Topic Summary (from www.electricmotors.machinedesign.com): Universal AC motors: Universal ac motors operate with nearly equivalent performance on direct current or alternating current up to 60 Hz. AC motors differ from a dc motors due to the winding ratios and thinner iron laminations. DC motors runs on ac, but with poor efficiency. Universal AC motors can operate on dc with essentially equivalent ac motor performance, but with poorer commutation and brush life than for an equivalent dc motor.

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• AC motors: Universal AC motors : Universal AC motors operate with nearly equivalent performance on direct current or alternating current up to 60 Hz (from www.electricmotors.machinedesign.com)
• DC motors: Midway between ordinary DC motors and stepper motors lies the realm of the brushless DC motor (from en.wikipedia.org)
• Electric motors: These motors are used extensively in Electric radio-controlled vehicles (from en.wikipedia.org)
• Brushless DC motors: Baldor is proud to announce a new family of Brushless DC motors , designed to provide customers the advantages and benefits of Brushless technology (from www.baldor.com)
• AC motor: AC motors differ from a dc motors due to the winding ratios and thinner iron laminations (from www.electricmotors.machinedesign.com)
• Duty motors: Performance Data is shown for the Vector Duty or constant torque microMAX and Black Max motors (from www.yaskawa.com)
• Induction motors: They may also be started as Induction motors using a squirrel-cage winding that shares the common rotor: once the motor reaches synchronous speed, no current is induced in the squirrel-cage winding so it has little effect on the synchronous operation of the motor, aside from stabilizing the motor speed on load changes. (from en.wikipedia.org)
• starting torque: General-purpose ac motors with normal starting torques and currents, and low slip (from www.electricmotors.machinedesign.com)
• Torque motors: Constant Torque or variable Torque motors having one winding or two winding are stocked in NEMA frames 56 through 284T (from www.baldor.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)
• 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)
• brushless DC motor: The new motors are the BSM25 and BSM33 brushless DC motors; they are available with NEMA mounting.. (from www.baldor.com)
• torque motor: These types of motors include: electromagnetic brake motors to hold loads in a power-off situation; clutch and brake motors for quick starts and stops; synchronous motors for a fixed speed in synchronization with the power frequency; and torque motors for tension control and winding applications. (from www.orientalmotor.com)
• Totally Enclosed: Two Speed Motors are available in both Totally Enclosed fan cooled and open drip proof designs (from www.baldor.com)
• machine tools: Applications for these motors include fans, blowers, pumps, machine tools , hoists and conveyors. (from www.baldor.com)
• synchronous motor: In effect, they act as three-phase synchronous motors containing their own variable-frequency drive electronics (from en.wikipedia.org)
• induction motor: There are two basic types of AC motors; standard induction motors that run continuously and reversible motors that allow for bi-directional operation (from www.orientalmotor.com)
• synchronous motors: Nowadays, synchronous motors are frequently driven by transistorized variable-frequency drives (from en.wikipedia.org)
• single-phase AC motors: Fractional-horsepower polyphase AC motors are generally design B. Because of the drooping characteristics of design B, a polyphase AC motor that produces the same breakdown (maximum) torque as a single-phase AC motor cannot attain the same speed-torque point for full-load speed as single-phase AC motors (from www.electricmotors.machinedesign.com)
• Universal AC Motors: Universal AC Motors can operate on dc with essentially equivalent AC motor performance, but with poorer commutation and brush life than for an equivalent dc motor. (from www.electricmotors.machinedesign.com)

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