公开(公告)号：US20120161858A1

公开(公告)日：2012-06-28

申请号：US13329979

申请日：2011-12-19

Applicant: ALFRED PERMUY ,  LUKE SOLOMON

Inventor： ALFRED PERMUY ,  LUKE SOLOMON

IPC: G05F3/02

CPC classification number: H02J7/0014 ,  H02M7/483

Abstract: A method of balancing voltages in a group of capacitors of a power electronic device, such as a multilevel power inverter, includes making a balancing determination regarding whether to (i) inject energy into the selected one of the capacitors from an energy storage element, or (ii) extract energy from the selected one of the capacitors into the energy storage element based on the voltage of a selected one of the capacitors, and either injecting energy into the selected one of the capacitors from the energy storage element, or extracting energy from the selected one of the capacitors into the energy storage element based on the balancing determination. Also, a voltage balancing circuit that implements the method. In one particular implementation, a spatial second derivative algorithm is used. In another particular implementation, a comparison to an average capacitor voltage is used.

Abstract translation: 一种在诸如多电平电力逆变器的功率电子装置的一组电容器中平衡电压的方法包括：是否（i）从能量存储元件将能量注入所选择的一个电容器中的平衡确定;或 （ii）基于所选择的一个电容器的电压将所选择的一个电容器中的能量提取到能量存储元件中，并且从能量存储元件将能量注入到所选择的一个电容器中，或者从 基于平衡确定将所选择的一个电容器插入能量存储元件中。 另外，实现该方法的电压平衡电路。 在一个特定实现中，使用空间二阶导数算法。 在另一个具体实现中，使用与平均电容器电压的比较。