Title :
Optimal rotor flux regulation for fast accelerating induction machines in the field weakening region
Author_Institution :
Inst. of Electr. Machines & Drives, Wien Univ. of Technol., Austria
Abstract :
Quality and reliability of field oriented controlled induction machines depend strongly on the capability of the inverter switching strategy to control the current space phasor according to the desired torque value. Especially at high speed when DC-link voltage is fully utilized the rotor flux level has to be chosen carefully to enable sufficient dynamic qualities of the drive. The paper presents optimal speed and load dependent amplitudes of the rotor flux to achieve constant dynamic behaviour. A combination of an adaptive machine model with a rotor flux controller ensures excellent flux management even during rapid acceleration in the field weakening area. The advantageous function of the scheme is illustrated by experimental results
Keywords :
control system synthesis; controllers; induction motors; invertors; machine control; magnetic flux; magnetic variables control; optimal control; rotors; switching circuits; DC-link voltage; adaptive machine model; constant dynamic behaviour; current space phasor control; desired torque value; fast accelerating induction machines; field weakening region; flux management; induction motor; inverter switching strategy; load dependent amplitudes; optimal rotor flux regulation; optimal speed; quality; rapid acceleration; rapid torque change; reliability; rotor flux; rotor flux controller; rotor flux level; Acceleration; Induction machines; Magnetic flux; Rotors; Space technology; Stators; Testing; Torque control; Vehicle dynamics; Voltage;
Conference_Titel :
Industry Applications Conference, 1997. Thirty-Second IAS Annual Meeting, IAS '97., Conference Record of the 1997 IEEE
Conference_Location :
New Orleans, LA
Print_ISBN :
0-7803-4067-1
DOI :
10.1109/IAS.1997.643055
