Electric Motor
When a 3-phase motor expirience phase failure, what a mess…
A phase failure is an interruption of a single conductor. The motor then continues running with two phases and can suffer damage. The cause is, for example, blown fuse. Small… Read more
Feb 15, 2016 | By Edvard
Electric Motor
Protection schemes for generators and motors
It is difficult to define precisely the protection schemes that should be adopted for an electricity distribution system, given the large number of valid alternatives for each situation, but some… Read more
Jan 15, 2016 | By Edvard
Electric Motor
Five factors that mess up motor efficiency and how to improve it
It must be emphasised that the standard electric motor is already a very efficient device with efficiencies above 80% over most of the working range, rising to over 90% at… Read more
Dec 23, 2015 | By Edvard
Electric Motor
The Design Basics Of Motor Protection Circuit Breaker
Application-specific variations of the MCCB, these breakers combine the short-circuit and isolation functionality of the MCCB with the motor overcurrent protection of a traditional overload relay. MPCBs are UL 489 Listed… Read more
Dec 07, 2015 | By Edvard
Electric Motor
PLC Ladder Diagrams for Electrical Engineers (Beginners)
As an introduction to ladder diagrams, consider the simple wiring diagram for an electrical circuit in Figure 1a. The diagram shows the circuit for switching on or off an electric… Read more
Nov 30, 2015 | By Edvard
Electric Motor
Comparison of 4 Different Flow Control Methods Of Pumps
When in use, the pumps are always part of a pumping system. A pumping system is usually a network of pipes, tanks, valves and other system parts. The receiver is… Read more
Nov 27, 2015 | By Edvard
Electric Motor
Guidelines to electrical braking of asynchronous motors
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 machine the motor drives. However,… Read more
Nov 23, 2015 | By Edvard
Electric Motor
Troubleshooting An Open Circuit Faults in the Control Circuit
– The machine does not start when the start button is pressed. At this point the problem could be mechanical or electrical. We will focus on just the electrical circuit… Read more
Oct 26, 2015 | By Edvard
Electric Motor
19 Essential Information You Can Find On Motor Nameplate
Motor nameplate is normally located on all produced electric motors. Understanding nameplate information can be hard sometimes, but is essential. In most countries it is a requirement for manufacturers to… Read more
Aug 29, 2015 | By Edvard
Electric Motor
Comparison of Soft Starting and Frequency Converter Motor Starting
A 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… Read more
Aug 12, 2015 | By Edvard
Electric Motor
Comparision of Direct-on-line (DOL) and Star-delta Motor Starting
Direct-on-line (DOL) starting Advantages Drawbacks Star-delta starting Advantages Drawbacks Comparision of DOL and Star-delta starting As the name suggests, direct-on-line starting means that the motor is started by connecting it… Read more
Jul 17, 2015 | By Edvard
Electric Motor
Calculation of motor starting time as first approximation
The 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 modality and to the… Read more
Jun 22, 2015 | By Edvard
Electric Motor
Basics of DC Motors For Electrical Engineers – Beginners
Separate field excitation DC motors are still sometimes used for driving machines at variable speed. These motors are very easy to miniaturize, and essential for very low powers and low… Read more
Jun 15, 2015 | By Edvard
Electric Motor
5 most common motor load types
Certain load types are characteristic in the industrial world. Knowing the load profile (speed range, torque and power) is essential when selecting a suitable motor and frequency converter for the… Read more
May 20, 2015 | By Edvard
Electric Motor
The basics of built-in motor protection for engineers beginners
In order to avoid unexpected breakdowns, costly repairs and subsequent losses due to motor downtime, it is important that the motor is fitted with some sort of protective device. This… Read more
May 15, 2015 | By Edvard
