Hybrid control strategy combining digital PID control and repetitive control is applied in the external voltage loop to achieve less waveform distortion and better dynamic performance. 同时在电压外环中采用数字PID控制和重复控制相结合的复合控制策略,减小波形失真,改善动态特性。
PT secondary voltage loop weakness tache and improvement measure PT二次电压回路薄弱环节及改进措施
New Calculation Method of the Circulating Current in Delta Side Based on Voltage Loop Equation of Transformer 基于变压器回路方程的三角形侧绕组中环流求取新方法
In order to make more effective control of universal power quality controllers ( UPQC), an outer loop model for the voltage loop in a three-phase three-wire UPQC is proposed in the paper. 为了对通用电能质量控制器直流侧电压进行更为有效的控制,提出一种用于三相三线通用电能质量控制器(UPQC)直流侧电压控制的外环模型。
The Design of PFC Control Circuit in Voltage Loop Compensating Network Based on GA 基于遗传算法的PFC控制电路电压环的优化设计
Due to the particular load characteristic, both the current loop and voltage loop control circuits are devised. 并且针对其独特的负载特性,在设计电流闭环控制电路的同时,还设计了电压环控制电路。
The paper proposes a PFC voltage loop simulation model based on system modelling method. 提出了一种基于系统建模法的PFC电压环仿真模型。
This PFC was realized by employing sliding-mode variable-structure inner current loop control and outer voltage loop PI control with digital low-pass filter to achieve high performance. 提出了采用滑模变结构电流内环与由PI调节器和数字低通滤波器组成的电压外环相结合的控制系统,以实现高性能高速度的功率因数校正。
This paper presents a digital multiple-loop control technology of inverters. The scheme incorporates a current loop with an instantaneous voltage loop, while a repetitive control outer loop is added. 本文提出了一种逆变器数字多环控制技术,该方案在电流环和瞬时电压环之外附加了一个重复控制环。
Then an equivalent voltage loop is set up. 为了采用线性控制理论来研究非线性问题,还需要建立对应的等效电压环。
The outer voltage loop is digitally controlled and the inner current loop is controlled by hysteresis band with analog circuit for PFC control in the sect of rectifier, and the design of controller parameters is analyzed. 该高频UPS的整流部分采用数字化的电压外环和硬件模拟电路实现滞环控制的电流内环相结合的PFC控制,文章分析了电压环和电流环控制器参数的设计方法;
The control strategy of 3-phase induction motor operation with unity power factor is introduced. The model of current loop and small signal model of voltage loop based on transfer function are set up. The experiment system based on digital and analog hybrid control is designed. 介绍了三相感应电动机单位功率因数运行的控制策略,以传递函数形式建立了电流环的数学模型和电压环的小信号数学模型,研制了以单片微处理机器为核心的数字模拟混合实验系统。
The simulation studies and parameter optimizations are made for the voltage loop, pulse compensation circuit and the input filter respectively. 对电路的电压环及其脉动补偿电路、输入滤波器进行了仿真研究和参数优化。
According to the improved pulse compensation circuit, the relation between pulse compensation and crossover frequency of the voltage loop is analyzed, and the parameters of the voltage loop are optimized. 在优化的脉动补偿环节的基础上,分析了脉动补偿和电压环穿越频率的关系,对电压环部分的参数作了优化。
The design of the voltage loop and current loop of three-phase high power factor PWM rectifier is introduced, and successfully applying self-adaptive PI fuzzy control to the control strategy of rectifier in order to improve the control accuracy of lateral DC voltage. 主要介绍了三相高功率因数PWM整流器电流环和电压环的设计,并成功的将参数自适应PI调节应用到整流器的控制策略中,以提高直流侧电压的控制精度。
The dissertation builds up computer simulating model of voltage loop control. 建立了电压环控制的仿真模型。
The theory of the converter is analysesed, the structure model of the voltage loop is built and the design process is proposed. 文中分析了该变换器的工作原理,给出了系统电压环的结构模型和设计过程。
The objective of design optimization for the voltage loop is to minimize the gain of the line ripple voltage. 电压环以线纹波电压增益最小为目标,优化结果表明电压环的带宽明显减小,纹波抑制能力远远优于优化前的。
The whole control unit is divided into the voltage loop control and the current loop control. 整个系统控制分为电压环控制和电流环滑模控制。
On the basis of the mathematical descriptions of three-phase rectifier in which load, filter and switching matrix are taken into account together, the sliding mode controllers with double closed-loop structures of current and voltage loop are designed to obtain optimal PWM and desired closed-loop dynamics. 将负载、滤波器和开关阵一起考虑,建立了三相整流器的数学模型.基于上述模型设计了具有电流环和电压环双闭环结构的滑模变结构控制器。
Firstly, the features of APFC digital control chip are introduced, then analyzes the principle of digital control APFC based on OCC scheme and determine the sampling frequency and method of the measurement, and the digital controller parameter of voltage loop is designed. 首先介绍APFC数字控制芯片的特点,然后分析了单周期控制数字APFC的工作原理,确定了控制信号的采样频率和测量方法,并对电压环数字控制器的参数进行了详细的设计。
Through thorough analysis and research on current loop and voltage loop of the converter, a system-level design of the converter is completed. Performance of the system-level design is validated with Matlab. 再后,对转换器电流环和电压环的设计进行了深入分析与研究,完成了转换器的系统级设计,并用Matlab对系统级设计的性能进行了验证。
The control diagram under the rotating d-q-0 coordinates, with outer voltage loop and inner current loop is obtained after the analysis of the control objectives and tasks for the three-phase four-leg APF. 分析了三相四桥臂有源电力滤波器的控制目标和任务,得到了d-q-0坐标下的电压外环、电流内环控制框图。
In this article, the analysis is focused on the voltage loop control and current loop control for the step-down and step-up converters and the common feature are internal compensation, adjustable output voltage. 在本文中,主要针对DC/DC转换器中的升压和降压转换器中电压环控制和电流环控制进行分析,其特点是内置补偿,并且都是输出可调型,前馈电阻并联与分压电阻之上。
Based on analysis of voltage loop frequency compensation, stability is realized through internal compensation. Over voltage protection circuit, over temperature protection circuit and other protection circuits are designed, which make the system more reliable and stable. 在对电压环路的稳定性进行分析的基础上,利用内部频率补偿实现了稳定性设计。另外,芯片还集成了过压保护、过温保护等多种保护电路,确保系统更加安全和稳定。
According to the different requirements of outer voltage loop and inner current loop of the system, a system control structure has been designed, and the calculation formula of PI parameters in each loop have been derived. 根据系统对电压外环和电流内环性能的不同要求,设计了系统的控制结构,推导出了各个环路PI参数的计算公式。
Using system zeroes and poles approach, analysis of voltage loop frequency compensation is also presented. Stability is realized through internal compensation. 本文还从零极点的角度对电压环路的频率补偿结构进行了分析,并利用内部补偿实现了稳定性设计。
According to the project method study the way to design the voltage loop and the voltage and current loop of the Buck converter. Through bode graph, simulation and experimental test the feasibility of the PI parameter configuration. 根据工程法,研究了Buck变换器的电压环和电压电流双闭环的设计,通过伯特图、仿真和实验验证了PI参数配置的可行性。
Modeling and compensation parameter design of the DC bus voltage loop are done. Mechanism of produce of third harmonic is analyzed and gives the voltage loop piecewise control strategy. 对直流母线电压环进行了建模和参数设计,分析了三次谐波的引入机理,并给出了电压环分段控制策略。