UA Electricity 2 Mid Term Review
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Motor | A device which converts electrical energy into mechanical energy.
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| Generator | A device which converts mechanical energy into electrical energy.
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| Principle of Operation | Operation is based upon magnetism. The motor revolves because of rotating magnetic fields.
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| Basic Parts of a Motor | Stator – Solid electrical housing protecting the windings (in the inner circumference) used to create a rotating magnetic field. Rotor - The part that rotates Shaft and bearings - Supports the system.
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| Split Phase motor has two (2) electrical windings | Start winding: Wound with a fine wire size and has a higher resistance as compared to the Run winding Run winding Wound with larger wire and has less resistance than the Start winding.
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| Basic Types of Motors | Simple split phase motor (No capacitors used) Permanent split phase motor- PSC (Run Capacitor Constantly in circuit) ) Capacitor start - capacitor run (Start cap only used at start, Run cap is continuous during operation
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| Basic Types of Motors | Shaded pole motor (Only one winding, No capacitor) ) Three (3) phase motor (No Capacitors used what-so-ever)
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| Definition of Torque | It is the ability or force applied which is needed to get the motor shaft to rotating. Better Known as: “Rotational Energy”
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| Characteristics of a Split Phase Motor | Low torque starting ability Motor has two windings - Start & Run Application is fractional hp up to 5hp.
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| Permanent Split Capacitor Motor | It has a hp rating of fractional up to 5hp.
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| Capacitor Start-Capacitor Run Motor | *Motor uses a start capacitor to improve starting ability ( increase torque) *and a run capacitor to improve running ability(decrease drag).
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| Three Phase Motor | Motor has very high starting torque. Motor does not require starting relays or capacitors. Hp. rating is from fractional up to 1000’s of hp.
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