Patent ID: 9525331
Filing Date: 2016-12-20
CPC Classification: H02K

Claim Text:
1. A linear motor including a slider having a mover, a motor body disposed in a moving path of the slider, and stators attached to the motor body, the stators being arranged along the moving path such that the stators face the mover, the linear motor being configured to move the slider along the moving path by generating attractive force between the stators and the mover, the linear motor comprising: a plurality of sensor substrates attached to the motor body so as to correspond to the respective stators, each of the plurality of sensor substrates being sized within a dimension of the respective stators with respect to a moving direction extending along the moving path; an upstream-side position detecting unit attached to each sensor substrate, the upstream-side position detecting unit being configured to detect the slider arriving at an upstream portion of each sensor substrate in the moving direction and outputting a position detection signal; a downstream-side position detecting unit attached to each sensor substrate, the downstream-side position detecting unit being configured to detect the slider arriving at a downstream portion of each sensor substrate in the moving direction and outputting a position detection signal; the position detection signal adding unit being configured to add one position detection signal from the downstream-side position detecting unit of a sensor substrate adjacent to an upstream side of the one sensor substrate in the moving direction and the position detection signal from the upstream-side position detecting unit of a sensor substrate adjacent to a downstream side of the one sensor substrate in the moving direction to obtain an addition signal, and the position detection signal adding unit being capable of outputting the addition signal; and corresponds based on the addition signal from the position detection signal adding unit.