Ben Tongue`s Web Book on Crystal Radio Systems Volume II
... low loss RF and AF impedance matching will be a problem. At input signal levels at or below the Plsc(i) point, those values are about: Ri = Ro = 0.00008614*n*Kt/Is ohms. The example in Figs. 2 and 3 are for a case where Ri and Ro are both about 700k ohms, using a diode with an Is of 38 nA and an n o ...
... low loss RF and AF impedance matching will be a problem. At input signal levels at or below the Plsc(i) point, those values are about: Ri = Ro = 0.00008614*n*Kt/Is ohms. The example in Figs. 2 and 3 are for a case where Ri and Ro are both about 700k ohms, using a diode with an Is of 38 nA and an n o ...
9. lightning protection for wind turbine installations
... In particular the blades are subject to catastrophic damage, and because of both material and installation costs, any damage to the blades is expensive. A significant other area of damage or disruprions is where lightning affects electrical systems and control circuitry. Statistics shorithat lightni ...
... In particular the blades are subject to catastrophic damage, and because of both material and installation costs, any damage to the blades is expensive. A significant other area of damage or disruprions is where lightning affects electrical systems and control circuitry. Statistics shorithat lightni ...
near field measuring - Interference Technology
... LF-R 50 The near field probe has a higher resolution and a lower sensitivity than the R 400-1. It is suitable for measurements up to 3 cm. Interference sources can be localised by detecting the distribution and orientation of the field, therefore enabling a more exact use of higher resolution probes ...
... LF-R 50 The near field probe has a higher resolution and a lower sensitivity than the R 400-1. It is suitable for measurements up to 3 cm. Interference sources can be localised by detecting the distribution and orientation of the field, therefore enabling a more exact use of higher resolution probes ...
Mode Transitions in Hall-Effect Thrusters Induced by
... significant experimental and flight histories. Mode transitions have been commonly observed throughout their development as noted by some of the early pioneering Russian research [2]. HETs have several parameters that define a single operating point, such as discharge voltage, magnetic field strengt ...
... significant experimental and flight histories. Mode transitions have been commonly observed throughout their development as noted by some of the early pioneering Russian research [2]. HETs have several parameters that define a single operating point, such as discharge voltage, magnetic field strengt ...
US ARMY ENGINEER SCHOOL
... Many devices have wiring holes to speed up the installation of conductors. This procedure is called back feeding or back wiring. When troubleshooting, examine the wiring holes for loose or poor connections. Wiring holes are used with solid wire only; good connections are not made with stranded wires ...
... Many devices have wiring holes to speed up the installation of conductors. This procedure is called back feeding or back wiring. When troubleshooting, examine the wiring holes for loose or poor connections. Wiring holes are used with solid wire only; good connections are not made with stranded wires ...
Tests to determine short characteristics of GlueX Solenoid coils one
... Helium Head tank large enough so that the solenoid can safely be discharged with no more than the charging voltage of 10 volts which is a 3960 second slow dump. A passive slow dump that works in the event of a total power failure must be installed. The vulnerability of vapor cooled current leads (VC ...
... Helium Head tank large enough so that the solenoid can safely be discharged with no more than the charging voltage of 10 volts which is a 3960 second slow dump. A passive slow dump that works in the event of a total power failure must be installed. The vulnerability of vapor cooled current leads (VC ...
IPC-2292 Master Working Draft -
... usually including several design concepts that could solve the problem. These design concepts are functionally block diagrammed and, as with any trade-off, a set of advantages and disadvantages is formulated and evaluated by the designer to make his decision on which solution is optimal for this des ...
... usually including several design concepts that could solve the problem. These design concepts are functionally block diagrammed and, as with any trade-off, a set of advantages and disadvantages is formulated and evaluated by the designer to make his decision on which solution is optimal for this des ...
Chapter2 - Free-Energy-Info
... Note: If you are not at all familiar with basic electronics, you might find it easier to understand this chapter if you read chapter 12 first. ...
... Note: If you are not at all familiar with basic electronics, you might find it easier to understand this chapter if you read chapter 12 first. ...
