zero current造句
例句与造句
- Occurred . it was suggested that the two levels of plateau were based on the two zero current point in
样电流。当电压钳制在- 55mv时，出现的内向电流与 - In chapter 5 , the controller of resonant converter designed by myself , was introduced , in which zero current switching ( zcs ) had been realized
第五章介绍了自行设计的适合于不同谐振频率的谐振变换器的控制器，实现了变换器的软开关技术。 - This paper analyses the test results gained by mixed simulation , and validates the reliability of the use of transient zero current and negative current in fault identifying
文中讨论了负序电流的分布及提取问题，试验数据同样表明负序电流用于单相接地故障识别是可行性的。 - This paper discusses the size of transient zero current and the method of analyzing it . numeral simulation shows the feasibility of it . negative current at fault line is differ distinctly from non - fault line
文中讨论了零序电流暂态分量的大小和提取方法，对数字仿真和混合仿真试验数据进行分析，结果表明零序电流暂态分量用于单相接地故障识别是可行性的。 - 2 . we present a novel de - rail parallel resonant zero voltage transition three - phase pwm voltage - source inverter which is based on resonant zero voltage ( zero current ) transition technique ; at the same time it ' s efficiency analysis and simulation result are presented . 3
把谐振过渡软开关技术应用于直流环节逆变器得到了一种新的谐振过渡软开关逆变器；论文对该新型谐振过渡软开关逆变器进行了工作原理、效率分析并对主电路进行了仿真。 - It's difficult to find zero current in a sentence. 用zero current造句挺难的
- All the power devices including main switches and auxiliary switches are in soft - switching condition ( zvs or zcs ) , while the freewheeling diodes are turned off in zero current condition . besides , the control of resonance between inductance and capacitor can be easily realized without needing of setting the threshold values of the inductance current
该电路中主开关和辅助开关均满足zvs或zcs条件，续流二极管也工作在软关断方式，并且电感和电容之间的谐振控制不需要设定电感电流阈值，控制逻辑简单，可实现四象限运行。 - The principle and application of zero current switching boost pfc circuit are given . by introducing the development of ac / dc module with pfc the key techniques of the module are stressed on the engineering design . some problems are resolved such as the module is so small that spread the hot difficulty
从理论上分析和研究了零电流开关升压式pfc电路的原理和应用，并结合250w带pfc电路ac dc模块的研制，从工程设计角度重点阐述了该模块的关键技术，解决了模块体积小、散热困难及工艺等方面的难题。 - Discussion is made on photocurrent output , injection current output and zero current output for photoreceiving pn junction by means of i - v equation of photoreceiving pn junction . further survey is carried out on physical elements of the injection photodetector followed by description of some experiment subjects
本文推导金属球的雷达散射截面,同时讨论金属球散射的三个区域,金属球本身是一个良好的雷达目标,同时又是测量目标雷达截面的参考标准,因此还研究了金属球的尺寸、导电性能和球壳的厚度,给出了测量结果 - Conventional hard switching technology has several flaws below : on and off loss , inductive off , capacitive on and diode recover problems . comparing with it , the loss of on and off decreases markedly , as the switches are on and off in zero voltage or zero current cases . and also the size of converter becomes smaller because of the higher of switching frequency
传统硬开关技术由于存在开通关断损耗大、感性关断、容性开通、二极管反向恢复等问题,与之相比,软开关技术在零电压或零电流条件下导通,开关损耗明显降低,加上开关频率的提高使得变换器的体积得以减小,这也是软开关技术受到青睐的原因。 - When the motorcycle is braking or slowing down , the kinetic and / or potential energy is fed back to the battery , so the running distance can be extended and the energy efficiency is improved . an asynchronous motor is employed in this new system which can overcome the traditional dc drive system bugs and to reduce the cost and maintenance . in addition , the switches of dc / dc converter switch under zero current and zero voltage conditions , which can also reduce the switch losses , electro magnetic interference ( emi ) and prolong its life
该系统在功能上实现了车辆刹车减速或下坡制动时能量的回馈，达到节能、提高能量使用效率和增加车辆行驶距离的目的；采用交流异步电机，克服了传统直流驱动系统的诸多缺陷，降低了成本，减少了维护；采用zczvs技术，降低了电磁干扰和损耗，提高了效率；另外，在逆变主电路中采用ipm模块，简化了系统结构，节约了空间，提高了整个系统的可靠性和经济性。 - The problem is much more critical when the inverter frequency is high . in a welding machine , the main circuit with the technology of the soft - switching is much idealer than the hard - switching . firstly of all , by the theory of the soft - switching , this paper relatively analysis the advantages of the soft - switching and , with the help of the simulation software pspice , analyzes the main circuit of the full bridge shift - phased zero voltage zero current ( zvzcs ) soft - switching
结合软开关实现原理,本文首先对比分析了软开关在提高效率、降低emi干扰等方面的技术优势,通过pspice软件仿真,分析研究了全桥移相零电压零电流( zerovoltagezerocurrent - - - - zvzcs )软开关电路,详细介绍了该电路的软开关实现过程,并给出了电路模型和关键元件的设计参数。 - About the transducer between rotor and power source , the paper uses a cycloconverters , comprising 36 thyristors , and analyzes the control of circumfluence , the method of cosine crossing , the producing of trigger pulse , zero current detecting , commutating logic control and its mathematical model
对双馈电机转子侧所接变频器类型，本文也进行了对比分析，对选用的循环变流器的原理还作了进一步的分析，包括环流控制方法、余弦交截法原理、触发脉冲产生、零电流检测和换向逻辑控制等部分，并给出了其数学模型。 - Serial - parallel combined two - transistor forward converter is presented for high input voltage and high power application , and the operation principle of the topology is analyzed in this paper . all switches are turned off with zero voltage switching , and the two switches of them are turned on with zero current and zero voltage switching . the difference of input capacitances , conducting voltage drop of switches , duty cycle and windings of the transformer of the combined converter influences the voltage balance of the input capacitors
本文介绍了双管正激变换器的两种稳定工作状态，详细分析了带lcd无损箝位网络的并?并组合式双管正激变换器的工作原理，该组合式变换器中的开关管实现了零电压关断，并介绍了该电路拓扑的特点和lcd网络参数设计，采用pspice软件进行了仿真和分析，最后，研制出一台2 . 3kw样机。 - It combines feeder automation , and develops the fault identifying principle from one direction to two direction . so it enhances the redundancy of fault information , and improves the reliability of the fault location . we choose the transient zero current prior to others , for it is bigger than others mostly
本文叙述了馈线系统保护原理，提出了基于馈线自动化系统的几种单相接地故障处理方案，讨论了这几种方案下故障特征量的比较方式，分析了故障特征量选用的出发点以及配电终端地址命名规则等问题。 - " soft switching " is zero voltage switching or zero current switching , which the voltage ( or current ) of the switch varies by law of sine or quasi sine , the switch is on when its voltage reaches zero ( or switch is off when its current reaches zero ) by resonance . it makes switch loss is zero , so it can increase the operating frequency and raise power density , minimize the size of transformer and inductor
“软开关”是指零电压开关或零电流开关，它是利用谐振原理，使开关变换器的开关管电压(或电流)按正弦(或准正弦)规律变化，当电压过零时，使器件开通(或电流自然过零时，使器件关断) ，实现开关损耗为零，从而提高开关频率，减小变压器、电感的体积。