Features of Bare Litz Wires
About Bare Litz Wires
Product Range
| Cross-sectional Area | 0.5 sq. mm – 400 sq. mm |
|---|---|
| Diameter of single strand | 0.032mm – 2.52mm |
| Type of Lay | CONCENTRIC / NON-CONCENTRIC |
| Direction of lay | S/Z |
| Width of Pressed litz | UPTO 30 MM |
| Thickness of Pressed litz | UPTO 20 MM |
Product Range
| TAPES | YARNS |
|---|---|
| POLYESTER FILM | POLYESTER |
| MICA | NYLON |
| COTTON | SILK |
| FIBER GLASS | FIBER GLASS |
| NOMEX | ARAMID |
| SEMI-CONDUCTIVE | COTTON |
Types Bare Litz Wires
Features of HF Litz Wires
Single wire of HF Litz Wire is coated with enamel.
HF Litz wires avoids losses due to skin effect and proximity effect.
HF litz wires consists of bunched enameled wires.
The enamel insulations can be of temperature class 155, 180 , 200 , 220 or 240°C.
The enamel insulation on wires can be of Grade 1, Grade 2 or Grade 3 according to the customer requirement.
The HF litz wires can be provided with the additional insulations, in the form of yarns or tapes, which increases the electrical and mechanical values.
HF litz wires can be round or profiled (rectangular).
Skin Effect is the tendency of an electric current to distribute itself within a conductor such that the current density near the surface of the conductor is greater thatn at its core. The higher the frequency, the larger the impact of skin effect. HF Litz wire counteract this effect by increasing the surface area without significant increase in the size of conductor. Eddy currents which are generated through the fields of adjacent conductors also effect the performance of the single conductor. This is called proximity effect.
| Frequency | Individual Strand Diameter |
|---|---|
| 1.5 MHz – 2.8 MHz | 0.032 mm |
| 850 kHz – 1.5 MHz | 0.040 mm |
| 500 kHz – 850 kHz | 0.050 mm |
| 250 kHz – 500 kHz | 0.063 mm |
| 100 kHz – 250 kHz | 0.071 mm |
| 100 kHz – 250 kHz | 0.071 mm |
| 50 kHz – 100 kHz | 0.100 mm |
| 20 kHz – 50 kHz | 0.125 mm |
| 10 kHz – 20 kHz | 0.200 mm |
| 1 kHz – 10 kHz | 0.250 mm |
| 50 Hz – 1 kHz | 0.400 mm |
About High Frequency Litz Wires
Product Range
| Cross-sectional Area | 0.5 sq. mm – 400 sq. mm |
|---|---|
| Diameter of single strand | 0.032 MM – 1.00 MM |
| Type of Lay | CONCENTRIC / NON-CONCENTRIC |
| Direction of lay | S/Z |
| Width of Pressed litz | UPTO 30 MM |
| Thickness of Pressed litz | UPTO 20 MM |
Product Range
| TAPES | YARNS |
|---|---|
| POLYESTER FILM | POLYESTER |
| MICA | NYLON |
| COTTON | SILK |
| FIBER GLASS | FIBER GLASS |
| NOMEX | ARAMID |
| SEMI-CONDUCTIVE | COTTON |
Types of HF Litz Wires
Types of Insulations
| Type of Enamel | Temperature Index | Features |
|---|---|---|
| Polyvinyl formal modified | 120 | High mechanical, Hydrolysis resistance |
| Polyurethane modified | 155 to 180 | Solderable, Good flexibility, Better moisture resistance |
| Polyester-imide modified | 180 | Good electrical properties |
| Polyester-imide modified + Polyamide-imide | 200 | High temperature, Better dielectric values, Better moisture resistance |
| Polyamide-imide | 220 | Better thermal properties |
| Polyimide | 240 | Better flexibility, Better chemical compatibility High dielectric values |
| Type of Tape | Maximum Temperature | Features |
|---|---|---|
| Cotton | 105oC | Low cost, Good abrasion resistance |
| Cellulosic Papers ( Kraft paper / Crepe Paper) | 120oC | Better electrical values, Better bending values for crepe paper |
| Polyester (PET) | 135oC | High dielectric strength, Good abrasion resistance |
| Nomex ( Aromatic Polyamide) | 220oC | Excellent thermal properties, Excellent electrical properties, Good abrasion resistance, |
| Polyimide Kapton | 220oC(upto 400oC under certain conditions) | Very high dielectric strength, Very good chemical resistance, Excellent mechanical properties |
| Fiber Glass | Ultimate operating temperature determined by application and glass type | Excellent electrical properties at high temperature, Excellent solvent resistance |
| Mica | Ultimate operating temperature determined by application and glass type | Excellent electrical properties at high temperature, Flame resistant, Retains electrical properties during and after exposure to fire |
| Type of Yarn | Maximum Temperature | Features |
|---|---|---|
| Cotton | 105oC | Low cost, Good abrasion resistance |
| Polyamide (Nylon) / Polyester | 130oC | Excellent abrasion resistance, Solderable |
| Glass / Polyester | 155oC | Good abrasion resistance, Solderable |
| Glass | >180oC | Better Electrical properties at high temperatures |