نتایج جستجو برای: induction motors
تعداد نتایج: 209773 فیلتر نتایج به سال:
Object of research: induction submersible electric motor as a part drive centrifugal pump.
 Subject the non-nominal operation modes motors, including wedging.
 Purpose creation research methodology motors at operation, variation frequency feeding voltage and its magnitude.
 Methods theory electromechanical transformation energy, digital modeling, statistical data processing, meth...
Single-phase induction motors are widely used today. A single-phase motor is operated using a inverter. The inverter consists of four MOSFETs, two for the high side and low side. constant speed motor. As corollary, control Single-Phase Induction becomes very important necessity. Speed can be done in many ways. method followed this paper voltage control/ (V/F Control). By controlling duty cycle ...
This paper provides a comprehensive list of books, workshops, conferences, and journal papers related to induction motors faults detection and diagnosis.
In conventional direct torque control (DTC) of induction machines, undesirable flux and torque ripples are produced. These occur since non of the selected inverter's voltage vectors are able to generate the exact voltage required to produce the desired changes in the electromagnetic torque and stator flux linkage in most of the switching instances. In addition, when direct torque control is imp...
Comparison between the results from the design procedure based upon the value of D2L (volume of iron) and IEC standard used by manufacturers indicates that the basic design equation of electrical machines must be modified by a proper modification factor. This modification factor is evaluated for single- and three-phase induction motors and its variation with motor rating and poles number is obt...
This paper uses the flux-MMF diagram to compare and contrast the torque production mechanism in seven common types of electric motor. The flux-mmf diagram is a generaked version of the flux-linkage versus current (+i) diagram €or switched-reluctance motors. It is illustrated €or switchedreluctance, synchronous-reluctance, induction, brushless ac, brushless dc, interior PM and dc commutator moto...
In the above paper, the author claims that by using the square of the flux magnitude, he is able to develop a nonsingular controller which requires less computation than the standard fieldoriented controller. The purpose of this letter is point out that these claims are incorrect.
It has been proven that fuzzy controllers are capable of controlling non-linear systems where it is cumbersome to develop conventional controllers based on mathematical modeling. This chapter describes designing fuzzy controllers for an AC motor run mechanism. It also compares performance of two controllers designed based on Mamdani and Takagi-Sugeno with the conventional control scheme in a sh...
A method to estimate the flux-linkages and parameters of induction motors with skewed rotor bars is presented. The proposed method is based directly on a multi-slice time stepping finite element model, hence the effects of saturation, eddy-current, skewed rotor bars and high-order harmonic fields, can all be included readily in the solution. Special formulas for calculating rotor currents, roto...
Induction motors are still the most used in industrial applications due to simplicity of installation and low maintenance cost, especially for squirrel cage type. The significant development power electronics terms high-speed technologies electronic switches, their availability high ratings, considerable decrease cost components supports this increase uses. However, changing induction motor's s...
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