I am benchmarking the noise and vibration performance of several electric vehicles with induction motors and I would like some way to objectively quantify some characteristics of the PMW control strategies utilize in each vehicle. Do you have any suggestions about how I could at least measure the duty cycle and carrier frequency with Testlab ?
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Using the time signal calculator in Testlab you can quantify the duty cycle and carrier frequency of a PMW control signal.
A pulse width modulation (PWM) signal consists of three main components that define its behavior: pulse width, carrier frequency and duty cycle.
The pulse width describes the amount time the digital output signal is on
The carrier frequency determines how fast the PWM completes a cycle (i.e. how fast it turns on and off)
The duty cycle describes the amount of time the signal is in an on state as a percentage of the total time of it takes to complete one cycle.
Here are the steps to calculate duty cycle and carrier frequency of a PWM signal using Testlab
For more information about PWM switching frequencies, see the article: https://community.plm.automation.siemens.com/t5/Testing-Knowledge-Base/Interpreting-Colormaps/ta-p/5...