A 1.5 hp Permanent magnet motor generates a voltage of 90 V when the motor runs at 2900 r/mine and the armature current 14.5 A. calculate the following: a) The number of conductors on the armature b) The value of the counter-emf at full load c) The flux per pole, in milliwebers [mWb] The following details are given: Armature diameter: 73 mm armature length: armature slots 115 mm 20 commutator bars: 40 turns per coil: 5 Armature resistance at 20°C: 0.34 2. THO Hel

SOLVE AND SHOW YOUR COMPLETE SOLUTION. ANSWERS SHOULD BE IN TWO DECIMAL PLACES.  The armature of a two-pole dc machine has 30 slots, each slot has 4 conductors each. during its operation, only 75% of the conductors are directly under the pole. each pole measures 2 inches by 3 inches and produces ten million maxwells of flux. the armature core is 12 inches in length and 3.5 inches in diameter. the total resistance of the winding is 2 ohms. b) determine the total generated voltage if the armature is running at 1000 rpm and its winding is simplex lap connected.

In the figure is shown a current of 50 A in a wire 120 cm long and at an angle of 45° to a magnetic field of flux density 6.0 x 10 -4 Wb/m2. What are the magnitude and direction of the force on this wire?

The total conductor of the direct current generator shown in the figure is 1440. The length of the armature is 30cm, the magnetic flux of a pole is 0.8 Tesla and the armature rotates at a speed of 4 m / s. Find the value of the voltage generated by the armature according to the position in the figure.

Find the ratio of exciting currents with and without a 1mm air gap in a magnetic core of mean length 50cms and relativepermeability of 2500 and cross-section of 1cm 2 in a 1000 turn coil wound on the core. The flux density in both cases must be1T.

Q2. A 4-pole, wave-wound armature has 72 slots with two coil-sides per slot, each coil has four turns. If the flux per pole is 20 mWb and the armature rotates at 720 rpm, what is the induced emf across the armature? (Ans. 276.48 V) 03 A 4 nolo nmeghine he umoture vith 00 clots ond o gonduetors nor elet the fluy nor nole is 005

Describe in details three practical applications for magnetostatic