What is alternator voltage regulation?
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The voltage regulation of an alternator is defined as the ratio of the rise in voltage when full-load is removed (field excitation and speed remaining the same) to the rated terminal voltage.
What is salient pole alternator?
Salient Pole Synchronous Alternator: Salient pole Generators will have large diameter and short axial length. Pole shoes cover 2/3 of the pitch. Salient Poles are laminated in order to reduce eddy currents. They are used in hydraulic turbines or diesel engines.
What are the types of regulation of alternator?
For large alternators, the three indirect methods are used to determine the voltage regulation they are as follows:
- Synchronous Impedance Method or EMF method.
- Ampere-turn method or MMF method of Voltage Regulation.
- Zero Power Factor method or Potier Method.
What is the regulation define it related to alternator?
The voltage regulation of an alternator or synchronous generator is defined as the rise in the terminal voltage when the load is decreased from full-load rated value to zero. The speed and field current of the alternator remain constant.
What is the difference between salient pole and non salient pole?
The third difference between salient pole and cylindrical pole is that the cylindrical pole (non-salient) design is much more durable and has a much lower winding loss than a salient pole unit. Next, its diameter is smaller but the axial length is longer. Also, both winding and noise are less than salient polar rotors.
What is importance of voltage regulation in alternator?
A knowledge of voltage regulation at different power factors are usually essential because it shows how closely a machine will maintain its voltage under the various conditions of load. This knowledge is also important from the point of voltage control, parallel operation and protection of the alternators.
What is difference between salient pole and non salient pole?
What is EMF and MMF method?
EMF is the force that is responsible for driving the electrons in an electric circuit. Magnetomotive force is abbreviated as MMF. MMF is the driving force required to drive the magnetic flux through the circuit.
How will you recognize whether given alternator is cylindrical pole or salient pole alternator?
What is percentage regulation?
Answer: Voltage regulation is the measure of how well a power transformer can maintain constant secondary voltage given a constant primary voltage and wide variance in load current. The lower the percentage (closer to zero), the more stable the secondary voltage and the better the regulation it will provide.