A novel current chopping mode was used in a switched reluctance motor drive system to make full use of the characteristics of digital signal processor (DSP) TMS320F240. The necessity of this 180° phase-shift curr...A novel current chopping mode was used in a switched reluctance motor drive system to make full use of the characteristics of digital signal processor (DSP) TMS320F240. The necessity of this 180° phase-shift current control (PSCC) mode is introduced first and then the principle of PSCC covering both hardware requirement and software programming is described in detail. The analysis made indicated that with this mode, the chopping frequency in winding can reach 20 kHz with 10 kHz power switches and the control frequency can reach 40 kHz at the same time. Subsequently, based on the linear and nonlinear mathematical models of the switched reluctance motor (SRM), some simulation work has been done. The simulation results show that when this mode is applied to SRM drive (SRD) system, the current waveform becomes better. So the ripple of the torque is reduced simultaneously and the vibration and acoustic noise are reduced involuntarily. Stationary tests show that the acoustic noise is greatly diminished. Finally, some experiments were made using a 50 kW SRD system for electric vehicle (EV). Experimental results indicate that this mode can be implemented feasibly and it has a good action on the SRD system.展开更多
针对单绕组宽转子齿结构无轴承开关磁阻电机(bearingless switched reluctance motor with wider rotor teeth,BSRMWR)的齿极绕组故障情况,基于该电机的本体结构与工作原理,提出一种兼顾转矩性能与悬浮力稳定性的补偿方法。建立适用于...针对单绕组宽转子齿结构无轴承开关磁阻电机(bearingless switched reluctance motor with wider rotor teeth,BSRMWR)的齿极绕组故障情况,基于该电机的本体结构与工作原理,提出一种兼顾转矩性能与悬浮力稳定性的补偿方法。建立适用于该悬浮力补偿方式的电机新型数学模型;为了在应用悬浮力补偿方式时的稳定悬浮,将一种新型悬浮力分配函数(force sharing function,FSF)引入电流斩波控制(current chopping control,CCC)策略。通过仿真软件及硬件实验平台,验证CCC&FSF控制方法对稳定悬浮力的有效性,以及基于CCC&FSF策略下的悬浮力补偿方法在绕组故障时的有效性。展开更多
文摘A novel current chopping mode was used in a switched reluctance motor drive system to make full use of the characteristics of digital signal processor (DSP) TMS320F240. The necessity of this 180° phase-shift current control (PSCC) mode is introduced first and then the principle of PSCC covering both hardware requirement and software programming is described in detail. The analysis made indicated that with this mode, the chopping frequency in winding can reach 20 kHz with 10 kHz power switches and the control frequency can reach 40 kHz at the same time. Subsequently, based on the linear and nonlinear mathematical models of the switched reluctance motor (SRM), some simulation work has been done. The simulation results show that when this mode is applied to SRM drive (SRD) system, the current waveform becomes better. So the ripple of the torque is reduced simultaneously and the vibration and acoustic noise are reduced involuntarily. Stationary tests show that the acoustic noise is greatly diminished. Finally, some experiments were made using a 50 kW SRD system for electric vehicle (EV). Experimental results indicate that this mode can be implemented feasibly and it has a good action on the SRD system.
