电流变换器

For the continuous input current , the converter can be used in power factor corrector, and the realization is simple.

由于该变换器的输入电流连续，该变换器适合于功率因数校正电路，且其实现较为简单。

Stability analysis: A stability analysis method for equilibrium point of closed systems is proposed.

本文所提出的闭环系统分析方法在电流模控制变换器及准谐振变换器中的推广应用表明了本方法具有宽广的应用前景，因为它们是传统PWM变换技术在控制方法及主电路变换技术方面的新发展。

According to the principles of the matrix converter while working in unbalance input and balance input condition, the simulation model for dynamic modulation strategy of offset angle of input current for matrix converter was founded with Matlab in unbalance input.

据输入非平衡、输出平衡时矩阵变换器的工作原理，用Matlab建立输入非平衡时矩阵变换器的输入电流偏置角动态调制策略的仿真模型。

The technique made full use of the characteristic of PR controller which can realize zero steady-state error in AC input signal in stationary frame. In the method, the active and reactive current component in the vector control strategy were transformed in the stationary frame to achieve the objective of keeping the DC-link voltage constant, adjusting the power factor and decoupling the active and reactive power. Compared with conventional double close-loop proportional integral controller, the PR technique is better in harmonic compensation without the complex rotating frame transformation and the couple or feedback voltage which is easily influenced by temperature and circuit parameters. The control algorithm is easy to be realized while the robustness and power quality is improved.

该方法充分利用了PR控制器能够在静止坐标系下对交流输入信号无静差控制的优势，将矢量控制策略下的有功电流和无功电流分量转换到静止坐标系下进行调节，实现网侧变换器维持直流电压稳定和调节功率因数的控制任务和双馈电机有功、无功功率的解耦控制，与传统的双闭环PI控制相比，该策略无需繁琐的坐标旋转变换，不存在受温度及电路参数影响的耦合项和前馈补偿项，且易于实现对系统低次谐波电流的补偿，减小了控制算法实现难度，提高了控制系统的鲁棒性和电网电能质量。

Firstly, stroboscopic map of inductance current is derived.

通过建立考虑变换器输出电压纹波的电感电流频闪映射，得到了变换器稳定运行的条件。

Through loss mechanism investigation for a gapped inductor ,copper winding scheme and litz wire winding scheme for gapped inductor was evaluated.

对高频率和大电流的开关功率变换器，电感器损耗对温升及变换器效率指标具有重要影响。

Setting zero-current switching quasi-resonant SEPIC converter as example, it analyzing the switching mode of SEPIC converter in detail based on the instance of switches' on-off.

以零 电流开关准谐振 SEPIC 变换器为例，根据开关管的通断情况，详细分析了 SEPIC 变换器的开关模态。

Through the analysis of the work principle of three phases voltage resource PWM converter, set up the low and high mathematic models, deduce the restriction equations about grid voltage, grid current, modulation voltage and the DC output voltage and the calculation equations of the AC-side inductance and the DC-side capacitance. There are two control strategies are adopted: Predicted current control strategy and voltage-current two closed-loop control strategy, and give a comparison by theory and practice.

通过分析三相电压源型PWM变换器的工作原理，分别分析了低频和高频数学模型，并推导出了交流侧电压电流、调制电压、直流侧电压之间的数学约束关系以及交流侧电感和直流支撑电容参数的选取依据公式；分析对比了两种控制策略：预测电流控制和电压电流双闭环控制并加以实验验证；同时采用了负载电流前馈补偿和本文提出的一种基于专家系统的神经元新型智能PI控制器两种方法大大提高了整个系统的动态响应性能，并在仿真和实验中加以验证，这也是本文研究的重点内容之一。

The positive converter makes the load current to be positive in trigging control, while the negative converter is negative.

系统建模在实际确定的导通模式基础上加上两管换流模式和正负换组模式；触发控制中正组变换器使负载输入电流为正，负组变换器使其为负。

Dynamic large-signal, DC, and small-signal circuit models including parasitic resistances and current ripples of nonideal synchronous rectifier buck converter operating in CCM are established. Closed-loop modeling of nonideal synchronous rectifier buck converter for voltage-mode control is studied. Transfer functions are obtained. Effects of parasitic components on control loop design of the converter are explored. Systematic simulation analysis is performed. All the results show that it is necessary to include parasitic components of converters into equivalent models.

首次建立了考虑寄生电阻和电流纹波的同步整流 Buck 变换器在连续工作模式下的大信号平均模型、DC 和小信号电路模型，研究了电压控制的闭环建模，导出了传递函数，剖析了变换器的寄生参数对其控制电路设计的影响，进行了小信号特性的仿真研究，进一步阐明了考虑变换器的寄生参数建模的必要性。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