As one of the world’s leading providers of industrial electrical technology, WEG is a supplier of diverse industrial electrical solutions.

Control Concepts services all WEG drives and soft starters! Contact us today.

WEG soft starters are designed to protect your machinery by controlling motor torque during motor start-up, which reduces the risk of damage and machinery failure.

What are WEG Variable Frequency Drives?

WEG Drives are designed to improve the performance and energy efficiency of different industrial automation systems.

Drive Types

  • OEM Drives – WEG provides a wide selection of VFDs designed for use in OEM application. These drives are high performing, cost-effective, and adaptable solutions.
  • General Purpose Drives – WEG general purpose drives are designed for use in situations that do not require custom engineering. These drives have simple programming and are easy to set up and operate.
  • HVAC Drives – WEG offers several VFDs designed for HVAC-R systems. These drives are reliable and energy efficient.
  • Drives for Decentralized Solutions – WEG offers VFDs designed for decentralized systems. These drives can be freely configured and adapted to a variety of applications.

Common Drive Failures

  • Software or programming problems
  • Non-functional cooling fans
  • Loose connections
  • Drive keeps blowing fuses or tripping breakers
  • Drive doesn’t run motor
  • Circuit board failure

Circuit board failure is the least common reason for drive failures. The most common fault that shuts down a drive is an over-current fault, of which there are 20-30 causes. We start with the dynamics of the motor and move on from there.

The Control Concepts Repair Process

We check the motor drive and terminals for substandard connections which can be caused by anything from heat cycles and mechanical vibration to reusing or over-tightening torque screws.

We conduct diode and IGBT tests on the input/output power sections before applying power to the drive unit. This is to protect against further damage from a short.

We power up the unit and perform amp readings and output frequency tests, slowly increasing the voltage until the rated input voltage of the drive is reached.

If everything functions properly, we use the drive to run a motor through basic jog functions after backing up existing programs. If the motor does not run, we check the output voltages and current ratings going to the motor to check drive function for motor rotation.

Most drive failures can be avoided through preventative maintenance.

  • Keep the drive free of dust
  • Ensure proper ventilation to prevent overheating
  • Keep everything dry and protected from moisture

Call us for more information or to schedule service.