Induction motors drive the majority of rotating equipment used in industry, including pumps, fans, and compressors. These motors require periodic testing and analysis to:

• Avoid unexpected failure/ system downtime
• Trend performance and plan maintenance
• Maximize efficiency

Recent improvements in motor testing equipment and analytical software have enhanced the ability to quickly analyze and find solutions to motor problems. Testing can usually be performed while the equipment is operating. A diagnostic specialist will visit your site, review the motor operating and maintenance history, and perform specialized testing such as:

Rotor Condition Assessment

• Frequency analysis of motor current
• Detection of broken rotor bars
• Shorted or open rotor laminations
• Condition of end-rings
• Porosity in aluminum cast rotors

Stator Condition Assessment

• Air gap symmetry
• Voltage phase balance
• Magnetic flux symmetry
• Electrical connections

Vibration Spectrum Analysis

• Root cause analysis by frequency content
• Assessment of overall and peak values
• Analysis of vibration signatures
• Condition of bearings
• Evaluation of mounting foundation

Deliverables

A summary report will include historical background, testing methods, data collected, conclusions, and recommendations.