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Motors ch 13

Multispeed Motors

QuestionAnswer
1. One starter is required for each speed of a consequent-pole motor. True or False True
2. Typical synchronous speed for 60 Hx consequent-pole motors are ___ rpm with 4 poles and ___ rpm with 8 poles. 1800;900
3. Stator windings in a consequent-pole motor usually provide two speeds, one of which is ____ the speed of the other. half
4. A ___ is NOT a 3 phase AC motor with a rotor fed by a commutator and a set of brushes. auxiliary motor
5. A Schrage motor rotor has ___ windings 2
6. I an application of ___ circuit logic, a motor must be allowed to decelerate by coasting or braking before bieing changed to a low speed. decelerating
7. When a motor is installed and the starting circuit is connected, the motor should be tested at the highest speed. True or False False
8. In a Schrage motor, the brushes are place don different comutator segments in order to change the ___ across the primary stator windings. voltage
9. A circuit with ___ circuit logic allows the operator to select the desired speed by pressing either the low or high pushbutton accelerating
10. In a simple two-speed consequent-pole motor control circuit, the motor may be started from low speed or high speed. True or False True
11. ___ circuit logic is used in applications where a motor or load cannot withstand the stress of changiing quickly from high speed to low speed. Decelerating
12. A ___ circuit logic function requires an operator to start and operate a motor in a predetermined order. compelling
13. A conequent-pole motor only operates at one speed. True or False False
14. The relative position of the ___in Schrage AC motors is changed to change the speed of the motor. brushes
15.A consequent-pole motor with two poles when wired in series has ___ poles when wired in parallel 4
16. In some control circuits, a motor may be placed directly in low speed from high speed without stoppping the motor. True or False True
17. A ___ motor has stator windings that can be connected in two or more different ways so that the number of stator poles can be changed. consequent-pole
18. ___ circuit logic requires the operator to start the motor at low speed. Compelling
19. In a consequent-pole motor, the current can be made to travel through windings connected in series or parallel with each other. True or False True
20. In a Schrage motor the number of control coils is half the number of commutator segments because each end of the control coil is connected to adjacent commutator segments. True or False False
21 see the book pg 65
Created by: JoshHampton
 

 



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