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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
Quantity
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$2,232.05 Each
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$5,572.36 Each
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#726557
5KCP39MGAA08BS .5HP 1PH 208-230V 1075RPM AC MOTOR
Brand Leeson
Model 5KCP39MGAA08BS
$113.17 Each
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$1,649.77 Each
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$160.75 Each
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#5058466
AURORA 46WP1HS700HE 700HP 1800RPM 460 5809L
Brand Aurora Motors
Model 46WP1HS700HE
$28,357.63 Each
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Obsolete
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#2548520
Obsolete
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Obsolete
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#2840651
BALDOR MM25552-PPN M3BP 250 SMA 2P B3 55KW :
Brand Baldor
Model MM25552-PPN
$5,015.43 Each
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$1,668.90 Each
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