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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.
Item ID
Item
Price
Quantity
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#726905
Leeson LM14549
Brand Leeson
Model LM14549
Obsolete
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#726937
Leeson LM16404
Brand Leeson
Model LM16404
Obsolete
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#727036
Leeson LM19625
Brand Leeson
Model LM19625
Obsolete
Big_card_vertical
#727046
Leeson LM19754
Brand Leeson
Model LM19754
Obsolete
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#727060
Leeson LM20049
Brand Leeson
Model LM20049
Obsolete
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#727095
Leeson LM21240
Brand Leeson
Model LM21240
Obsolete
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#727280
Leeson LM28166
Brand Leeson
Model LM28166
Obsolete
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#727311
Leeson LM28226
Brand Leeson
Model LM28226
Obsolete
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#727367
Leeson LM30678
Brand Leeson
Model LM30678
Obsolete
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#727413
Leeson LM31246
Brand Leeson
Model LM31246
Obsolete
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