14177A NEETS 5 GENERATORS AND MOTORS Flashcards
The majority of the motors used throughout the Navy are designed to operate on what?
AC
For motors that require variable speeds what is the best type of motor?
DC
What type of motors may be considered as polyphase motoros, of constant speed, whose rotors are energized with dc voltage?
Synchronous
Induction motors, single-phase or polyphase, whose rotors are energized by what, are the most commonly used AC motor?
Induction
What are the three basic types of AC motors?
Series, Synchronous, and Induction
What can be used to drive an AC series motor efficiently?
DC power
What type of motors are used for driving fans, electric drills, and other small appliances?
Series
What principle is the key to the operation of most AC motors?
Rotating magnetic fields
What type of motors are rarely used except in special-purpose equipment?
Two-phase
What type of motor cannot be started from a standstill by applying three-phase ac power to the stator?
Synchronous
What type of winding is added to the rotor of a synchronous motor to cause it to start?
Squirrel-cage
What is the most commonly used type of AC motor?
Induction
What type of motors are induction motors called?
Constant-speed
What is the least expensive, lowest maintenance type of of AC motor?
Single-phase AC induction
What type of motors are designed to use inductance, capacitance, or resistance to develop a starting torque?
Split-phase