Balun Project
... and the 1” choke balun illustrated above. The 1” core outperforms the 2.4” core. However, the power dissipation of the smaller core is much less. The smaller core would be more comparable at about 5 turns instead of 7. I am not sure how much power the 2.4” core will dissipate without overheating, bu ...
... and the 1” choke balun illustrated above. The 1” core outperforms the 2.4” core. However, the power dissipation of the smaller core is much less. The smaller core would be more comparable at about 5 turns instead of 7. I am not sure how much power the 2.4” core will dissipate without overheating, bu ...
ABB circuit-breakers for direct current applications
... make direct current supply a good solution for railway and underground systems, trams, lifts and other transport means. In addition, direct current is used in conversion plants (installations where different types of energy are converted into electrical direct energy, e.g. photovoltaic plants) and, ...
... make direct current supply a good solution for railway and underground systems, trams, lifts and other transport means. In addition, direct current is used in conversion plants (installations where different types of energy are converted into electrical direct energy, e.g. photovoltaic plants) and, ...
DC Generators and Motors
... to rings called SLIP RINGS. They rotate with the armature. The brushes, usually made of carbon, with wires attached to them, ride against the rings. The generated voltage appears across these brushes. The elementary generator produces a voltage in the following manner (fig. 1-3). The armature loop i ...
... to rings called SLIP RINGS. They rotate with the armature. The brushes, usually made of carbon, with wires attached to them, ride against the rings. The generated voltage appears across these brushes. The elementary generator produces a voltage in the following manner (fig. 1-3). The armature loop i ...
[PDF
... Where Ke is the proportionality constant and core losses per mass unit are Q = (kHy f + k Ft f 2) B2max ...
... Where Ke is the proportionality constant and core losses per mass unit are Q = (kHy f + k Ft f 2) B2max ...
Relaying Current Transformer Application
... given burden may apply only for a particular value of current. If a publication does not clearly state for what value of current the burden applies, this information should be requested. At high saturation, the burden impedance approaches its DC resistance. This effect is exploited in highimpedance ...
... given burden may apply only for a particular value of current. If a publication does not clearly state for what value of current the burden applies, this information should be requested. At high saturation, the burden impedance approaches its DC resistance. This effect is exploited in highimpedance ...
Fuse Sizing Guide - OMEGA Engineering
... It may be confusing that most industry references to shortcircuit current and short-circuit ratings are in “RMS symmetrical amperes” (Irms), but this is for convenience and common understanding that the “worse case” requirements imposed by “asymmetrical” values are “built-in” for U.L. testing. Figur ...
... It may be confusing that most industry references to shortcircuit current and short-circuit ratings are in “RMS symmetrical amperes” (Irms), but this is for convenience and common understanding that the “worse case” requirements imposed by “asymmetrical” values are “built-in” for U.L. testing. Figur ...
Chapter 4
... As you correct your answers, evaluate your progress. Create a Know Chart with 2 columns. Place correct answers from the Self-Check under the “I Know” column. Then place incorrect answers under the “I Need to Study” column. ...
... As you correct your answers, evaluate your progress. Create a Know Chart with 2 columns. Place correct answers from the Self-Check under the “I Know” column. Then place incorrect answers under the “I Need to Study” column. ...
Skin effect
Skin effect is the tendency of an alternating electric current (AC) to become distributed within a conductor such that the current density is largest near the surface of the conductor, and decreases with greater depths in the conductor. The electric current flows mainly at the ""skin"" of the conductor, between the outer surface and a level called the skin depth. The skin effect causes the effective resistance of the conductor to increase at higher frequencies where the skin depth is smaller, thus reducing the effective cross-section of the conductor. The skin effect is due to opposing eddy currents induced by the changing magnetic field resulting from the alternating current. At 60 Hz in copper, the skin depth is about 8.5 mm. At high frequencies the skin depth becomes much smaller. Increased AC resistance due to the skin effect can be mitigated by using specially woven litz wire. Because the interior of a large conductor carries so little of the current, tubular conductors such as pipe can be used to save weight and cost.