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A fractional-horsepower motor ( FHP) is an electric motor with a rated output power of less than one horsepower (745.7 W) (the term 'fractional' indicates less than one unit). There is no defined minimum output, however, it is generally accepted that a motor with a frame size of less than 35mm square can be referred to as a 'micro-motor'.
1828, Ányos Jedlik. Hungarian, physicist and unsung father of the dynamo and electric motor; invented the first commutated rotary electromechanical machine with electromagnets. [3][5] He invented the commutator. In 1828 Jedlik demonstrated the first device to contain the three main components of practical DC motors: the stator, rotor and ...
An electric motor is a machine that converts electrical energy into mechanical energy. Most electric motors operate through the interaction between the motor's magnetic field and electric current in a wire winding to generate force in the form of torque applied on the motor's shaft. An electric generator is mechanically identical to an electric ...
Reciprocating electric motor. A reciprocating electric motor is a motor in which the armature moves back and forth rather than circularly. Early electric motors were sometimes of the reciprocating type, such as those made by Daniel Davis in the 1840s. [1] Today, reciprocating electric motors are rare but they do have some niche applications, e ...
The Little Joe is a type of railroad electric locomotive built by General Electric. [1] The locomotives had twelve axles, eight of them powered, in a 2-D+D-2 arrangement. They were originally intended to be exported to the Soviet Union and designed to operate on Soviet Railways (SZhD) 3,300-volt DC overhead line system.
The single-molecule electric motor is an electrically operated synthetic molecular motor made from a single butyl methyl sulphide molecule. [ 1] The molecule is adsorbed onto a copper (111) single-crystal piece by chemisorption. [ 1] The motor, the world's smallest electric motor, [ 2] is just a nanometer (billionth of a meter) across [ 3] (60 ...
Motor-CAD is an Electromagnetic and Thermal analysis package for electric motors and generators, developed and sold by Motor Design Ltd. It was initially released in 1999. Modules are available for brushless permanent magnet motors (BPM), outer rotor BPM motors, induction motors, permanent magnet dc machines, switched reluctance motors ...
The poles can be varied at a ratio of 1:2 and thus the speed can be varied at 2:1. [ 7 ] [ 8 ] [ 9 ] Normally, the electrical configuration of windings is varied from a delta connection (Δ) to a double star connection (YY) configuration in order to change the speed of the motor for constant torque applications, such as the hoists in cranes .
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