💯
University Notes
  • Introduction
  • High Level Math
    • Function, limitation, and continuity
      • What is function?
      • Two kinds of infinity
      • The limitation of a function
      • A model for getting limitation
    • Derivative and differential
      • Formulas of derivative
      • Use derivative formula
      • Goes deeper
      • Use derivative
        • Function analyzing in theory
          • First derivative
          • Second derivative
          • Domain and Extreme Value
          • Overall change
        • Derivative use in reality
    • Integration
      • Indefinite integral
        • Basic formulas
        • Use formula
        • Goes deeper
        • Integration by parts
      • Definite integral
        • Properties of definite integral
        • Second fundamental theorem of calculus
        • Multi-method for solving definite integral
    • Multivariable calculus
      • Limitation
      • Partial derivatives
      • Differential
      • Multiple integral
    • Series
    • Linear algebra
    • GaoKao
      • 1
      • The road for starting
      • Polar Coordinates
      • Tangent Line
  • Electrical Engineering
    • The Terminologys
    • DC
      • The circuit rule
      • KCL and KVL
      • Superposition
    • AC
      • Intuition
      • Resistor
      • Inductor
      • Capacitor
      • AC circuit
      • 三相电
        • 星形联结
        • 三角形联结
        • 实际电路
    • Voltage and Current Rule in Circuit
    • Response
      • Foundations
      • 零输入响应
      • 零状态响应
      • 一阶电路的全响应
  • Analog Electronics
    • Technical terms 1
    • DC stable source circuit 的分析与应用
      • 二极管的特性与应用
        • 半导体
        • PN junction
        • Diode
        • 测试二极管
      • 整流滤波电路的分析与应用
        • Rectifier circuit
      • 直流稳压电路的分析
        • Zener diode
        • Shunt voltage regulators
    • Thyristor
    • Technical terms 2
    • Amplifying circuit
      • Bipolar Junction Transistor
      • Common Emitter Configuration
      • Biasing
      • Analysis
      • Mess
      • Negative-feedback amplifier
      • Integrated Operational Amplifier
    • Algorithms
      • What's the ouput of a voltage rectifier circuit
      • PNP or NPN
      • Judging the state of a BJT
      • What's common in BJT
      • Does a amplifying circuit normal
      • What's the feedback type
      • What kind of distortion you are encounter
  • Digital Electronic Technology
    • Logic Gate
    • Logic expressions
    • Karnaugh map
    • Number system
    • Multiplexer
    • Flip-flop
  • Principles of Communications
    • Overviews
    • PCM
    • HDB3
    • Modulations
    • Cyclic code
  • Data Communications and Networking
    • Something about IPv4
  • Micro Control System 51 Series
    • The Delay function
    • The Interrupt function
  • Maintenance of Railway Optical Cable Lines
    • Questions
    • Pictures
  • Mobile Communications
    • Concepts
    • Coding and Modulation
    • Key Technologies
    • Mobile communication network structure
    • Radio wave Propagation and Interference
    • GSM
    • CDMA
    • GPRS
    • 3G
    • 4G
    • Base Station Maintenance
  • Multimedia Communication
    • Concept of Multimedia
    • Compression
    • Lossless Compression
    • Audio
    • Lossy Audio Coding
    • Graph Compression
    • All for the exam
  • Power system for Communication Devices
    • Overview
    • AC power Distribution Panel
    • UPS
    • HF Switched-mode Power Supply
    • Battery
    • Earthing or Use Lightning Arrester
    • Power Supply Monitoring System
    • All for the exam
  • Optical fiber Communication system
    • What is Optical fiber Communication system
      • Prepare
      • Something About Optical fiber
      • Passive Optical Devices
      • Active Optical Devices
      • Optical transmitter Test
      • Optical receiver Test
      • Compose an Optical Communication System
    • SDH (Synchronous Digital Hierarchy)
      • Frame Structure of SDH
      • SDH Equipments
      • Clock System
      • ZXONM E300 Practice
      • SDH protection
    • WDM (Wavelength-Division Multiplexing)
    • OTN (Optical Transport Network)
      • OverHead of OTN
      • OTN Alarms & Errors
      • Do it again, what's happened?
  • Communication Tech English
    • Fundamentals of Electricity
    • Digital Communications
    • Optical Communications
  • High-speed railway Communication Technology
    • Overview
    • Base Knowledge
    • FH98
    • MDS3400
    • Everything is for the exam
  • GSM for Railway
    • Overview
    • Wired Parts
    • Digital dispatch Communication System
    • Basic Knowledge of GSM-R
    • Key technologies for GSM-R
    • Structure of GSM-R
    • GSM-R Network Mode
    • Wireless Channels for GSM-R
    • Mobility Management
    • Connection Management
    • Security Management
    • GPRS
    • GSM-R/GPRS Wireless Access Platform
    • GSM-R Features
    • GSM-R Numbering Plan
    • ASCI
  • Network Configuration Training
    • Words I have learned
  • Broadband Access Technology
    • Using Copper Line
    • Using Optical Fiber
    • Wireless
    • All for the test
  • CIR
    • Basci Knowledge
    • Testing Equipment
    • The Structure of CIR
    • All for the exam
  • LTE
  • Script for ChaoXing
  • Transmission and access network
Powered by GitBook
On this page
  • 直流的配电方式
  • 低电阻配电: 粗电线,电阻小
  • 高阻配电: 细电线,电阻大
  • 直流配电作用
  • 高频开关整流器
  • 主电路
  • 电子器件
  • 整流电路的分类
  • 稳压原理

