Abstract
Low-voltage and high-current direct current (DC) power supplies are essential for aerospace and shipping. However, its robustness and dynamic response need to be optimized further on some special occasions. In this paper, a novel rectification system platform is built with the low-voltage and high-current permanent magnet synchronous generator (PMSG), in which the DC voltage double closed-loop control system is constructed with the backstepping control method and the sliding mode variable structure (SMVS). In the active component control structure of this system, reasonable virtual control variables are set to obtain the overall structural control variable which satisfied the stability requirements of Lyapunov stability theory. Thus, the fast-tracking and the global adjustment of the system are realized and the robustness is improved. Since the reactive component control structure is simple and no subsystem has to be constructed, the SMVS is used to stabilize the system power factor. By building a simulation model and experimental platform of the 5 V/300 A rectification module based on the PMSG, it is verified that the power factor of the system can reach about 98.5%. When the load mutation occurs, the DC output achieves stability again within 0.02 s, and the system fluctuation rate does not exceed 2%.
Highlights
Analysis shows that compared with the backstepping control method, the sliding mode variable structure (SMVS) control the reactive component control structure can accelerate the responsiveness of the alternating current (AC) input current and enter a new steady state faster after load mutation
The waveform of A-phase input current is shown in Figure 18 when the load suddenly increases and decreases under the combination of backstepping control method and SMVS
In the active component control structure, the backstepping control method is used for optimization, which can achieve fast tracking backstepping control method is used for optimization, which can achieve fast tracking and global adjustment of the system by setting intermediate virtual control variables and and global adjustment of the system by setting intermediate virtual control variables and satisfy the stability requirement of Lyapunov stability theory so that a reasonable control satisfy the stability requirement of Lyapunov stability theory so that a reasonable control variable is designed
Summary
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. In [16], a new nonlinear and adaptive state feedback controller with a fast-adaptive robust differentiator was presented, which avoids the complexity of the existing backstepping method but its velocity of tracking input error is slow. In [18], the study focuses on the design of global backstepping control for direct power control This three-phase pulse width modulation (PWM) rectifier has control performance, including lower total harmonic distortion value, less harmonic orders, and faster dynamic response speed. Many previous works have been proposed to control nonlinear systems, none can improve the robustness of the system while rapidly tracking input errors under high-power output conditions. The asymptotically stable nonlinear controller is designed using the backstepping control method for the single-input single-output (SISO) model of the active component control structure. Results are provided in the fourth and the and fifththe partfifth concludes the paper
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