zero-voltage造句

• Research on zero - voltage - switched simmering circuit
  零电压开关预燃电源的研究
• By using a modified pwm control method , the two main switches conduct symmetrically and can achieve zero - voltage switching ( zvs ) easily
  主开关管不仅工作在对称状态,而且能很好实现软开关。
• The realization of shift - phase pwm control with zero - voltage and high speed , large power drive circuit is emphatically solved
  重点解决了零电压开关的移相pwm控制策略的实现、高速大功率驱动电路的实现等几个难点问题。
• This thesis focuses on the development of the dc / dc stage , which adopted the phase - shifted zero - voltage - switching ( zvs ) pwm full - bridge converter with two clamping diodes
  本文主要研究单相静止变流器的dc / dc级,它采用加箝位二极管的移相控制zvspwm全桥直流变换器。
• The asi parallel system in this thesis is presented based on common voltage loop control . the system is made up of five paralleled modules based on high - frequency zero - voltage - switch 1kva asi
  本文采用公用电压外环方案，实现了五台1kva基于高频零电压软开关航空静止变流器模块的并联输出。
• On the basis of theory and simulation analysis , the design , execution and experimental study of the phase - shifted zero - voltage and zero - current switching pwm dc / dc full - bridge converter is fulfilled
  在理论和仿真分析的基础上，对新型移相控制zvzcspwmdc dc全桥变换器进行了设计、制作及实验研究。
• First of all , the main - switches of the zvs chopper have zero - voltage turn - on and turn - off totally , so it has little switching losses . for this , the efficiency of the chopper can be improved
  首先,零电压软开关斩波器的主功率器件完全实现了零电压开通和关断,所以它的热损耗很小,减小了系统的热损耗,提高了系统的电源变换效率。
• The active - clamp network is used to clamp the voltage across power switches , and to achieve zero - voltage - turn - on of the power switchs , etc . detailed analysis and simulation of the converter are performed , from which some important results are obtained
  着重介绍了有源箝位zvs软开关电路的特点及其在升压型直直变换器中的应用，并给出了主要的仿真波形。
• The zero - voltage vector , whose function is to keep the output torque unchanged , is applied to a switching table to minish the ripple of the torque and improve the performance of the steady characteristic of the system
  指出了恒定磁链幅值的直接转矩控制系统在轻载稳态时效率不高的缺点。针对这一缺点，提出了根据负载改变磁链幅值的新型直接转矩控制方法。
• In this paper , the operation principle and the equivalent circuit structures in different periods of time of the dual - bridge zero - voltage - switching ( zvs ) bi - directional dc - dc converter are analyzed . the condition of achieving soft - switched is derived
  文中介绍了双向半桥零电压( zvs )变换器的工作原理和不同时间段的等效电路图,以及给出了实现软开关的条件。
• Because the switches suffer only the half of the input voltage , the three - level ( tl ) converters have been attracting more and more attentions . this thesis proposes a family of zero - voltage - switching multi - resonant three - level dc / dc converters
  三电平变换器可以降低开关管的电压应力，并且可以减小输出滤波器(或储能元件)的大小，近年来逐步成为电力电子技术的一个研究热点。
• This paper mainly designs a novel zero - voltage - soft ( zvs ) switching dc / dc chopper and validate on experiment which could be have abroad application in maglev , that is based on the study object of low and middle speed electromagnetic - suspension ( ems ) maglev
  本文以中低速磁悬浮列车为课题研究背景,设计并试验验证了一种可以广泛应用于磁悬浮列车的新型零电压软开关dc / dc斩波器。
• Phase - shifted zero - voltage - switching pwm full bridge converter can realize zvs for the power switches with the use of the leakage inductance of the transformer and the intrinsic capacitors of the power switches , so it is used widely for medium and high power applications
  移相控制零电压开关pwm全桥变换器利用变压器的漏感和开关管的结电容可以实现开关管的零电压开关，在中大功率的场合应用广泛。
• Explicit description of main circuit topology , operation principle , characteristic of the circuit of the novel phase - shifted zero - voltage and zero - current switching pwm dc / dc full - bridge converter as well as the simulation analysis with the pspice software is proposed
  对移相控制zvzcs下pwm的dc dc全桥变换器的拓扑结构、工作原理和电路特性作了深入的阐述，采用pspice软件进行了计算机的仿真分析。
