synchronous machine with shorted rotor become induction machines (true or false)
Homework Answers
synchronous machine with shorted rotor become induction machines?
Answer :- True
Because if we short the rotor of synch. machine it will act as a wound rotor induction machine.
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synchronous machine with shorted rotor become induction machines
(true or false)
Q10. Based simply on the concept of rotor induction, explain what happens as the rotor approached...
Q10. Based simply on the concept of rotor induction, explain what happens as the rotor approached synchronous speed and why the rotor, practically, will always be slower than synchronous speed. What causes the rotor mmf? How must the rotor move with respect to the stator magnetic field in order to have a rotor mmf? What happens to torque as the rotor mmf (rotor flux density) decreases?
Q10. Based simply on the concept of rotor induction, explain what happens as the...
Consider the following electric machine types: direct current, induction, synchronous and reluctance. State which machine you...
Consider the following electric machine types: direct current, induction, synchronous and reluctance. State which machine you would propose to use in the following scenarios and motivate your answer. (a) In an explosive environment. (2) (b) The machine is connected to a load that needs to be maintained at a constant rotational speed. nothing there is nothing (2) (c) A machine whose speed can be controlled by controlling the applied voltage. (2) (d) The rotor of this machine is the simplest...
Problem 5: For the following two machines P 2 MW, line-3300V: Machine 1: A round-rotor synchronou...
Problem 5: For the following two machines P 2 MW, line-3300V: Machine 1: A round-rotor synchronous motor with a wound-rotor field has the following parameters: R is negligable.x,-457 Ω at a--2m50 rad/s Machine 2: A salient pole rotor is designed for the same stator yielding the following motor parameters. R is negligable .Х.: 1.3 ถ. X.. 457 at a-.. 2 50 rad /s Find a) Find the back-EMF voltage E, current I, and torque angle δ for both machines at...
1. Machine Overview. Please answer the following questions. Note: this is to test your comprehension of the basic concepts covered in class. For a DC Machine and Synchronous Machine: Name the...
1. Machine Overview. Please answer the following questions. Note: this is to test your comprehension of the basic concepts covered in class. For a DC Machine and Synchronous Machine: Name the two winding types for synchronous and de machines a. Identify which type of winding is used to control torque b. Of the winding types, which is wound on the stator? c. DC Machine: Synchronous Machine: nsidering the combined air gap MMF for the following machines, indicate which has rotating...
(ii) What are the two main rotor constructions of synchronous machines and how can you identify...
(ii) What are the two main rotor constructions of synchronous machines and how can you identify them? (iii) Identify the three slot construction of the stator, what are the advantages and disadvantages of each of them? (iv) What are the advantages of having the armature winding on the stator.
Both synchronous and asynchronous FSMs require a clock. a. True b. False. 2. In general, a...
Both synchronous and asynchronous FSMs require a clock. a. True b. False. 2. In general, a Mealy Machine will require more states than its equivalent Moore machine. a. True b. False. 3. An 8-state FSM will require more flip-flops to store its state vector than a 6-state FSM if they are implemented as one-hot machines. a. True b. False. 4. The excitation variables for a T-type FF are the easiest to work with because the T input is the same...
of each AC induction machine based on Figures 1 and 2 in terms of its rotor...
of each AC induction machine based on Figures 1 and 2 in terms of its rotor connection with external resistances. (10pts) Figure 1 (a) What is the type of rotor in Figure 1? Figure 2 (b) What is the type of rotor in Figure 2?
Q5(a) Differentiate between Induction and Synchronous motors. (5 marks) A generator shown in Figu...
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...
The swing equation of two finite interconnected synchronous machines are given by нао Р - Ра лf, dt? н, d'6, — Р, -...
The swing equation of two finite interconnected synchronous machines are given by нао Р - Ра лf, dt? н, d'6, — Р, -Р. пf, di? 2 angle between the two machines by 5= 5-6,. Obtain a swing Denote the relative rotor equation denoting the single machine infinite bus equivalent of the two machine system in terms of in the form Н а'8 Р. — Р. = пf, di? Determine the values of H , P, and P in terms of...
true or false 11. the speed of a synchronous motor does not decrease with an increase...
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....
Q10. Based simply on the concept of rotor induction, explain what happens as the rotor approached synchronous speed and why the rotor, practically, will always be slower than synchronous speed. What causes the rotor mmf? How must the rotor move with respect to the stator magnetic field in order to have a rotor mmf? What happens to torque as the rotor mmf (rotor flux density) decreases?
Q10. Based simply on the concept of rotor induction, explain what happens as the...
Problem 5: For the following two machines P 2 MW, line-3300V: Machine 1: A round-rotor synchronous motor with a wound-rotor field has the following parameters: R is negligable.x,-457 Ω at a--2m50 rad/s Machine 2: A salient pole rotor is designed for the same stator yielding the following motor parameters. R is negligable .Х.: 1.3 ถ. X.. 457 at a-.. 2 50 rad /s Find a) Find the back-EMF voltage E, current I, and torque angle δ for both machines at...
1. Machine Overview. Please answer the following questions. Note: this is to test your comprehension of the basic concepts covered in class. For a DC Machine and Synchronous Machine: Name the two winding types for synchronous and de machines a. Identify which type of winding is used to control torque b. Of the winding types, which is wound on the stator? c. DC Machine: Synchronous Machine: nsidering the combined air gap MMF for the following machines, indicate which has rotating...
of each AC induction machine based on Figures 1 and 2 in terms of its rotor connection with external resistances. (10pts) Figure 1 (a) What is the type of rotor in Figure 1? Figure 2 (b) What is the type of rotor in Figure 2?
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...
The swing equation of two finite interconnected synchronous machines are given by нао Р - Ра лf, dt? н, d'6, — Р, -Р. пf, di? 2 angle between the two machines by 5= 5-6,. Obtain a swing Denote the relative rotor equation denoting the single machine infinite bus equivalent of the two machine system in terms of in the form Н а'8 Р. — Р. = пf, di? Determine the values of H , P, and P in terms of...
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