Quantcast SATURABLE-CORE REACTOR - 14180_135

Share on Google+Share on FacebookShare on LinkedInShare on TwitterShare on DiggShare on Stumble Upon
Custom Search
 
  
 
3-47 Figure 3-31.—Magnetization and permeability curves. You have now seen how a change in the magnetizing force causes a change in permeability. The next question is, how do you change the magnetizing force? Magnetizing force is a function of AMPERE-TURNS. (An ampere-turn is the magnetomotive force developed by 1 ampere of current flowing in a coil of one turn.) If you increase the ampere-turns of a coil, the magnetizing force increases. Since it is not practical to increase the number of turns, the easiest way to accomplish this is to increase the current through the coil. If you increase the current through a coil, you increase the ampere-turns. By increasing the ampere- turns you increase the magnetizing force. At some point, this causes a decrease in the permeability of the core. With the permeability of the core decreased, the inductance of the coil decreases. As said before, a decrease in the inductance causes an increase in power through the load. A device that uses this arrangement is called a SATURABLE-CORE REACTOR or SATURABLE REACTOR. SATURABLE-CORE REACTOR A saturable-core reactor is a magnetic-core reactor (coil) whose reactance is controlled by changing the permeability of the core. The permeability of the core is changed by varying a unidirectional flux (flux in one direction) through the core. Figure 3-32 shows a saturable-core reactor that is used to control the intensity of a lamp. Notice that two coils are wound around a single core. The coil on the left is connected to a rheostat and a battery. This coil is called the control coil because it is part of the control circuit. The coil on the right is connected to a lamp (the load) and an a.c. source. This coil is called the load coil because it is part of the load circuit. As the wiper (the movable connection) of the rheostat is moved toward the right, there is less resistance in the control circuit. With less resistance, the control-circuit current increases. This causes the amount of magnetism in the core to increase and the inductance of the coil in the load circuit to decrease (because the core is common to both coils). With less inductance in the load circuit, load current increases and the lamp gets brighter.


Electrical News
Holiday Movies to Geek Out About
EE Times wants to ensure domestic bliss with a handy...
eetimes.com
Road to Auto Market Paved With Fault-Tolerant SoCs
Data protection and redundancy features implemented across entire SoC designs...
eetimes.com
Boston-Area Engineers to Share Expertise at ESC Boston 2015
In an exciting new session format at ESC Boston 2015,...
eetimes.com
Memory Design Trends in 2014
Memory transitions, increased-density drive design trends: Customers are looking for...
eetimes.com
True 3-D Chips Harness Nanotubes
Stanford University has learned how to stack any number of...
eetimes.com
Top 15 Analog, MEMS & Sensors News From 2014
From faulty MEMS mics to NXP's labor disputes, here are...
eetimes.com
Space Weather Satellite Set for Launch
NOAA's Deep Space Climate Observatory will serve as an early...
eetimes.com
Hackers Go Off-Grid for Power
Hackathon produces designs that could be assembled by villagers with...
eetimes.com
Ten Hot & Cool NASA Innovations
Partnering with industry, NASA has developed new technologies that are...
eetimes.com
The Circle – The Future's Imperfect in the Present Tense
Dystopian novel satirizes mega-Google companies and the modern techie ethos....
eetimes.com
Friday Quiz: S-Parameters
S-Parameters are no longer just for microwave engineers. High-speed digital...
eetimes.com
EEVblog #694 – Mailbag
Mailbag that’s not on a Monday, because Dave has been...
eevblog.com
So Much To Do, So Little Time
2015 will likely be the year of widespread awareness and...
eetimes.com
What Does It Take to Truly Leapfrog With Technology?
In January 2015, Lindsay Craig will be teaching technology workshops...
eetimes.com
Recommended Reads From the Engineer's Bookshelf
Are you wondering what to buy your family and friends...
eetimes.com
Successful With Phones & Drones, Parrot Ponders Farming
Parrot is a 20-year-old startup that has the passion of...
eetimes.com
Power Week: Popular Gaming Consoles' Energy Use Compared
Just in time for the holidays, engineers at the Electric...
eetimes.com
Make This Engineering Museum a Reality
Help turn the first house to have a telephone into...
eetimes.com
Make This Engineering Museum a Reality
Help turn the first house to have a telephone into...
eetimes.com
Industrial IoT Framework Near
The Industrial Internet Consortium plans to finish a reference architecture...
eetimes.com
 


Privacy Statement - Copyright Information. - Contact Us

comments powered by Disqus

Integrated Publishing, Inc.
9438 US Hwy 19N #311 Port Richey, FL 34668

Phone For Parts Inquiries: (727) 755-3260
Google +