Choosing The Ideal Core For Your SMPS Transformer – Miracle Electronics

 When you’re looking to transfer electrical power effectively while also providing galvanic isolation, an SMPS transformer proves to be the best choice that provides a clear barrier against dangerous high voltages from passing to the output. This is thus a safe and space-saving option, unlike other traditional linear kinds of transformers.

But when planning on having SMPS transformers manufactured for your application, you also need to be capable of making the right core choice. This choice is generally based on your power requirements, the frequency required, and the switching topology. Let’s help you know some basic considerations to make the right material, shape, and size selection.

Core material

It’s basically ferrite that is used for making the core of an SMPS transformer; the reason being that its frequency spectrum ranges between 20 kHz to 2 MHz, thanks to its reduce expense and minimal losses. But, ferrites should be employed in the saturating approach for low power and low frequency functioning. In the case of high power functionality, a tape-wrapped core used as the saturating core, with a ferrite core used as the output transformer, proves to be a better choice.

Core type

There are a variety of different core types you can choose from, some of the most popular ones stated below. Each core type has its own size and shape advantages. Let’s check them out.

EFD cores – EFD cores are economical flat design cores that offer excellent space utilization for transformers or inductors. They’re thus ideal for compact transformer and inductor applications.

EP cores – EP cores are circular center-post cubical designs that surround the coil thoroughly, with the exception of PCB terminals. This eliminates the influence of air flow crevices established at mating walls in the magnetic track, giving a more significant volume ratio to the absolute area used.

ETD and EER cores – ETD and EER cores are those with a round center-post and broad winding areas which offer the advantage of a short winding path length, and thus minimum winding resistance. They are absolutely good for high power designs and multiple output designs.

PQ cores – PQ cores have a maximum ratio of bulk to winding region and surface area. This results in comparatively fewer turns with a maximum winding area, lesser space consumed, and maximum inductance.

A perfect transformer is one that promises minimal core decline, while demanding the very least volume of room. The core loss is affected by the flux denseness and frequency. Having all of this considered is of utmost importance when selecting both the transformer and the core. This is why, when making your core choice, it is always advisable to work with an expert SPMS transformer manufacturer in India, one like MiracleElectronics. That’s because the expert engineers available here can help choose the most suitable material and dimensions for your particular project, so that your expenses are minimized, and profits maximized. Moreover, Miracle Electronics’ SMPS transformers are all RoHS and REACH compliant, thus assuring quality performance and minimal power wastage.