DocumentCode :
826103
Title :
Speed control for field-weakened induction motor drive
Author :
Huang, M.S. ; Liaw, C.M.
Author_Institution :
Dept. of Electr. Eng., Nat. Tsing Hua Univ., Taiwan, Taiwan
Volume :
152
Issue :
3
fYear :
2005
fDate :
5/6/2005 12:00:00 AM
Firstpage :
565
Lastpage :
576
Abstract :
The speed control of a field-weakened (FW) indirect field-oriented (IFO) induction motor drive with compensations for system dead-time and parameter variations is presented. Firstly, the DSP-based motor drive with a field-weakening mechanism is designed. To handle the command tracking and load rejection speed controls simultaneously, the proposed control scheme consists of a feedback controller and a command feedforward controller (FC) to possess two degrees of freedom (2DOF). The feedback controller is designed according to the given load rejection control requirements, and the command FC is set as the inverse plant model to let the tracking response follow the one defined by a reference model. Then, to reduce the effects of system dead-time and parameter variations on the speed control performance, a dead-time and disturbance compensator (DTDC) is proposed with its parameters being adapted by a variable-structure system (VSS). In addition to dead-time compensation, an estimated signal containing plant uncertainties and disturbances is generated and used for cancelling their effects on dead-time compensation control. Moreover, the tracking response is further enhanced by adaptively adjusting the parameters set in the FC and the DTDC according to the estimated mechanical inertia change. The practical considerations for simultaneously providing a good load rejection control response are also presented. Finally, the closed-loop regulation control is provided by adding a linear model following control (LMFC) scheme.
Keywords :
circuit feedback; feedforward; induction motor drives; machine control; variable structure systems; velocity control; DSP-based motor drive; closed-loop regulation control; dead-time compensator; disturbance compensator; feedback controller; feedforward controller; field-weakened induction motor drive; indirect field-oriented induction motor drive; inverse plant model; linear model following control; load rejection control; speed control; two degrees of freedom; variable structure system;
fLanguage :
English
Journal_Title :
Electric Power Applications, IEE Proceedings -
Publisher :
iet
ISSN :
1350-2352
Type :
jour
DOI :
10.1049/ip-epa:20055168
Filename :
1436180
Link To Document :
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