Dynamo AC/DC

KD 10.5

Category: SCHOOL/LABORATORY >> PHYSICS
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Show the conversion of mechanical energy into electric energy and principle of working of simple AC and DC Dynamo. This model uses the basic assembly as the motor, but is mounted on a base- plate 230 x 90 mm approximate, which also carries a hand-drive pulley 120 mm dia. coupled to the smaller dynamo pulley by a rubber belt to give a step- up ratio. Electrical output is via a pair of 4 mm sockets and a light emitting diode is provided as simple output indicator. The model may also be used as a motor on a 6-8 V D.C. supply.

Shows the conversion of mechanical energy into electrical energy and principle of working of simple AC and DC dynamos. Complete assembly mounted on a base and capable of generating both AC and DC simultaneously as indicated by the glowing of bulb present on the base. A two-pole armature wound from enameled copper wire on insulated bobbin is mounted in shaft supported on moulded plastic legs on either side and is positioned between two curved iron strips. The shaft carries split ring commutator on one side for DC output and slip ring commutator on the other side for AC output, which is available through 4mm sockets mounted on respective sides and selectable through a sliding switch. Magnetic field provided by a permanent magnet on top of curved strips. The complete arrangement driven by a hand-cranked bigger driving wheel with handle through an endless rubber belt.