Application Catalog


2017-08-31

Transformer / Reactor



206 - Temperature Analysis of an Oil-Immersed Transformer Using a Coupled Magnetic Field and Thermal Fluid Analysis

206 - Temperature Analysis of an Oil-Immersed Transformer Using a Coupled Magnetic Field and Thermal Fluid Analysis

Large power transformers are used to transform high voltage power generated at a power station into power that can be transmitted. For the structure of the transformer, oil-immersed transformers, which fill the inside of the tank that contains the transformer body with insulating oil for cooling and insulation, are often used.

Module: FQ, LS | 2014-12-25




204 - Copper Loss Reduction Effect Analysis of Switching Transformers using Litz Wire

204 - Copper Loss Reduction Effect Analysis of Switching Transformers using Litz Wire

Flyback converters are used for various applications such as power supply circuits, which is suitable for small electrical power that realizes switching power supply. Since there are not many parts and it is a very simple structure, it has realized power supply circuits that limit manufacturing cost.

Module: TS | 2015-04-24




203_PowerTransformer_No-LoadTest.html

203_PowerTransformer_No-LoadTest.html

Large-scale power transformers are expected to be highly-reliable as machinery that will support the industry infrastructure, but unfortunately, it is impossible to conduct tests connecting to actual load. For this reason, tests of special circuit structure including no-load tests and contradiction tests are run.

Module: FQ, LS | 2014-12-15




202 - Core Stray Loss Analysis of Power Transformer

202 - Core Stray Loss Analysis of Power Transformer

Stray loss is mainly caused by leakage flux from winding, but structures closer to the winding will tend to be affected easier by leakage flux. The ratio of stray loss relative to all losses may not necessarily be large but heat is generated in certain areas and may become an issue in the operation of transformers.

Module: FQ, LS | 2014-12-15




185 - Analysis of Stray Loss in a Power Transformer

185 - Analysis of Stray Loss in a Power Transformer

Transformers are made to be used long-term, so it has become an important design policy to control running costs from losses. These losses include copper loss in the coil and iron loss in the core. In high-capacity transformers, however, there is also stray loss in the tank from flux leakage from the core.

Module:FQ, LS | 2014-04-25




184 - Reactor Sound Pressure Analysis taking Magnetostriction into Account

184 - Reactor Sound Pressure Analysis taking Magnetostriction into Account

Reactors are used in all sorts of systems related to power systems. For example, they fill the role of making the current pulsation between an inverter and a motor smoother. Reactor vibration noise can also be an issue and countermeasures are sought from analysis.

Module:DS,TR | 2016-02-25




158 - Superimposed Direct Current Characteristic Analysis of a Reactor That Accounts for Minor Hysteresis Loops

158 - Superimposed Direct Current Characteristic Analysis of a Reactor That Accounts for Minor Hysteresis Loops

High-frequency reactors used in equipment like DC-DC converters have a high-frequency current accompanying the switching direct current. The reactor's performance requires a stable inductance in a wide direct current region that is superimposed by alternating current components.

Module:FQ,ST | 2015-04-24




152 - Electromagnetic Force Analysis of Short-circuited Power Transformer Coils

152 - Electromagnetic Force Analysis of Short-circuited Power Transformer Coils

A transformer is an electrical device that uses electromagnetic induction to convert the voltage level of alternating current power. Electromagnetic force is produced by the current and magnetic field in a transformer's coils while it is converting power.

Module:FQ | 2013-12-17




151 - Insulation Evaluation Analysis of a Power Transformer

151 - Insulation Evaluation Analysis of a Power Transformer

A transformer is an electrical device that uses electromagnetic induction to convert the voltage level of alternating current power. Among transformers, power transformers that are used in power conversion have extremely high electric fields applied to their coils, ...

Module:EL | 2013-12-17




148 - Loss Analysis of a Power Transformer (Flyback Converter)

148 - Loss Analysis of a Power Transformer (Flyback Converter)

A flyback converter is a well-known system for small capacity power supplies in the several-dozen W class. They are cheap and have a simple structure, so they are widely used as converters for pressurization in home appliances.

Module:DP,LS,TR,TS | 2014-06-25




146 - Analysis of Stray Loss in a Transformer

146 - Analysis of Stray Loss in a Transformer

Transformers are made to be used long-term, so it has become an important design policy to control running costs from losses. These losses include copper loss in the coil and iron loss in the core. In high-capacity transformers, however, there is also stray loss in the tank from flux leakage from the core.

Module:FQ,HT,LS | 2013-06-25




143 - Inductance Analysis of an Air Core Coil

143 - Inductance Analysis of an Air Core Coil

Electric components such as choke coils and chip inductors are used for purposes such as reducing electromagnetic noise by taking advantage of their own inductance. Air core coils have smaller inductance than those with cores, but because they do not use cores with nonlinear magnetization properties,...

Module:ST | 2013-06-25




133 - Thermal Analysis of a Three-phase Transformer

133 - Thermal Analysis of a Three-phase Transformer

One of the most important principles in transformer design is how low loss can be kept to during operation. Iron loss in the transformer's core and copper loss in its coil become heat sources in addition to reducing efficiency, so they need to be understood and reduced from the standpoint of heat resistant design for all parts,...

Module:HT | 2013-06-25




132 - Loss Analysis of a Three-phase Transformer

132 - Loss Analysis of a Three-phase Transformer

Mid- and large-sized power transformers need to be able to operate over the long term, so they are always required to control running costs from losses. Iron loss is one of the main losses in a transformer, and it can lead to temperature increases and efficiency decreases because it consumes electric power as heat...

