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Question

The ? is the stationary part of an AC motor; it consists of a laminated iron core and windings (or coils) that convert electrical energy to the energy of a magnetic field.
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The rotor is mounted on a ? that is used to transfer power to the load.
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motors

lesson 5 Squirrel- Cage motors

QuestionAnswer
The ? is the stationary part of an AC motor; it consists of a laminated iron core and windings (or coils) that convert electrical energy to the energy of a magnetic field. stator
The rotor is mounted on a ? that is used to transfer power to the load. shaft
true/false The main difference between different types of 3-phase motors is the design of the rotors and windings. true
? has a high starting torque, low starting current, and low slip. Motor Design C
The ? provides a short-circuit path for induced current to circulate within a rotor. shorting ring
? motors are suitable for equipment with very high-inertia starts, such as cranes and hoists. Design D
A squirrel-cage motor is very similar to a ? , but with a rotating secondary. transformer
? motors are designed for a broad variety of applications, such as in HVAC applications providing power for fans and blowers and in industrial applications providing power for pumps. Design B
true/false Mutual induction typically requires the presence of a magnetic field without the movement of a conductor within that field. false
The left-hand coil rule describes the ? of the magnetic poles created by the current flow. polarity
The direction of torque in a motor can be determined with the ? rule. right-hand motor
true/false When troubleshooting a motor control circuit, the voltage at the transformer secondary side should be checked if the voltage reading at the control transformer primary is correct. true
true/false When measuring the resistance of two equal coils connected in parallel, the total resistance is one half the resistance of one coil. true
When troubleshooting a 3-phase motor, the motor windings should be checked for any opens or shorts by using a DMM set to measure ? . resistance
When troubleshooting a motor control circuit, if the fuses or circuit breaker on the control transformer are blown or tripped, it is possible the ? needs to be replaced. transformer
true/false The bars of Design B motors are narrow and are placed deep in the iron, which increases the reactance and raises the current, while maintaining normal starting torque. false increases the reactance and lowers the current while maintaining normal starting torque
The rotor's magnetic field and the stator's magnetic field interact to create ? . torque
Created by: Athomp705
 

 



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