Topic Summary (from en.wikipedia.org): An Induction motor (IM) is a type of AC motor where power is supplied to the rotating device by means of electromagnetic induction . An electric motor converts electrical power to mechanical power in its rotor (rotating part). There are several ways to supply power to the rotor. In a DC motor this power is supplied to the armature directly from a DC source. But in an AC motor this power is induced in the rotating device. An Induction motor can be called a rotating transformer because the stator (stationary part) is essentially the primary side of the transformer and the rotor (rotating part) is the secondary side. Induction motors are widely used, especially polyphase Induction motors, which are frequently used in industrial drives.

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• Induction motor: An Induction motor (IM) is a type of AC motor where power is supplied to the rotating device by means of electromagnetic Induction (from en.wikipedia.org)
• induction motors: induction motors are widely used, especially polyphase induction motors , which are frequently used in industrial drives. (from en.wikipedia.org)
• AC motor: But in an AC motor this power is induced in the rotating device (from en.wikipedia.org)
• DC motor: In a DC motor this power is supplied to the armature directly from a DC source (from en.wikipedia.org)
• DC Motors: Midway between ordinary DC Motors and stepper Motors lies the realm of the brushless DC motor (from en.wikipedia.org)
• magnetic field: Induction motors use shorted wire loops on a rotating armature and obtain their torque from currents induced in these loops by the changing magnetic field produced in the stator (stationary) coils. (from hyperphysics.phy-astr.gsu.edu)
• rotor speed: Determine (a) the rotor frequency (b) the slip at which maximum torque occurs (c) rotor speed at one half of the rated torque (d) the external resistance per phase required to operate the machine at 1000 rpm and at one half of the rated torque load(assume the motor is operating on the linear section of the torque curve) (from www.ele.auckland.ac.nz)
• synchronous motor: In effect, they act as three-phase synchronous motors containing their own variable-frequency drive electronics (from en.wikipedia.org)
• Electric motors: These motors are used extensively in Electric radio-controlled vehicles (from en.wikipedia.org)
• AC motors: There are two principal types of polyphase induction motors : squirrel-cage and wound-rotor machines (from answers.yahoo.com)
• synchronous motors: In effect, they act as three-phase synchronous motors containing their own variable-frequency drive electronics (from en.wikipedia.org)
• rotating field: Therefore, the current in the starting winding leads the current in the running winding, causing a rotating field (from www.electricmotors.machinedesign.com)
• Electric motor: An Electric motor converts electrical power to mechanical power in its rotor (rotating part) (from en.wikipedia.org)
• Brushless DC motors: Midway between ordinary DC motors and stepper motors lies the realm of the Brushless DC motor (from en.wikipedia.org)
• Torque motors: Split phase motors are considered low or moderate starting Torque motors and are limited to about 1/3 hp. (from www.electricmotors.machinedesign.com)
• Stepper motors: Built in a fashion very similar to Stepper motors , these often use a permanent magnet external rotor, three phases of driving coils, one or more Hall effect sensors to sense the position of the rotor, and the associated drive electronics (from en.wikipedia.org)
• brushless DC motor: A specialized class of brushless DC motor controllers utilize EMF feedback through the main phase connections instead of Hall effect sensors to determine position and velocity (from en.wikipedia.org)
• AC current: Both squirrel-cage and wound-rotor machines can be designed for two- or three-phase current . (from answers.yahoo.com)
• torque motor: BH series motors provide 1/4 HP (200 W) output power and up to 530 lb-in of torque in a compact 4.09 in frame size. (from catalog.orientalmotor.com)
• Stepper motor: Built in a fashion very similar to Stepper motors, these often use a permanent magnet external rotor, three phases of driving coils, one or more Hall effect sensors to sense the position of the rotor, and the associated drive electronics (from en.wikipedia.org)

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