• Automotive

    The Power To Transform™

    In over 40 countries around the world

Welcome to RoMan

RoMan is an industry-leading manufacturer of AC water-cooled transformers and DC Power Supplies and related specialty products used in resistance welding; melting, boosting, refining and forming of glass; and vacuum and atmospheric furnace applications.

As a manufacturer of high-current, low-voltage power sources, we use the finest materials available to offer thousands of design and customized options built to the highest quality standards and to your specific industry and application requirements. And all of our products are backed-up by a unique and industry leading warranty on all of our equipment.

To download the warranty information please click here>>>

We also provide you value-added, application-centric technical support and industry specific application engineering services.

Our products and services have made us the choice of hundreds of companies throughout the world.

Company Knowledge
MFDC Lightweight 2

Additional Resources

View Articles, Blog Posts, Case Studies, and Whitepapers

Blog Post

With the need to produce lighter weight vehicles, the switch from conventional steel applications to aluminum is beginning to take hold in the automotive industry. While Resistance Spot Welding (RSW) of aluminum is nothing new to the auto industry, until now it has been used in lower production rate vehicles or batch build closure applications. To meet the demand of CAFÉ standards, there is need to use it on high production lines.

Blog Post

As the cost of electrical energy continues to rise, manufacturers are looking for ways to reduce power consumption—energy lost in transmission. In this Energy Savings study, we assess how to do that.

Blog Post

Mark Siehling, RoMan’s Vice President of Engineering, discusses the best means to protect resistance welding (RW) transformers and medium frequency direct current (MFDC) transformer rectifiers from failure due to over-temperature.