Type 9 Litz is a coax-style construction featuring a core constructed of Litz wire with transposed bundles, an insulation layer of controlled dielectric constant and thickness, an additional braid or coax-style conductor that matches the conductor area of the core conductor, with optional outer insulation of textile yarn, tape or extruded compounds.
The Type 9 style, offers several advantages that make it ideal for specific applications:
Matched Impedance (Controlled Low Inductance)
- Reduction of losses due to reflection: Many high-power applications have loads that are not the traditional impedance of 50 or 100 OHMS. For example, Bell Labs has found that 30 OHMS is ideal for power transfer1. Type 9 Litz cables can be matched to your load to reduce losses due to reflection.
Improved Signal Integrity
- Reduced electromagnetic interference (EMI): The coaxial design provides excellent shielding, preventing external electromagnetic noise from interfering with the signal. Type 9 styles are also available as a triax configuration to further reduce noise emissions.
Efficient Power Transfer
- Lower AC resistance: Like traditional Litz wire, the coaxial version effectively reduces skin effect and proximity effect losses, leading to lower AC resistance.
- Improved power transmission: This lower AC resistance enables more efficient power transfer, making it suitable for applications like induction heating.
Specific Applications for Coaxial Style Litz Wire
Coaxial Litz wire, with its unique combination of low loss, high-frequency performance, and improved signal integrity, finds applications in a variety of industries. Here are some specific examples:
Industrial Applications
- Induction heating systems: For efficient power transfer and heat generation and its ability to handle high currents and frequencies while minimizing losses.
- Plasma coating and cutting: Due to its ability to handle high currents and frequencies.
- Power distribution in the KHZ to low MHz range: For applications requiring low loss and high-frequency performance.
Medical Applications
- MRI interconnects: For interconnection of power sources to bore assembly.
- Medical diagnostic instruments: Where high-frequency power and low noise are critical.
- Medical therapy equipment: For efficient power transfer and precise control.
Other Applications
- Lasers: For high-power and high-frequency applications.
- Wireless power transfer: In systems that require efficient and reliable energy transmission.
- Automotive industry: For high-voltage applications and power electronics.
- Aerospace and defense: In systems requiring lightweight, high-performance components.
- Rochester, Louis. Coaxial Cables Application Data. Cambridge, Boston Technical Publishers, Inc., 1969. ↩︎
