Decoupling Control of Three Phase Boost Type PWM Rectifiers Based on Storage Function

2011 ◽  
Vol 71-78 ◽  
pp. 3988-3991
Author(s):  
Jiu He Wang ◽  
Hong Ren Yin
Keyword(s):  
Control System ◽  
Harmonic Distortion ◽  
Decoupling Control ◽  
Total Harmonic Distortion ◽  
Control Law ◽  
Pwm Rectifier ◽  
Storage Function ◽  
Simulink Simulation ◽  
Three Phase ◽  
Pwm Rectifiers

Based on the model of three phase boost type PWM rectifier in synchronous dq coordinates, a simple control law, which transforms the rectifier control system into decoupling and linear one,is deduced based on storage function. New rectifier control system based on the law has many advantages, such as simpler structure, and low total harmonic distortion,and good robustness for load. Decouping control system of three phase boost type PWM rectifiers is proved feasible by simulink simulation.

Study of the Influence of Control System Parameters on the Quality of the Input Current of a Three-Phase Power Factor Corrector

2021 ◽  
Vol 2 (2) ◽  
pp. 29-35
Author(s):  
Dmitry A. Sorokin ◽  
◽  
Sergey I. Volskiy ◽  
Jaroslav Dragoun ◽  
◽  
...  
Keyword(s):  
Control System ◽  
Power Factor ◽  
Harmonic Distortion ◽  
Total Harmonic Distortion ◽  
Input Current ◽  
System Operation ◽  
Error Amplifier ◽  
Three Phase ◽  
Power Factor Corrector

The paper suggests a control system of a three-phase power factor corrector. The study of the control system operation is carried out and the expressions for calculating the permissible values of error amplifier factors are obtained. The influence of the error amplifier parameters on phase current quality is investigated. The dependence of total harmonic distortion input current on a combination of error amplifier parameters is obtained at a given value of power factor. The conditions under which the total harmonic distortion input current has the minimum value are found out. This article is of interest to power electronics engineers, who are aimed at developing a three-phase power factor corrector.

Vector Decoupling Control Strategy for Three-Phase Voltage Source PWM Rectifier

2013 ◽  
Vol 336-338 ◽  
pp. 450-453
Author(s):  
Jian Ying Li ◽  
Wei Dong Yang ◽  
Ni Na Ma
Keyword(s):  
Power Factor ◽  
Control Strategy ◽  
Reactive Power ◽  
Decoupling Control ◽  
Voltage Source ◽  
Pwm Rectifier ◽  
Phase Voltage ◽  
Unity Power Factor ◽  
Three Phase ◽  
Rotating Coordinates

In view of the fact that active power and reactive power have coupling relation, a novel vector decoupling control strategy is presented for three-phase voltage source PWM rectifier. In the paper, the power control mathematical mode of the PWM rectifier is deduced based on the mathematical model of rectifier in synchronous d-q rotating coordinates, and a new voltage feed forward decoupling compensation control strategy is proposed. The simulation results show that the voltage and current of the three-phase PWM rectifier have better respond preference, the current aberrance is smaller and the voltage is steady under the control strategy. The PWM rectifier can implement PWM commute with unity power factor, but also feed back the energy to AC side with unity power factor.

Improved Virtual-Flux-Linkage Observation Method of PWM Rectifier

2014 ◽  
Vol 678 ◽  
pp. 528-532 ◽  
Author(s):  
Wen Shao Bu ◽  
Lei Lei Xu
Keyword(s):  
Control System ◽  
Estimation Method ◽  
Pwm Rectifier ◽  
Flux Linkage ◽  
Grid Voltage ◽  
Three Phase ◽  
Low Pass ◽  
Observation Method ◽  
Low Pass Filters ◽  
Virtual Flux

In order to improve the virtual flux oriented vector control performance of PWM rectifier, an improved observation method of virtual flux-linkage is proposed. To avoid the relevant problems of pure integrator, and to achieve the accurate observation of the grid voltage’s phase, three first order low-pass filters are cascaded to displace the pure integrator. Based on the SVPWM modulation module and the presented algorithm, grid voltage sensorless control system of three-phase PWM rectifier is given. Simulation results have shown that: either in rectifying or inverting status, the amplitude and phase of virtual flux-linkage can be observed accurately, i.e. the control system of PWM rectifier can operate reliably without the grid voltage sensors; the presented estimation method of virtual flux-linkage is effective.

Analysis of Three Phase Linear Synchronous Motor Distortion Factor

2014 ◽  
Vol 792 ◽  
pp. 239-244 ◽  
Author(s):  
Koichi Nakaiwa ◽  
Hiroyuki Wakiwaka ◽  
Kunihisa Tashiro
Keyword(s):  
Harmonic Distortion ◽  
Synchronous Motor ◽  
Motive Force ◽  
Total Harmonic Distortion ◽  
Distortion Factor ◽  
Form Change ◽  
Linear Synchronous Motor ◽  
Halbach Array ◽  
Three Phase ◽  
Electro Motive Force

The relation between the Electro Motive Force (EMF) and Total Harmonic Distortion (THD) was compared and verified by magnet arrangement. Using Halbach array, thrust was more increase by change of magnet arrangement. Moreover, the variable trend of cogging and THD by magnet ratio and magnet form change was checked.

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