Patent ID: 7005810
Filing Date: 2006-02-28
Classification: F04B,F25B,H02K,H02P

Abstract:
1. A motor driving apparatus for driving a linear vibration motor having a mover which is reciprocatably provided and a spring member which supports the mover, including: a motor driver having an operating mode for applying a driving voltage to the linear vibration motor so as to activate an operation of the motor, and a non-operating mode for applying a DC voltage to the linear vibration motor so as to generate a thrust of the mover; a thrust information output unit for outputting thrust information indicating the thrust of the mover, which is generated by the application of the DC voltage to the linear vibration motor; a thrust constant calculation unit for calculating a motor thrust constant of the linear vibration motor by performing an arithmetic operation of dividing the thrust indicated by the thrust information, by a DC current that is supplied to the linear vibration motor due to the application of the DC voltage to the linear vibration motor; and a mover position calculation unit for performing position calculation for obtaining the position of the mover on the basis of the calculated motor thrust constant.