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Synchronous motor
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A synchronous electric motor is an AC electric motor in which, at steady state, the rotation of the shaft is synchronized with the frequency of the supply current. Synchronous motors use permanent mag
Miniature synchronous motor used in analog clocks. The rotor is made of a permanent magnet.
Miniature synchronous motor used in analog clocks. The rotor is made of a permanent magnet.
Small synchronous motor with integral stepdown gear from a microwave oven
Small synchronous motor with integral stepdown gear from a microwave oven
Single-phase 60 Hz 1800 RPM synchronous motor for a Teletype machine, non-excited rotor type, manufactured from 1930 to 1955
Single-phase 60 Hz 1800 RPM synchronous motor for a Teletype machine, non-excited rotor type, manufactured from 1930 to 1955
Externally excited motor, 1917. The exciter is on the left.
Externally excited motor, 1917. The exciter is on the left.
Induction motor
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An induction motor or asynchronous motor is an AC electric motor in which the electric current in the rotor that produces torque is obtained by electromagnetic induction from the magnetic field of the
Synchronous motor
…The rotor turns in step with the stator field at the same rate and as a result, provides a second synchronized rotating magnet field. Synchronous and induction motors are the most widely used AC motors. Synchronous motors rotate at a rate locked to the line frequency since they do not rely on induction to produce the…
Three-phase totally-enclosed fan-cooled (TEFC) induction motor with end cover on the left, and without end cover to show cooling fan on the right. In
Three-phase totally-enclosed fan-cooled (TEFC) induction motor with end cover on the left, and without end cover to show cooling fan on the right. In TEFC motors, interior heat losses are dissipated indirectly through enclosure fins, mostly by forced air convection.
Cutaway view through stator of TEFC induction motor, showing rotor with internal air circulation vanes. Many such motors have a symmetric armature, an
Cutaway view through stator of TEFC induction motor, showing rotor with internal air circulation vanes. Many such motors have a symmetric armature, and the frame may be reversed to place the electrical connection box (not shown) on the opposite side.
A model of Nikola Tesla's first induction motor at the Tesla Museum in Belgrade, Serbia
A model of Nikola Tesla's first induction motor at the Tesla Museum in Belgrade, Serbia
Squirrel-cage rotor construction, showing only the center three laminations
Squirrel-cage rotor construction, showing only the center three laminations