Toroidal Transformers Working Principle

We are inseparable from various household appliances in our daily life, but we may not know that almost all appliances require transformers. Many people don’t understand the step up & down transformer, what role it plays in electrical appliances, and what functions it has. In this article, we will introduce the principle knowledge of toroidal transformers and take you into a field that you don’t understand.

How does a toroidal transformer work?

The core of the toroidal transformer is made of high-quality cold-rolled silicon steel sheets (generally below 0.35mm in thickness), which are seamlessly rolled, which makes its core performance better than the traditional laminated core. The coil of the ATO toroidal transformer is evenly wound on the iron core, and the direction of the magnetic field lines generated by the coil almost completely coincides with the magnetic circuit of the iron core. Compared with the laminated type, the excitation energy and iron core loss will be reduced by 25%. The toroidal core is wound with silicon steel tape, which has a continuous magnetic circuit, while the laminated core transformer has an air gap between the EI sheets. Therefore, the existence of large air-gap reluctance is the main disadvantage of laminated transformers. The toroidal core has no air gap, and the electrical noise is much smaller than that of the EI-type and C-type iron core transformers. The use of vacuum impregnation technology can make the iron core a solid whole, and it will not deform during winding and processing. Since the toroidal core is very strong, vibration and audible noise are reduced.

There are many fixing methods for toroidal transformers, the most common method is to use the central hole of the toroidal transformer to fix. It should be noted that fasteners such as screws should not ground the top plate of the transformer and the bottom plate at the same time, so as to avoid forming a short circuit.

Toroidal Transformer Mounting Methods

The transformer can change the secondary voltage by changing the number of turns of the secondary coil as needed, but cannot change the power that the load is allowed to dissipate. This knowledge is something we didn’t know before. Understanding the working principle of the toroidal transformer, it can help us to simply deal with some electrical faults in our daily life and understand the correct use of different transformers. It can troubleshoot problems in time, find solutions quickly, and ensure the normal operation of the equipment.

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