Linear motor driver having a position detection means
US6400046B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 26, 2000 |
| Grant date | Jun 4, 2002 |
| Priority date | — |
| Expiry date | May 26, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K29/08
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
There is disclosed a linear motor driver for a permanent magnet movable type linear motor employing a stator and a movable element, the driver performing the partial excitation of the movable element. The driver includes a stator having coil block and disposed on an inner bottom surface of a U-shaped frame, a movable element having a plurality of permanent magnets at an armature frame, a shield member provided on one side surface of the movable element, and having a magnet sensing unit formed on one side surface thereof for blocking magnet fields generated from the plurality of permanent magnets, and a controller board disposed on an inner wall of the U-shaped frame, and for sensing magnet fields generated from the magnet sensing unit to selectively supply an electric current into the coil block. Thus, an erroneous recognition of the position of the movable element can be prevented which may occur due to the magnet fields generated from the permanent magnets used for creating a thrust force of the motor. Therefore, an optimum driving condition for the linear motor can be accomplished. Further, by partly exciting the coils to drive the movable element, the power consumption by the c…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.