DocumentCode :
553458
Title :
Improved modulation of two-stage matrix converter for EMA in aircraft applications
Author :
Kun Xiao ; Lina Wang ; Wheeler, Pat
Author_Institution :
Sch. of Autom. Sci. & Electr. Eng., Beihang Univ., Beijing, China
fYear :
2011
fDate :
Aug. 30 2011-Sept. 1 2011
Firstpage :
1
Lastpage :
9
Abstract :
This paper presents the improved modulation strategy of Two-Stage Matrix Converter (TSMC) for applications in aircraft Electro-Mechanical Actuator (EMA) system. In the modulation of rectifier stage, Phase Locked Loop (PLL) is employed to track the instantaneous value of both the angle and the frequency of the input voltage vector. The frequency is then taken into calculation to compensate the angle sample delay, as a result of the un-ignorable angle alternation in each Pulse Width Modulation (PWM) cycle at input frequency of 360~800Hz. The drawbacks of the sample delay are discussed, which lie in the incorrect input power factor control, fluctuation of voltage transfer ratio and possibility of short circuit in inverter stage. In the modulation of inverter stage, a 4-time commutation PWM pattern is presented, which reduces the number of commutations from 6 to 4 in each PWM cycle. Therefore, increasing the PWM frequency by 50% remains the same number of commutations thus the same switching loss per time interval. The sample delay and the output current harmonic could be reduced thereafter at the increased PWM frequency. Simulation and experiment results verify the improved performance of the proposed modulation.
Keywords :
PWM power convertors; aircraft; commutation; electromechanical actuators; invertors; matrix convertors; phase locked loops; rectifiers; aircraft electromechanical actuator; angle alternation; commutation PWM pattern; inverter stage; phase locked loop; power factor control; pulse width modulation; rectifier stage; two-stage matrix converter; voltage transfer; Delay; Frequency modulation; Inverters; Phase locked loops; Pulse width modulation; Rectifiers; Actuator; Adjustable speed control; Matrix converter; Modulation strategy; Pulse Width Modulation (PWM);
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Power Electronics and Applications (EPE 2011), Proceedings of the 2011-14th European Conference on
Conference_Location :
Birmingham
Print_ISBN :
978-1-61284-167-0
Electronic_ISBN :
978-90-75815-15-3
Type :
conf
Filename :
6020316
Link To Document :
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