Category Archive: Transformers

What is a Toroidal Power Transformer?

Transformers are electrical devices that rely on electromagnetic induction to transfer energy from one circuit to another. Among the most common types of transformers are power transformers, which are generally used in electrical systems to step up (i.e., increase) or step down (i.e., decrease) voltage levels between circuits. These transformers are available in several variations, each of which offers different performance characteristics. 

The following article focuses on toroidal power transformers, including outlining what they are, what advantages they offer, what industrial applications in which they are used, and how they differ from standard transformers. 

What Is a Toroidal Transformer?

Similar to other transformers, a toroidal transformer operates under the principles of electromagnetic induction. It features a toroidal core surrounded by the primary and secondary windings. As current flows through the primary windings, it produces an electromagnetic force (EMF) that generates current in the secondary windings; this process allows power to be transferred from the primary coil to the secondary coil. 

Advantages of Toroidal Power Transformers

Compared to other types of power transformers, toroidal power transformers offer a number of advantages, such as:

  • Greater efficiency. The unique shape of these transformers accommodates the use of shorter coils, which allows for lower loss levels and, consequently, higher efficiency in the system.
  • Lower operating temperatures. As toroidal transformers are more efficient than other power transformers, they produce less heat during operations, which translates to lower operating temperatures. This quality, in turn, reduces the need for cooling devices. 
  • Smaller footprint. The coils in toroidal transformers can touch and overlap without interfering with performance, which allows these transformers to be more compact than conventional power transformers. 
  • Quieter operation. These transformers produce less mechanical hum than EI transformers. 
  • Better protection against EMI. The primary and secondary coils covering the core act as a shield against the magnetic field produced, which protects nearby sensitive electronic equipment from being affected by the transformer during operations. 

Applications of Toroidal Power Transformers

Toroidal power transformers find application in a wide range of industries, including: 

  • Aerospace
  • Audio/visual equipment
  • Automotive
  • Consumer goods
  • Lighting
  • Medical 
  • Military and defense
  • Power generation and distribution
  • Renewable energy
  • Security
  • Telecommunications

Due to their compact size, they are often used in electronic devices and systems such as computers. Their quiet operation makes them well-suited for use in amplifiers, audio equipment, televisions, and other audio/visual systems. These qualities, combined with their high efficiency and reliability, are among some of the reasons why they are regularly used in medical equipment. 

Toroidal Transformers vs. Conventional Transformers

The main difference between toroidal transformers and conventional transformers is the core. 

  • Toroidal transformers have a donut-shaped core that is surrounded by the primary and secondary windings. This design allows for a more efficient transfer of power and more compact construction. Some of the other advantages these transformers have over conventional transformers include quieter operation and greater construction flexibility.
  • Conventional transformers—also knowns as EI transformers—have a core consisting of E-shape steel sheets and I-shaped caps. Compared to toroidal transformers, they come at a much lower price point. 

Contact the Transformer Experts at MPS Industries Today

MPS Industries is an ISO 9001:2015 and TS 16949 certified manufacturer of standard and custom transformers. We offer toroidal transformers that accommodate between 50 to 30,000 VAC power and operating temperatures up to 70° C. Our products are made in the USA and comply with the following standards: RoHS, REACH, CE, CSA, UL, and ETL. To find out more about our toroidal transformers or other electronic products, contact us today.

 

Exploring Balun Transformers

In the world of electronics, it’s common to hear about two varieties of lines—balanced and unbalanced. Balanced lines have two conductors, which feature equal currents running in opposite directions. An example of balanced lines is twisted pair cables. On the other hand, unbalanced lines feature just one conductor and a ground, like a coaxial cable.

Baluns are two-port components that are placed between a source and a load. They serve to join balanced lines to unbalanced lines. The term “balun” is derived by combining the words “balanced” and “unbalanced.” Baluns are a specific variety of transformer used to convert unbalanced signals into balanced ones (or vice versa). They often isolate a transmission line and provide a balanced output.

Why Balun Transformers?

While there has been recent emphasis on the importance of balun transformers, they aren’t a new development. Baluns have been utilized as a mean of resolving the single-ended/balanced dilemma since the early days of wireless telephony. However, recent expansion in the realm of portable, handheld, and IoT applications has created exceptional demand for small, low-power baluns.
Baluns are often viewed as a passive component and can sometimes be “glossed over” in RF discussions because they do not add obvious value to the RF signal chain. Despite this, baluns have numerous typical applications. They are a critical part of numerous electronic devices that the public relies on daily. Some of these include:

• TVs
• Antennas
• Microwaves
• Cable moderns
• Coax Alliance applications

Recent years have seen an increased use of differential configurations when it comes to RF ICs. Their internal topology allows for improved noise immunity and heightened RF performance at a low-cost increment. The nature of IC designs affords manufacturers the capability to create products with improved capabilities that cost less than their predecessors.

The MPS Difference

MPS-brand balun transformers are known for their exceptional impedance transformation. As with all baluns, they convert unbalanced impedance to balanced impedance and vice versa.

Our balun transformers feature a low profile, making them ideal for specialized applications where larger components may prove difficult. Their compact footprint and high performance translate to tiny powerhouses with exceptional capabilities; they offer higher performance than traditional lumped-element and ceramic baluns.

In addition, our balun transformers meet regulatory requirements and are RoHS compliant. We serve clients in a wide variety of industries, and our baluns are ideal for use in CATV, multimedia applications, wireless infrastructure, and other consumer electronics applications.

Does Your Application Require a Balun Transformer?

At MPS Industries, we’re proud to offer our clients a variety of balun transformers that have been specifically designed to meet the needs of virtually any application. We also offer a myriad of magnetic components intended for use across numerous industries.

Our team has years of experience in manufacturing electronic components, and our clients consistently return to us because of our broad product line, custom design capabilities, and quality services. Our in-house engineering group is always available for local support and we’re committed to providing products that exceed customer expectations.

Interested in learning more about MPS Industries’ balun transformers? Get in touch with us today or request a quote to speak to one of our team members about integrating balun transformers into your next design.

Understanding Power Transformers

Transformers convert an AC system’s electrical power at one current or voltage into electrical power at a different current or voltage without using rotating parts. power transformers provide this critical function as components of electrical and electronic circuits. Besides the common application of stepping voltages up
or down, these magnetic components can also be used to provide isolation for impedance mismatch and other applications.

How Power Transformers Work

Understanding how power transformers work is key to understanding what transformers do. Transformers use magnetic coupling to transfer electrical power between AC circuits—they do not create their own electrical power. The transformer’s core offers a controlled path for the magnetic flux the transformer generates due to the current flowing across the coils.

A basic transformer’s primary components include the input and output connections, the coils, and the core.

Input and Output Connections

A transformer’s input side is known as the primary side as the primary electrical power which needs to be changed is connected on this side. The output side is commonly referred to as the power transformer’s secondary side. On this side, electrical power is transferred to the load. This incoming transferred electric power may be either decreased or increased depending on the load’s requirement.

Winding

(more…)