Every car has it – The Lundell generator with claw-pole rotor

Increasing comfort and safety in cars, trucks, and buses driven by combustion engines require more installed electric power on board. As of now, the Lundell generator (claw-pole rotor generator) is the… Read more

May 06, 2016 | Edvard

Two Basic Methods Used For Braking a Motor (DC Injection and Dynamic)

Two common basic methods used for braking a motor are DC injection braking and dynamic braking. We will look at both in detail, starting with electric braking. DC Injection Braking… Read more

Apr 18, 2016 | Edvard

3 reasons for increased efficiency loss in rewound motors

Approximately 300,000 motors are rewound in the UK every year, with an average rating of about 12 kW, so the efficiency of rewound motors is extremely important. The loss in… Read more

Mar 07, 2016 | Edvard

Regular Motor Maintenance To Avoid Failure (and Prolong Its Lifespan)

A well and carefully designed motor maintenance program, when correctly used, can be summed up as preventive maintenance, predictive maintenance and reactive maintenance. Inspection cycles depend upon the type of… Read more

Feb 29, 2016 | Edvard

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 | Edvard

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 | Edvard

5 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 | Edvard

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 | Edvard

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 | Edvard

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 | Edvard