What Is a Pulse Transformer? (2024)

Pulse transformers are among the most important devices in the world of electrical engineering. They’re used everywhere, and you can find them in communications equipment like radios, televisions, and computers. They’re even found in medical devices such as pacemakers!

In this blog post, we’ll take a look at how pulse transformers work, how to size them, and what makes them so valuable.

What Is A Pulse Transformer and How Does it Work?

A pulse transformer is a device used in electrical power systems to isolate physically distant circuits or to change circuit characteristics such as voltage or current rating. They are a great solution for many industrial applications because they are compact, reliable, and can handle high-power pulses.

Pulse transformers are also built to transfer huge amounts of energy efficiently in a short amount of time. They have a wide pulse width and short rise time. Here are the main functions:

  • To convert voltage from one level to another
  • To provide isolation between input and output
  • To provide distributed power factor correction (PFC)

Their unique design is truly what makes them so valuable, as electrical isolation of two different circuits is their main purpose.

How Are Pulse Transformers Designed?

There are many parameters that need to be considered when designing a pulse transformer. For example, the size of the transformer is crucial to consider. The size of the transformer can affect both its cost and performance, so for engineers, and it’s essential to make sure they get it right.

Also important is the operating frequency of a pulse transformer. Engineers need to make sure that the design will work well within the required operating frequency range of the electrical system. Another factor they consider is impedance, which is determined by the amount of inductance in a circuit and how much current flows through it when there’s no voltage applied. And If you’re going to design a pulse transformer it will be helpful to know how to size the device. Here’s a quick guide to get you started:

How To Size Your Pulse Transformer

The usual procedure for sizing a pulse transformer is as follows:

  • Determine the full-load current, voltage, and approximate MVA.
  • Assume a standard %IZ for the transformer at the MVA determined in item 1(see illustration below) .
  • Calculate the combined impedances for the transformer and the power grid.
  • Determine the voltage drop for the combined impedances, and add it to the required full-load voltage determined in item 1 (see illustration below).
  • Recalculate the MVA rating of the transformer, using the no-load voltage of item 4 rather than the full-load voltage of item 1 (see illustration below).

What Is a Pulse Transformer? (1)

Still not sure how to size your device? We’re happy to assist! Give us a call at 832-400-4985.

When To Choose A Pulse Transformer?

The main difference between a pulse transformer and a normal transformer is that a pulse transformer has an inductance value that is very high compared to its resistance, which allows it to store energy for only a short period of time. The inductance value is usually 0.5 Henry or higher for most applications.

As a result, pulse transformers are used when there is a high current demand for a short duration. These types of applications include medical equipment like defibrillators and industrial equipment like welders and arc furnaces.

Depending on your needs, you could choose a pulse transformer, a regular transformer, or a custom pulse transformer. We always encourage custom solutions and suggest partnering with experienced engineers for the best result. A seasoned professional can create a design to meet your specific circuit requirement or help you expand on your circuit if needed.

Custom Pulse Transformer in Texas

With proficiency and experience, we innovate high-quality transformers to meet your specifications. We are a Houston-based manufacturer of custom pulse transformers, current transformers, and high-frequency current transformers and more.

When it comes to custom pulse transformers, we can create:

  • Customized dimensions and specifications
  • Frequency range up to 18 GHz
  • High-temperature operation up to +200°C (400°F)

Our custom pulse transformers can be used in a wide range of applications, from industrial automation to medical devices. They’re the best choice if you need to control the voltage and current of your system. If you need a solution now — reach out today at today 832-400-4984 or get a free quote! We have a team prepared to assist.

Check out our Custom Pulse Transformers

Order a pulse transformer that meets your voltage, size and frequency specifications.

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