GE VAT2000 Instruction Manual

Also see for VAT2000 Series: Instruction manual Instruction manual

Contents

6. Control Functions and Parameter Settings6-756-7 Adjusting the vector control speed control related parametersWith the VAT2000, ASR operation is possible by executing automatic tuning and setting simple speedcontrol parameters. However, when carrying out high-response or high-accuracy control, the parametersmust be adjusted in detail. In this section, the configuration and adjustment parameters of the speedcontrol system is explained.6-7-1 Speed control system for Induction MotorsThe speed control system of VAT2000 is configured of blocks as shown below. Automatic tuning is usedfor adjusting the exciting current control, current regulator, flux observer and speed estimationmechanism, so these parameters often do not need to be adjusted. However, the parameters related tothe speed regulator, torque limit, load torque observer, various low path filters, etc., must be adjustedaccording to the user's system. Thus, these cannot be simply adjusted with automatic tuning. The finaluser of the system must adjust these parameters to match the system. Adjustments are carried out whilereferring to the block diagram below.LP F LP FLP FLP FB 3 0- 3S p ee dS e ttingB 3 0- 5B 3 0- 6E xciterC u rr entC o ntrolA 1 0- 0A 3 0- 2A 1 0- 0A S RP C o ntr olG a in Tor queLim iterI C on trolG a in+-A 1 0- 2A 3 0- 2A 1 3- 6A 1 0- 3B 3 1- 0A 11-0B 3 0- 0A 1 0- 4B 3 1- 1A 11-1B 3 2- 0B 3 2- 2A 1 0- 5B 3 1- 2D istu rb an ceO b se rv erTor queC o m m andA 11-2B 1 3- 7B 3 0- 1B 3 0- 7A 11-3B 3 2- 4C u rr entD e te ctionB 3 3- xB 3 4- xB 3 0- 4E stim atedM o to r S pee dD e te cte dM o to r S pee dFlu xO b se rv er& Sp ee dE stim atio nS e ns orlessVe ctor C o ntro lVe ctor C o ntro lw ith se nsorM o to rS p ee dA C RS p ee dD e te ctionM P PLP F++++++--Tor queC u rr entVAT2000 speed control system block diagram(Note) The related parameter Nos. are indicated in the above function blocks.