PWM rectifier

About: PWM rectifier is a research topic. Over the lifetime, 2254 publications have been published within this topic receiving 25614 citations.

Serial parallel structure electric power transformation device and elevator system using thereof

Abstract: A packaged parallel structured power converting device comprises a power convertor having a PWM rectifier (3A, 3B) and an inverter (4a, 4b) which are parallel connected; a PWM rectifier operating processing device (6) for the control operation of the PWM rectifier; and an inverter operating processing device (7) for the control operation of the inverter. The device comprises: detecting whether the PWM rectifier generates the abnormal PWM rectifier operating processing device (6); and detecting whether the inverter generates the inverter operating processing device (7); when any one of the PWMrectifier operating processing device (6) and the inverter operating processing device (7) generates the abnormality, the signal is sent to another one. Thereby, the invention can be used in the packaged parallel structured power converting device, which can correctly understand the abnormal information and the cutting action and the time order of the information.

Direct power control of the PWM rectifier using sliding mode control

Abstract: This paper presents the analysis and design of the direct power control of a boost PWM rectifier based on sliding mode control. In the aim to improve control performance of the rectifier, the proposed approach combines the merits of sliding mode control, direct power control and space vector modulation. The resulting control scheme is able to drive the output dc voltage to the desired value while keeping a sinusoidal input phase control with a unity power factor. The feasibility and effectiveness of the considered control structure has been examined by computer simulations.

Multi-phase direct-drive permanent-magnet wind power generation variable current integrated system and control method thereof

Abstract: The invention discloses a multi-phase direct-drive permanent-magnet wind power generation variable current integrated system and a control method thereof. The system comprises a multi-phase direct-drive permanent-magnet wind power generator and a modular multilevel inverter, wherein the quantity of three-phase windings of the multi-phase direct-drive permanent-magnet wind power generator is 6n (n is equal to 1, 2, 3 and so on), the modular multilevel inverter comprises six three-phase bridge arms, each bridge arm comprises n sub-modules and a filter inductor, each sub-module comprises a PWM (Pulse Width Modulation) rectifier, two IGBTs (Insulated Gate Bipolar Transistors) and a capacitor, the two IGBTs are connected in series and then are connected in parallel with the capacitor and a DC side of the PWM rectifier, and an AC side of the PWM rectifier is connected with one of the three-phase windings of the multi-phase direct-drive permanent-magnet wind power generator. In the wind power generation system, modular series-parallel connection is performed on three-phase branches, each three-phase winding of the wind power generator is controlled, thus, maximum wind energy capturing and high-voltage direct grid connection of a multi-phase permanent-magnet synchronous motor can be achieved, and a grid-connection transformer is omitted.

The Cascaded Nonlinear PI Control for Three-Phase Votagle Source PWM Rectifier

Abstract: This paper proposes a cascaded nonlinear PI controller for three-phase voltage source PWM rectifier, which is based on its model in synchronous reference frame. The DC bus voltage and the power factor of the PWM rectifier are regulated by three nonlinear PI controllers with high performance. The cascaded nonlinear controller, consisting of the nonlinear function of the error and the traditional PI regulator, improves the dynamic response as well as the robustness of the system. This controller is also easy to be realized. Compared with the traditional PI controllers, the simulation results show that this method can improve the dynamic performance of the system obviously. The experimental results demonstrate the effectiveness of the proposed control algorithm.

On the inherent relationship between finite control set model predictive control and SVM-based deadbeat control for power converters

Abstract: Deadbeat control (DBC) has been known for decades due to its conceptual simplicity and good performance. Recently finite control set model predictive control (FCS-MPC) is emerging as a powerful strategy for control of power converters. Different from DBC, which uses a modulator such as space vector modulation (SVM), FCS-MPC directly obtained the optimal switching states of power converters by minimizing a cost function. Several improved versions of FCS-MPC have been proposed to improve the steady state performance by introducing two or three vectors during one control period. This paper investigates the inherent relationship between SVM-DBC and multiple-vector FCS-MPC. It is found that with the aim of tracking error minimization, the two kinds of predictive methods can be unified in one frame, where the vector sequence and duration in FCS-MPC can be easily obtained from SVM-DBC. In other words, under some special cases, FCS-MPC and its improved versions can be considered as special cases of SVM-DBC. This is the main contribution of this paper, because DBC and FCS-MPC are previously studied separately. The theoretical study is confirmed by the analysis on state-of-the-art DBC and FCS-MPC and supported by the selected simulation study and experimental tests from a three-phase two-level voltage source PWM rectifier.