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Description: Most industrial motors require AC (alternating current) voltage whose polarity oscillates 60 times a second (for a frequency of 60 Hertz) between positive and negative. Single phase AC motors have brushes just like DC motors. Most of them have capacitors to assist starting and to establish the direction of rotation. Changing direction implies changes in the capacitors’ connection. Speed is directly proportional to the applied voltage (just like DC motors). Usage is restricted to low-power uses (home appliances like vacuum cleaners, washing machines, coffee grinders, or power tools like rotary hammers etc.). For higher power requirements, three-phase AC motors are used. These do not have carbon brushes to wear out, their rotors (called squirrel cages) have no electrical connections, thus making them extremely robust and long-lived. Only the stator windings are connected to the power line. They just keep turning as long as their ball bearings are OK. Changing direction requires swapping any two of the three phase lines. Speed control is done by modifying the frequency of the AC delivered to the motor; this can be done using complex devices called AC drives.
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Item
Price
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#726532
$80.66 Each
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#726546
5KCP39HGAA06AS .33HP 1PH 115V 1075RPM AC MOTOR
Brand Leeson
Model 5KCP39HGAA06AS
$94.89 Each
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$862.63 Each
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$11,330.45 Each
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$1,465.73 Each
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$686.10 Each
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$480.33 Each
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#2840482
BALDOR EMVM13754D-AP-50 M3AA 132MA 4P B5 7.5KW :
Brand Baldor
Model EMVM13754D-AP-50
$954.29 Each
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#2549063
Baldor MM25554-AP M3AA 250 SMA 4P B3 55265W
Brand Baldor
Model MM25554-AP
$4,287.43 Each
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$5,450.17 Each
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$2,803.30 Each
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