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Selection Of Crane Duty Motors (Part 3)
Selection Of Crane Duty Motors (On photo: Single girder overhead traveling crane - max. 12.5t, 4-30m of Demag Cranes & Components via DirectIndustry.com) Continued from second part: Selection Of...
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NEMA Definition Of Motor Full Load Nominal Efficency (Standard MG1-12.54.2)
NEMA Definition Of Motor Full Load Nominal Efficency (Standard MG1-12.54.2) - On photo SIEMENS's new Simogear geared motorsNEMA standard MG1-12.54.2Efficiency is defined as the ratio of the power...
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Motor Service Factor (SF) Defined By NEMA
Motor Service Factor (SF) Defined By NEMAPermissible horsepower loadingMotor Service Factor (SF) is the percentage of overloading the motor can handle for short periods when operating normally within...
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7 Most Common Motor Enclosure Types Defined By NEMA Standards
7 Most Common Motor Enclosure Types Defined By NEMA Standards (on photo: Louis Allis Pacemaker Premium NEMA motor - louisallis.com)Important role of enclosureThe enclosure of the motor must protect the...
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Drive Design in Electric Vehicles
Drive Design in Electric Vehicles (on photo by cnet.com.au: Renault Fluence Z.E. presented at the 2011 Melbourne Motor Show)IntroductionGood Evening all, in this session I’m going to present some of...
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Sizing The DOL Motor Starter Parts (Contactor, Fuse, Circuit Breaker and...
Sizing The DOL Motor Starter Parts (Contactor, Fuse, Circuit Breaker and Thermal Overload Relay) Calculate size of each part of DOL motor starter for the system voltage 415V, 5HP three phase house hold...
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Testing and Commissioning Procedure For Motors
Testing and Commissioning Procedure For Motors // Photo by TECO Middle East (TME)Scope Of Motor TestingIt should be noted that the scope of motor testing depends upon the motor type and size, this...
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4 Motor Designs Identified In NEMA MG1
4 Motor Designs Identified In NEMA MG1 (on photo: ABB's three-phase asynchronous electric motors via DirectIndustry.com)It’s all about performance…Performance requirements for various types of...
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Few Words About Stepper Motor (Advantages, Disadvantages and Classification)
Few Words About Stepper Motor (Advantages, Disadvantages and Classification) IntroductionA stepper motor is an electromechanical device which converts electrical pulses into discrete mechanical...
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Identity Card of Every Asynchronous Motor
Identity Card of Every Asynchronous Motor (on photo: ABB AC motor in top lift; by Melissa Blair, BaldorPowerWI via Flickr) Motor parametersA motor is characterized by different electrical and...
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Heat as one of the most common cause of motor failure
Heat as one of the most common cause of motor failure (on photo: burned motor windings due to the overheating; by hybridperformance.blogspot.com)Service lifeHeat is the most common cause of motor...
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Calculating the short-circuit current across the terminals of a synchronous...
Calculating the short-circuit current across the terminals of a synchronous generatorAlternators and motors Calculating the short-circuit current across the terminals of a synchronous generator is very...
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Inspection and test procedures for Rotating Machinery, Synchronous Motors and...
Inspection and test procedures of Rotating Machinery, Synchronous Motors and Generators (On photo: Small machine test set – ee.polyu.edu.hk)Procedures (Index) Visual and Mechanical InspectionElectrical...
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Physical Structure & Configuration of DC Machines
Physical structure and configuration of DC MachinesTwo-pole machineFigure 1 depicts a two-pole machine in which the stator poles are constructed in such a way as to project closer to the rotor than to...
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Motor Starting via Chokes or Resistors
Motor Starting via Chokes or ResistorsReducing the voltage and starting currentThe series-connected chokes (Figure 1) or resistors (Figure 2) reduce the voltage at the motor and hence also the starting...
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PLC application for reduced voltage-start motor control
PLC application for reduced voltage-start motor control (photo credit: plctalk.net)Reduced-voltage-start motor control circuitFigure 1 shown below illustrates the control circuit and wiring diagram of...
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How to measure insulation resistance of a motor
How to measure insulation resistance of a motor (photo credit: elecls.cc.oita-u.ac.jp)Winding insulation resistanceIf the motor is not put into operation immediately upon arrival, it is important to...
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A Few Words About Selecting AC Induction Motors for Cement Plant Applications
Few Words About Selecting AC Induction Motors for Cement Plant Applications (on photo:3,500 kW ball-mill drive for a cement plant in England via emz.de)IntroductionThis technical article relies on the...
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13 features and advances of using electronic soft starters for a motor starting
13 features and advances of using electronic soft starters for a motor starting (on photo: 90kw Soft Starter in powder coated stainless steel cabinet on galvanised frame via...
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8 Energy-Efficiency Improvement Opportunities In Electric Motors
8 Energy-Efficiency Improvement Opportunities In Electric Motors (on photo: Traction motor cooling blower motor and impeller covered by a hood; via irfca.org)Energy Saving OpportunitiesWhen considering...
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