2 Methodology
The production of electricity using low wind and water
flows is a rather complicated process. Since many
electrical generators generate high rated speeds,
additional reducing gears are required. The use of
reducing gears leads to a decrease in system efficiency
and an increase in capital costs. To create an efficient
generator for low-speed wind and water currents, it is
necessary to determine its optimal size [7-9]. At the next
stage, a virtual model is created based on its optimal
dimensions; its electromagnetic properties and resistance
to mechanical stress are checked. After analyzing the
results, a copy of the device is created. If the device is
created without justification and insufficient analysis at
the above stages, this will lead to an increase in the time
and cost of manufacturing the device. In his research,
Ansys Maxwell creates and simulates a virtual model of
a bipolar permanent magnet generator of two types. The
purpose of the virtual model analysis is to virtually
observe the processes occurring in both generators,
observe the magnetic induction lines of force generated
in them and compare the output parameters. By doing
such research, researchers can get many impressions
from creating a new model of a generator that works
effectively in conditions of low wind and water currents.
During the design process, the dimensions of all parts
of the electric machine are entered (the outer and inner
diameters of the stator, the number of poles, the number
of grooves and the dimensions of the coil diameter and
the connection group are entered). The ANSYS RMxprt
program in the Maxwell program is a special program
for the design of 19 types of electric motors, the program
is characterized by the ease of entering the parameters
used in the design of motors. It is much more convenient
to use the materials in the program library to show what
material the machines are made of, as it includes the
properties of the materials i.e. magnetic permeability,
resistance, density and a number of other properties.
The calculation used the ANSYS RMxprt program
from the Maxwell program, which initially selected the
generator we wanted to calculate from the electric
motors or generators offered by the program, i.e. the
synchronous generator shown in the first column (fig-1).
In step 1, the multipolar synchronous generator was
designed in the Ansys Maxwel program and the basic
parameters of the machine were entered i.e. number of
poles = 2, rotor position = external rotor, speed = 250
rpm, control method = alternating current (AC), then the
stator dimensions on the inside of the machine section
were entered, i.e. the outer diameter of the stator = 550
mm, the inner diameter of the stator = 380 mm and other
additional parameters, the rotor parameters after the
stator dimensions were entered and a 10 mm thick XG-
196/96 type magnetic inner part covering 0.9 part.
The fact that the device has such functions greatly
contributes to the fact that the electric vehicle can
operate in real time.
After entering all the values, the analysis parameters
were adjusted to analyze the synchronous machine. The
machine is a generator, output power 3000 W, output
voltage 220 volts, rotation speed 250 rpm, outdoor air
temperature 25 ° C.
After analyzing the synchronous machine, a
command in the form of diagrams was selected in the
panel at the top of the program. With this command, we
can see many characteristics of the analyzed machine in
the form of diagrams.
The following list shows the values of the
synchronous generator calculated in the Maxwell
program.
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