Get a practical guide to measuring three-phase motor drives with an oscilloscope. Learn setup tips, key measurements, and analysis techniques for PWM signals, power, speed, torque, efficiency, and overall system behavior.
Nov. 11, 2026
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This primer describes methods for making measurements using inverter, motor and drive analysis software on oscilloscopes to provide stable, accurate electrical measurements on the inputs, DC buses, and outputs of variable frequency drives, as well as mechanical measurements on the motor.
In this primer you will learn:
Basic variable frequency drive structure
Fundamentals of pulse width modulation (PWM)
How to select and set up oscilloscope probes
Selecting the proper wiring configuration
How to make measurements on variable frequency drives
Electrical measurements
Input Measurements
DC Bus Measurements
Output Measurements
DQ0 Measurements
Mechanical Measurements
Speed, Direction and Acceleration
Torque
Mechanical Power
System Efficiency
Get this practical reference to help you set up your oscilloscope with confidence, capture stable and accurate measurements, and gain deeper insight into the performance and efficiency of your motor drive system.
