Who we are

Phase Technologies is a power electronics manufacturer located in Rapid City, South Dakota. Founded in 1999, Phase Technologies developed the world’s first digital phase converter, called the Phase Perfect® Digital Phase Converter. This was the first major advancement of phase conversion technology in decades. Recognized as the world’s leading manufacturer of phase converter technologies, the company expanded the technology into variable frequency drives (VFDs) in the irrigation, water pumping, HVAC and oil & gas industries.

Specializing in VFDs with Active Front End technology, Phase Technologies produces the only low harmonic, fully regenerative, phase-converting VFD that complies with IEEE 519, the international standard for allowable harmonic levels on utility mains. The company has an extensive product line-up of low harmonic, fully regenerative drives in both three-phase and phase-converting models.

Our story

Phase Technologies relies on a team of in-house power electronics and mechanical design engineers to develop innovative products, encompassing all aspects of hardware and firmware design. All products are manufactured at our facilities in the USA under exacting quality standards. In-house processes include printed circuit board population, wire assemblies, and our own proprietary magnetics fabrication. The company operates a certified UL 508A panel shop to integrate our drives into rugged outdoor panels with custom options for applications including irrigation, oil and gas production, and general industrial control. The custom integrations are part of the manufacturing process, not an afterthought.

Integrity and honesty are the cornerstones of customer interaction at Phase Technologies. Knowledgeable sales experts are available to help customers select the right product to fit their needs, and we partner with the best distributors and dealers to make our products available with industry best lead times and local service. Typical manufacturing lead time is 3-7 business days. Experts in our customer service department are standing by to answer any technical questions and provide the support to keep your application up and running.

Company history

Focused on continued innovation – Intuitively Engineered

For over two decades, Phase Technologies’ product development efforts have been founded on the notion:

UNCOMMON VALUE - Be more than our customers expect.

We relentlessly seek to provide uncommon value, solutions, innovation, and support for the industries we serve.

Phase Technologies products

Phase Perfect®

Three-phase power anywhere, truly modern phase conversion
SD Series

2-10HP, phase converting VFD
2XD Series

5-7.5HP, phase converting & voltage doubling VFD
1LH Series

20-125HP, low harmonic, regenerative VFD, single-phase input
3LH Series

20-650HP, low harmonic, regenerative VFD, three-phase input
DX Series

200-500HP, six-pulse VFD, three-phase input
ES Series

1/3HP-2HP, 120V / 240V, 2 & 3 Wire, single-phase VFD
Phase Connect

Remote monitoring and control from any internet-connected device.