Part Number: TMS320F28377D
Hello,
We purchased the DesignDRIVE Development Kit IDDK v2.2.1 and I have a few questions on the IDDK_PM_Servo_F2837x project.
It is stated in the file of IDDK_PM_Servo_F2837x-Settings.h as follows:
// ************************************************************************
// Scaling factors to bring all current feedbacks to normal scale
// matching with shunt based measurement
// With shunt, 1.0pu current == 9.945A
// LEM, 1.0pu current == 12A
// SDFM, 0.8906pu current == 12.5A
// ************************************************************************
I cannot figure out what the comments listed above implies.
(1) What is the 1.0pu current for the shunt and LEM based measurement? What does it mean?
(2) Why is the 0.8906pu current used for the SDFM based measurement, instead of the 1.0pu current?
(2) Where does the value of 9.945A come from for the shunt based measurement?
(3) Where does the value of 12A come from for the LEM based measurement?
(4) Where does the value of 12.5A come from for the SDFM based measurement?
Thank you for your guidance.
G. Kim
