High frequency power and communications cable
US5777273A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 26, 1996 |
| Grant date | Jul 7, 1998 |
| Priority date | — |
| Expiry date | Jul 26, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01B9/003
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electrical cable for use in high-frequency, high power applications, such as with an inductive charging system used to charge batteries of an electric vehicle. The cable has multiple twisted-pairs of separately insulated stranded wire arranged in a pseudo-Litz wire architecture that surround a coaxial cable. The coaxial cable carries bidirectional RF communication signals between a power source of the charging system and the vehicle. The cable has an outer EMI shield that includes a metalized mylar layer surrounded by a high coverage tinned-copper braid layer. The multiple twisted-pairs of wires and coaxial cable are embedded in a polytetrafluoroethylene filler material that surrounds them inside the outer EMI shield. An outer silicone cover is disposed around the outside of the cable. The cable efficiently transfers power at high-frequency AC power, between 100 KHz to 400 KHz at high-voltage levels, on the order of from 230 V to 430 V. The cable carries bidirectional RF communication signals using a 91.5 MHz carrier frequency. The cable is designed for use in an outdoor operating environment while maintaining its flexibility. The cable also has sufficient shielding to maintain …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.