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Accepted Papers 
Model Predictive Power Control of a PWM Rectifier
for Electromagnetic Transmitters
Jialin Zhang, Yiming Zhang, Bing Guo, and Junxia Gao 
Abstract 
Model predictive direct power control (MPDPC) is a widely recognized highperformance control strategy for a threephase
gridconnected pulse width modulation (PWM) rectifier. Unlike those of conventional gridconnected PWM rectifiers, the active
and reactive powers of permanent magnet synchronous generator (PMSG)connected PWM rectifiers, which are used in
electromagnetic transmitters, cannot be calculated as the product of voltage and current because the back electromotive force (EMF)
of the generator cannot be measured directly. In this study, the predictive power model of the rectifier is obtained by analyzing the
relationship among flux, back EMF, active/reactive power, converter voltage, and stator current of the generator. The concept of
duty cycle control in the proposed MPDPC is introduced by allocating a fraction of the control period for a nonzero vector and rest
time for a zero vector. When nonzero vectors and their duration in the predefined cost function are simultaneously evaluated, the
global power ripple minimization is obtained. Simulation and experimental results prove that the proposed MPDPC strategy with
duty cycle control for the PMSGconnected PWM rectifier can achieve better control performance than the conventional MPDPCSVM
with gridconnected PWM rectifier. 
Keyword 
Direct power control, Electromagnetic transmitter, Model predictive control, Permanent magnet synchronous
generator 
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