Industrial Drive Repair and Replacement

AC/DC Drive Repair Process:

To begin the repair on an AC/DC drive a visual inspection is performed.

• Next meters and signature analysis devices are used to component test.
• Common failure parts such as capacitors, drive and output transistors, power supplies, SCR’s, and firing circuits are checked first.
• Common failure parts are tested and replaced as necessary
• Drive is then powered up
• While powered up the power supplies are checked as are the outputs for proper wave form
• A dummy load is applied to the drive and the output waveform is checked with an oscilloscope
• If proper output is seen the dummy load is removed and the drive is fully load tested with the proper motor and with a dynamometer
• It is scoped again for proper wave form
• Entire unit is cleaned and retested