Kajigrel Introduction of Batteries Lighting protection of over head Current research on artificial spin ice ASI systems has revealed unique hysteretic memory effects and mobile quasi-particle monopoles controlled by externally applied magnetic fields. Earth Leakage Circuit Breaker Furthermore, the energy cost to induce magnetic switching is only aJ, indicating that magnetoelastic control kf antiferromagnetism is substantially more energy efficient altenator other approaches. Nano fuel cell 2. List of Seminar Topics — Lbrce. Control of excitation system Electrical Grid Security 3. EHV transmission system Based on the transfer functions derived from the above mentioned analysis, regulators for a closed-loop control are designed.
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The Motor field Rheostat should be kept in minimum resistance position. The Alternator field should be kept open throughout the experiment. The direction of rotation due to prime mover and due to the Alternator run as the motor should be same. The name plate details of the motor and alternator are noted. Connections are made as per the circuit diagram. To obtain the slip and the maximum oscillations of pointers, the speed is reduced slightly lesser than the synchronous speed.
Maximum current , minimum current , maximum voltage and minimum voltage are noted. The direct and quadrature axis resistances and reactances are calculated. Draw the line OA vector that represents the rated voltage v. Draw the line from the origin through the point D, which consist the no load voltage Eo. Draw the pole axis through origin, which should be perpendicular to vector OD. Draw the perpendicular line tom the pole axis from the same point E which should be passed through the point B[where, Vector OE represents direct access current Id and vector EB represent quadrature axis current Iq ].
Draw parallel line i. Find out voltage regulation by using the suitable formula.
REGULATION OF THREE-PHASE SALIENT POLE ALTERNATOR BY SLIP TEST
It controls output by sensing the voltage Vout at a power-generating coil and comparing it to a stable reference. The error signal is then used to adjust an average value of the field current. Most cheap portable generators have fixed excitation. In such machines, when an alternator is loaded, its terminal voltage drops due to its internal impedance.
Automatic Voltage regulation technology
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