对数字pwm逆变器两电平结构的数学模型进行了分析。
Model of digital PWM inverter with two-level structure is analyzed.
采用三电平拓扑的两电平输出模式，提高了加热效率，简化了控制方案。
For improving the efficiency and simplifying the control strategy, the paper USES the method of two level output in three level topology.
在主电路拓扑结构的选择过程中，对多电平结构和两电平结构的优缺点分别进行了比较。
While choosing topological structure of primary circuit, merits as well as demerits of multi-level and two-level structure are evaluated.
传统两电平脉宽调制电磁轴承开关功放的电流纹波较大，导致电磁轴承中产生的纹波损耗较大。
Different from conventional two-level PWM switching power amplifier, the switching power amplifier can achieve current ripple reduction.
运用“幂和理论”，提出一种两电平SHEPWM非线性超越方程组求解算法，可显著降低运算量。
By use of power sums theory, an algorithm to solve two-level SHEPWM nonlinear transcendental equations is put forward which can reduce computational burden greatly.
通过对传统使用的两电平逆变器的损耗分布进行计算和验证，分析了进一步提升逆变器效率的途径。
According to the loss calculation and verification results, the way to further increase inverter's efficiency is analyzed.
采用DSP2407控制器、基于标幺值法及电流解耦控制完成了三相两电平PWM整流电源的研制。
DSP2407 controller is adopted to complete the research & development of three-phase PWM rectifier based on the per unit system and the current decoupled control.
在分析单相两电平和三电平四象限变流器工作原理的基础上，建立了基于理想开关函数的数学模型，介绍了其SPWM调制原理。
Based on analyzing single phase two-level and three-level 4-quadrant converter's principle, the mathematic model of ideal switch function is established, the principle of SPWM is introduced.
通过三电平拓扑和传统两电平拓扑电路的对比分析，得出了相同先决条件下这两种拓扑中开关管电压应力和电感电流可减小的幅度。
By analyzing the current ripple of the inductor and voltage stress of switches at the same conditions, the reduced value of the current ripple and voltage stress with three-level topology can be got.
三电平桥臂的开关管的电压应力为输入电压的一半，可在宽负载范围内实现零电压开关；两电平桥臂的开关管的电压应力为输入电压，它们利用变压器的漏感来实现零电压开关；
The voltage stress of the switches of the three-level leg is the half of the input voltage, and the switches can realize ZVS in a wide load range.
显见，动态阈是用准峰值电平表示，而信噪比则是用准平均值电平表示的，两者的区别是显而易见的了。
Obviously, the dynamic threshold is to use quasi-peak level that, while the signal to noise ratio is expressed with the quasi-average levels, and the difference is obvious in.
针对三电平逆变器固有的中点电位平衡问题，本文提出并分析了两种能控制中点电位平衡的控制策略。
Two methods to control the neutral point potential are proposed in this thesis which can solve the neutral point potential problem owned by three-level inverter.
总线空闲时，两条线都是高电平(集电极开路)。
The bus is "idle" when both lines are high (open-collector).
因此，将STS - SVM技术应用于级联型多电平变流器，就可以更加充分地发挥两者的优势。
Thus, if the STS-SVM can be employed in cascade multi-level converters, the advantages of STS-SVM and cascade multilevel converters will be put forth more sufficiently.
本文从理论和实验两方面研究了级联型多电平变流器及CPS - SPWM控制策略在有源电力滤波器中的应用。
In this paper, the cascade multilevel converter based on CPS-SPWM and its application to Active Power Filter has been deeply studied in theory and practice.
一个有两个工作状态的电路或设备处于高电平状态或经常活动状态的时间百分比。
The percentage of time that a circuit or device with two operational states is in the higher level or more active state.
重点分析了接收机灵敏度和系统电平余量这两项指标。
In this article, receiver sensitivity and system electrical level allowance are analyzed.
此门阵列采用的BFL预功能级标准逻辑单元，具有九种组合逻辑功能及两种不同选择的驱动能力，并具有输出电平调节功能。
The pre-functional cell of standard buffered FET logic (BFL) adopted by the gate array possesses nine logic functions, two different kinds of driving capabilities, and the level control ability.
为降低比特率，本文提出四种有效的BTC算法，以降低对每个图像块的两个量化电平和位平面编码所需的比特数。
In order to reduce the bit rate, on the one hand, simple look-up-table methods are presented to code the BTC quantized data of a block.
本文提出了适合于该方向的两类多电平拓扑，并对它们的生成方法和工作原理进行了研究。
Two types of multilevel converter topologies are proposed for this direction, and their constructing rules and principles are researched.
该电路应用两级差动放大增加电路增益，利用源极跟随器作为电压缓冲器以减少信号电平损失。
It uses tow-stage differential amplifiuers to increasee the circuit gain and uses a source follower as a voltage buffer to decrease signal volt- age losing.
它可根据两支路信号电平之比值来自适应地或是工作于等增益合并模式，或是工作于选择分集模式。
It can work in ei - ther an equal-gain combining mode or a selection mode adaptively according to the ratio between the signal levels in the two branches.
此序列由16个固定宽度的高电平脉冲组成，两个相邻脉冲之间的低电平时间间隔是由伪随机数序列决定的。
The PRFM pulse sequence is composed by 16 fixed-width and fixed-amplitude short pulses, in which the duration between two neighboring pulses is determined by pseudo-random number sequence.
在8 2B型计算机实验台设计制作出一套计算机时标实验系统，包括四相节拍电平及两相工作脉冲，利用此时标系统可组合出计算机所需要的各种时序信。
Design and make a set of computer time scale experiment system on 82B Lab desk, include four phase time eletronic level and two phase working pulse.
两个可变电阻的中心控制电机转速和触发电平。
The two variable resistors in the center are for controlling motor speed and trigger level.
在自适应波束形成技术抑制干扰问题中，当存在主瓣干扰时，便暴露出两个缺陷：一是副瓣电平增高；
There are two disadvantages in adaptive beam forming in the presence of main lobe interference, one is heightening of side-lobe level, the other is distortion and peak offset of main beam.
最后讨论了对于差波束两个切面旁瓣电平的优化的问题。
Finally discussion is on how to optimize sidelobe level of the two sections of difference beam.
这两个器件决定Q 1什么时候导通，从而为输出提供保持时间可调的高电平。
These two components determine when Q1 turns on and thus provide an adjustable hold time for the output to hold high.
文章对三电平逆变器输出中的共模电压进行了分析，为了减小共模电压带来的危害，文中采用了两种SPWM控制策略即传统三电平SPWM控制策略和降低共模电压的三电平SPWM控制策略。
The common mode voltage for the output of three-level inverter is analyzed. To diminish the harm caused by the common mode voltage, two control strategies of SPWM are adopted.
文章对三电平逆变器输出中的共模电压进行了分析，为了减小共模电压带来的危害，文中采用了两种SPWM控制策略即传统三电平SPWM控制策略和降低共模电压的三电平SPWM控制策略。
The common mode voltage for the output of three-level inverter is analyzed. To diminish the harm caused by the common mode voltage, two control strategies of SPWM are adopted.
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