A Variable Frequency Drive (VFD) is an advanced motor controller that adjusts the speed of an electric motor by varying the frequency and voltage of its power supply. By controlling how quickly a motor ramps up or down, VFDs improve performance, protect equipment, and save energy.

Customers choose VFDs to boost efficiency, reduce energy costs, lower system noise, extend equipment life, and better match motor speed to application demands. Modern drives also offer diagnostics and network capabilities to increase productivity and optimize system performance.

VFDs are commonly used in fans, pumps, and compressors—making up about 75% of drives used worldwide. Compared to simpler options like soft starters or across-the-line contactors, VFDs offer smarter, more flexible motor control for today’s industrial and commercial systems.

We deliver a complete motor control solution built for performance, reliability, and long-term value. Unlike large multinational brands that treat drives as a small piece of a massive product catalog, Phase Technologies is deeply focused on power electronics and how to flat out make them better using American engineering and manufacturing.

Every drive we ship is engineered and tested for the real-world demands of your application. From our proprietary AuxPower™ technology to our revolutionary voltage doubling capabilities, our products are packed with features that solve real problems—especially for single-phase and rural power challenges. We don’t just offer flexible drive systems; we design them to work seamlessly with your motor technology, environment, and goals.

Made in the USA

Industry’s Best Lead Times

Exclusive AuxPower™ Technology for powering accessories

Voltage Doubling Technology for flexible single-phase input

Expert Support Team