Was this helpful?

  1. Power system for Communication Devices

HF Switched-mode Power Supply

PreviousUPSNextBattery

Last updated 5 years ago

Was this helpful?

A switched-mode power supply is an electronic power supply that incorporates a switching regulator to convert electrical power efficiently. Like other power supplies, an SMPS transfers power from a DC or AC source (often mains power) to DC loads.

  • 防雷器并联。雷击产生大电流时电阻变小,导电到大地。

  • 虽然整个系统输入380V三相电,整流模块却只用了一相220V

  • 整流模块输出 48V (但我们想要-48V 给负载,所以要将正极接地来产生负电流)

  • 这个系统的负载需要接到负极,因为正极接了地

  • 接触器上的分流器在这里被用来测电压值。从而可以根据公式推导出电流值

  • LVD(Low Voltage Disconnect): 低压脱离装置,低压时保护电池; 或者可用来 根据设备的重要程度依次断电

直流的配电方式

低电阻配电: 粗电线,电阻小

优点: 电阻小,线路损耗、压降小

缺点: 某一负载短路后,会使直流瞬间增大,损坏设备

高阻配电: 细电线,电阻大

优点: 克服低阻配电短路 事故的影响

缺点: 电阻大,线路损耗大

直流配电作用

  • 测量

  • 报警

  • 保护

高频开关整流器

整流器的作用: 交流变直流

逆变器的作用: 直流变交流

主电路

  1. 交流输入滤波

  2. 整流滤波

  3. 功率因数校正

  4. 逆变

  5. 输出整流滤波

为什么这里把交流到直流这个过程搞了两次?是为了更加稳定的直流输出

电子器件

  1. 不可控: 比如二极管

  2. 可控(全控): 如多一个控制输入接口的二极管

  3. 半控: 把上面两个设备搞在一个电路上,如此一来你可以用多一个控制输入接口的二极管控制普通二极管

整流电路的分类

稳压原理

因为要保证输出直流的超级稳定,所以这里要用稳压器

1. 线性稳压

  • 优点: 因为有差分放大器,调节灵敏,稳压效果特别好

  • 缺点: 三极管(调整管)上的损耗功率大,稳压效率低

2. 开关型稳压

  • 通过调整输入电的“有无比例”,来减少调整管的功率损耗

  • 电感L在调整管停工时放电 (放电时正负极会反向)

  • 电容C被用来滤波(过滤谐波)