A torque angel increment control strategy for electrical excitation flux-switching machines based on space vector modulation

作者：Wang Yu^*; Deng Zhiquan; Wang Xiaolin

来源：Proceedings of the CSEE, 2012, 32(3): 75-82.

• AC machine
• Back-emf
• Comparative experiments
• Control strategies
• Direct Torque Control
• Dynamic performance
• Electrical excitation
• Electromagnet torque
• Flux linkages
• Flux-switching
• High currents
• Machine control systems
• Simple structures
• Space Vector
• Space vector modulation (SVM)
• Space-vector modulation
• Stator flux linkage
• Steady performance
• TMS320F2812
• Torque controllers
• Torque ripple
• Total harmonic distortions
• Vector controls

The electrical excitation flux-switching (EEFS) machine, having rugged rotor, bipolar flux linkage and sinusoidal back-EMF, is a new type of brushless ac machine. The direct torque control (DTC), which is one of the two basic control strategies (vector control and direct torque control) of ac machine, has simple structure and good dynamic performance but has high current total harmonic distortion (THD) and big ripple in torque and flux. Thus in this paper, in order to improve both steady and dynamic performances of the EEFS machine control system, an optimized torque control strategy based on space vector modulation (SVM) was proposed, in which the output of PI-based torque controller was defined as the increment of torque angel, and electromagnet torque could be linearly regulated by directly and smoothly controlling stator flux linkage vector increment using space vectors. Further, the capabilities of change stator flux linkage vector increment of maximum space vector and basic forward vector were compared. Comparative experiments of traditional DTC and the proposed strategy were carried on an EEFS machine based on TMS320F2812 control system. The results verify the effectiveness and good dynamic and steady performance of proposed strategy.

• 出版日期2012
• 单位南京航空航天大学