DocumentCode :
3274596
Title :
Current controller for low switching frequency by means of increasing the vectors time application
Author :
Aldabas, Emiliano ; Romeral, Luis ; Llaquet, Jordi ; Arias, Antoni
Author_Institution :
Electron. Eng. Dept., Univ. Politecnica de Catalunya, Terrassa, Spain
Volume :
2
fYear :
2002
fDate :
5-8 Nov. 2002
Firstpage :
1277
Abstract :
This paper presents a new software-implemented current regulator for three phase loads based on orthogonal two-phase α-β system. The controller uses the module of the error for defining two control situations, called of steady state and transitory, which depend on the position of the current error inside or outside of the hysteresis margin. In the steady state, a new active vector voltage application strategy is used for assuring the nearest trajectory to the diameter of the current error within the circular boundary hysteresis when a vector is applied. Moreover, this vector is chosen between V(0) and V(7) for reducing the number of inverter´s switches commutations. On the other hand, in the transitory zone the control applies only active vectors, for reducing quickly the error inside the hysteresis margins. Computer simulations were carried out in order to investigate the performance of the regulator, and results show the effectiveness of the proposed control scheme.
Keywords :
commutation; electric current control; invertors; load regulation; switching convertors; active vector voltage application strategy; active vectors; circular boundary hysteresis; computer simulations; current controller; current error; hysteresis margin; inverter switches commutations; low switching frequency; orthogonal two-phase α-β system; position error; software-implemented current regulator; three phase loads; transitory zone; vector; vectors time application; Application software; Computer errors; Computer simulation; Error correction; Hysteresis; Regulators; Steady-state; Switches; Switching frequency; Voltage;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
IECON 02 [Industrial Electronics Society, IEEE 2002 28th Annual Conference of the]
Print_ISBN :
0-7803-7474-6
Type :
conf
DOI :
10.1109/IECON.2002.1185459
Filename :
1185459
Link To Document :
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