发明名称 |
Linear motor device and machine tool having the same mounted thereon |
摘要 |
The present invention provides a linear motor device that can reduce a variation in thrust caused by a variation in attractive force. The linear motor device includes a linear motor 1 and a control section 30 that controls the linear motor 1. The linear motor 1 includes a magnet member 2 composed of permanent magnets having respective N poles and S poles alternately arranged in an axial direction, and a coil member 3 which is located orthogonally to the axial direction with respect to the magnet member 2 and through which the magnet member 2 is movable in the axial direction relative to the coil member 3. The control section 30 controls current conducted through the coil member 3 so that a moving one of the magnet member 2 and the coil member 3 reciprocates within a use range L corresponding to a part of a pitch p between the magnetic poles N and S in the magnet member 2.
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申请公布号 |
US7906877(B2) |
申请公布日期 |
2011.03.15 |
申请号 |
US20070902804 |
申请日期 |
2007.09.25 |
申请人 |
MURATA MACHINERY LTD.;GMC HILLSTONE CO., LTD. |
发明人 |
OKADA TAKUYA;ISHIYAMA NORITAKA |
分类号 |
H02K33/00;H02K35/00;H02K41/00;H02K41/02 |
主分类号 |
H02K33/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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