winding
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+ | ====== Winding ====== | ||
+ | |< 100% >| | ||
+ | | // | ||
+ | |||
+ | **Winding** or **coil** - a length of [[wire]] or [[conductor]] wound in a specific shape, in order to achieve specific [[magnetism|magnetic]], | ||
+ | |||
+ | <box 30% left #f0f0f0> | ||
+ | Windings on a [[toroidal core]] | ||
+ | [[file/ | ||
+ | {{page> | ||
+ | </ | ||
+ | |||
+ | Each loop of a winding is known as a [[turn]], and the number of turns is one of the basic characteristics of a winding. In some literature[(South> | ||
+ | |||
+ | In majority of designs the turns must be [[electrical insulator|electrically isolated]] from each other, as well as from the rest of the device (e.g. [[magnetic core]] and the surrounding medium). However, in some applications this is not required (e.g. in [[squirrel cage rotor|squirrel cage rotors]] of [[induction motor|induction motors]] and [[shaded-pole motor|shaded-pole motors]]). | ||
+ | |||
+ | The conductor in a power-related winding is typically required to carry a substantial amount of [[electric current]] (e.g. for generation of [[magnetic field]]), so it has to have a sufficient [[cross-section area]]. Conversely, sensing coils might carry only very small signal, so they can be made from very thin conductors. | ||
+ | |||
+ | //The word " | ||
+ | |||
+ | {{page> | ||
+ | |||
+ | ===== Types of windings ===== | ||
+ | |||
+ | |< 100% >| | ||
+ | | {{/ | ||
+ | |||
+ | There is a plethora of different types of windings used in practice, for a multitude of purposes.[(Zurek> | ||
+ | * achieve strong [[magnetic coupling]] for transferring energy ([[transformer]], | ||
+ | * magnetise [[magnetic core]] to produce high value of [[flux density]] to convert [[electricity]] to [[mechanical force]] or vice versa ([[motor]], [[generator]], | ||
+ | * to achieve the required value of [[inductance]] ([[inductor]], | ||
+ | * to produce high magnetic field for [[induction heating]] | ||
+ | * to produce [[uniform magnetic field]] for research, scientific and medical purposes (e.g. [[electromagnet]], | ||
+ | * to detect magnetic fields ([[sensor]], | ||
+ | * to provide [[electromagnetic shielding]] ([[flux band]]) | ||
+ | * to minimise the value of inductance ([[non-inductive resistor]], [[Ayrton-Perry winding]], [[bifilar winding]]) | ||
+ | * and many more. | ||
+ | |||
+ | <box 20% left #f0f0f0> | ||
+ | Winding in a [[magnetic circuit]] | ||
+ | [[file/ | ||
+ | {{page> | ||
+ | </ | ||
+ | |||
+ | <box 20% left #f0f0f0> | ||
+ | Types of windings: 1 - ordinary [[helical winding|helical]], | ||
+ | [[file/ | ||
+ | {{page> | ||
+ | </ | ||
+ | |||
+ | <box 20% left #f0f0f0> | ||
+ | Windings in [[3-phase transformer]] | ||
+ | [[file/ | ||
+ | {{page> | ||
+ | </ | ||
+ | |||
+ | <box 20% left #f0f0f0> | ||
+ | In [[induction motor]] the [[stator]] has typically wound copper coils and the [[rotor]] is made with cast aluminium " | ||
+ | [[file/ | ||
+ | {{page> | ||
+ | </ | ||
+ | |||
+ | |||
+ | <WRAP clear></ | ||
+ | |||
+ | |||
+ | |||
+ | <box 20% left #f0f0f0> | ||
+ | Winding in an [[autotransformer]] | ||
+ | [[file/ | ||
+ | {{page> | ||
+ | </ | ||
+ | |||
+ | <box 20% left #f0f0f0> | ||
+ | [[Water-cooled coil]] for [[induction heating]] | ||
+ | [[file/ | ||
+ | < | ||
+ | </ | ||
+ | |||
+ | <box 20% left #f0f0f0> | ||
+ | Winding in a large [[electromagnet]] | ||
+ | [[file/ | ||
+ | {{page> | ||
+ | </ | ||
+ | |||
+ | <box 20% left #f0f0f0> | ||
+ | Copper winding in a [[relay]] | ||
+ | [[file/ | ||
+ | {{page> | ||
+ | </ | ||
+ | |||
+ | <WRAP clear></ | ||
+ | |||
+ | <box 90% left #f0f0f0> | ||
+ | Windings on the [[rotor]] of a [[synchronous generator]]: | ||
+ | [[file/ | ||
+ | {{page> | ||
+ | </ | ||
+ | |||
+ | <WRAP clear></ | ||
+ | |||
+ | <box 20% left #f0f0f0> | ||
+ | Winding made from a copper [[enamelled wire]] around a cylindrical [[ferrite core]] to make a [[choke]] | ||
+ | [[file/ | ||
+ | {{page> | ||
+ | </ | ||
+ | |||
+ | <box 20% left #f0f0f0> | ||
+ | [[Current transformer]] with a [[primary winding|primary]] (thick bar) and [[secondary winding]] | ||
+ | [[file/ | ||
+ | < | ||
+ | </ | ||
+ | |||
+ | <box 20% left #f0f0f0> | ||
+ | [[Electronic transformer]] with an additional winding of an external [[shorted turn]] ([[flux band]]) for [[electromagnetic shielding]] | ||
+ | [[file/ | ||
+ | {{page> | ||
+ | </ | ||
+ | |||
+ | <box 20% left #f0f0f0> | ||
+ | Anti-theft security tag with an [[antenna coil]] made out of conductive foil | ||
+ | [[file/ | ||
+ | {{page> | ||
+ | </ | ||
+ | |||
+ | <WRAP clear></ | ||
+ | |||
+ | <box 20% left #f0f0f0> | ||
+ | Winding in a current sensor ([[Rogowski coil]]) | ||
+ | [[file/ | ||
+ | {{page> | ||
+ | </ | ||
+ | |||
+ | <box 20% left #f0f0f0> | ||
+ | Winding in a [[fluxgate sensor]] | ||
+ | [[file/ | ||
+ | {{page> | ||
+ | </ | ||
+ | |||
+ | <box 20% left #f0f0f0> | ||
+ | Winding made as tracks on a [[PCB]] | ||
+ | [[file/ | ||
+ | {{page> | ||
+ | </ | ||
+ | |||
+ | <box 20% left #f0f0f0> | ||
+ | [[Ayrton-Perry winding]] is used to make [[non-inductive resistor|non-inductive resistors]] | ||
+ | [[file/ | ||
+ | {{page> | ||
+ | </ | ||
+ | |||
+ | ===== See also ===== | ||
+ | *[[Solenoid]] | ||
+ | |||
+ | ===== References ===== | ||
+ | ~~REFNOTES~~ | ||
+ | |||
+ | {{tag> Winding Coil Counter}} |