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Lower Your Operating Costs with Variable Frequency Drives


Saving with VFDs from Control Engineering

Variable frequency drives (VFD) are reliable electronic devices that control three-phase electric motor speed. They are used in building automation, industrial, pumping, agricultural, irrigation, and water/wastewater applications to control the speed of fans and pumps in various systems. The payback period for installing drives is usually less than three years and can be less than a year.

Drives do more than reduce energy cost:

  • Drives reduce fan noise and duct rumble, thus reducing tenant complaints.
  • Drives reduce amps during motor starting, lowering demand charges; another significant part of the electric bill.
  • Drives are less expensive to maintain than mechanical controls.
  • Drives inherent soft-starting reduces wear and tear on motors, sheaves, belts, couplings and other system components.
  • Drives provide accurate and repeatable control of HVAC settings, eliminating frequent readjustments.

Financial Incentives and Rebates
Some utilities offer rebates for installing our drives in new or retrofit work. Upgrading with VFDs is a major part of the Environmental Protection Agency’s effort to improve energy efficiency. In addition to making good business sense, installing drives demonstrates corporate environmental consciousness. The Database of State Incentives for Renewables & Efficiency (DSIRE) is one resource that offers comprehensive information on state, local, utility, and federal incentives that promote renewable energy and energy efficiency.

State Energy Program Opportunities for Industry
Several states have been awarded ARRA funding for the implementation of State Energy Programs that help promote energy efficiency and clean energy deployment, as well as to support local economic recovery. State Energy Program (SEP) funds will be awarded in phases, with each awarded state initially receiving 40% of the total authorized funds. Some states have included funding opportunities for local industry in their State Energy Plans.

Energy Savings Predictor (ESP) Software with Carbon Footprint Calculation
Building Operating Management 2013 Top Products Award Controlling your applications with our drives can save you energy and reduce your operating cost. To complete your energy estimation all you need is your customer information, utility information, and systems specifics to calculate energy savings and carbon emissions for single or multiple systems. View System Requirements

Energy Savings Worksheet
This worksheet helps you calculate the energy savings for centrifugal fans and pumps. Compare VFD performance to other methods of volume control (based on motor output or horsepower). All you need are motor horsepower, the cost per kWh of electricity, total hours of operation per year, and the alternative to VFD control (inlet guide vane, outlet damper, ride the fan curve, discharge valve, bypass damper, bypass valve or no control).