Abstract
In order to satisfy with the demand of high reliability in the aerospace field, a unified control scheme is proposed for five-phase open-winding permanent-magnet synchronous generator (FPOWPMSG) in this paper. Firstly, the mathematical model of FPOWPMSG in the phase coordinate system is established. Then, the proposed unified control scheme is presented in detail, which is mainly composed of the unified reference current generator, the current regulator, the synchronous electromotive force (EMF) compensator, and the piecewise nonlinear predictive compensator. In the unified reference current generator, normal operation, single-phase open-circuit, adjacent two-phase open-circuit, and non-adjacent two-phase open-circuit are taken into account by introducing a fault matrix. In the current regulator, the PI regulator is used. And the current tracking accuracy and the torque ripple are improved by both the synchronous EMF compensator and the piecewise nonlinear predictive compensator. Finally, the effectiveness of the proposed unified control scheme is validated by experimental results.
Highlights
High-reliability is one major requirement of aerospace applications
A lot of fault-tolerant control methods have been proposed for five-phase motors, they can be mainly divided into two categories: reduced-order decoupling matrix and optimal fault-tolerant current setting [13,14,15,16,17]
A unified control scheme is proposed for five-phase open-winding permanent-magnet synchronous generator (FPOWPMSG) systems in aerospace applications
Summary
High-reliability is one major requirement of aerospace applications. Due to the good fault-tolerant performance, the multiphase motor has attracted more and more attentions recently [1,2,3,4,5,6,7], and the fault-tolerant performance can be enhanced if the number of motor phases is increased. A lot of fault-tolerant control methods have been proposed for five-phase motors, they can be mainly divided into two categories: reduced-order decoupling matrix and optimal fault-tolerant current setting [13,14,15,16,17]. The former one constructs a decoupling matrix in the synchronous rotating coordinate system. A unified control scheme is proposed for five-phase open-winding permanent-magnet synchronous generator (FPOWPMSG) systems in aerospace applications.
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