What are variable frequency drives? What are AC motors?

Variable frequency drives (VFDs), or ac drives, are designed to reduce energy usage by controlling the speed of the motor and can offer cost-effective benefits for plants. AC motors convert electrical energy into mechanical rotating or linear energy to operate industrial equipment.
Motors, Drives December 13, 2016

Why online motor testing is a great PdM tool

Although offline or static testing is an important part of a routine maintenance program, dynamic testing of motors can be done more frequently and, in many cases, with greater benefit.

By David Manney, L&S Electric
System Integration December 5, 2016

VFD efficiency: Three best practices

The use of variable frequency drives (VFDs) has many benefits including improved process control, energy savings, higher reliability and reduced wear and tear.

By Gary Jacott, Motion Industries
System Integration December 2, 2016

Considerations for using VFDs with standard motors

End users desire speed and/or torque control procure and install VFDs to modify existing applications where a standard-induction motor is in place. There are a few areas of concern involving misapplication of a standard induction motor.

By Mike Howell, EASA Technical Support Specialist
System Integration October 19, 2016

VFDs offer cost-effective benefits for plants

Variable frequency drives (VFDs) are designed to reduce energy usage by controlling the speed of the motor and can offer cost-effective benefits for plants.

By David Manney, L&S Electric
System Integration October 7, 2016

Prevent shaft current from causing motor damage

Awareness and testing for potential shaft current on motors can help companies experience fewer problems with downtime and equipment failure.

By David Manney, L&S Electric
System Integration October 2, 2015

Using medium-voltage VFDs for better pump process control

How product innovations are revolutionizing pump monitoring and process control management.

By Rob Lax
System Integration June 4, 2015

VFD trends and solutions for drive systems

Harmonics mitigation, filtering voltage spikes are two key issues.

By Alex Ward, REO-USA
Motors, Drives March 4, 2015

A systematic approach to ac motor repair

ANSI/EASA AR100 provides best practices for mechanical repair, electrical repair including rewinding, and testing that help apparatus rebuilders maintain or enhance the performance, reliability, and energy efficiency of ac and dc motors and generators.

By Tom Bishop, PE, Electrical Apparatus Service Association
Motors, Drives October 22, 2013

Motor base support and alignment

A basic understanding of frame construction can help minimize motor vibration.

By Chuck Young
Motors, Drives November 10, 2012

Avoid over-specifying inverter-duty motors

When combining a motor and inverter, the application should tell you what type of motor fits best. If you follow these guidelines, you can avoid more than is necessary.

By John Malinowski