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133 - Thermal Analysis of a Three-phase Transformer
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Module:HT |
2011-02-28 |
Recently, the growing demand for energy conservation and highly efficient
transformers is raising the importance of reducing losses.The iron loss
of the core and the copper loss of the winding cause a raise in temperature
and reduction in the efficiency of a transformer because the energy is
released as heat.Evaluating the heat generated by the iron and copper losses
through simulation becomes advantageous when designing a transformer.This
example presents the use of a thermal analysis to obtain the temperature
distribution of the heat generated by the iron losses and copper losses
of the three-phase transformer.
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130 - Thermal Conductivity Analysis of Basic Geometry
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Module:HT |
2011-01-17 |
In recent years, the importance for methods to handle heat is growing as
electrical equipment is miniaturized and designed for high power.The thermal
conductivity and heat transfer coefficient needs to be modeled correctly
to accurately evaluate the heat dissipation characteristics of electrical
equipment. Therefore, if each part can be modeled correctly, the characteristics
of the entire device can be evaluated.This example presents the use of
a thermal analysis to obtain the thermal conductivity of each part using
basic cubes assuming they are a rotor core and stator core of a rotating
machine. The results for each part are evaluated, and then compared to
the theoretical calculation to evaluate their accuracy.
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127 - Resistance Heating Analysis
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Module:HT,TR |
2011-01-17 |
The characteristics of metal that are fabricated, such as shafts, worsen
as deformation occurs. Therefore, the fabricated deformation that occurs
during thermal processing is difficult to repair, but needs to be removed
so that a standard composition is achieved. The entire metal body needs
to be heated uniformly by the thermal processing to improve the characteristics.
It is advantageous to measure the temperature distribution when heating
the metal. A thermal analysis can be performed by using the Joule losses
that are obtained with a magnetic field analysis as the heat source in
JMAG. This example presents the use of a thermal and magnetic field analysis
to obtain the temperature distribution, heat generation density distribution,
and current density distribution of metal object heated by resistance heating.
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123 - Thermal Analysis of a Choke Coil
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Module:HT,TS |
2011-03-31 |
A choke coil is an electronic component use to prevent currents that exceed
the predetermined frequency. The heat generated by the iron losses of the
core and the copper losses of the coil inside the choke coil need to be
evaluated because of problems that can occur in the choke coil. The loss
distribution obtained with a magnetic field analysis can be used as the
heat source for a thermal analysis in JMAG-Designer. This example presents
the use of a thermal and magnetic field analysis to obtain the temperature
distribution using the iron losses and copper losses in the choke coil
as the heat source.
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118 - Thermal Analysis of a Busbar
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Module:FQ,HT |
2011-01-17 |
Current is carried through busbars, or wire bondings, as a supply line
of electrical power.Parts, such as components used in inverters to handle
variable frequencies, produce an increased amount of heat due to the resistance
cause by a skin effect that increases as the frequency of the current flowing
through the circuit gets higher.A design that accounts for the heat and
temperature distribution of each frequency is vital because the excess
heat causes a reduction in efficiency or damages the device.The temperature
distribution can be evaluated by treating the Joule losses obtained from
the magnetic field analysis as the heat source.This example presents the
use of a coupled magnetic field and thermal analyses to obtain the temperature
distribution in a busbar when the frequency of the power supply is changed.
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100 - Surface Heating Analysis of an Iron Sheet
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Module:FQ,HT |
2011-01-17 |
Induction heating is a method to produce heat using electromagnetic induction.
When a magnetic field generated by the coil produces eddy currents in the
iron sheet, the iron sheet is heated with the Joule heat produced by the
electric resistance between the eddy currents and the iron sheet. Compared
to other methods of heating, surfaces can be rapidly heated, or heating
can be localized.This example introduces an analysis to obtain the temperature
distribution on the surface of an iron plate heated by high-frequency induction
heating.
