How can I Synchronise two ePWM?

Hello, I am working on LaunchPad LAUNCHXL-F28377S with Matlab Simulink. I am trying to deploy a simulink model which has used 3 ePWM (ePWM7A, ePWM8A and ePWM6A).

I want that ePWM7A and ePWM8A should get synchronised. How can I do that?

Answer 1

[Samar]

Hello @Manish Tathode,

The two ePWMs can be synced by configuring one ePWM module as the master and the other as the slave using the Time-Base Synchronization feature.

Follow the steps below to synchronize the two ePWMs:

• Configure ePWM7A as the master by setting the “Synchronization Output (SYNCOUT)” to occur when CTR = Zero. This makes sure that ePWM7A emits a synchronization pulse at the beginning of each period.
• Configure ePWM8A as the slave by enabling “Synchronization Input (SYNCIN)” to accept the synchronization pulse from ePWM7A.
• To allow phase synchronization, set “Phase Enable (PHSEN)” as “on”.
• To introduce a desired phase shift, set the “Phase Offset (TBPHS)” to the desired value.
• Ensure that both ePWM7A and ePWM8A have the same “Time-Base Period (TBPRD)” and “counter mode”.

This workflow is demonstrated in the link provided below. Refer it for more information and a better understanding.

www.mathworks.com/help/ti-c2000/ug/time-base-counter-synchronization-epwm-example.html

I hope this helps!