Multiband current transformers

Amirov, Sulton; Khushbokov, B. Kh.; Balgaev, N. E.

doi:10.3103/s1068371209020126

Cited by 5 publications

(5 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When the first pulse is applied to the engine winding, a transient process occurs, described by expression (7). In accordance with this, the current in the motor winding will increase to the conditional value i, then the voltage supply to the winding stops, and the current in the motor winding will begin to change according to expression (8) to the value i1. Next, the next voltage pulse is applied to the motor winding, a little more than the first pulse, and the current in the motor winding will begin to increase to the value i �� i � .…”

Section: Resultsmentioning

confidence: 95%

Monitoring and control of the protection system of electric drives with the method of pulse-width modulation

Ataullaev,

Nizomova,

Norqulov

2023

E3S Web Conf.

View full text Add to dashboard Cite

This article deals with increasing the stability of power supply by improving the protection and control of electric drives using the pulsewidth modulation (PWM) method. The method consists in the formation of periodic series of pulses of a certain duty cycle, creating separately positive and negative half-waves of the current sinusoid in the motor windings. The PWM method of base vectors (vector modulation) consists in switching between several pre-selected states of the inverter, each of which corresponds to a certain spatial position of the resulting voltage vector applied to the engine. In the PWM method, each phase zone is divided into 3 subzones with its own duty cycle. This method is suitable for both three-stage inverter and six-stage inverter. It can be seen in the work that the quality of the resulting current depends not only on the number of subzones for the formation of base vectors, but also on the number of voltage pulses per subzone. The more pulses fall on the formation subzone, the cleaner the resulting current curve is.

show abstract

Section: Resultsmentioning

confidence: 95%

Monitoring and control of the protection system of electric drives with the method of pulse-width modulation

Ataullaev,

Nizomova,

Norqulov

2023

E3S Web Conf.

View full text Add to dashboard Cite

show abstract

“…In this regard, the authors propose a different design of a device with advanced functionality designed to detect the asymmetry of three-phase currents [6].…”

Section: Resultsmentioning

confidence: 99%

“…Currently, to identify the asymmetry of three-phase currents, CMC are used, having various designs based on various physical effects (on the magneto modulation effect, Hall effect, transformer effect, etc.) [5][6][7][8][9][10].…”

Section: Methodsmentioning

confidence: 99%

A device for detecting current asymmetry in a three-phase alternating current system

et al. 2023

View full text Add to dashboard Cite

The article discusses the issues of identifying the asymmetry of currents in a three-phase alternating current system. The design of a current converter designed to detect the unevenness of the current load in parallel branches of the current lines of various power equipment is proposed. It is shown that a positive effect is achieved by making the magnetic circuit four-rod and the introduction of rectangular cutouts with modulating and output windings on two central rods of the magnetic circuit and it is possible to determine the unevenness of the current load of three parallel branches before (in three-phase AC circuits) or after rectifier-converter installations (in DC circuits), therefore, the functionality of the device for detecting current asymmetry is expanded.

show abstract

“…Let us give examples of the calculation and comparative evaluation of the reliability indicators of the three ferromagnetic current converters proposed by us with an adjustable range [4,5,6]. In total, failures of elements of the PMT were observed.…”

Section: The Main Findings and Resultsmentioning

confidence: 99%

Mathematical Modeling of the Reliability of Ferromagnetic Current Converters with Adjustable Range for Traction Power Supply Devices

2022

IJMRA

View full text Add to dashboard Cite

The factors affecting the operational reliability of primary measuring transducers (PMT) developed on the basis of ferromagnetic current transducers with adjustable range (FMCT RD) are highlighted. An assessment and analysis of the system of basic quantitative indicators of reliability for each of the proposed three current converters, which differ in the principles of operation and the number of assembly units, is made. A maintenance and repair strategy is indicated, combined with the use of methods and tools of a modern diagnostic system that ensures the reliability of these converters, using a combination of three groups of stages: during design, during their operation and repair.

show abstract

Multiband current transformers

Cited by 5 publications

References 0 publications

Monitoring and control of the protection system of electric drives with the method of pulse-width modulation

Monitoring and control of the protection system of electric drives with the method of pulse-width modulation

A device for detecting current asymmetry in a three-phase alternating current system

Mathematical Modeling of the Reliability of Ferromagnetic Current Converters with Adjustable Range for Traction Power Supply Devices

Contact Info

Product

Resources

About