In concept, the alternating current through the lamp L can be controlled by the saturation of the iron core with the direct current, regulated by variable resistor R. B- battery, G – AC source.
Saturable reactors provide a very simple means to remotely and proportionally control the AC through a load such as an incandescent lamp; the AC current is roughly proportional to the direct current (DC) through the control winding.
The power windings, the control winding, and the core are arranged so that the control winding is well isolated from the AC power. The AC power windings are also usually configured so that they self-cancel any AC voltage that might otherwise be induced in the control winding.
Because the required inductance to achieve dimming varies with the size of the load, saturable reactors often have multiple taps, allowing a small inductance to be used with a large load or a larger inductance to be used with a smaller load. In this way, the required magnitude of the control current can be kept roughly constant, no matter what the load.
Obsolete technologyedit
Saturable reactors designed for mains (power-line) frequency are larger, heavier, and more expensive than electronic power controllers developed after the introduction of semiconductor electronic components, and have largely been replaced by thyristordimmers using triacs or SCRs.
However, as of 2015, there has been renewed interest in using these devices for control of "smart grids" with multiple current tested installations in California, as well as the United Kingdom.[2]
^Young, Marcus Aaron II, "Saturable Reactor for Power Flow Control in Electric Transmission Systems: Modeling and System Impact Study. " PhD diss., University of Tennessee, 2015. [1] Retrieved on Jun 19 2020.
Referencesedit
Choudhury, D. Roy (2005). Modern Control Engineering. New Delhi: Prentice-Hall of India. ISBN978-81-203-2196-0.
External linksedit
"Saturable-core reactor". Electrical engineering training series. tpub.com. Neets module 08 – Introduction to Amplifiers. 14180.
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saturable, reactor, saturable, reactor, electrical, engineering, special, form, inductor, where, magnetic, core, deliberately, saturated, direct, electric, current, control, winding, once, saturated, inductance, saturable, reactor, drops, dramatically, this, d. A saturable reactor in electrical engineering is a special form of inductor where the magnetic core can be deliberately saturated by a direct electric current in a control winding Once saturated the inductance of the saturable reactor drops dramatically 1 This decreases inductive reactance and allows increased flow of the alternating current AC In concept the alternating current through the lamp L can be controlled by the saturation of the iron core with the direct current regulated by variable resistor R B battery G AC source Contents 1 Design considerations 2 Obsolete technology 3 See also 4 Citations 5 References 6 External linksDesign considerations editSaturable reactors provide a very simple means to remotely and proportionally control the AC through a load such as an incandescent lamp the AC current is roughly proportional to the direct current DC through the control winding The power windings the control winding and the core are arranged so that the control winding is well isolated from the AC power The AC power windings are also usually configured so that they self cancel any AC voltage that might otherwise be induced in the control winding Because the required inductance to achieve dimming varies with the size of the load saturable reactors often have multiple taps allowing a small inductance to be used with a large load or a larger inductance to be used with a smaller load In this way the required magnitude of the control current can be kept roughly constant no matter what the load Obsolete technology editSaturable reactors designed for mains power line frequency are larger heavier and more expensive than electronic power controllers developed after the introduction of semiconductor electronic components and have largely been replaced by thyristor dimmers using triacs or SCRs However as of 2015 there has been renewed interest in using these devices for control of smart grids with multiple current tested installations in California as well as the United Kingdom 2 See also editMagnetic amplifier Constant voltage transformer TransductorCitations edit Choudhury 2005 Section 2 9 1 Young Marcus Aaron II Saturable Reactor for Power Flow Control in Electric Transmission Systems Modeling and System Impact Study PhD diss University of Tennessee 2015 1 Retrieved on Jun 19 2020 References editChoudhury D Roy 2005 Modern Control Engineering New Delhi Prentice Hall of India ISBN 978 81 203 2196 0 External links edit Saturable core reactor Electrical engineering training series tpub com Neets module 08 Introduction to Amplifiers 14180 nbsp This technology related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Saturable reactor amp oldid 1071828940, wikipedia, wiki, book, books, library,
