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Energy Efficiency Aspects of Electric Motors
Energy Efficiency Aspects of Motors (photo credit: stiavelli.com)Load EfficiencyThree-phase squirrel-cage induction motors comprise a considerable percentage of the electrical load in the United...
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14 energy-efficiency improvement opportunities in pumping systems
14 energy-efficiency improvement opportunities in pumping systems (on photo: Dakota Pump Packaged Wastewater Pumping Systems via hennesymech.com)Detailed energy assessmentPump systems consist of pumps,...
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Characteristics And Work Principles of Switched Reluctance (SR) Motor
Characteristics And Work Principles of Switched Reluctance (SR) Motor (photo credit: machinedesign.com)SR Motor CharacteristicsThe Switched Reluctance (SR) motor is very different from the other...
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PLC Implementation Of Forward/Reverse Motor Circuit With Interlocking
PLC Application For Forward/Reverse Motor Circuit (on photo: VARICON – Three-phase AC motor with integrated frequency inverter via usinenouvelle.com)Forward/Reverse Motor InterlockingFigure 1...
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8 NEC Basic Feeder Circuit Sizing Requirements
8 NEC Basic Feeder Circuit Sizing Requirements (photo credit: acs-mtv.com)Feeder circuit loadsOnce the branch circuit loads are calculated, the feeder circuit loads may be calculated by applying demand...
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When to Buy Premium Efficiency Motors?
When to Buy Premium Efficiency Motors? (photo credit: traveridc.com)Reducing Operating CostsUsing premium efficiency motors can reduce your operating costs in several ways. Not only does saving energy...
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4 Types of DC Motors and Their Characteristics
4 Types of DC Motors and Their Characteristics (on photo: Incline Conveyor 72″ Long 7″ Wide 90 Volt DC Motor; credit: globalmachinebrokers.com)CharacteristicsAs you already know, there are two...
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The Most Common LV/MV Motor Starting Devices
The Most Common LV/MV Motor Starting Devices (on photo: Allen Bradley contactor)Two-state ON-OFF deviceThe most common motor starting device is the low voltage motor-starting contactor. A contactor is...
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Comparison of Motor Speed Control Methods
Comparison of Motor Speed Control Methods (on photo: single motor variable speed drive for three pocket washer-extractors; via edrodynawash.com)Why motor speed control?It is often desirable to control...
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What To Check When Commissioning Variable Speed Drives
What To Check When Commissioning Variable Speed Drives (on photo: Control techniques drives at Michelin; by emersonindustrial.com)The purpose of commissioning VSDsThe main purpose of commissioning VSDs...
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Motor Connection for Clockwise and Counterclockwise Direction of Rotation
Motor Connection for Clockwise and Counterclockwise Direction of Rotation (photo credit: johndearmond.com)Star-delta (Y-Δ, wye-delta) startingStar-delta (in North America the designation “wye-delta” is...
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Basics of Built-in Motor Protection for Beginners
Basics of Built-in Motor Protection for Beginners (photo credit: johndearmond.com)Why is motor protection necessary?In order to avoid unexpected breakdowns, costly repairs and subsequent losses due to...
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5 Most Common Motor Load Types
5 Most Common Motor Load Types (on photo: Single Stage Industrial Centrifugal Pumps; credit: dezdokht.com)Load profile (speed range, torque and power)Certain load types are characteristic in the...
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Basics of DC Motors For Electrical Engineers – Beginners
Basics of DC Motors For Electrical Engineers – Beginners (on photo: Small DC motor; via Wikimedia)General about DC motorsSeparate field excitation DC motors are still sometimes used for driving...
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Calculation of motor starting time as first approximation
Motor starting operationsThe problems connected to motor starting operations are fundamentally linked to the type of motor which a determined motor operational torque “CM” offers, to the starting...
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Comparision of Direct-on-line (DOL) and Star-delta Motor Starting
Motor starting methods //Direct-on-line (DOL) startingAdvantagesDrawbacksStar-delta startingAdvantagesDrawbacksComparision of DOL and Star-delta starting Direct-on-line starting (DOL)As the name...
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Comparison of Soft Starting and Frequency Converter Motor Starting
Soft startingA soft starter is, as you would expect, a device which ensures a soft starting of a motor.A softstarter has different characteristics to the other starting methods. It has thyristors in...
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19 Essential Information You Can Find On Motor Nameplate
Understanding motor’s nameplateMotor nameplate is normally located on all produced electric motors. Understanding nameplate information can be hard sometimes, but is essential. In most countries it is...
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Troubleshooting An Open Circuit Faults in the Control Circuit
General Troubleshooting Procedure //Symptom // – The machine does not start when the start button is pressedAt this point the problem could be mechanical or electrical. We will focus on just the...
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Electrical Braking Of Asynchronous Motors – The Guidelines
Electrical braking of 3-phase motor // In many industrial systems, motors are stopped simply by natural deceleration. The time this takes depends solely on the inertia and resistive torque of the...
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