Answer True or False 18. A three-phase variable reluctance stepper motor with 12 stator windings has the windings set 30

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Answer True or False
18. A three-phase variable reluctance stepper motor with 12 stator windings has the windings set 30 degrees apart 19. The two-phase operation of a resolver uses the variation in voltage amplitude to determine shaft position
20. The micro-stepping mode generates small stepping angles through motor current control via PWM of the excitation voltage of the rotor windings
21. A resistance-start motor has a start winding, which is a coil made of many turns of heavy-gauge wire
22. In the capacitor-start induction-run motor, the capacitor generates a current in the start-winding that lags the phase of the voltage input.
23. The centrifugal start switch is usually mounted on the shaft of the AC motor.
24. The performance of the resistance-start induction-run motor and the capacitor-start induction-run motor is basically identical
25. The shaded-pole induction motor is a single-phase motor that has no start and run windings
26. In a three-phase motor, the voltages are 180 degrees out of phase with each other
27. The current required to run the AC motor flows through the thermal overload heater and bimetallic switch contacts
28. In a synchronous motor. The salient poles project outward from the shaft of the motor
29. Detent torque is the maximum load-originating torque that the motor can stand without moving from its position with the stator energized
30. The speed torque and the current-torque curves are linear for the permanent magnetic motor
31. The total encoder error is the sum of the instrument error, quadrature error, interpolation error, and quantization error
32. The coreless motor is chosen over the wound-rotor motor in high torque application
33. The figure of merit is a number that provides and objective method of determining the relative ability of a permanent magnetic motor
34. An optical encoder is a sensor
35. The AC motor is better suited than the DC motor for those applications that require variable speeds
36. On a AC motor plate, the type specifies the motor’s enclosure.
37. Slip is the difference between the speed of the rotating field and the speed of the rotor
38. When selecting a motor, the current rating of the starter must be less than the actual current that the starter will switch
39. In an AC servomotor, the voltage applied to the winding and the voltage applied to the control winding are either in phase or ninety degrees out of phase.