Patent ID: 7148636

Claim:
A motor drive control apparatus for driving and controlling a linear vibration motor having a stator and a mover, the mover being supported by a spring so as to form a spring vibration system including the mover, said motor drive control apparatus comprising: a voltage output unit for outputting an AC driving voltage to the linear vibration motor; a current detector for detecting an AC driving current supplied to the linear vibration motor; a current waveform creation unit for creating a first AC current waveform to be a reference of the driving current, on the basis of the operating conditions of the linear vibration motor; and a controller for controlling the driving voltage of the linear vibration motor which is output from said voltage output unit, so as to reduce a difference between the first AC current waveform and a second AC current waveform which is a result of detection by said current detector; wherein said controller is operable to adjust a frequency of the AC driving current so as to be close to a resonance driving frequency of the linear vibration motor, according to an amplitude value or an effective value of the first AC current waveform while performing a control of the AC driving current.