Motor control apparatus and method

A motor control method comprising:

• applying, by a compensation signal generator applying a DC-Link voltage (VLink) for driving a motor to a parameter map preset in order to estimate a gain and phase of a motor torque ripple generated when the motor is driven according to a motor command current and a motor rotation speed for driving the motor, wherein the parameter map is preset to include a first parameter map corresponding to a lower limit of the DC-Link voltage for normally driving the motor and a second parameter map corresponding to an upper limit of the DC-Link voltage for normally driving the motor;
• generating, by the compensation signal generator, a compensation signal (icomp) for compensating for the motor torque ripple corresponding to a current input motor command current (iq*), motor rotation speed (ωm), and DC-Link voltage (VLink);
• and
• controlling, by a current controller, the current of the motor by controlling an inverter such that a compensation command current (iq*_comp), which is generated by reflecting the compensation signal (icomp) generated by the compensation signal generator in the motor command current (iq*), coincides with a motor drive current (iq) supplied to the motor from the inverter operated based on the DC-Link voltage.