Apparatus and method for controlling an electric motor
US5828196A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 22, 1997 |
| Grant date | Oct 27, 1998 |
| Priority date | — |
| Expiry date | Aug 22, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2089/065
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A bypass circuit conducts electrical current around a motor starter to a current limiting switch assembly upon initiation of a flow of excessive electrical current to an electric motor to protect the motor starter against excessive current flow. Upon initiation of excessive current flow to the electric motor, the current limiting switch assembly opens a main circuit to interrupt current flow through the motor starter. The current limiting switch assembly includes a conductor or contact carrier which is movable from an initial position to an actuated position under the combined influence of current flow through a coil and opposition between magnetic fields from portions of an electrical circuit through which current flows in opposite directions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.