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- A 6 pole wave wound d.c. shunt generator has 500 conductors. A generator delivers 50 kW of power at 250 voltage at full load. The resistance of the field circuit is 125 2. Actual brush shift is 10°. Then find the demagnetizing and cross magnetizing ampere turns per pole and how many additional turns must be wound on each pole to eliminate the demagnetizing effect.the magnetic strengh of the field poles on a perment magnet DC motor cannot be varied a- true b- falseAn 6-pole d.c generator has 300 armature conductors, and a useful flux of 14 mWb per pole. What will be the em.f. generated if it is lap-connected and runs at 1420 rpm? What must be the speed at which it is to be driven produce the same e.m.f. if it is wave-wound?
- The armature of 6 pole d.c. generator has a wave winding containing 664 conductors.Calculate the generated e.m.f. when flux per pole is 0.06 water and the speed is 250 r.p.m. At what speed must the armature be driven to generate an e.m.f. of 250 V if the flux pole is reduced to 0.058 weber?The voltage induced by a 6-pole DC generator running at 600 [RPM] with 100 slots on the armature and each armature coil has 4 turns with a flux per pole of 0.01 [Wb] isA 4 pole, lap wound, d.c. generators has 42 coils with 8 turns per coils. It is driven at 1120 r.p.m. If useful flux per pole is 21 mWb, calculate the generated e.m.f. Find the speed at which it is to be driven to generate the same e.m.f. as calculated above, with wave wound armature.
- The armature of a 4-pole, shunt generator is lap wound and generates 216V when running at 600 rpm. The armature has 144 slots with 6 conductors per slot. If this armature is rewind, wave connected, find the emf generated at the same speed and flux per pole,A 4-pole d.c. shunt generator has 36 slots with 10 conductors in each slot. The flux is 0.03 wb and the speed is 750 rpm. Calculate the e.m.f. generated if the armature is (a) lap wound and (b) wave wound.A 900 rpm, 4 pole lap wound shunt motor takes 300 A. The flux per pole is 0.02 Wb and the armature has 1500 conductors. The shunt field takes 4 A of current. Solve for back emf (V).
- T-a. The direction of rotation of a single-phase split-phase motor can be change by........ a) reversing the connection of the start winding b) reversing the connection of the run winding c) reversing the connection of the start and run winding at the same time d) "a" or "b", not "c" T-b. Single-phase split-phase motors using an electrolytic capacitor in the start winding circuit should not be cycled more than about__________ time per hour. a) 8 b) 12 c) 24 d) none of the above T-c. When replacing the capacitor in a capacitor-start induction-run motor, one must be sure to replace the bad capacitor with__________ . a) a smaller one b) one of the same size c) a larger one d) none of the above1. The armature of a four pole dc shunt generator is lap wound and generates 216V when running at 600 rpm. Armature has 144slots, with 6 conductors per slot. If this armature is rewound, wave connected, find the emf generated with the same flux but running at 500 rpm. Eg = 360VThe armature of a two-pole generator is rotating at 3600 r/min. The armature has a simplex lap winding with a total of 1504 conductors. Determine the generated voltage when the flux per pole is 600,000 x 10-8 Wb. 5.5
