Patent ID: 9467076
Filing Date: 2016-10-11
CPC Classification: H02P

Claim Text:
1. A position limiting device, comprising: a magnetic element disposed in the center of the position limiting device, wherein the magnetic element has a first end and a second end to define a first magnetic field intensity boundary value and a second magnetic field intensity boundary value respectively, wherein the first end and the second end have different magnetic poles; a detecting element configured to detect a magnetic field generated by the magnetic element, and correspondingly generate and transmit a magnetic field intensity signal; a motor coupled to the detecting element and configured to drive the detecting element to move; and a controller electrically coupled to the detecting element and the motor and configured to receive and process the magnetic field intensity signal to obtain a magnetic field intensity value, wherein the controller compares the magnetic field intensity value with the first magnetic field intensity boundary value or the second magnetic field intensity boundary value, when the magnetic field intensity value is smaller than the first magnetic field intensity boundary value or the second magnetic field intensity boundary value, the controller drives the motor and the detecting element moves related to the magnetic element by the motor, and when the magnetic field intensity value is equal to the first magnetic field intensity boundary value or the second magnetic field intensity boundary value, the controller stops the operation of the motor so that the detecting element stops moving.