A reformed PID (Proportional-Integral-Differential) motor controller is developed for the ideal winding performance. It is verified that the PID motor controller can largely improve the mechanical performance and rais...A reformed PID (Proportional-Integral-Differential) motor controller is developed for the ideal winding performance. It is verified that the PID motor controller can largely improve the mechanical performance and raise the production efficiency by means of the test of a winding production system driven by a motor with high internal resistance rotator. It indicates that improving the control method is one of the most effective ways to improve the winding performance of the motor in winding production.展开更多
为实现中低压直流互联场景中串并联直流固态变压器的高效传输和灵活调压,组合CLLLC变换器模块和Buck/Boost-CLLLC变换器模块形成新的混合型串并联双向直流固态变压器(hybrid series-parallel bi-directional DC solid state transformer...为实现中低压直流互联场景中串并联直流固态变压器的高效传输和灵活调压,组合CLLLC变换器模块和Buck/Boost-CLLLC变换器模块形成新的混合型串并联双向直流固态变压器(hybrid series-parallel bi-directional DC solid state transformer, HSBDCSST),使其兼具Buck/Boost-CLLLC变换器的双向灵活调压和CLLLC变换器的双向高效传输优势。同时提出了CLLLC模块的同步方波控制和Buck/Boost-CLLLC模块的改进虚拟直流电机(improvement virtual direct current motor, IVDCM)控制。其中各CLLLC模块采用同一个固定频率占空比为50%的方波进行控制以保证高效率。而对于Buck/Boost-CLLLC模块,在传统虚拟直流电机(virtual direct current motor,VDCM)控制的基础上引入直流电机额定角速度随机械功率按比例变化的环节,构成IVDCM控制策略,实现调压并改善直流变压器的惯性阻尼特性,有效提高了系统的响应速度与动态特性。最后搭建3模块串并联系统的Matlab/Simulink仿真模型及实验平台,验证了该控制方法的有效性。展开更多
Studying of operation balance in single-phase induction motors is an issue of interest due to the need for reducing the power consumption and increasing the motors’ life. The paper focuses on improving the motor perf...Studying of operation balance in single-phase induction motors is an issue of interest due to the need for reducing the power consumption and increasing the motors’ life. The paper focuses on improving the motor performance by balancing the stator phase operation for the most common-used connection diagrams of single-phase capacitor-run induction motors (SPCRIMs) and three-phase induction motors (TPIMs) operating from single-phase supply (SPS). Therefore, a mathematical model is used to balance the motor operation by varying the frequency supply voltage. Characteristics of balancing parameters are investigated, various methods of motor balancing are presented and comparisons were done among these balancing methods.展开更多
文摘A reformed PID (Proportional-Integral-Differential) motor controller is developed for the ideal winding performance. It is verified that the PID motor controller can largely improve the mechanical performance and raise the production efficiency by means of the test of a winding production system driven by a motor with high internal resistance rotator. It indicates that improving the control method is one of the most effective ways to improve the winding performance of the motor in winding production.
文摘为实现中低压直流互联场景中串并联直流固态变压器的高效传输和灵活调压,组合CLLLC变换器模块和Buck/Boost-CLLLC变换器模块形成新的混合型串并联双向直流固态变压器(hybrid series-parallel bi-directional DC solid state transformer, HSBDCSST),使其兼具Buck/Boost-CLLLC变换器的双向灵活调压和CLLLC变换器的双向高效传输优势。同时提出了CLLLC模块的同步方波控制和Buck/Boost-CLLLC模块的改进虚拟直流电机(improvement virtual direct current motor, IVDCM)控制。其中各CLLLC模块采用同一个固定频率占空比为50%的方波进行控制以保证高效率。而对于Buck/Boost-CLLLC模块,在传统虚拟直流电机(virtual direct current motor,VDCM)控制的基础上引入直流电机额定角速度随机械功率按比例变化的环节,构成IVDCM控制策略,实现调压并改善直流变压器的惯性阻尼特性,有效提高了系统的响应速度与动态特性。最后搭建3模块串并联系统的Matlab/Simulink仿真模型及实验平台,验证了该控制方法的有效性。
文摘Studying of operation balance in single-phase induction motors is an issue of interest due to the need for reducing the power consumption and increasing the motors’ life. The paper focuses on improving the motor performance by balancing the stator phase operation for the most common-used connection diagrams of single-phase capacitor-run induction motors (SPCRIMs) and three-phase induction motors (TPIMs) operating from single-phase supply (SPS). Therefore, a mathematical model is used to balance the motor operation by varying the frequency supply voltage. Characteristics of balancing parameters are investigated, various methods of motor balancing are presented and comparisons were done among these balancing methods.