Table of Contents

## How do you find the frequency of a generator?

Generator Frequency (f) = Number of revolutions per minute of the engine (N) * Number of magnetic poles (P) / 120. In other words, f = N*P/120.

How the voltage is generated in generator?

Voltage is induced in coils by the rate of change of the magnetic field through the coils as the machine rotates. This induced voltage is inherently alternating in form since the coil flux increases and then decreases, with a zero average value.

### What is high speed generator?

A high-speed motor or generator combined with active magnetic bearings is a 360-degree solution for increasing energy efficiency, reliability and compactness. Some of the advantages of switching to permanent magnet motors, include: Zero excitation power. Efficiency of 95% or higher. Smooth rotor.

What is the difference between synchronous and asynchronous generator?

A synchronous generator is essentially the same machine as a synchronous motor. The magnetic field of the rotor is supplied by direct current or permanent magnets. The output frequency of an asynchronous generator is slightly (usually about 2 or 3%) lower than the frequency calculated from f = RPM x p / 120.

#### What is a 3-phase synchronous generator?

A three-phase synchronous machine consists of an inner rotating cylinder called the rotor and an outer stationary housing called the stator as shown in Figure 5.2. A shaft runs through the rotor and it is balanced on bearings.

Why do generators run at 3600 RPM?

The alternator on a 3600 RPM Diesel generator spins twice as fast so it can get by with less than half of the copper of an 1800 RPM alternator. Due to the higher engine speed, these 3600 RPM generators wear out much sooner.

## Can you operate a 6o Hz synchronous generator at 50 Hz?

If you operate a 3600 rpm (60 Hz) synchronous generator at 3000 rpm (50 Hz), the power output will be reduced, simply because the mass of the rotor remains constant and you reduce its rotational speed.

Does generator produce AC or DC?

Generators are capable of both AC and DC power. Alternators usually are made for A/C (alternating current) applications, hence the name “alternator.” The inherent design differences allow generators to produce immense amounts of wattage per kilowatt and are, therefore, much more substantial.

### What is the output voltage of a generator?

Home standby generators and most portable generators can supply either 120 volts or 240 volts and do it at the same time. Different voltages make it important to understand why we rate generators in watts.

What is low RPM generator?

The low RPM generators will start generating power at around 100 rpm and remain efficient up to about 600 rpm. Their “sweet spot” is often around 400 rpm but it will vary from generator to generator.