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Variable-frequency drive

About: Variable-frequency drive is a research topic. Over the lifetime, 837 publications have been published within this topic receiving 5691 citations. The topic is also known as: VFD.


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Proceedings ArticleDOI
09 Nov 2022
TL;DR: In this article , the system of automated electric drive of the main slurry pump station at a diamond treatment plant via computer modeling in the MatLab software package is presented. But the authors used the established methods of constructing a computer model that is capable of producing steady-state operation parameters for the pump unit when the fluid level in the sump is stabilized.
Abstract: This article reviews the system of automated electric drive of the main slurry pump station at a diamond treatment plant via computer modeling in the MatLab software package. The authors used the established methods of constructing a computer model that is capable of producing steady-state operation parameters for the pump unit when the fluid level in the sump is stabilized. They improved this model by introducing a module to account for the system's behavior when the electric drive speed is below the pump speed limit. This allowed obtaining additional transient process diagrams for the controlled physical parameters of the pump. The authors calculated and demonstrated the energy efficiency of using the variable-frequency electric drive in the slurry pump station at a diamond treatment plant.
Patent
15 Mar 2018
TL;DR: In this paper, a cooling circuit for a variable frequency drive (VFD) in an HVACR system is described, where the controller determines whether a temperature of the heat sink is greater than or equal to a heat sink temperature threshold.
Abstract: Systems and methods for controlling a cooling circuit for a variable frequency drive (VFD) in an HVACR system are disclosed. The method includes determining, by a controller, an operating condition of a heat sink associated with the VFD. The controller determines whether a temperature of the heat sink is greater than or equal to a heat sink temperature threshold. The method further includes enabling a bypass flow control device in response to the heat sink temperature being greater than or equal to the heat sink temperature threshold.
Journal Article
TL;DR: In this paper, the benefits of medium voltage variable frequency drives compared to classical drivers or control methods (i.e., steam/gas turbines, hydraulic coupling and Direct-On-Line operation with, for example, valve/damper control) are outlined.
Abstract: This paper first outlines the benefits of medium voltage variable frequency drives compared to classical drivers or control methods (i.e. steam/gas turbines, hydraulic coupling and Direct-On-Line operation with, for example, valve/damper control). The paper then focuses on typical variable frequency drive applications in the sugar industry and also describes two real cases, namely an ABB drive system used in a soft-starter application at Al Khaleej Sugar Refinery, Dubai, UAE and the replacement of inefficient steam turbines for cane mill drives at Compania Azucarera Hondurena S.A, Honduras, Central America (which produced significant returns of additional 1 million U$/year). Next, the main selection criteria for a medium voltage drive system are described.
Patent
12 May 2020
TL;DR: In this article, a subsea power cell for converting an electrical three phase input into an electrical one phase output, including the capacitor bank, a diode rectifier, and a plurality of insulated gate bipolar transistors, is described.
Abstract: A capacitor bank includes a plurality of capacitors; a plurality of resistors, each of the capacitors being in series with at least one of the resistors; and a plurality of diodes, each of the diodes being in parallel with one of the resistors. A subsea power cell for converting an electrical three phase input into an electrical one phase output, includes the capacitor bank; a diode rectifier connected to the three phase input; and a plurality of Insulated Gate Bipolar Transistors connected to the electrical one phase output.
Proceedings ArticleDOI
01 Feb 2018
TL;DR: In this paper, a Space Vector Modulation (SVM) control of matrix converter for high rated three phase induction motors (traction motor) speed control which requires the high starting torque characteristics and also approximately zero steady-state speed deviations at any desired frequency.
Abstract: This paper presents the Space Vector Modulation (SVM) control of Matrix converter for high rated three phase induction motors (traction motor) speed control which requires the high starting torque characteristics and also approximately zero steady-state speed deviations at any desired frequency. Power Electronic and drive motion control have emerged as an essential technology in the industrial revolution and automation. Most of the industrial drive practices are of constant torque type and needs to drive such loads at different speeds. Hence, generation of the supply with Variable Voltage Variable Frequency (VVVF) is essential to maintain the stator side flux magnitude as constant. The constant Voltage per frequency (V/f) method (or) popularly known as Volts per hertz method by SVM Control of Matrix Converter (MC) in used as control scheme to achieve a better controlling over the conventional AC-DC-AC drive for VVVF. This proposed scheme gives the complete compensation for Current-Resistance i.e., voltage drop $(\mathbf{I}^{*}\mathbf{R})$ , by vectorially adjusting the stator side voltages of Traction motor drive and keeping the magnitude of the stator side flux almost constant irrespective of changes in frequency or even for variation of load. The results presented in the paper for proposed method shows that the motor speed of the traction motor can be controlled accurately almost with almost zero equilibrium state / null study state error and reducing frequency to at least 7.1 Hz. The results clearly illustrate the starting torque of Traction Motor Drive more than 2.5 times rated value for 215 HP (160 kW) induction motor drive. Modeling and design of the proposed MC converter implemented in MATLAB/Simulink environment.

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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20239
202220
202143
202084
201956
201887