divided by rpm. Torque equals horsepower 5252 a. b. horsepower x 5252 voltage x horsepower C. d.
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Q: A
A: The generated emf is given by Eg=Vs + IaRa where Ia is armature current and Vs is terminal voltage
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- A d.c. shunt machine has armature and field resistances of 0.025 Ω and 80 Ω respectively. When connected to constant 400-V bus-bars and driven as a generator at 450 r.p.m., it delivers 120 kW. Calculate its speed when running as a motor and absorbing 120 kW from the same bus-barsDuring stator voltage control of Induction motor drives, Relationship of Torque (T) with Vrms is given by a. T∝1/Vrms2 b. T∝1/Vrms c. T∝Vrms d. T∝Vrms2Q15 Choose correct answer The bearings and commutator rotation of the DC machines which causes the A) Ohmic loss B) Friction loss C) Eddy current loss D) Hysteresis loss
- A dc generator has a prime mover that provides a speed of 1772 rpm at a torque of 24.4 N-m. With this prime mover, the generator can generate voltage of 119.8 volts with an armature current of 17.5 amperes. If the terminal voltage is 103.0 volts and its load current is 10.8 amperes, determine copper losses in kW.38. Calculate the voltage induced in the armature winding of a 4-pole, wave wound, dc machine having 728 active conductors and running at 1800 rpm. The flux per pole is 30 mWb.a. 1310 Vb. 1512 Vc. 1210 Vd. 1620 VDescribe the similarities in the construction of a DC motor and a DC generator. Please answer in short point wise and dont copy from other sources i will like lt
- 55. Calculate the voltage induced in the armature winding of a 4-pole, lap wound, dc machine having 728 active conductors and running at 1800 rpm. The flux per pole is 30 mWb.a. 655.2 Vb. 493.6 Vc. 545.4 Vd. 385.2 VQ#3(a): Discuss the following terms (i) Double Revolving Theory (ii) Lap winding and Wave winding (iii) Losses in DC machine Q#3(b): Describe the reasons that single phase IM is not self-starting.An 8 pole, lap connected armature has 500 conductors and its generated e.m.f is 120V. If theflux per pole is 20 mWb, then the speed of machine is, Choose the correct answer (a) 105 rpm (b) 420 rpm (c) 180 rpm (d) 720 rpm
- *urgent need in 20 mins please :((*A self-excited shunt generator has a field resistance of 56 ohms. When the generator delivers 2 kW, the terminal voltage is 5 V, while the generated emf is 7 V. Determine the armature resistance in ohm.An alternator has 6 poles. (a) At what speed must the machine be driven to develop 60 cycles? 25 cycles? (b) What frequency is developed if the speed is 1000rpm? Please give the complete solution for this problem. Thank you!An 8 pole, lap-wound armature has 1200 conductors and a flux pole is 0.06wb. Determine the e.m.f generated when the dc machine running at 600 rev/min.