Matrix converter fed motor drive is superior to pulse width modulation inverter drives since it not only provides bi-directional power flow,sinusoidal input/output currents,unity input power factor,but also allows a c...Matrix converter fed motor drive is superior to pulse width modulation inverter drives since it not only provides bi-directional power flow,sinusoidal input/output currents,unity input power factor,but also allows a compact design due to the lack of DC-link capacitors for energy storage.In this paper,model and control of matrix converter fed induction motor drive system are analyzed.A combined control strategy is simplified and improved,which realizes space vector pulse width modulation of matrix converter and rotor flux oriented vector control technique for induction motor drive simultaneously.This control strategy combines the advantages of matrix converter with the good drive performance of vector control technique.Experimental results demonstrate the feasibility and effectiveness of the proposed control strategy.展开更多
This paper signifies the study of modeling and simulation of a single phase matrix converter for induction heating system. The working principle and the control method, using PID are revealing in detail. The performan...This paper signifies the study of modeling and simulation of a single phase matrix converter for induction heating system. The working principle and the control method, using PID are revealing in detail. The performance of the system is carried out in MATLAB/Simulink environment with pulse width modulation switching strategy by varying the duty cycle. PID control is employed to obtain the better performance for a specified input supply for various output frequencies. The proposed control strategy of AC to AC converter has been discussed with a wide range of operating frequencies and results in low Total Harmonic Distortion.展开更多
文摘Matrix converter fed motor drive is superior to pulse width modulation inverter drives since it not only provides bi-directional power flow,sinusoidal input/output currents,unity input power factor,but also allows a compact design due to the lack of DC-link capacitors for energy storage.In this paper,model and control of matrix converter fed induction motor drive system are analyzed.A combined control strategy is simplified and improved,which realizes space vector pulse width modulation of matrix converter and rotor flux oriented vector control technique for induction motor drive simultaneously.This control strategy combines the advantages of matrix converter with the good drive performance of vector control technique.Experimental results demonstrate the feasibility and effectiveness of the proposed control strategy.
文摘This paper signifies the study of modeling and simulation of a single phase matrix converter for induction heating system. The working principle and the control method, using PID are revealing in detail. The performance of the system is carried out in MATLAB/Simulink environment with pulse width modulation switching strategy by varying the duty cycle. PID control is employed to obtain the better performance for a specified input supply for various output frequencies. The proposed control strategy of AC to AC converter has been discussed with a wide range of operating frequencies and results in low Total Harmonic Distortion.
基金Project supported by Provincial Science and Technology Plan of Hunan(2007FJ4057)Project supported by Doctorial Foundation of Xiangtan University(06QDZ03)
文摘为了对柔性直流输电模块化多电平换流器(modular multilevel converter,MMC)的电磁兼容性进行分析和优化,考虑死区时间对子模块投切以及子模块电容电压波动和桥臂电流高次谐波的影响,建立了MMC传导骚扰源计算模型,分析了对骚扰源强度产生影响的MMC主电路参数。计算结果显示,在150 k Hz^30MHz范围内,差模骚扰源强度要高于共模骚扰源。通过对比分析,得出了子模块个数、子模块电容以及桥臂电感对骚扰电压影响的机理和规律。其中,子模块数的增多会使得死区时间的影响更为显著,从而增大差模和共模骚扰源的高频包络线,骚扰源强度随子模块个数增加呈现出饱和递增的特性;子模块电容和桥臂电感的均可以对传导骚扰起到一定的抑制作用,但除了桥臂电感可以显著降低差模骚扰源强度之外,其余影响均较为轻微。在此基础上,提出了考虑电磁兼容性优化的换流器主电路参数选择建议。