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85 - High-Frequency Induction Heating Analysis of a Constant Velocity Joint
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Module:FQ,HT |
2011-07-12 |
A constant velocity joint is located on both ends of the drive shaft in
the drive system of a car. The high-frequency induction heating may be
used to harden the inner ball track inside the outer ring of the constant
velocity joint, because the inner ball track is directly in contact with
the steal ball and the roller on the side of the inner ring. It is important
to take account of temperature rise and the timing of it inside of the
heated object for designing of induction heat system such as high-frequency
hardening. In JMAG, the loss distribution obtained from magnetic field
analysis can be used as a heat source for thermal analysis to obtain the
temperature distribution and the temperature variation caused by high-frequency
induction heating. This note presents the use of a coupled magnetic field
analysis and thermal analysis to obtain temperature distribution for the
outer ring of the constant velocity joint.
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51 - High-Frequency Induction Heating Analysis of a Gear
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Module:FQ,HT |
2011-01-17 |
The high-frequency quenching method uses induction heating to harden the
surface of objects.The temperature of the gear at the time of quenching
affects the hardness of the gear. The surface temperature distribution
varies with the coil geometry.In JMAG, the eddy current loss density distribution
obtained by magnetic field analysis can be used as a heat source for thermal
analysis.This note presents the use of coupled magnetic field analysis
and thermal analysis to obtain the temperature distribution of the gear
and the current density distribution of the coil.
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48 - High-Frequency Induction Heating Analysis of a Printer Roller
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Module:FQ,HT |
2011-01-17 |
One method of printing is to use a roller heated by induction heating.The heated
printer roller rotates, melting the toner, and then transfer the melted
toner to the paper. It is important that the roller is heated evenly.This
introduces the use of coupled magnetic field analysis and thermal analysis
to evaluate the eddy current loss density distribution, temperature distribution,
and temperature variation when the roller is rotating.
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45 - High-Frequency Induction Heating Analysis of an IH Cooking Heater
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Module:FQ,HT |
2011-02-28 |
An IH cooking heater uses induction heating to heat the pot for cooking
food. So it is important to heat the bottom of the pot uniformly, and also
to prevent flux leakage into the board box.In JMAG, the eddy current loss
density distribution obtained by magnetic field analysis can be used for
thermal analysis.This note presents the use of the coupled magnetic field
analysis and thermal analysis to obtain the temperature distribution of
the iron pot.
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44 - Resistance Heating Analysis of a Steel Sheet
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Module:HT,TR |
2011-02-28 |
Resistance heating is one method of heating used to fabricate steel sheets.
Resistance heating uses the heat produced by the Joule losses that occur
from the electric resistance when a current flows through a heated body.
This type of heating is used in hot formed pressing because an object can
be uniformly heated. Generally, more than 600 degrees Celsius is required
for hot formed pressing. The loss distribution obtained with a magnetic
field analysis can be used as the heat source for a thermal analysis in
JMAG-Designer. This example presents the use of a coupled thermal and magnetic
field analysis to obtain the temperature distribution of a resistance heated
steel sheet and the difference in the rising temperatures versus the making
current.
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18 - Thermal Analysis of an IPM Motor
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Module:TR,HT,LS |
2011-02-28 |
The enhancement in motors' efficiency and performance has increased the
importance of reducing the heat generation. JMAG offers thermal analysis
using the loss distribution obtained from a magnetic field analysis. This
case study shows the temperature and its variation in an entire motor.
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 | 10 - Thermal Analysis of a Radiant Heater UP!
| Module:HT,TR | 2012-04-10 | Quartz heaters, which are used in semiconductor manufacturing, are a kind of heating device that uses heat radiation phenomena. Thermal radiation is a mechanism of heat transfer, which is defined as the transport of heat through the transmission of electromagnetic waves between objects that have different temperatures, making transfer possible even through a vacuum. This objective is to transfer heat to a heated body uniformly by placing it near the heater, which has been heated by running current through the coil.
It is necessary to properly handle the effects of the 3D geometry of the heated body or the heat generated from the heater in order to see whether it is raising the temperature uniformly, so a thermal analysis is carried out.
This Application Note explains how to carry out a thermal analysis using the thermal radiation phenomenon between a heater and a heated body to obtain the differences in temperature distribution in the heated body with and without a shield.
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