US 11,955,865 B2
Three-axis voice coil motor
Chien-Sheng Liu, Tainan (TW); Yi-Hsuan Lin, Keelung (TW); and Chiu-Nung Yeh, Kaohsiung (TW)
Assigned to National Cheng-Kung University, Tainan (TW)
Filed by National Cheng-Kung University, Tainan (TW)
Filed on Oct. 19, 2021, as Appl. No. 17/504,520.
Claims priority of application No. 110134306 (TW), filed on Sep. 15, 2021.
Prior Publication US 2023/0080656 A1, Mar. 16, 2023
Int. Cl. H02K 41/035 (2006.01); H02K 1/06 (2006.01)
CPC H02K 41/0356 (2013.01) [H02K 1/06 (2013.01); H02K 2201/18 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A three-axis voice coil motor, comprising:
a base with a supporting pole;
a spherical bearing rotatably sleeved around the supporting pole;
a magnetic component securely sleeved around the spherical bearing and rotating with the spherical bearing;
an X-coil group disposed around the magnetic component along an X-axial direction passing through the spherical bearing, wherein the X-coil group comprises a plurality of first gaps;
a Y-coil group disposed around the magnetic component along a Y-axial direction passing through the spherical bearing, wherein the Y-coil group comprises a plurality of second gaps; and
at least one Z-coil group disposed around the magnetic component along a Z-axial direction passing through the spherical bearing,
wherein when a current is input to the X-coil group, the Y-coil group, or the at least one Z-coil group and a magnetic field of the magnetic component is propagated to the X-coil group, the Y-coil group, or the at least one coil group, a corresponding Lorentz force may be generated to drive the magnetic component to rotate along the X-axial direction, the Y-axial direction, or the Z-axial direction on the spherical bearing,
wherein the spherical bearing comprises a first ring portion and a second ring portion, the first ring portion is securely sleeved around the supporting pole, the second ring portion is rotatably sleeved around the first ring portion, and the second ring portion is adapted to rotate relative to the first ring portion to drive the magnetic component to rotate relative to the X-coil group, the Y-coil group, or the Z-coil group,
wherein the base comprises a plurality of support rods disposed around a periphery of the supporting pole, and the support rods are connected to the at least one Z-coil group.