Author: Doris Chan

Inductors and transformers are electromagnetic induction components that are wound with insulated wires and are also commonly used in electronic circuits. In spite of the fact that they look similar, they actually function differently.

What are the causes of transformer noise?The sound power of any mechanical vibration is determined by the rate at which the noise source radiates energy. Flow rate must be described in terms of direction, so sound intensity is a vector, whereas sound pressure is a scalar, with only magnitude and no direction. Most transformer noise measurements can be done with ordinary microphones, which measure sound pressure only.

Transformers with ferrite cores are used to produce variable frequency transformers with operating frequencies above 10kHz. Laminated steel transformer is used for the production of power frequency transformers with an operating frequency of 50Hz*400Hz.

“The digitalization and sustainability of grid equipment are driving the global transformer market,” said Neha Tatikota, Industry Analyst, Energy & Environment, Frost & Sullivan.There will be an increase in demand for digital power and distribution transformers as a result of the former. Meanwhile, green transformers will be in demand due to their reduced carbon footprint and improved safety.

Inductor components are commonly used and some of their basic parameters may be overlooked, resulting in insufficient designs and serious product problems. The following introduces

Industrial and mining enterprises as well as civil buildings use oil-immersed transformers to convert network voltages of 10(6)kV or 35kV to busbar voltages of 230/400V. Suitable for AC 50/60Hz, three-phase maximum rated capacity of 2500kVA, can be used indoors, and can be installed on a pole when the capacity is 315kVA and below, and the ambient temperature is not higher than 40°C, not lower than -25°C, the relative humidity is not greater than 90% (ambient temperature is 25°C), and the altitude is not higher than 1000m.

Standard transformers (including non-isolated transformers) are designed to change voltage, which can be divided into step-down transformers and step-up transformers, with different numbers of turns in the primary and secondary coils. In some transformers, such as auto transformers, the primary and secondary sides are not isolated.

There are two ways to judge the fault of the transformer: intuitive judgment and analysis judgment. The fault analysis and judgment of transformers are mainly judged by the damage to the iron core as well as the short circuit between turns of the winding of the transformer.

Transformers with ferrite cores are non-conductive, ferromagnetic compounds with ferrite windings. Low coercivity and low eddy current losses make them ideal for high frequency applications.
Ferrite core transformers provide consistent performance under a variety of conditions, which is why they are so widely used in the electrical industry.