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Plug-in hybrid electric vehicles (PHEVs) are equipped with a high energy density battery pack, which should be externally charged form the grid. This requires a high power battery charger circuit which can operate at universal input voltage and be capable of maintaining the required output voltage and current with low ripple. The topology composed of PWM boost rectifier cascaded with a bidirectional...
A novel power converter for battery used in the Plug-in Hybrid Electric Vehicle (PHEV) is proposed, which could charge and discharge the battery effectively. The system is composed of two parts: a three phase full bridge PWM rectifier and a DC/DC converter. The PWM rectifier is utilized to rectify the three phase AC to DC voltage, which should be higher than the battery terminal voltage. The DC/DC...
The design of the voltage loop and current loop of three-phase high power factor PWM rectifier was introduced, the strategy of dual-mode control that combine fuzzy control to PI regulator is proposed, which use fuzzy controller to obtain quick dynamic response when deviation is in small range and adopt PI regulator to realize no static error when deviation is in long range, improving the control accuracy...
This paper provides two options for the design of the Proportional + Integral (PI) controller for the DC-link voltage loop, which is found in several topologies, such as AC/DC voltage source converters and Back-to-Back converters among others. The proposed methods are based in the bandwidth approach. For the design of the DC-link voltage loop, the Back-to-Back topology is used and two cases the studies...
This paper proposed a main circuit topology of cascaded compound current quality compensated device. Compared to the conventional topology, it used double PWM converter technology. PWM rectifier provided a stable DC voltage for the device, implemented input power factor approximately 1 and also achieved decoupling control of DC voltage and output current. PWM inverter used harmonic and reactive compound...
A control strategy of positive and negative sequence controllers for three phase voltage source PWM rectifier based on power-equation principle is proposed aim at eliminating the harmonic of dc output voltage. The strategy calculates the commands of positive and negative sequence currents using the equation principle of instantaneous power, and designs positive and negative sequence controllers to...
The circuit and corresponding steady state vectors' relationship of single-phase PWM rectifier using IGBTs (insulated gate bipolar transistors) is analyzed, and the mathematic model and controller structure are presented, the PI regulators of the current and voltage loops are designed respectively. The method based on the Matlab/Simulink Blocks is used to carry out the simulation for the control system...
This paper presents a novel fuzzy logic controller (FLC) for three-phase PWM Rectifier. The fuzzy logic controller is employed in the outer voltage loop. In order to improve the performances of current loop, the antiwindup PI controller of inner current controller is used instead of the traditional PI controller. The complete control scheme of the three-phase PWM Rectifier is implemented in real time...
Voltage-source multilevel inverters have become very attractive for power industries in power electronics applications during last years. The main purposes that have led to the development of the studies about multilevel inverters are the generation of output voltage signals with low harmonic distortion; the reduction of switching frequency. A serious constraint in a multilevel inverter is the capacitor...
In this paper, a new unidirectional three-level rectifier is presented to draw sinusoidal line current with low THD and unity power factor. The adopted rectifier consists of a diode bridge, a power switch and two blocking diodes. Low cost, simple structure and convenient control are the main advantages of this rectifier. A two loop controller is developed to control the adopted rectifier. A voltage...
Usually, the control method with voltage and current PI regulators in synchronous rotating frame is applied to three-phase voltage source PWM rectifier. It is easy to generate inrush current during startup period. A slow ramp reference current is commonly used to achieve the soft starting, but not quite effective. The paper first analyzed the cause of inrush current and obtained the shortcomings of...
In order to eliminate the pulsating instantaneous power of twice of the output voltage frequency in case of single-phase load, a proportional-integral-resonant (PIR) based controller is proposed in this paper for the PWM rectifier in both the dc-link voltage control loop and the ac current control loop. The resonant regulator is very suitable for tracking the ac component, which provides the optimum...
The three-level PWM rectifier topology has been studied in this paper, and the decoupled state-space equations in synchronous rotating reference frame (d-q frame) were derived. The hierarchical controller structure is adopted, namely, the inner current-loop is responsible for reference current tracking and the outer voltage-loop is responsible for load regulation. The design methodologies for proportional-integral...
In this paper, according to the control requirement and actual project conditions of three-phase high power factor rectifier, the research of low switching losses three-phase PWM rectifier adopts hysteresis current control strategy which bases on load current feed-forward control. The system not only improves the high-frequency switching problem, but also makes that the system has much lower dependence...
A nonlinear mathematical model of three-phase voltage source PWM rectifier is established in the dq rotating frame. Aiming at the poor dynamic performance of conventional PI controlled three-phase PWM rectifier, a control system with double close-loops of voltage and current is designed based on the mathematical model of 3-phase PWM rectifier. A sliding-mode control algorithm on synchronous rotating...
This paper make uses of the instantaneous symmetrical components transformation to deal with the cross-coupling terms and the order doubling issue, then a new current regulator design approach is proposed. The theoretical identicalness between the proposed regulator and the synchronous PI regulator is proven, and both the simulation and the experimental results verify the analysis.
According to high power factor and accurate outputs DC voltage which are requirements of three-phase rectifier control as known, the research establishment of one outer voltage loop and two inner current loops as double-loop control system. The outer voltage loop could resist disturbance to achieve accurate output; the inner current loop based on space vector control to achieve high power factor....
According to high power factor and the actual project needs which are requirements of three-phase rectifier control as known, the research of three-phase PWM rectifier is based on the current vector control. The system still adopts hysteresis current control strategy. This system not only truly reflect the operational status of PWM rectifier, but also make the design of control system easier, and...
Control of an advanced high-speed flywheel energy storage system (FESS) based on a high-speed surface mount permanent magnet synchronous machine (PMSM) is explored in this paper. A PWM inverter/rectifier controls the bi-directional flow of energy for charging and discharging the flywheel. During charging, an inner current loop controller and an outer speed loop controller regulate the system performance...
A new stationary frame control scheme for three-phase pulse width modulation (PWM) rectifiers operating under unbalanced voltage dips conditions is proposed in this paper. The proposed control scheme regulates the instantaneous active power at the converter poles to minimize the harmonics of the input currents and the output voltage. The paper novelty is the development of a new current-reference...
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