Induction machine working principle is closest to the transformer at slip = _
Induction machine working principle is closest to the transformer at slip = _
Assuming that the nominal slip for the tested machine (three-phase squirrel-cage induction motor) is around 5%, from the graphs estimate how much is the rated current. Explain your thinking. Any answer with the example graph will do.
A 2-pole, 20MW single phase induction machine used for driving a train has a slip of 4.12%, when it is delivering 80% of its rated torque and 15.6MW. The rotor speed at the rated torque/power is 3415 rpm. (i) Determine the synchronous speed of the motor, under the above conditions, as well as the frequency required by the power electronics in the drive (ii) If the torque and synchronous speed were kept constant under the above conditions, calculate the load...
(6') A 100-hp, 60-Hz, three-phase induction machine has a slip of 0.03 at full load. Compute the efficiency of the machine at full load when the friction and windage losses are 900 W, the stator core loss is 4200 W, and the stator copper loss is 2700 W
I. *Research and report on the origins of the Principle of Mathematical Induction.
I. *Research and report on the origins of the Principle of Mathematical Induction.
Use the Principle of mathematical induction to prove
2. Use the Principle of Mathematical Induction to prove: Lemma. Let n E N with n > 2, and let al, aa-.., an E Z all be nonzero. If gcd(ai ,aj) = 1 for all i fj, then gcd(aia2an-1,an)1. 1, a2,, an
Proofs using induction:
In
3for all n 2 0. n+11 Use the Principle of Mathematical Induction to prove that 1+3+9+27+3 Use the Principle of Mathematical Induction to prove that n3> n'+ 3 for all n 22
a) Transformers work by the Principle of Electromagnetic Induction. Briefly explain this to a layman. b) i. [2 marks] [1 mark] State the two (2) types of losses in a transformer and also state where in the [2 marks] State two (2) advantages of an auto-transformer over an ordinary [2 marks] State why DC voltages do not work in transformers. 11. transformer these losses can be found. 111. transformer. c) Explain briefly why electric power is transmitted at very high...
Consider a 2-pole, 3-phase induction machine, with a rated frequency of 60Hz, producing the rated torque at slip s= 3.0percent, when supplied with rated voltages. Under the rated torque condition, calculate the rotor speed wm in rad/s.
19. When the maximum torque of three phase induction motor is obtained at high slip: (3 Points) The efficiency of the motor will be minimum The efficiency of the motor will decrease The efficiency of the motor does not change The efficiency of the motor will increase
2.d. Explain the principle of electromagnetic induction in the motor's application.