Linear actuator with burn-out-proof coil
US6043573A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 12, 1998 |
| Grant date | Mar 28, 2000 |
| Priority date | — |
| Expiry date | Nov 12, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K41/035
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for manufacturing a linear voice coil actuator, capable of continuously generating a one hundred kilogram force with less than two amperes of current, requires using a coil for generating an electrical field and an unsaturated permanent magnet circuit for generating a magnetic field. In the method of manufacture, a flat surface of the electrical coil is positioned parallel to a flat surface of the magnet to establish a gap therebetween. Before operating the actuator, when no current is running through the coil, a distance of approximately 0.75 mm is established across the gap. Subsequently, during operation of the actuator, when a current of less than approximately two amperes is driven through the coil, the electrical field generated by the coil interacts with the magnetic field of the magnet to generate as much as a 100 kg force on the coil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.