Superimposed direct current characteristic analysis
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158 - Superimposed Direct Current Characteristic Analysis of a Reactor
Accounting for the Minor Hysteresis Loop
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Module:ST,FQ |
2011-01-17 |
A high-frequency reactor, used in equipment such as DC-DC converters, has
a high-frequency current accompanying the switching direct current. The
performance of a reactor is evaluated by a stable inductance in a wide
direct current region superimposed with alternating current components.
The initial magnetization curve is typically used for the magnetization
properties of electromagnetic steel sheet in the magnetic field analysis,
but the operating points are on the miner loops of the hysteresis curve
when a high-frequency alternating current component is superimposed on
the direct current component. (Fig. 1) Differences in the superimposed
direct current characteristics become apparent when the minor loops differ
significantly from the initial magnetization curve. In this case, the inductance
needs to be obtained by taking into account the minor loop.
This example presents the use of a magnetic field analysis to obtain the
superimposed direct current characteristics of a high-frequency reactor
accounting for the minor hysteresis loop by using the frozen permeability
condition.
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99 - Superimposed Direct Current Characteristic Analysis of a High Current
Reactor
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Module:TR |
2011-01-17 |
High current reactors with a high-frequency have a superimposed current
composed of a high-frequency ripple and direct current.The performance
of a reactor is evaluated by a stable inductance in a wide direct current
region.The gap that is designed to prevent magnetic saturation from the
core largely affects the inductance. The gap is a vital parameter of the
reactor's design.This example analyzes the superimposed direct current
characteristics of a high current reactor with a high frequency.
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60 - Superimposed Direct Current Characteristic Analysis of a Reactor
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Module:TR |
2011-01-17 |
A high-frequency reactor, used in equipment such as DC-DC converters, has
a high-frequency current accompanying the switching direct current.The
performance of a reactor is evaluated by a stable inductance in a wide
direct current region.The gap that is designed to prevent magnetic saturation
from the core largely affects the inductance. The gap is a vital parameter
of the reactor.
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