PWM rectifier

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

A new high power factor bidirectional hybrid three-phase rectifier

Abstract: This paper presents a new bidirectional hybrid three-phase rectifier suitable for medium and high power applications. The rectifier employs a three-phase diode bridge rectifier and a boost-type three-phase PWM rectifier. The proposed rectifier is capable of providing sinusoidal input currents with low harmonic distortion and DC output voltage regulation. The rectifier topology generation, the principle of operation, control scheme and simulation results are described in the paper.

A novel carrier-based PWM strategy for hybrid multilevel inverters

Abstract: The hybrid multilevel power conversion has achieved attention in resent years for minimizing the cascaded cells number for given output voltage levels. However, the equipment complexity is not really decreased due to the adopting of PWM rectifier and this restrains its industry utilization. In order to avoid using controlled rectifier, the hybrid frequency carrier-based PWM (HFPWM) control strategy adapted to hybrid power cells is presented in this paper. In comparison with the general scheme, this proposed strategy is able to make each cell of the hybrid inverter participate PWM modulation and have the same output voltage polarity. Thus the reverse current of the low-voltage cell is not present and this power cell can also be fed by diode rectifier. The hybrid multiply connecting approach of the transformer secondary windings feed for the three-phase diode rectifiers with different input voltages is illustrated in this paper. The driving approach of each power cell is derived from this strategy and realized on the hybrid seven-level adjustable-speed drive laboratory system. This control strategy will benefit the energy saving applications such as speed control of pumps and blowers.

A Stationary-Frame Current Vector Control Strategy for Single-Phase PWM Rectifier

Abstract: Traditional current control methods for a single-phase rectifier in an electric traction drive system suffer from either long response time or nonzero steady-state error. A novel current vector control strategy in stationary-frame is therefore proposed, in this paper, to improve the control performance of a rectifier. The mathematic model of the single-phase two-level pulse rectifier was first analyzed by complex space vector. Then, the principle of the proposed current control method was described. Based on this, the implementation and parameter tuning method of the current control algorithm based on a space complex vector in a two-phase stationary coordinate system are presented. Moreover, two kinds of general current control algorithms are analyzed and compared with the proposed algorithm to demonstrate the advantages of the proposed algorithm. The proposed control scheme absorbs advantages of the conventional control schemes, including fast response, zero steady-state error, and active and reactive power independent control, but overcomes their shortcomings. Finally, the theoretical analysis is verified by means of simulation as well as a hardware-in-loop experimental test on an experimental laboratory setup and some comparisons with conventional current control algorithms prove the advantages of the utilized method.

Sensorless control of 3-Phase PWM rectifier

Abstract: This paper presents a simple sensorless voltage oriented control strategy for PWM rectifier and a phase voltage tracking method is presented. The experimental tests show the advantages of the proposed phase tracking method. The control method is applicable to PWM drive converters without hardware changes whether they use space vector modulation method or hysteresis based modulation.

A unit power factor DC fast charger for electric vehicle charging station

Abstract: Widely applications of electric vehicle rely on popularization of charging station. With the increase in the number of charging station, the problem of grid pollution becomes worse and worse, and the charging hours must be decreased to raise the utilization rate of electric vehicle. This article proposes a novel unit power factor DC fast charger for electric vehicle charging stations. This DC fast charger, mainly used in fast-charging station, includes two modules: the input module is three-phase PWM rectifier and the output module is the phase-shift full-bridge converter. The two modules are controlled by only one DSP - TMS320F2812. The three-phase PWM rectifier overcomes traditional rectifier's shortcomings of low power factor and large harmonic, and is higher power than three-phase one-switch or two-switch power factor correction circuit. The phase-shift full-bridge converter is the isolated high-frequency DC-DC converter, and apt to be used in high power situation. Furthermore, the volume and weight of the proposed charger are decreased than conventional converter with grid-frequency transformer. A prototype of 10 kW Charger is constructed. The experimental results show that the novel DC fast charger has excellent electrical characteristics, and it can be applied to the electric vehicle charging stations.