This paper presents the energy saving method by applying the voltage control technique on a single-phase AC source to a thyristor rectifier and an IGBT inverter with LC filter. Based on the LC filter parameter, the va...This paper presents the energy saving method by applying the voltage control technique on a single-phase AC source to a thyristor rectifier and an IGBT inverter with LC filter. Based on the LC filter parameter, the values of the gain for the controller are obtainable. The proposed controller structure consist</span><span style="font-family:Verdana;">s</span><span style="font-family:Verdana;"> of two loops arranged in a cascaded model. The output of the first loop is the capacitor current. This current is added to the load current in order to obtain the current reference. This reference current value will be compared with the inverter current which produces the error signal to be fed into the second loop in the cascade system. The output of the second loop is the inverter voltage. This voltage is added to the load voltage to produce the voltage reference. This reference is fed to the pulse width modulation generator via the controller and compared with the triangular wave. This energy-saving circuit is designed in blocks using MATLAB Simulink.展开更多
An intelligent control method is proposed to improve the performance of power supply for tundish electromagnetic induction heating,which can adequately regulate the tundish temperature.The topology structure of power ...An intelligent control method is proposed to improve the performance of power supply for tundish electromagnetic induction heating,which can adequately regulate the tundish temperature.The topology structure of power supply for tundish electromagnetic induction heating is presented,and its working principle is analyzed.The power supply consists of six power units,and each of them consists of a fore-stage threephase rectifier and back-stage single-phase inverter.The feedforward control DC voltage is used by three-phase rectifier to obtain the stable DC voltage supplied to the inverter.The cloud controller based intelligent temperature control algorithm is combined with the power feed-forward algorithm to obtain accurate tracking of the output current and constant temperature control of the tundish steel in the back-stage inverter.The simulation and experiment are performed to verify the accuracy and effectiveness of the proposed method.展开更多
文摘This paper presents the energy saving method by applying the voltage control technique on a single-phase AC source to a thyristor rectifier and an IGBT inverter with LC filter. Based on the LC filter parameter, the values of the gain for the controller are obtainable. The proposed controller structure consist</span><span style="font-family:Verdana;">s</span><span style="font-family:Verdana;"> of two loops arranged in a cascaded model. The output of the first loop is the capacitor current. This current is added to the load current in order to obtain the current reference. This reference current value will be compared with the inverter current which produces the error signal to be fed into the second loop in the cascade system. The output of the second loop is the inverter voltage. This voltage is added to the load voltage to produce the voltage reference. This reference is fed to the pulse width modulation generator via the controller and compared with the triangular wave. This energy-saving circuit is designed in blocks using MATLAB Simulink.
基金supported in part by the National Key Research and Development Program of China(No.2016YFB0601302)Science and Technology Major Programs of Hunan Province,China(No.2016GK1002)
文摘An intelligent control method is proposed to improve the performance of power supply for tundish electromagnetic induction heating,which can adequately regulate the tundish temperature.The topology structure of power supply for tundish electromagnetic induction heating is presented,and its working principle is analyzed.The power supply consists of six power units,and each of them consists of a fore-stage threephase rectifier and back-stage single-phase inverter.The feedforward control DC voltage is used by three-phase rectifier to obtain the stable DC voltage supplied to the inverter.The cloud controller based intelligent temperature control algorithm is combined with the power feed-forward algorithm to obtain accurate tracking of the output current and constant temperature control of the tundish steel in the back-stage inverter.The simulation and experiment are performed to verify the accuracy and effectiveness of the proposed method.
