**Contents**show

## What is voltage regulation method?

Voltage regulation is defined as the change in terminal voltage expressed as a fraction of full load rated voltage when the load at a given power factor is removed while keeping the speed and field current constant. Voltage regulation formula, Voltage regulation **= (E _{F} – V_{T}) / V_{T} in P.U**.

## What are the methods of determining regulation of alternator?

**The various indirect methods of determining voltage regulation are,**

- Synchronous Impedance Method or EMF Method.
- Ampere-turn Method or MMF Method of Voltage Regulation.
- Zero Power Factor Method or Potier Method.
- ASA Modification of M.M.F. Method.

## Which of the following methods is best for finding the voltage regulation?

01․ Which of the following voltage regulation method is accurate ? In Potier Triangle or **ZPF method**, voltage quantities are calculated on emf basis and mmf quantities are calculated on mmf basis. Therefore, ZPF method is most accurate among all these four methods.

## Which method of determining voltage regulation is more accurate?

The **O.C.C** taken on no-load accurately represents the relation between MMF and voltage on load. The leakage reactance voltage is independent of excitation.

## What is voltage regulation of 3 phase alternator?

The voltage regulation of an alternator is the **difference between the no- load voltage and the full-load voltage exprssed in percent of full load voltage** or it is the rise in terminal voltage when a given load is removed, while the excitation and speed of alternator remaining constant, . i.e.

## 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**.

## Why is the determination of voltage regulation important?

**The measure of how well a transformer can maintain a constant secondary voltage** is called voltage regulation. The lower the percentage, the more stable the secondary voltage and the better the regulation it will give.