Module:FQ,LS | 2013-06-17




123 - Thermal Analysis of a Choke Coil

123 - Thermal Analysis of a Choke Coil

A choke coil is an electric component that is intended to filter high-frequency current. The current generated in the choke coil has offsets caused by the skin effect, proximity effect, and leakage flux near the gap, so it is distributed both inside of and between the wires. Iron loss generated in the core is also distributed by...

Module:HT,TS | 2012-04-25




117 - Iron Loss Analysis of a Transformer

117 - Iron Loss Analysis of a Transformer

Mid- and large-sized power transformers need to be able to operate over the long term, so they are always required to control running costs from losses. Iron loss is one of the main losses in a transformer, and it can lead to temperature increases and efficiency decreases because it consumes electric power...

Module:FQ, LS | 2013-06-17




110 - Loss Analysis of a Choke Coil

110 - Loss Analysis of a Choke Coil

A choke coil is an electric component that is intended to filter high-frequency current. Measures to evaluate the heat source as well as the core iron losses that occur within the choke coil and the copper losses of the coil that decrease efficiency need to be used for this analysis.

Module:FQ, LS, TS | 2012-04-25




107 - Current voltage characteristics analysis of flyback converters

107 - Current voltage characteristics analysis of flyback converters

DC-DC converters such as flyback converters control current of primary / secondary winding with switch operation, and transmit electrical power on the load side using diodes and condensers. Depending on its application, there is a need to satisfy current voltage characteristics but it is affected by...

Module:DP | 2014-11-26




105 - Leakage Inductance Analysis of a Transformer

105 - Leakage Inductance Analysis of a Transformer

Inductance is an important physical quantity that determines a transformer's response characteristics against electric signals. Inductance is generally categorized into self-inductance and leakage inductance. Self-inductance is an indicator of to what extent the transformer can produce magnetic flux, and...

Module:FQ,TS | 2015-12-25




101 - AL-Value Current Characteristic Analysis of a Choke Coil

101 - AL-Value Current Characteristic Analysis of a Choke Coil

A choke coil is an electric component that is intended to filter high-frequency current. The AL-value is a vital parameter in a choke coil design that determines the cutoff frequency of a high-frequency current.
Because the AL-value is often set as a design specification and AL-value is a nonlinear magnetic property

Module:ST | 2016-12-06




99 - Superimposed Direct Current Characteristic Analysis of a High Current Reactor

99 - Superimposed Direct Current Characteristic Analysis of a High Current Reactor

High-frequency, high-current reactors have a current composed of direct current with high-frequency ripple superimposed on it. In terms of reactor performance, stable inductance over a wide range of direct current is desirable. Also, the gap installed to prevent magnetic saturation in the core has a large effect...

Module:TR | 2013-06-17




97 - Sound Pressure Analysis of a Transformer

97 - Sound Pressure Analysis of a Transformer

In recent years, the demand to reduce vibration and noise is growing while the requirements for higher efficiency and smaller and lighter transformers grow with environmental conservation trends. The primary cause of noise for transformers is the electromagnetic vibrations and the resonance phenomena at the eigenfrequency...

Module:DS,FQ | 2014-08-26




81 - AL-value Analysis of a Choke Coil

81 - AL-value Analysis of a Choke Coil

A choke coil is an electric component that is intended to filter high-frequency current. The AL-value is a vital parameter in a choke coil design that determines the cutoff frequency of a high-frequency current.
The AL-value varies greatly depending on gap width, so it is effective for the advance study of a design...

Module:ST | 2013-06-25




78 - Loss Analysis of a Sheet Coil Transformer

78 - Loss Analysis of a Sheet Coil Transformer

Power transformers need to be able to operate over the long term, so they are always required to control running costs from losses. Iron loss is one of the main losses in a transformer, and it can lead to temperature increases and efficiency decreases because it consumes electric power as heat in a magnetic material.

Module:FQ,LS | 2013-12-17




75 - Iron Loss Analysis of a Reactor

75 - Iron Loss Analysis of a Reactor

Reactors are installed on the input or output side of inverter circuits. Because they are required for long-term operation, the ability to control running costs from losses is an important challenge for their design. Iron loss is one of the major types of losses in a reactor.

Module:FQ,LS | 2013-12-17




61 - Current Distribution Analysis of a Choke Coil

61 - Current Distribution Analysis of a Choke Coil

A choke coil is an electric component that is intended to filter high-frequency current.
The current in a choke coil's interior produces local heat generation because of the skin effect, proximity effect, and current offsets caused by leakage flux near the gap.

Module:DP,TS | 2012-11-30




60 - Superimposed Direct Current Characteristic Analysis of a Reactor

60 - Superimposed Direct Current Characteristic Analysis of a Reactor

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.

Module:TR | 2013-04-26




52 - Inductance Analysis of a Sheet Coil Transformer

52 - Inductance Analysis of a Sheet Coil Transformer

Power transformer requires large currents, so their geometry tends to be large. This means that they are particularly hard parts to miniaturize when electrical product designs get smaller. The sheet coil transformer introduced in this Application Note achieves thinner dimensions by winding its coil in a thin sheet.

Module:FQ | 2013-10-25




32 - Analysis of a Transformer

32 - Analysis of a Transformer

A transformer is an electrical device that uses electromagnetic induction to convert the voltage level of alternating current power. In an ideal transformer the secondary voltage is constant regardless of the load, but in reality it tends to vary with the size of the load and the power factor.

Module:FQ | 2013-12-17




4 - Sound Pressure Analysis of a Reactor

4 - Sound Pressure Analysis of a Reactor

Reactors are used in a variety of electric power systems. For instance, they fill the role of making the current pulsation between an inverter and a motor more smooth. On the other hand, the sound that originates from a resonance phenomenon between an electromagnetic force and an eigenfrequency can become a problem.

Module:DS,TR | 2016-02-25