Energy Saving AC Drives

Variable Frequency Drives

AC Drives, also known as VFD’s, Variable Frequency Drives, Speed Control have been one of the primary ways that major industrials, commercial buildings, and facilities save energy. White papers discuss energy savings in detail below. To control pump speeds, fan speeds or for machine speed control, engineers use AC Drives to change motor speeds by converting the frequency from the input power source into the optimum frequency the motor needs to run at the exact speed desired. By running at optimum speed – major energy loss producing dampers, gears, etc. are eliminated producing tighter motor speed control, as well as significant energy savings

Download VFD's Overview

5 Steps to Choose an Energy Saving AC Drive


Determine Your Motor Horsepower


Evaluate Your Input Voltage

  • If 120 volts – it single phase – choose DA1
  • If it is 230/240 Volts – is it Single phase – choose DA1 or DC1
  • If it is 3 phase – see next question

Understand Your Application

  • Is the application Constant Torque (ex. Conveyor belt, machines)?
  • Is the application Variable Torque (Pump, Fan applications)?
  • Is the application for the HVAC industry (typical Pump, Fans for buildings)?

Choose the Right AC Drive

  • Use the chart below to find the right product family based on the features you need.
See Chart

Confirm Motor Full Load Amps

  • Is it within the drives frame size?

How does having an AC Drive save me money?

Saving energy is more than the right thing to do Energy costs continue to increase. At the same time, there is increased pressure to reduce utility bills without sacrificing operations or comfort. For over 40 years, variable frequency drives (VFDs) have been a critical component of commercial and industrial systems’ efforts to improve energy efficiency. Today, their fundamental usage has remained the same, while technology has evolved and improved—yielding drives that are better able than ever to reduce energy consumption and improve reliability while extending equipment life. See below (pdf’s) for more details on how AC Drives save you money.

White Papers

Featured Energy Saving Drives

DC1 Drives

  • 115 VAC: 1 ph In & out; ½ – ¾ hp
  • 115 VAC: 1 ph in, 3 out; ½ - 1 ½ hp
  • 230VAC: 1 ph In & out; ½ - 1 ½ hp
  • 230 VAC: 1 ph in, 3 out; ½ - 3 hp
  • 480 VAC: 3 phase; 1 – 30 hp
  • Fast commissioning
  • Compact size
  • Modbus communication
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DA1 Drives

  • 230 VAC: 1 ph in, 3 out; 1 - 3 hp
  • 230 VAC: 1 ph in, 3 out; 1 - 5 hp
  • 480 VAC: 3 phase; 1 – 15 hp
  • Communications available: Ethernet IP, CANOpen, Profibus, Modbus, and many others
  • Advanced Features
  • Perm Magnet Motors
  • Closed Loop
  • Safe Torque Off
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DG1 Drives

  • 230 VAC: 0 – 125 hp
  • 480 VAC: 0 – 1,000 hp
  • 575 VAC: 0 – 800 hp
  • Communications capability: Ethernet IP, is included. also available: CANOpen, Profibus, Modbus, and many others
  • Advanced Features
  • Active Energy Mgt
  • DC Link Choke
  • EMC filter
  • Active Energy Management (patented)
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HMax Drives

  • 208/230 VAC: ¾ - 125 hp
  • 480 VAC: 1 – 250 HP
  • Available as Open Drive or enclosed with a main disconnect
  • Easy to use start up menu designed for HVAC industry
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Drives Training

Become an Eaton VFD Aficionado

Eaton's goal with this program is to enhance your product competency, troubleshooting skills, and safe operation of Eaton Drives and Soft Starters through self-guided, eLearning and instructor led training.

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