"प्रेरक": अवतरणों में अंतर
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पंक्ति 5:
प्रेरक को साधारण भाषा में 'चोक' (choke) और 'कुण्डली' (coil) भी कहते हैं।
== उपयोग ==
* [[विद्युत फिल्टर|वैद्युत फिल्टर]] बनाने के लिये
* उर्जा भंडारित करने के लिये ( E = L.I<sup>2</sup>/2 )
पंक्ति 12:
* पुरानी कारों एवं स्कूटरों आदि में स्पार्क पैदा करने के लिये (इग्नीशन क्वायल)
== प्रेरकत्व गणना के लिये सूत्र ==
{| class="wikitable"
पंक्ति 23:
| <math>L=\frac{\mu_0KN^2A}{l}</math>
|
* ''L'' = inductance in [[Henry (unit)|henries]] (H)
* ''μ<sub>0</sub>'' = [[permeability of free space]] = 4''<math>\pi</math>'' × 10<sup>−7</sup> H/m
* ''K'' = Nagaoka coefficient<ref name=Nagaoka/>
* ''N'' = number of turns
* ''A'' = area of cross-section of the coil in [[square metre]]s (m<sup>2</sup>)
* ''l'' = length of coil in metres (m)
|
|-
पंक्ति 35:
<br /> <math> + \frac{\mu}{2\pi} o\left(\frac{l}{4+c\sqrt{\frac{2\omega\mu}{\rho}}}\right)</math>
|
* ''L'' = inductance
* ''l'' = cylinder length
* ''c'' = cylinder radius
* ''μ''<sub>0</sub> = vacuum permeability = <math>4\pi</math> nH/cm
* ''μ'' = conductor permeability
* ''p'' = resistivity
* ''ω'' = phase rate
| exact if ω = 0 or ω = ∞
|-
| <math>L = 0.2 l\left(\ln\frac{4l}{d}-1\right)</math> -0+3%
|
* ''L'' = inductance (µH)
* ''l'' = length of conductor (mm)
* ''d'' = diameter of conductor (mm)
* ''f'' = frequency
|
* Cu or Al
पंक्ति 57:
| <math>L = 0.2 l\left(\ln\frac{4l}{d}-\frac{3}{4}\right)</math> +0-3%
|
* ''L'' = inductance (µH)
* ''l'' = length of conductor (mm)
* ''d'' = diameter of conductor (mm)
* ''f'' = frequency
|
* Cu or Al
पंक्ति 69:
| <math>L=\frac{r^2N^2}{9r+10l}</math>
|
* ''L'' = inductance (µH)
* ''r'' = outer radius of coil (in)
* ''l'' = length of coil (in)
* ''N'' = number of turns
|-
! Multilayer air-core coil{{Citation needed|date=November 2010}}
| <math>L = \frac{0.8r^2N^2}{6r+9l+10d}</math>
|
* ''L'' = inductance (µH)
* ''r'' = mean radius of coil (in)
* ''l'' = physical length of coil winding (in)
* ''N'' = number of turns
* ''d'' = depth of coil (outer radius minus inner radius) (in)
|-
! rowspan="2"|Flat spiral air-core coil{{Citation needed|date=November 2010}}
| <math>L=\frac{r^2N^2}{(20r+28d)}</math>
|
* ''L'' = inductance (µH)
* ''r'' = mean radius of coil (cm)
* ''N'' = number of turns
* ''d'' = depth of coil (outer radius minus inner radius) (cm)
|-
| <math>L=\frac{r^2N^2}{8r+11d}</math>
|
* ''L'' = inductance (µH)
* ''r'' = mean radius of coil (in)
* ''N'' = number of turns
* ''d'' = depth of coil (outer radius minus inner radius) (in)
|-
! Toroidal core (circular cross-section){{Citation needed|date=November 2010}}
| <math>L=\mu_0\mu_r\frac{r^2N^2}{D}</math>
|
* ''L'' = inductance (H)
* ''μ<sub>0</sub>'' = [[Permeability (electromagnetism)|permeability]] of [[vacuum|free space]] = 4''<math>\pi</math>'' × 10<sup>−7</sup> H/m
* ''μ<sub>r</sub>'' = relative permeability of core material
* ''r'' = radius of coil winding (m)
* ''N'' = number of turns
* ''D'' = overall diameter of toroid (m)
|}
== सन्दर्भ ==
{{reflist}}
== बाहरी कड़ियाँ ==
* [http://electronics.howstuffworks.com/inductor1.htm How stuff works] The initial concept, made very simple
* [http://www.lightandmatter.com/html_books/4em/ch07/ch07.html Capacitance and Inductance] - A chapter from an online textbook
पंक्ति 121:
{{भौतिकी-आधार}}
[[श्रेणी:विद्युतचुम्बकीय अवयव]]
[[श्रेणी:उर्जा भंडारण]]
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