一种新型多段式广义电压矢量波形生成法的数字仿真研究及单片机实现

The Digital Simulation and Microprocessor Realization of a New Multi-Segment Waveform Generation by a Generalized Voltage-Vector

在广义电压矢量模型基础上,采用宽范围低频段异步调制,获得工频内无跳档且载波频率恒定并可任意设置的平滑工作特性。克服了低频分段同步调制所带来的换档电流尖峰,限制了低频谐波频带,改善了电机的低速运行特性。高频段采用最优多边形同步跟踪,获得对称的同步轨迹和波形。数字仿真解决了轨迹的动态衔接和动态响应等问题。8098单片机的实时实现证实了本方案的可行性。

In this paper, an asynchronous modulated flux-locus method for PWM drives in wide lower frequency range is developed. There is no carrier jump in this range. The smaller average dynamic current characteristics is realized, therefore the more excellent motor response is obtained. In the higher output frequency range, optimized symmetry polygons is used for the flux-locus approach, as a result, more symmetrized wave-forms are generated. The fully transparent digital simulation ensures the possibility of realization of this approach. The real-time implementation by Intel-8098 processor confirms the simulation result.