Summary:
Here we explain the skin effect in alternating current (AC) and why it matters for high-frequency electrical applications.
When AC flows through a conductor, especially at higher frequencies, the current doesn’t spread evenly through the entire cross-section. Instead, it concentrates near the surface of the wire. This reduces the effective area available for current flow, which increases resistance and causes more energy loss as heat.
To address this problem, the video introduces Litz wire, which is made of many thin, individually insulated strands twisted or braided together. Because each strand is very small, the skin effect is minimized, and current can flow more uniformly through the cable.
The result is lower AC resistance, improved efficiency, and reduced power loss, making Litz wire especially useful in high-frequency devices like transformers, inductors, and motors.
Don’t want to watch the video? Read the transcript below instead.
00:00:04:12 – 00:00:18:04
Today we’re here to talk about the skin effect and why it’s important in choosing a litz cable.
00:00:18:04 – 00:00:25:14
When alternating current or AC flows through a conductor, something interesting happens, especially at high frequencies.
00:00:26:00 – 00:00:48:11
The current spreading evenly across the wires cross-section. It tends to concentrate near the surface of the conductor. This is called the skin effect. The higher the frequency, the more pronounced it becomes. Why does it matter? Well, when the current is forced to flow only on the surface, the effective area of the conductor shrinks and the resistance increases.
00:00:48:12 – 00:00:53:03
That means more energy is wasted as heat, which isn’t exactly ideal for efficiency. This is where Litz wire comes to the rescue. Litz cables are made of many thin, individually insulated strands, twisted or braided together. Each strand is small enough that the skin effect doesn’t limit current flow to just the surface. Plus, the unique weaving ensures all the strands share the current more evenly.
00:01:15:00 – 00:01:34:02
The result? Lower AC resistance, reduced power loss, and better performance in high frequency applications like transformers, inductors, and motors. So whenever efficiency at high frequencies is a priority, litz cable are the go to solution for minimizing the impact of skin effect.
00:01:34:02 – 00:01:42:06
If you have any more questions. Please feel free to contact us.
