High frequency transformers can work efficiently only if two important conditions are fulfilled – reliability and electromagnetic compatibility. Reliability has always been paid attention to, while electromagnetic compatibility has come into focus only in recent years because of the increasing awareness towards environmental protection. Reliability can be defined by the specific conditions of usage on which the high frequency power transformers can normally work. The temperature in which the transformer works is one of the very important factors to be considered. For some soft magnetic materials, the Curie point is very low, which is why they are very sensitive to temperature. One such example is manganese zinc sift ferrite that has a very low Curie point, which is why it’s working temperature is very limited.
Need to install a new transformer or replace an existing one? Just come up to Miracle Electronics, the leading transformer manufacturer in India and you won’t have to worry about installing newer transformers for a long time again! Here are some essentials you need to know about transformers and their installation.
Wire harness is a flexible tool that efficiently combines multiple wires into a bunch and wraps them in a cover of insulating material. This tool has been seen to be highly popular in the automotive industry for special purposes. Automobiles require different types of wire harnesses to keep them running smoothly and efficiently. Wire harnesses in such vehicles act as links between the various components and devices mounted on automobiles so that power and information can be easily transmitted between them, assisting in smooth functioning. Automotive wire harnesses are an assembly of wires that transmit electrical power or signals in automobiles, and are better safeguarded against the impact of vehicle vibrations, as compared to individual electric wires. They are also more secure from abrasions and moisture. Technical developments in the automotive segment have amplified the demand of many high-end microelectronics and security features into vehicles. The automotive wire harnesses facilitate safe, simple and compact functioning of electronic devices installed in the vehicles. Thus, we can say that the global automotive wire harness market is observing a rapid growth due to the increasing automobile industry.
Three-phase systems are very rare as compared to single-phase systems, but they are actually more economical. Multiple single-phase transformers can be grouped together to provide power between three-phase systems in different configurations. But, if three-phase transformers are used instead, the same performance can be brought about with lesser material requirement, lesser size and lesser weight. Thus, it is because three-phase transformers use lesser material to transmit same amount of electrical power that they are proved to be more economical.
Transformers are used at all levels of the industrial infrastructure, right from power generating stations up till the customer facilities; thus they play a very significant role in our lives. The oil present in transformers performs the functions of insulating as well as cooling. Therefore, for secure functioning of a transformer, the dielectric quality of the oil needs to be maintained. As the oil ages, it deteriorates in quality, which is why the oil should be tested periodically.
A transformer can help in transfer of electrical energy between circuits through the help of electromagnetic induction, only with the presence of a magnetic core within it. This magnetic core is a piece of magnetic material that has high magnetic permeability to direct magnetic fields within the transformer. The magnetic field is created when a coil of wire carrying a current is wound around the core. This magnetic field can be increased by a factor of thousands with the presence of the core!
How much power, voltage and current a transformer can provide depends on the properties of the core. The dimension and geometry of the core, the properties of the core’s material, the operating temperature of the core, and the amount of air gap in the magnetic circuit are some factors that determine the properties of a transformer.
Magnetic cores used for industry applications are available in different sizes, frequencies, voltage ratings and many different types. Different industry types use different core types. Here is a brief overview of the three main types of cores used in transformers.
Solid iron or steel
Steel and iron have been one of the most common materials used for constructing cores. They serve as an excellent pathway for magnetic flux, allowing the magnetic field to be very high without saturating the material. They provide sturdy magnetic fields and generate enough heat required, thus boosting the overall performance of the transformer. However, being a good conductor of heat, they also result in massive heat generation and thus inefficiency at very high operating frequencies. This is the reason why iron and steel are becoming fairly uncommon today.
Laminated silicon steel
These cores have thin silicon alloy laminations stacked one over the other. These alloys provide great magnetic pathways but, don’t conduct electric current. Instead of a solid piece of iron or steel, these thin layers result in reduced eddy currents and electrical pathways. Thus, the efficiency of transformers using these alloys increases greatly. With reduced vortex current and heat dissipation, these magnetic cores make the transformers last longer, thus requiring lesser maintenance efforts and costs. These cores are highly replacing solid iron and steel cores.
Amorphous steel cores are made up of many layers of paper-thin metallic tapes stacked together. They work on the same idea as laminated silicon steel but, with better efficiency. This is because the super thin strips reduce the flow of eddy currents even further, due to which there are lower losses and higher operating efficiency even at higher frequencies. These cores are commonly used in medium frequency and high efficiency transformers.
These three different types of cores are used to build different types of transformers like step-up, step-down, auto, three-phase, rectifier and many others. Whatever your industrial need, choose the one that suits your requirements the best and opt to buy it from Miracle Electronics, the largest transformer manufacturer in India, who provides 100% assurance and guarantee of high quality and tested products.