In induction type energy meter ,. is made up of Silicon Steel laminated assembly placed below the Aluminum disc. permanent magnet ferro magnet series magnet shunt magnet
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- A magnetic circuit with a cross-sectional area of 20 cm? is to be operated at 50 Hz from a 120 V rms supply. The number of turns required to achieve a peak magnetic flux density of 1.8 T in the core isUntitled Section Jalis 6 In d.c. generators armature reaction is produced by field current O armature current commutating winding current none of the mentioned compensating winding current *.The use of d.c. generators eliminated the use of rectifiers and ac supplies True False ODifferentiate the two generators shown in Figure 1.6.1-1 and Figure 1.6.1-2. The output voltage can be controlled by the adjustment of the d.c. field Permanent Magnet Field Electro- Magnetic Field Magnetic Field (Flux) Magnetic Field (Flux) IN ADJUSTABLE D.C SUPPLY Shaft Shaft Copper loop Slip-rings and Brushes Çopper loop Slip-rings and Brushes THIS TIME THE MAGNETS ARE STATIONARY, BUT THE COIL IS MOVING! www Output Output Figure 1.6.1-1 Figure 1.6.1-2
- 1.Consider the magnetic core below.All dimensions are shown on the figure. The core is made up of legs with 2 different cross-sectional areas.The depth of core is 10cm.The relative permeability of the core is 2000. The current in the magnetising coil is 1 A. The number of turns of the coil is 2000.Calculate: (i)the reluctances and draw the magnetic circuit (ii)the flux in the core (iii)Flux densities B and field intensities H in legs having different cross-sectional areas. (iv)Verify Ampere's Law. Depth: 10 cm I=1A 20cm 2000 Turns 65cm 15cm 15cm 50cm 15cm ndo un ofHow voltage is built up in dc shunt generatorThe task is to draw or illustrate the armature winding, using the description below: -4 poles -26 conductors -double layer -simplex wave winding
- Using figures (a) and (b), a magnetic flux density of 0.1 Wb in the air gap Determine the current I in the coil with 200 turns required to produceArmature winding of an alternator can also be described asThe length of a magnetic circuit in a moving iron instrument is 300mm.The coil around the soft iron core has 360 turns and takes a current of 1.75A.The core is square in section with sides of 20mm.Take the relative permeability of soft iron as 1100. Determine the magnetomotive force in the core. Determine the field strength. Determine the flux density. Determine the total flux.
- What is the air gap flux?What characteristic is desirable in the B–H curve for a prospective material to be used in a permanent magnet? In a motor or transformer? Explain.What is use of solenoid coil in the pressure to converter? a. To produce magnetic field in the LVDT b. To change the LVDT output c. To bring back the pivoted beam normal position d. To produce linear displacement in bellows