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Should you consider a DC to AC Drive & Motor Conversion?

A DC to AC motor conversion can save you thousands of dollars in energy costs, a reduction in operating costs, and a reduction in maintenance costs.  Alternating-
current (AC) and direct-current (DC) motors have traditionally been used in very different applications because of basic operating characteristics, but technology improvements are changing how we think about their applications. 

The advantages of an AC motor are:AC_motor_1.png

  • Smaller
  • Less expensive
  • Lower power demand at start
  • More durable
  • Controlled starting current

The advantage of a DC motor are:

  • Precise speed control
  • High starting torque
  • Quick starting, stopping, reversing and acceleration
  • Very reliable

For years, DC motors have been the industry standard for applications using variable-speed operation.  They are most often used for electric traction, cranes, elevators, air compressors and lathes. However, the reliability of DC motors for providing  precise speed control under variable operating conditions is hampered by their purchase price and the high cost of maintenance.

Vast improvement of AC drives' speed control has made them much more precise, making them nearly equivalent to servo drives. The cost of an AC motor and drive together is comparable to the cost a DC motor by itself.  Because of the newer technology, AC drives are moving into applications that were once dominated by DC drives.

The advantages you will see when converting to AC variable speed control are:

  • Process only uses the energy it requires
  • Big reduction in heat loss
  • Speed is electronically controlled
  • Soft starts and stops
  • Space savings
  • Noise reduction
  • Increased efficiency 

When converting from DC technology to AC you can expect to save 20-30%  in energy consumption. The conversion not only changes the active motors to AC but also the controlling variable speed drives.

IER Services can provide a free consultation to show you the benefits and savings you could reap with the installation of a new AC Variable Speed Drive.   

We are an authorized distributor for a wide range of electric motors from manufacturers like WEG motors and  Baldor.  Our trained professionals will install your motor, and perform scheduled maintenance to be sure that it runs in top shape.

When it comes to the tools of your trade, you demand quality, value and availability. IER Services is proud to be able to deliver a high level of customer service along with a wide selection of motors for many applications. 

Contact Us Now!


 IER Services, the Central Ohio leader in electric motor sales and repairs!

Topics: DC motors, DC to AC motor conversion, AC motors

IER Services

Written by IER Services