confidence: 99%

Increasing reliability of power supply to electricity consumers

Isakov,

Raxmatov,

Ochilov

et al. 2023

E3S Web of Conf.

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The article deals with the issues of increasing the reliability of power transformers used in power supply systems for agriculture and water management. Also, the degree of damage to power transformers was studied in terms of the physical and chemical composition of transformer oil, materials were given for assessing the state of insulation by the degree of damage to the insulation of individual units of the power transformer. By measuring the temperature of the most heated part and the chemical composition of the transformer oil, it is possible to determine the degree of wear of the insulation of the power transformer in the operating mode, which allows to increase their service life by 15% and prevent accidents in the networks.

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Section: Research Results Recommendations and Suggestionsmentioning

confidence: 99%

Increasing reliability of power supply to electricity consumers

Isakov,

Raxmatov,

Ochilov

et al. 2023

E3S Web of Conf.

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“…Signaling conversion process. The study of the dynamic characteristics of sensors for converting reactive power sources of PSS of primary currents into secondary voltages must be determined, Iэ -sensor with primary currents, Uэч -generation of output voltages, Фµmagnetic sensitive elements, SСЭ -cross-sectional area, wсэ -number of turns of the sensing element, depend whether the geometric dimensions of the section lх.о where the sensitive elements are located in the magnetic replaceable part, from the allowable ranges of change and variable geometric dimensions of the magnetic circuit [1][2][3].…”

Section: Methodsmentioning

confidence: 99%

“…When analyzing sources of errors that negatively affect the process of signal conversion, it is necessary to separate them into primary and secondary sources of errors based on the function of determining the accuracy of the sensor. It is known that the main sources of errors are identified under normal conditions of use of primary measuring-variable sensors [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Errors of sensors for conversion of multi-phase currents into voltage in power supply systems

Abubakirov

Sadikov²,

Ramazonov

et al. 2023

E3S Web Conf.

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The paper presents the structure of the sensor for converting multi-phase primary currents into secondary voltages of reactive power of power supply networks, the algorithm for modeling processes in the sensor that sends a signal to the primary current monitoring and control devices provides a highly formalized graph model based on an analytical expression, static characteristics and sensor errors studied on the basis of its analytic expression.

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Frequency control of asynchronous motor for an irrigation pump of machine irrigation systems

et al. 2023

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The working state of freguency-operated asinchronous motor of irrigation pump in the closed system with feedback by velocity are considered. The system issue coefficient, provided a constancy of given value, loading coefficient of motor for voltage control pro rata control freguency are determined. Let us consider the static mode of operation of a frequency-controlled AM in a closed system with speed feedback. A decrease in the rotation speed in irrigation pumps to regulate their productivity is possible up to a certain minimum value, at which the pump head (H) becomes equal to the static head (Hst). The pump output (Q) then drops to zero. The value “k” has been determined, which ensures the constancy of the AM overload factor over the entire range of control frequency change in a closed-loop frequency control system with feedback on the engine speed.

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System for measuring and analysis of vibration in electric motors of irrigation facilities

Cited by 4 publications

References 1 publication

Increasing reliability of power supply to electricity consumers

Increasing reliability of power supply to electricity consumers

Errors of sensors for conversion of multi-phase currents into voltage in power supply systems

Frequency control of asynchronous motor for an irrigation pump of machine irrigation systems

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