What Are The Requirements For High Frequency Power Transformers?

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.

High frequency transformers are used to complete many functions, out of which the power transmission is of high importance. For power transmission, the transmission mode of the transformer power, the voltage applied to the primary winding, and the magnetic flux in the magnetic core changes induce the secondary winding voltage, which leads the electrical power from the primary to the secondary. In this power transmission process, the magnetic core is divided into one-way and two-way magnetic flux changes. In one-way change, the flux density changes from the maximum value to the residual flux density. Let us suppose that the maximum value is ‘X’, the residual flux density is ‘Y’, and the flux density change value is ‘Z’. Then, Z = X – Y. In case of two-way change, the mode of operation varies from +X to –X, or from –X to +X, and in this case, Z = 2X. Whether it is one-way or two-way, the transformer power transmission mode is not directly related to the core permeability.

For inductor power transmission mode, the primary winding input power leads to core excitation, which then leads to magnetic energy storage, and then induces secondary winding voltage by demagnetization, which ultimately releases power to the load. The transmission power is determined by the inductance core energy storage, which is in turn determined by the inductance of the primary winding. However, inductance and magnetic permeability of the core, and energy storage are not directly related to the magnetic flux density. Since the power transformer modes are different, the required core parameters are also different. Also, the high frequency power transformer design, material core, and choice of parameters are very important considerations.

If you are looking for the best power transformers in India for any residential or commercial applications, you can rely on Miracle Electronics, the leading power transformer manufacturer in India. Miracle Electronics’ power transformers are exclusively designed to provide the highest level of safety to the operator by regulating and stepping down voltages to machine tool control devices. Their innate designs enable control circuits to be isolated from all kinds of circuiting, which allow flawless usage of grounded as well as ungrounded circuits, thus assuring greater safety to the operator. Moreover, their power transformers are RoHS compliant, Reach compliant, and are also available with CE and UL marks on request. So, have your power transformers customized as per your applications by Miracle Electronics, and have a safe power transmission.


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