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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
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#2840659
BALDOR MVM09222D-APN M3AA 90 LB 2P B5 2.2KW :
Brand Baldor
Model MVM09222D-APN
$376.57 Each
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#2549078
Baldor MVM10224D-AP M3AA 100 LC 4P B5 2.2265W
Brand Baldor
Model MVM10224D-AP
Obsolete
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$7,013.65 Each
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$5,378.96 Each
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$12,045.04 Each
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Obsolete
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$1,340.17 Each
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$3,119.16 Each
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#2275895
Browning CTFB 2.0 2/4V 145TC 100 C-FACE ATO BRAKEMOTORS-900
Brand Browning
Model CTFB 2.0 2/4V 145TC 10
$1,135.75 Each
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$6,617.20 Each
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$8,844.46 Each
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$2,760.69 Each
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