# Multi-layer Coil

**Inductance** of a multi-layer coil of rectangular cross section can be computed by below formula when optimizing maximum distributed capacitance (Cda xxx Coo) and distributed inductance (Dla xxx Dln) of Figure (7-3) to intensify **Inductance Field Strength** (FLa xxx FLn) to function as a voltage multiplier in switch-off conditions (612a xxx 612n), as illustrated in (710) of ~ . Figure (7-10) as to **VIC Coil Assembly** (580) of Figure (6-1) and, is expressed:

<table border="1" id="bkmrk-figure-%287-3%29-%28710%29-o" style="border-collapse: collapse; width: 100%;"><tbody><tr><td class="align-center" style="width: 49.9383%;">Figure (7-3)

[![image-1702611606686.png](https://stanslegacy.com/uploads/images/gallery/2023-12/scaled-1680-/u1VHLAPCWpdV1nY5-image-1702611606686.png)](https://stanslegacy.com/uploads/images/gallery/2023-12/u1VHLAPCWpdV1nY5-image-1702611606686.png)

</td><td class="align-center" style="width: 49.9383%;">(710) of Figure (7-10)

[![image-1702611619154.png](https://stanslegacy.com/uploads/images/gallery/2023-12/scaled-1680-/ntlSL5wboAbusOLy-image-1702611619154.png)](https://stanslegacy.com/uploads/images/gallery/2023-12/ntlSL5wboAbusOLy-image-1702611619154.png)

</td></tr><tr><td class="align-center" style="width: 49.9383%;">(580) of Figure (6-1)

 [![image-1702323131155.png](https://stanslegacy.com/uploads/images/gallery/2023-12/scaled-1680-/axyMmFebag8VQyKq-image-1702323131155.png)](https://stanslegacy.com/uploads/images/gallery/2023-12/axyMmFebag8VQyKq-image-1702323131155.png)

</td><td class="align-center" style="width: 49.9383%;">  
</td></tr></tbody></table>

[![image-1702445551138.png](https://stanslegacy.com/uploads/images/gallery/2023-12/scaled-1680-/25qf8F5eQmFzf5CS-image-1702445551138.png)](https://stanslegacy.com/uploads/images/gallery/2023-12/25qf8F5eQmFzf5CS-image-1702445551138.png)

**Where**,

  
(L) is the **inductance** in microhenries,

(N) is the **number of** **turns**,

(A) is the **mean radius** in inches,

(B) is the **length of the coil** in inches,

(C) is the **depth of the coil** in inches.