Question 4 Three phase, Write answer
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Induction motor
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- why the slip of induction motor is never zero.c) What is the physical meaning for each of the following induction motor parameters: R1 „R2 ,Rc ,X1 ,X2 ,Xm ? What is synchronous watt?xplain any one method of speed control of Induction motor with respect to rotor side with diagram. please i need with clear handwriting
- 14/ What are the following statements are true for a three-phase induction motor? I. Three-phase induction motor stator winding is fed from a three-phase supply II. Stator carries a three-phase winding III. Rotor carries a short circuited winding a. I and II only b. I,II and III c. II and III d. I onlyWhat are the following statements are true for a three-phase induction motor? I. Three-phase induction motor stator winding is fed from a single-phase supply II. Stator carries a three-phase winding III. Rotor carries a short circuited winding a. I,II and III b. I only c. I and II only d. II and IIIState the types of induction motor
- e) How is the direction of the rotating field changed in the three-phase induction motor? f) Write down the operating modes of induction motors depending on the slip values. g) When the speed of the induction motor is zero (or not rotating), in which electrical machine does it match? h) Why are the steel thin layers used in the core of the induction motor? Please answer all. Just two to three lines of answer for each question is enoughA four-pole induction motor drives a load at 2478 rpm. This is to be accomplished by using an electronic converter to convert a 400-V dc source into a set of three-phase ac voltages. Part A Find the frequency required for the ac voltages assuming that the slip is 4 percent. The load requires 2 hp. Express your answer to three significant figures and include the appropriate units. f= Submit Part B Value I = HA Request Answer Submit If the dc-to-ac converter has a power efficiency of 90 percent and the motor has a power efficiency of 80 percent, estimate the current taken from the dc source. Express your answer to three significant figures and include the appropriate units. HÅ Value Units Request Answer ? Units ?Question 4: Induction Motors a) Name the principal components of an induction motor. b) Explain how a revolving field is set up in a 3-phase inducion motor
- If the power measured per phase is increasing, what will happen to the speed of the three phase induction motor? a. Decrease b. Equal c. Increase d. Zero(Question 1): Discuss the following statements briefly 1. Slip ring induction motors need maintenance. 2. When the load torque on the induction motor increases, we will notice an increase in the current drawn. 3. The starting capacitor of a capacitor start capacitor run induction motor is 100 µF while the running capacitor is 14 µF. 4. VFD is the best way to control the speed of three-phase induction motors. 5. Adding auxiliary winding in single phase induction motors. 6. A 220-V three-phase six-pole 50-Hz induction motor is running at a slip of 3.5 percent, determine the slip speed of the rotor4. A three phase, 50 Hz induction motor has a full load speed of 1440 rpm. The full load slip will be? a) 4% b) 5% c) 2.4% d) 3%
