| 摘要 |
<p>An electro permanent magnetic holding apparatus is disclosed comprising: a magnetic base (2) made of a ferromagnetic material having a working side including a working face for holding a workpiece (8, 9) magnetically and/or mechanically and a back region remote from the working side; at least one magnetic pole (3) formed on the magnetic base (2), each magnetic pole (3) comprising at least one non-reversible permanent magnet (6), at least one reversible permanent magnet (4), and at least one electrical winding (5) for reversing the reversible permanent magnet (4) between an ON state for clamping the workpiece (8, 9) against the work face (14), and between an OFF state for releasing the workpiece (8, 9) from the work face (14); wherein the back region of the magnetic base (2) comprises at least one pocket (7) housing a magnetic sensor (10); wherein the magnetic pole (3), when being in the ON state, is configured for forming a closed magnetic loop (11) extending through the back region and the working side of the magnetic base (2) and through the workpiece (8, 9) in contact with the working face (14); and wherein the pocket (7) with the magnetic sensor (10) arranged within the back region of the magnetic base (2) at a place remote from the working face (14), thereby allowing sensing of magnetic flux extending through the back region of the magnetic base (2) and through the workpiece (8, 9).</p> |
