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hf circuit
相关语句
  高频线路
     This paper makes a preliminary analysis on the HF(high frequency) transmission of traction network on electrified railways, and derives formulas to calculate parameters and equations for transmission of HF circuit of singleline traction network with a contact network-earth and rail-earth structure, the charateristics curves of attenuation, phase shift and wave impedance frequency are given lastly.
     本文对电气化铁道牵引网高频传输作了初步的理论分析,推导出以接触网—地及钢轨—地为结构的单线牵引网高频线路参数计算式及传输方程式,并求出其衰耗、相移及波阻抗频率特性曲线。
短句来源
  “hf circuit”译为未确定词的双语例句
     HF CIRCUIT MODEL OF CONDUCTED EMI OF GROUND NET BASED ON PEEC
     计及部分电容的接地回路高频电路模型
短句来源
  相似匹配句对
     S, HF.
     S、HF.
短句来源
     Research of HF and HV circuit with Pspice
     借助Pspice对高频高压线路的模拟研究
短句来源
     Research on HF MOSFET Drive Circuit and Parallel Characteristics
     高频功率MOSFET驱动电路及并联特性研究
短句来源
     On the Dynamic Circuit
     动态电路分析的几个问题
短句来源
     FPGA circuit
     FPGA电路设计
短句来源
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  hf circuit
Two three-phase UPS circuits with intermediate HF circuit are also presented, based on the suggested control method.
      
Uninterrupted power supply with intermediate HF circuit
      
The possibility of creating a high-Q (Q ~ 105) superconducting HF circuit mechanically adjustable in a broad frequency range was studied.
      
Because the manual methods were laborious and time consuming, various organizations developed computer programs to analyze HF circuit performance.
      


This paper makes a preliminary analysis on the HF(high frequency) transmission of traction network on electrified railways, and derives formulas to calculate parameters and equations for transmission of HF circuit of singleline traction network with a contact network-earth and rail-earth structure, the charateristics curves of attenuation, phase shift and wave impedance frequency are given lastly. Because of the earth specific conductance and electromagnetic couple among leads being important factors,...

This paper makes a preliminary analysis on the HF(high frequency) transmission of traction network on electrified railways, and derives formulas to calculate parameters and equations for transmission of HF circuit of singleline traction network with a contact network-earth and rail-earth structure, the charateristics curves of attenuation, phase shift and wave impedance frequency are given lastly. Because of the earth specific conductance and electromagnetic couple among leads being important factors, as also due to the asymmetry of circuits, the calculations are rather complicated in the HF analysis of traction network.

本文对电气化铁道牵引网高频传输作了初步的理论分析,推导出以接触网—地及钢轨—地为结构的单线牵引网高频线路参数计算式及传输方程式,并求出其衰耗、相移及波阻抗频率特性曲线。在牵引网高频分析中,大地电导率、导线间的电磁耦合成为重要因素,同时线路又是非对称性的,故使计算较复杂。

This paper introduces a new type HF arc starter which is well compatible with the invertersfor arc welding. The principles of the starter and the factors offecting the arc starting HF intensity and itsadjustment have been analysised in the paper. The arc igniation tests show that the starter has theadvantages of ease of arc igniation, convenience of controll and adjustment and the no touch cut-off of HF circuit.

本文介绍一种能与弧焊逆变器良好兼容的新型高频引弧装置。文中分析了该引弧器的原理以及影响引弧高频强度的因素及其调节。试验结果表明,该装置引弧容易,控制调节方便,并实现了高频主电路的无触点切断。

Single chip computer is a widely used device in recent years.It has quite powerful control capability.This paper presents an introduction on how to make a numerically controlled attenuator according to the principle of HF circuit impedance match,the control skill of single chip computer and the use of micro relay.This numerical control attenuator designs the size of the attenuation by a 4×4 digital keyboard and provides the digital display of the attenuator.It also possesses many advantages,such as small...

Single chip computer is a widely used device in recent years.It has quite powerful control capability.This paper presents an introduction on how to make a numerically controlled attenuator according to the principle of HF circuit impedance match,the control skill of single chip computer and the use of micro relay.This numerical control attenuator designs the size of the attenuation by a 4×4 digital keyboard and provides the digital display of the attenuator.It also possesses many advantages,such as small volume,high work frequency,strong function,convenient operation,and wide applicability use.Its main technical specifications are as follows:frequence scale 0~ 1 GHz,attenuation scale 0~120 dB,characteristical impendance 50 Ω,encamped wave coefficient 1.2~1.4, attencation error ≤1%,maximum inport voltaqe 5 V.

根据高频电路阻抗匹配的原则 ,利用微型真空继电器和贴片电阻网络以及单片机控制技术 ,设计和制作了一种数码控制的衰减器 ,它通过一个 4× 4的数字键盘对衰减量的大小进行设置 ,并可提供衰减量的数字显示 ,具有体积小、工作频率高、可靠性好、功能强、操作方便、适用面广等优点

 
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