A Novel Approach for Improving the PQ in SPIM

Single Phase Induction Motor(SPIM)is widely used in industries at starting stage to provide high starting torque.The objective of the work is to develop a drive for Single Phase Induction Motor that does not use a start or run capacitor.In this work,the researchers present the details about Maximum Power Point Tracking using series-compensated Buck Boost Converter,resonant Direct Current(DC)to Alternate Current(AC)inverter and matrix converter-based drive.The proposed method provides a variable starting torque feature that can be adjusted depending upon machine load to ensure Power Quality(PQ).The system uses Series Compensated Buck Boost Converter(SCBBC)to derive the power from solar source and a Partial Resonant Inverter(PRI)between the Matrix Converter(MC)and DC link battery to reduce the switching loss.The application of Space Vector Pulse Width Modulation(SVPWM)ensures the improvement of power quality at driving terminals of SPIM.The proposed system has been math-ematically modelled and simulated in MATLAB SIMULINK environment and was validated using standardized experimental verification.

SVPWM在单相异步电机变频调速中的应用

针对单相异步电机两相绕组多为不对称型的特点,分析推导该类电机在实现对称运行时,主副绕组上所加电压的关系,并基于两相三桥臂式结构的逆变器,将SVPWM控制技术运用于单相电机变频调速系统。使电机能够对称运行,调速范围宽,定子电流波形正弦度高,且便于DSP编程实现。通过试验波形很好地验证了此控制技术的正确性和有效性。

单相感应电机无速度传感器矢量控制系统

通过分析不对称单相感应电机(SPIM)在不同形态下的数学模型,解决了椭圆形磁场和电机不对称运行的问题。通过电压和电流混合模型磁链观测器计算转子磁链,并进一步计算转子磁链位置和转子转速。在三桥臂逆变器基础上,进行了基于转子磁场定向的不对称SPIM无速度传感器矢量控制仿真,验证了该控制系统的可行性与有效性。