• In this thesis , the tradition phase - shift full - bridge zvs dc / dc converter are analyzed , and then a new dc / dc full - bridge converter employing switches clamping in secondary side of transformer is proposed , and the converter employing saturable inductor clamping are studied , and zvs ( zero - voltage - switching ) can be easily achieve by experiment validate
  本文分析了一些传统的移相全桥软开关变换器，提出了开关管箝位dc dc全桥变换器拓扑方案，并对饱和电感器箝位dc dc全桥变换器进行了研究，并进行实验验证，从而解决了开关管的零电压开关问题。
• Among them , phase shifted ( ps ) full bridge ( fb ) zero - voltage - switched ( zvs ) pulse - width - modulated ( pwm ) dc / dc converter has strong competitive power in big power capacity fields . but it has some limitations such as smaller load range with zvs and larger circulation energy . the ps - fb - zvs - pwm dc / dc converter with a saturable inductor utilizes saturable inductor s critical saturable current characteristic and storage energy , to enlarge load range with zvs and improve output efficiency under light load
  其中，移相控制零电压开关脉宽调制dc / dc全桥变换器在大容量领域很有竞争力，但它具有实现零电压开关负载范围小，循环能量大等限制，带饱和电感的移相控制零电压开关全桥变换器利用饱和电感的临界饱和电流特性及储能，来扩大零电压开关( zvs )的负载范围，提高轻载时的输出效率，具有非常重要的研究价值。
• Full bridge phase - shifted zero - voltage - switched converter ( fbps - zvs converter ) is a successful implementation for soft - switching and is easy for usage in dc / dc converter . the core technique to reach digitalization is dsp technique . in order to reach both high frequency and digitalization of converter , a fbps - zvs converter based on dsp control is proposed in this paper the converter worked on the high frequency of 150k . periphery hardware circuit is simple and its bulk is small . the converter realizes soft - switching over half load and get a high efficiency . it achieves the aim of digital control and error protect
  实现数字化的核心是dsp技术。本文立足于将开关电源的高频化与数字化相结合，具体研究内容为一种基于dsp控制的移相全桥软开关zvs变换器，该变换器工作于较高的开关频率( 150k ) ，外围硬件电路结构简单、器件少、体积小；在半载以上实现了开关管的zvs开关，取得了较高的变换效率；实现数字化控制与故障保护，变换器取得了较好的性能效果。
• As a result , there are some disadvantages for its large size , heavy weight and lower efficiency . in this paper , phase - shifted zero - voltage - switching pwm converter is presented , which is help to ruduce the size and improve the efficiency of inverter . in the later stage , we adopted a pic microcomputer as the control chip , whose low price decreases the price of the inverter
  在逆变环节中，本文采用体积小、功能全、价格便宜而且简单易学的单片机pic16c72作为控制芯片，对前级直流电压进行spwm正弦脉宽调制，从而产生了高质量的正弦输出电压波形，减小了输出电压中的谐波含量。
• By compared with the simulation results and the experiment results , we come to the conclusions that : ( 1 ) circuit with assistant network can widen soft - switching extent in lagging arm , reduces duty - cycle loss on the secondary , diminishes switching dissipation of inverter spot - welding power source . ( 2 ) the range of resonant capacitor , the important factor to soft - switching process , not only affects zero - voltage turn - off of power switches , but also affects the range of zero - voltage turn - on of power switches . so resonant capacitors must be considered according to many aspects ; ( 3 ) it easily fulfils soft - switching condition in lagging arm as leakage inductance of power transformer increases , but bigger leakage inductance of power transformer increases opening dissipation of transformer and decreases efficiency of soft - switching inverter power source
  通过仿真结果与软开关点焊逆变器试验结果的对比分析，得到了如下主要结论：采用辅助网络可以完全拓宽全桥软开关逆变器的滞后桥臂软开关范围，减小了次级占空比丢失，降低了逆变电阻点焊电源的开关损耗；谐振电容是影响软开关工作状态的重要因素，其大小不仅影响开关管的零电压关断，同时也影响开关管的零电压开通范围，因此，谐振电容应该综合考虑；功率变压器漏感越大，越容易满足滞后桥臂的软开关条件，但是大的漏感也使变压器的通态损耗增加，降低了软开关逆变器的效率。
• The design and realization of the switching source charger with phase - shifted zero - voltage - switching converter is discussed particularly , and a distributed system is designed to improve the dependability and expansibility . the nonlinear model about high frequency switching source charger is built and the way of realization of charger control system is analyzed
  详细介绍了全桥移相零电压软开关高频开关电源模块的设计与实现，利用该模块设计了一种分布式充电机系统，提高了系统的可靠性和可扩展性。