9. motors subject to sudden heavy loads are usually equipped with an overload release clutch, also called a…

9. motors subject to sudden heavy loads are usually equipped with an overload release clutch, also called a ____________; its function is to disconnect the motor from the driven mechanism when the load is great enough to cause damage.\n10. because of the limited distance of travel permitted in the driven mechanism, reversible actuating motors are usually limited in their amount of rotation in each direction by ____________ switches.\n11. some modern dc motors are designed without brushes; these are called ____________ dc motors.\n12. some actuating motors are provided with a thermal circuit breaker, or thermal protector, to protect the motor from ____________ and excessive ____________.\n13. there are three principal types of ac motors: the universal motor, the induction motor, and the ____________ motor.\n14. a ____________ motor is identical with a dc motor and can be operated on either alternating or direct current.\n15. a ____________ sensor is a solid - state component that is able to detect the presence of nearby objects without any physical contact.\n16. two common differential transducers used to determine the position of a moving component are the ____________ and the ____________.\n17. the percentage of difference in the speeds of the stator and rotor fields is called the ____________.\n18. the ____________ point is when the load on an induction motor becomes so great that the torque of the rotor cannot carry it and so the motor will stop.\n19. motors that employ capacitors for starting or for continuous operation are often called ____________ motors.

9. motors subject to sudden heavy loads are usually equipped with an overload release clutch, also called a ____________; its function is to disconnect the motor from the driven mechanism when the load is great enough to cause damage.\n10. because of the limited distance of travel permitted in the driven mechanism, reversible actuating motors are usually limited in their amount of rotation in each direction by ____________ switches.\n11. some modern dc motors are designed without brushes; these are called ____________ dc motors.\n12. some actuating motors are provided with a thermal circuit breaker, or thermal protector, to protect the motor from ____________ and excessive ____________.\n13. there are three principal types of ac motors: the universal motor, the induction motor, and the ____________ motor.\n14. a ____________ motor is identical with a dc motor and can be operated on either alternating or direct current.\n15. a ____________ sensor is a solid - state component that is able to detect the presence of nearby objects without any physical contact.\n16. two common differential transducers used to determine the position of a moving component are the ____________ and the ____________.\n17. the percentage of difference in the speeds of the stator and rotor fields is called the ____________.\n18. the ____________ point is when the load on an induction motor becomes so great that the torque of the rotor cannot carry it and so the motor will stop.\n19. motors that employ capacitors for starting or for continuous operation are often called ____________ motors.

Answer

Brief Explanations:

  1. An overload - release clutch is also called a shear - pin clutch which disconnects motor under heavy load.
  2. Reversible actuating motors are limited by limit switches due to limited travel in driven mechanism.
  3. DC motors without brushes are called brushless DC motors.
  4. Thermal circuit breakers protect motors from overheating and excessive current.
  5. Three principal AC motors are universal, induction and synchronous.
  6. A universal motor can operate on AC or DC like a DC motor.
  7. A proximity sensor detects nearby objects without contact.
  8. Commonly used differential transducers for position are linear variable differential transformer (LVDT) and rotary variable differential transformer (RVDT).
  9. The percentage difference in stator and rotor speeds is called slip.
  10. The pull - out point is when an induction motor stops due to excessive load.
  11. Motors using capacitors for starting or operation are called capacitor motors.

Answer:

  1. Shear - pin clutch
  2. Limit
  3. Brushless
  4. Overheating; current
  5. Synchronous
  6. Universal
  7. Proximity
  8. Linear variable differential transformer (LVDT); Rotary variable differential transformer (RVDT)
  9. Slip
  10. Pull - out
  11. Capacitor