Sensorless method to determine the static armature position in an electronically controlled solenoid device
US6476599B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 25, 1999 |
| Grant date | Nov 5, 2002 |
| Priority date | — |
| Expiry date | Mar 25, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L2201/00
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method is provided to determine a static position of an armature 24 of an electronically controlled solenoid device 10. The method provides an electronically controlled solenoid device having a first stator 14 and a first coil 16 operatively associated with the first stator, a second stator 18 and a second coil 22 operatively associated with the second stator, and an armature 24 mounted for movement between the first and second stators. The armature defines a magnetic circuit with each of the first and second stators and their associated coils. A flux of a magnetic circuit associated with each coil is ramped in a generally linear manner over a period of time. A nominal position of the armature is defined where current in both of the coils is substantially equal. A current slope of each of the coils resulting from the associated ramped flux is observed. An offset of each current slope from the nominal position is indicative of the static position of the armature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.