Motor control method and device

A motor control device adapted for a startup process for a brushless DC (BLDC) motor, the motor control device comprising:

• a driving unit, generating a phase voltage signal and a driving voltage signal according to a startup current signal with a first predetermined value and a phase current signal;
• an inverter, generating a driving current signal according to the driving voltage signal to drive the BLDC motor to rotate, wherein the first predetermined value causes the BLDC motor to maintain a normal rotation;
• a sensing unit, sensing the driving current signal of the inverter to correspondingly generate the phase current signal;
• and
• a control unit, providing the startup current signal, determining a load state of a shaft end of the BLDC motor according to the phase voltage signal and the startup current signal, and adaptively adjusting a magnitude of the startup current signal according to the load state of the shaft end and/or according to an electric rotation angular velocity and a torque demand of the BLDC motor, wherein the phase voltage signal correspondingly changes with the phase current signal.