| 摘要 |
<p>A linear motor includes a magnet unit (2) and a coil unit (1). The magnet unit (2) includes two magnet arrays oppositely parallel and symmetrically located on a magnetic yoke (3): a first and a second magnet array (21, 22). The coil unit (1) is disposed in a magnetic gap (4) between the two magnet arrays. In a spatial rectangular coordinate system defined by X, Y and Z axes, the coil unit (1) includes a first and a second coil array (11, 12) arranged in a stacked manner in the Z-axis direction and staggered from each other by a distance of ”P in the Y-axis direction. ”P satisfies: when a control system charges the coil unit (1) with a desired current, the coil unit (1) generates a control force along the Y-axis direction, another control force along the Z-axis direction, and a moment about the X-axis direction, which may reduce a magnetic flux leakage and provide higher driving forces, making the linear motor generate required three degrees-of-freedom control force or control torque, and further improve vertical and horizontal magnetic fluxes in the magnet array.</p> |
