中压机电驱动系统的 SPWM 脉冲调制方案设计

摘要:

中压型机电驱动装置的脉冲调制技术较为复杂，需考虑死区、窄脉冲滤波等因素。提出一种新型正弦脉冲调 制系统方案。采用 FPGA 设计 SPWM 的脉冲产生程序，提出新型的状态循环算法产生三角载波、脉冲信号，并对调制 波的边沿比较进行了优化。同时，设计了 4． 5 kV IGBT 的驱动板卡，给出了驱动芯片、驱动电路、滤波电路等方案。实 验测试表明，所述方案的死区、脉冲宽度均满足中压 IGBT 的性能指标。

Abstract:

Sinusoidal pulse width modulation ( SPWM) technology of medium － voltage mechanical and electrical drive system is complex，and it needs considering the factors such as dead zone，narrow pulse filter． A new modulation system scheme is proposed． The FPGA is used to design the pulse generation program． The state machine cycle algorithm is also proposed to generate triangular carrier and impulse signal，and the edge of the modulation wave is optimized． At the same time，the driver board of 4． 5 kV IGBT is designed，which contains the drive chip，drive circuit and filter circuit． Experimental tests show that the dead zone and pulse width of the proposed modulation system meet the performance index of medium － voltage IGBT．