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Automatic Tolerance Band Tuning in Direct Torque Control

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Abstract:

Semester project at ABB Drives, November 2006 - January 2007, supervised by the Automatic Control Laboratory, ETH Zurich

The problem when using DTC as control strategy on drives is, that with constant hysteresis band width for torque and flux error, the switching frequency of the inverter becomes a function of the modulation index/motor speed. Furthermore, switching frequency depends on the machine currently used. So far, a manual and time-consuming tuning process (1 day) lead to a standard configuration of the inverter base curves. Now an automatic tolerance band tuning algorithm has been developped and implemented in Excel/Visual Basic using DriveDebug (by ABB) as interface to the drive. The tool takes tuning goals (desired switching frequencies and torque switchings ratio) as input and in less than one hour, the base curves are configured without user interaction to meet the specified goal on a real drive.



Type of Seminar:
IfA Seminar
Speaker:
Jonas Kley
Date/Time:
Feb 01, 2007   11am
Location:

K25
Contact Person:

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