Motor Testing, Analysis & Overhauling

Motor testing assesses the integrity of a motor through the use of computer-supported equipment or tools that monitor trends within the motor. The main objective of motor testing is to reveal hidden problems and prevent unnecessary failure. Specific to electric motors, motor testing evaluates static parameters like insulation, wire damage and electrical current leakage, as well as more dynamic parameters such as distortion, temperature fluctuations and balance.

There are numerous motor testing techniques when it comes to electrical motor testing. Most of these fall under one of two categories: online or offline testing. Power Electronical Offers various tests considering both the categories as mentioned further considering the best reliable testing and analysis results.

Online dynamic testing is done while the motor is running. It gives technicians data on the power quality and operating condition of the motor. Dynamic testing equipment are be able to collect and trend all data essential to electric motors. This includes power condition, voltage level, voltage imbalance and harmonic distortions, current levels and imbalances, load levels, torque and rotor bar signatures, etc. Analyzing the collected data from online testing can reveal problems through indicators such as power condition, motor condition and performance, load assessment, and operating efficiency. Power Electronical conducts and provides its customers with following data, and with our expertise the best condition assessments.

  • Partial Discharge Measurement
  • Electrical Signature Analysis (ESA)
  • Vibration Spectrum Analysis
  • Current Spectrum Analysis
  • Thermography

Offline static testing should be used on a regular basis to determine how the components within a motor (windings, rotor bar, etc.) are functioning as well as to perform a current and voltage analysis. Static testing finds problems like broken or loose rotor bars, issues with end rings, an unequal air gap between the rotor and stator (eccentricity), and misalignment. As the name suggests, this type of motor testing is done when the machine is stopped. Static testing assesses things like resistance/insulation resistance, high-potential (HiPot) tests, polarization, surge tests and more. Power Electronical conducts and provides its customers with following data, and with our expertise the best condition assessments.

  • Capacitance And Tan Delta Test
  • Dielectric Discharge Test
  • Partial Discharge Test
  • I.R./P.I. Measurement
  • HV DC Test
  • RTD – Resistance And IR check
  • Thermostat Resistance
  • Diode Check
  • Surge Comparison Test
  • Motor Circuit Analysis ( MCA )
  • Microscopic / Visual Inspection
  • Stator & Rotor Winding Resistance
  • Recurrent Surge Oscilloscope ( RSO )
  • Rotor Winding Impedance
  • Rotor Pole Drop Test
  • Exciter/ PMG Tests

Dry Ice Cleaning/CO2 Cleaning

Environmental condition such as dirt, dust and product can build up on windings and lamination vent ducts trapping heat and obstructing ventilation, preventing needed cooling air from reaching the windings and deteriorating the insulation system. Carbon residue in D.C. motors can create flashovers that bring production to a halt. Loss of revenue due to downtime and the costs of motor repairs associated with catastrophic failures can become a major obstacle.

Dry ice cleaning (CO2 cleaning) has become the preferred method for removing these contaminates, on site, from the windings of large motors and generators that are too costly to remove from service for cleaning. Motor repair shops also utilize in shop dry ice cleaning to eliminate oven drying time and minimize the turn around time in critical applications where no spare motor is available. The process is also effective on removing contaminates from clogged fan guards and cooling fins of totally enclosed motors.

With our experience and expertise in cleaning rotating electrical equipment, we provide best solutions to prevent such damages to machines. We are not just limited to cleaning but also the restoration of the moto or generator which includes applying right combinations of varnishes, resins and drying at appropriate temperatures.