Induction motor Is the most common type of AC motor which is widely used in industrial and commercial applications.
Hence option D is correct.
The most common type of AC motor is the a. Series Motor O b. Synchronous Motor...
Question 16 A type of AC motor which maintains a very consistent speed O a. Compound Motor b. Shunt Motor C. Induction Motor d. Synchronous Motor
The starting torque of a three-phase synchronous motor is increased when SE O ou h atic tio co e rotor electromagnet is turned on. a. b. the rotor electromagnet is turned off. c, the power factor of the ac power network is unity. d. dc power is applied to one of the stator windings. 2. When a synchronous motor without load is connected to a three-phase ac power network, the resulting power factor depends on a. the speed of the...
20) This type of motor may used for power factor correction: A) wound-rotor induction B) brushless dc C) squirrel-cage induction D) synchronous
true or false 11. the speed of a synchronous motor does not decrease with an increase in mechanical output. 12. selsyn motors are selective synchronous motors. the capacitor-start, induction-run motor interchange the connections of the leads to the polarized starting capacitor. 14. to reverse direction of rotation of a capacitor-start induction-run motor interchange the connections of the leads to the polarized starting capacitor. 15. the centrifugal switch contacts will close when a motor gets close to it's normal operating speed....
A type of DC motor which has wide variance in speed based on the mechanical load. a. Series Motor. b. Parallel Motor c. Shunt Motor d. Compound Motor.
Q5(a) Differentiate between Induction and Synchronous motors. (5 marks) A generator shown in Figure 05(b) with no-load frequency of 61 Hz and a slope Sp of I MW/Hz is connected to Load 1 consuming 1 MW of real power at 0.8 PF lagging. Load 2 (that is to be connected to the generator) consumes a real power of 0.8 MW at 0.707 PF lagging (b) Load 1 Turbine generator Load 2 Figure Q5(b) i) Find the operating frequency of the...
24. Synchronous motor delivers reactive power when: a. The terminal voltage leads the induced voltage in armature windings b. The terminal voltage lags the induced voltage in armature windings c. Synchronous motor is an inductive load; it absorbs reactive power. Capacitors deliver reactive power d. The terminal voltage is less than the induced voltage in armature windings e. None of the above. 25. In a synchronous machine, if magnetic field of the rotor lags the stator field by a mechanical...
7. Compare the shunt wound de motor and, the series wound dc motor on the basis of a) starting torque b) starting urrent c) efficiency d) speed regulation
(b) (i) Explain briefly why an induction motor can never run at synchronous speed? (2 Marks) (ii) If a six-pole induction motor supplied by a three-phase 50 Hz supply has a rotor frequency of 2.3 Hz, Calculate: (a)The percentage slip (b)The speed of the rotor in rpm (4 Marks) (iii)Draw a typical torque versus slip characteristic curve of an induction motor. If rotor resistance is increased show how the new torque versus slip curve deviates from the original one. (4...
Which synchronous motor below is least likely to use salient poles? A. 2 pole motor B. 4 pole motor C. 6 pole motor D. 8 pole motor