当三相四桥臂逆变器用于UPS时，要求其中线电压很低。
The neutral voltage of the three-phase four-leg inverter employed in UPS is desired to be very low.
本文研究了四桥臂逆变器的工作原理，分析了它能抑制不平衡负载的机理。
The principles of four legs inverter about how to work and how to restrain the unbalanced load are studied in this dissertation.
针对分布式发电系统负载的不确定性，为提高系统的适应性，文中在逆变环节采用四桥臂逆变器。
Three-phase four-leg inverter is used in the inverter link to improve the adaptability of the system because loads in distributed generator are uncertain.
本文将三相四桥臂逆变器与重复控制技术、PI双闭环控制相结合，满足了非线性不平衡负载的要求。
In order to solve the problem mentioned above, a novel design which combines three phase fourlegs inverter, repetitive controller and PI double loop control.
针对离网型小型风力发电系统中负载具有随机性和不平衡性的特点，本文将三相四桥臂逆变器应用于该系统。
In small scale wind power generation systems, the loads are stochastic and unbalanced sometimes, which put forward special requirements to the inverter.
在分析三相四桥臂逆变器工作模态的基础上，引入开关状态函数建立了四桥臂逆变器系统离散的、非线性的数学模型。
A discrete and nonlinear mathematical model of three-phase four-leg inverter is built up with the switch state functions based on the analysis of its working modes.
文中还分析了采用三维SVPWM时逆变器的电压利用率，给出了基于所提算法和其它3种调制方法的四桥臂逆变器仿真结果。
Moreover, the voltage utilization ratio of the inverter with 3D-SVPWM is analyzed, and the simulated results of the four-leg inverter with the four above-mentioned methods are compared.
该文提出了一种采用内环空间矢量电流调节器和外环同步坐标比例积分控制器相级联的三相四桥臂逆变器的控制方案，实现了对三相四桥臂逆变器的解耦控制。
This paper presents a decoupled control scheme for three?phase four?leg inverter through an inner current regulator based on space vector cascaded with an outer synchronous frame PI controller.
本文将三次谐波注入的PWM控制方案应用到四桥臂三相逆变器中，可以带非对称负载且具有较高的电压利用率。
The PWM control strategy with 3-th harmonic in addition is presented for four-leg three-phase inverter, the inverter can deal with unbalanced load and has a high utilization of dc bus voltage.
本文将三次谐波注入的PWM控制方案应用到四桥臂三相逆变器中，可以带非对称负载且具有较高的电压利用率。
The PWM control strategy with 3-th harmonic in addition is presented for four-leg three-phase inverter, the inverter can deal with unbalanced load and has a high utilization of dc bus voltage.
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