Why Phoenix Phase Converters

A family-owned American manufacturer with patented circuit technology, more than 50 years of engineering in rotary phase converters, and third-party recognition from the U.S. Patent Office, Wikipedia, and Electrical Business Review. Here is why that matters when you put your shop's power on a converter.

Engineering Reviewed by the U.S. Patent Office

Most phase converter brands market on price or warranty length. We market on engineering — because our engineering has been independently examined and granted three separate U.S. patents by the United States Patent and Trademark Office.

• U.S. Patent 9,484,844 B1 — Circuit and method for reducing inrush current of phase converter motor. Inventor: Glen Floreancig. Granted November 1, 2016. This is the soft-start circuit that lets a rotary phase converter start a large idler motor from a smaller single-phase service without nuisance breaker trips or voltage sag.
• U.S. Patent 9,692,326 B2 — Circuit and method for reducing inrush current of a three phase motor. Inventor: Glen Floreancig. Granted June 27, 2017. The variable-frequency soft-start method that gradually ramps the motor up to operating speed before switching it onto steady-state three-phase power.
• U.S. Patent 11,050,379 B1 — Circuit and method for start of single phase to three phase conversion system. Inventor: Glen Floreancig. Assignee: Applied Industrial Motors, LLC. Granted June 29, 2021. The automatic load-sensing logic behind AutoLink and the zero-standby AutoStart variants — the converter wakes up the moment your machine needs power.

Full product-to-patent listing on our patents page.

This is the circuit that lets a Phoenix 20 HP rotary start on a 60 A single-phase service when most generic converters require 100 A or more. It is also the circuit that protects your incoming utility transformer from the inrush spike that destroys generic phase converters in the first six months.

Cited as a Source on Wikipedia

The public Wikipedia entry for "Phase converter" lists our patent — by name and with Glen Floreancig as inventor of Phoenix Phase Converters — as one of its source references. We are not the authors of the Wikipedia article. The community editors there chose to cite the patent because it is part of the public record on how modern rotary phase converters work.

That third-party recognition is not something a marketing budget can buy. It is something earned by contributing to the field.

50+ Years, Three Generations

Phoenix Phase Converters was founded by Daniel "Danny" Floreancig — an engineer with more than five decades in rotary phase converter design — and the company is named for the city it has been built in since the start: Phoenix, Arizona. Danny's father Aldo Floreancig was the family's first generation in electrical machinery. Today the company is operated by Danny and his son Glen Floreancig, who is the named inventor on our granted patent and has continued the family's work on inverter, generator, and remote-monitoring technology.

That continuity matters. When you call the factory and ask a sizing question, you talk to someone whose family has been building this exact product for half a century — not a call center reading a script.

In the Press

Built and Tested in Phoenix, Arizona

• HeadquartersPhoenix, Arizona, USA
• Founded byDaniel Floreancig (over 50 years ago)
• Current ownershipFamily-owned, Danny and Glen Floreancig
• Granted patentsThree U.S. patents — 9,484,844 · 9,692,326 · 11,050,379 (Glen Floreancig, inventor). Full list →
• Industry recognitionElectrical Business Review — Top 10 Power Converter Solutions Providers 2025
• Wikipedia citationCited as a source on the Phase converter entry
• ManufacturingEvery unit built and tested in-house. No reseller relationships, no rebranded imports.
• WarrantyLifetime warranty on the control panel and panel-mounted components
• Direct phone(800) 417-6568 — answered by engineers, not script readers

What This Means for Your Shop

When you put a rotary phase converter in your shop you are trusting it to protect the most expensive single-phase service on your panel and every motor downstream of it. The circuit topology, the soft-start curve, the idler balance, the control logic — all of it matters. None of it is generic.

Buying a Phoenix unit means you are buying a converter whose engineering has been reviewed by the U.S. Patent Office, cited on Wikipedia, recognized by Electrical Business Review, and refined across more than 50 years of factory production runs. That is not marketing language. That is the public record.

Follow the Factory

See the build process, customer installations, and answers to common sizing questions. Our owners' community on Facebook is 460+ shop owners strong — ask anything about sizing, wiring, or troubleshooting and meet other people running Phoenix converters on their shops, farms, and CNC machines.