About Electric Drives
Electric Drives : An electric drive is an electromechanical system that employs an electric motor as the prime mover instead of a diesel engine, steam or gas turbines, hydraulics, etc. to control the motion and processes of different machines and mechanisms. 1 Typical applications of electric drives include fans, ventilators, compressor pumps, hoists, cranes, conveyors, excavators, escalators, electric locomotives and cars. 2
An electric drive has several advantages 3 over other types of drives systems, such as:
Control characteristics can be adapted to application requirements.
Simple and easy speed control methods.
Electric braking can be applied easily.
Wide range of speed, power, torque ratings.
Efficiency is higher.
Short time overload capacity.
Function a variety of work environments, such as explosive, radioactive and submerged.
Self-starting–no need of external starting equipment.
Compared to hydraulic and diesel prime movers, its operation is cleaner, less noisy and less maintenance.
A typical electric drive system includes a controller, a transmission, an electric motor and a driven load A key difference in different types of electric drive systems is the type of controller: (A) distinct D.C. motor control 4 components, such as motor starters, switches and operator controls, or (B) electronic motor controllers, called drive controls, that use semiconductors with electronic circuitry and software to perform the same functions of distinct D.C. motor control components.
Applications: Oil & Gas, Pulp & Paper, Chemical, Petrochemical, Water treatment, Fume treatment, Mining, Shipbuilding, Power generation.
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