105 lines
3.5 KiB
Markdown
105 lines
3.5 KiB
Markdown
+++
|
||
title = "Grounding and shielding: circuits and interference"
|
||
author = ["Thomas Dehaeze"]
|
||
draft = false
|
||
+++
|
||
|
||
Tags
|
||
:
|
||
|
||
|
||
Reference
|
||
: ([Morrison 2016](#org7039b1d))
|
||
|
||
Author(s)
|
||
: Morrison, R.
|
||
|
||
Year
|
||
: 2016
|
||
|
||
|
||
## Voltage and Capacitors {#voltage-and-capacitors}
|
||
|
||
<div class="sum">
|
||
<div></div>
|
||
|
||
This first chapter described the electric field that is basic to all electrical activity.
|
||
The electric or \\(E\\) field represents forces between charges.
|
||
The basic charge is the electron.
|
||
When charges are placed on conductive surfaces, these forces move the charges to positions that store the least potential energy.
|
||
This energy is stored in an electric field.
|
||
The work required to move a unit of charge between two points in this field is the voltage between those two points.
|
||
|
||
Capacitors are conductor geometries used to store electric field energy.
|
||
The ability to store energy is enhanced by using dielectrics.
|
||
It is convenient to use two measures of the electric field.
|
||
The field that is created by charges is called the \\(D\\) field and the field that results in forces is the \\(E\\) field.
|
||
A changing \\(D\\) field represents a displacement current in space.
|
||
This changing current has an associated magnetic field.
|
||
This displacement current flows when charges are added or removed from the plates of a capacitor.
|
||
|
||
</div>
|
||
|
||
|
||
### Introduction {#introduction}
|
||
|
||
<a id="org40e5e37"></a>
|
||
|
||
{{< figure src="/ox-hugo/morrison16_field_conf.png" caption="Figure 1: Field configurations around a shieded conductor" >}}
|
||
|
||
|
||
## Magnetics {#magnetics}
|
||
|
||
<div class="sum">
|
||
<div></div>
|
||
|
||
This chapter discusses magnetic fields.
|
||
As in the electric field, there are two measures of the same magnetic field.
|
||
The \\(H\\) field is the direct result of current flow.
|
||
The \\(B\\) field is the force of induction field that operates motors and transformers.
|
||
As in the electric field, the magnetic field is represented by field lines.
|
||
The \\(B\\) field lines are continuous and form closed curves.
|
||
The \\(H\\) field flux lines follow the \\(B\\) field lines but change intensity depending on the permeability of the material in the magnetic path.
|
||
|
||
In this chapter, the movement of electrical energy into inductors or across transformers is discussed.
|
||
This extends the ideas that both fields are need to move energy.
|
||
Both electric and magnetic fields are need in transformers action or to place energy into an inductor.
|
||
It will be shown that iron cores in transformers reduce the magnetizing current so that transformer action is practical at power frequencies.
|
||
The idea that a changing electric field creates both a displacement current and a magnetic field discussed in Chapter 1.
|
||
In this chapter, it is shown that a changing magnetic field produces both an electric field and voltages.
|
||
Both fields must be in transition before an electrical energy can be moved.
|
||
|
||
</div>
|
||
|
||
|
||
## Digital Electronics {#digital-electronics}
|
||
|
||
|
||
### 3.1. Introduction {#3-dot-1-dot-introduction}
|
||
|
||
|
||
### 3.2. The Transport of Electrical Energy {#3-dot-2-dot-the-transport-of-electrical-energy}
|
||
|
||
|
||
### 3.3. Transmission Lines–Introduction {#3-dot-3-dot-transmission-lines-introduction}
|
||
|
||
|
||
### 3.4. Transmission Line Operations {#3-dot-4-dot-transmission-line-operations}
|
||
|
||
|
||
## Analog Circuits {#analog-circuits}
|
||
|
||
|
||
## Utility Power and Facility Grounding {#utility-power-and-facility-grounding}
|
||
|
||
|
||
## Radiation {#radiation}
|
||
|
||
|
||
## Shielding from Radiation {#shielding-from-radiation}
|
||
|
||
|
||
## Bibliography {#bibliography}
|
||
|
||
<a id="org7039b1d"></a>Morrison, Ralph. 2016. _Grounding and Shielding: Circuits and Interference_. John Wiley & Sons.
|