Comparison Between Single Phase Generator and Three Phase Generator
by Starlight Generator dieselgeneratortechGenerator is widely used
in our daily life. When we buy generator, should we choose single-phase
generators or three-phase generator?
Application of
Generator:
Single phase generator -
Normally for residential use
Three phase generator -
For industrial use
Single-phase generator
produces one single voltage that alternates continuously. Because the power is
generated in one single wave, the level varies throughout its cycle. These
varying waves cause the power level to drop throughout the process, however, these
drops generally go undetected to the eye and ear in normal, residential and
smaller operations. Most single phase portable generator operate anywhere from
120 to 240 volts.
Three-phase generator is
driven by the prime mover to drive the DC-excited generator rotor to rotate at
a rotating speed. According to the principle of electromagnetic induction, the
three-phase stator winding induces an alternating current potential. If the
stator winding is connected to an electrical load, the motor has an AC power
output.
The three-phase
generator is widely used in driving mechanical equipment that does not require
speed regulation and high power because it has good characteristics of
maintaining constant speed when the power supply voltage fluctuates or the load
torque changes. In general, three phase generator is more powerful.
Single Phase Generator
VS Three Phase Generator
Single phase generators
are ideal for rural area since it doesn’t require constant, high voltage power.
Most of them operate anywhere from 120 to 240 volts. However, three phase
generators are ideal for heavy duty industrial application that require
constant power. The three phase generators are more efficient and safe power.
Diesel generator set usually uses three phase generator as its synchronous
generator.
The single phase is 220
volts, the phase-to-zero voltage; the three-phase is the phase-to-phase voltage
of 380V between a.b.c, and the electrical appliance is a three-phase 380V motor
or device. Three-phase power is mainly used as a power source for the motor,
that is, the load that needs to be rotated. Because the three phase differences
of the three-phase power are both 120 degrees, the rotor will not be stuck, and
the three-phase electricity is to form this "angle". Otherwise, it is
not necessary for people to engage in such complicated three-phase electricity.
Three-phase power, there
are 4 wires, 3 of which are 220v live wire, 1 is zero wire. Combining any one
of the live wire and the zero wire is the electric/Mains supply that we usually
say, and 220v electricity, but for the balance of three-phase electricity, it
is suggested to connect the corresponding load if possible. A diesel generator
capable of generating equal amplitudes, equal frequencies, and 120° phase
difference potential is called three-phase diesel generator.
Three-phase electricity
can provide a more reasonable power source. As a motor energy source, no other
things are needed. As long as the three-phase electricity is directly connected
to the motor, the motor can operate. If it is single phase motor, you need to
add a complicated thing to the motor to ensure the motor is running.
Usually, three phase
generators include the following main parts:
1. Stator - The stator
is the part of the motor or generator that is stationary. The stator is
composed of stator core, stator winding and base. The main role of the stator
is to generate a rotating magnetic field.
2. Rotor - The rotor of
the alternator is generally composed of core, slip ring and fan blade. The main
function of the rotor is to be cut by magnetic field line in a rotating
magnetic field to generate (output) current.
3. Exciter armature -
The armature is a part of the generator with a wire, which causes it to rotate
in the magnetic field due to the relative movement of the wire through the
magnetic field between the pole pieces, the current induced in the wire, or the
magnetic induction caused by the current through the wire.
4. Exciter stator
5. Rotating diode rack
6. AVR - Automatic
voltage regulator is a sealed electronic device, which controls the magnetic
field of the low power exciter and adjusts the rectifier output power of the
exciter armature, so as to meet the requirements of controlling the magnetic
field current of the main engine and stabilizing the output voltage of the
brushless generator. It is with low frequency and no input signal protection
device.
7. Bearing - Bearing is
an important component in modern mechanical equipment. Its main function is to
support the mechanical rotating body, reduce the friction coefficient during
the movement, and ensure its accuracy.
8. Armature winding –
The armature winding is composed of a certain number of armature coils
connected according to a certain rule. It is the circuit part of the DC motor,
and is also the part that generates the electromotive force and generates
electromagnetic torque for electromechanical energy conversion. The armature
winding is divided into two categories: DC armature winding and AC armature
winding.
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professional manufacturer of design, research and development, production,
manufacturing and supply, commissioning, maintenance of diesel generator set,
with equipment testing station, 43 years of production and manufacturing
experience, long-term supply of 20kw to 2500kw diesel generators for customers.
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Created on Jul 26th 2019 03:59. Viewed 2,864 times.