Patent ID: 9052029
Filing Date: 2015-06-09
Classification: F02D,F16K,G01D

Abstract:
1. An apparatus for controlling an actuator that controls opening and closing of an intake valve, comprising: an input shaft connected to a motor and being rotatable in a forward and reverse direction; an output shaft configured and arranged to be rotatable in conjunction with the input shaft, and being provided with a first end connected to an intake valve, so that manipulation of the output shaft opens and closes the intake valve; a magnet unit provided at a second end of the output shaft and configured and arranged to be rotatable in conjunction with the output shaft, the magnet unit including a first magnet and a second magnet provided on concentric circles, wherein the first magnet is configured such that different poles are alternately arranged at an angle of 90° and the second magnet is configured such that different poles are alternately arranged at a predetermined angle at which an angle of rotation is desired to be controlled; and a control unit provided on a portion of the magnet unit and configured such that a first hall sensor is provided in a rotational section of the first magnet so as to sense a change in polarity of the first magnet with rotation of the magnet unit, and such that a second hall sensor and a third hall sensor are provided in a rotational section of the second magnet so as to sense a change in polarity of the second magnet with rotation of the magnet unit, wherein when one of the second hall sensor or the third hall sensor is located at a boundary between different poles, the other is located at a center of any pole.