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SYSTEMS AND METHODS FOR CONTROLLING MULTI-LEVEL DIODE-CLAMPED INVERTERS USING SPACE VECTOR PULSE WIDTH MODULATION (SVPWM)
SYSTEMS AND METHODS FOR CONTROLLING MULTI-LEVEL DIODE-CLAMPED INVERTERS USING SPACE VECTOR PULSE WIDTH MODULATION (SVPWM)
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机译:使用空间矢量脉冲宽度调制(SVPWM)控制多电平二极管钳位逆变器的系统和方法
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摘要
Control systems for a multi-level diode-clamped inverter and corresponding methods include a processor and a digital logic circuit forming a hybrid controller. The processor identifies sector and region locations based on a sampled reference voltage vector V* and angle θe*. The processor then selects predefined switching sequences and pre-calculated turn-on time values based on the identified sector and region locations. The digital logic circuit generates PWM switching signals for driving power transistors of a multi-level diode-clamped inverter based on the turn-on time values and the selected switching sequences. The control system takes care of the existing capacitor voltage balancing issues of multi-level diode-clamped inverters while supplying both active and reactive power to an IT load. Using the control system, one can generate a symmetrical PWM signal that fully covers the linear under-modulation region.
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机译:用于多电平二极管钳位的逆变器的控制系统和相应方法包括形成混合控制器的处理器和数字逻辑电路。处理器根据采样的参考电压矢量V *和角度θ e Sub> *识别扇区和区域位置。然后,处理器根据识别出的扇区和区域位置选择预定义的切换序列和预先计算的接通时间值。数字逻辑电路基于导通时间值和所选的开关序列,生成用于驱动多电平二极管钳位逆变器的功率晶体管的PWM开关信号。该控制系统在为IT负载提供有功和无功功率的同时,还解决了多级二极管钳位逆变器中现有的电容器电压平衡问题。使用该控制系统,可以生成一个对称的PWM信号,该信号完全覆盖线性欠调制区域。
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