Data storage device, motor control device, and motor control method

A motor control method, comprising:

• detecting a supply voltage for driving a motor;
• referencing a parameter table containing registered position detection parameter values corresponding to possible supply voltage values;
• determining which of said registered position detection parameter values correspond to said detected supply voltage;
• setting a parameter value in accordance with said determined parameter value, said determined parameter value being used for detecting the position of said motor and for providing drive current parameters for driving said motor;
• detecting, in accordance with said set parameter value, a voltage induced on a coil of said motor generated by a current supplied to said motor;
• and
• determining a rotor position of said motor in accordance with said detected induced voltage.

A motor control device for a motor having coils in multiple phases, comprising:

• a parameter setup section configured to reference a parameter table containing registered position detection parameter values corresponding to possible supply voltage values, to determine which of said registered position detection parameter values correspond to an acquired supply voltage value, and to set said determined parameter value in a register, said determined parameter value being used for detecting the position of said motor and for providing drive current parameters for driving said motor;
• an induced voltage detection section configured to supply a current to a specified coil in accordance with said determined parameter value set by said parameter setup section and to detect a voltage induced on a coil to which no current is supplied;
• and
• a rotor position determination section configured to determine the rotor position of said motor in accordance with said induced voltage detected by said induced voltage detection section.