Angle detecting module and method for motor rotor

An angle detecting, method for a motor rotor, comprising:

• providing a permanent-magnet synchronous motor having a stator and a rotor;
• disposing three linear hall components on the stator, wherein each of the linear hall components is spaced by electrical 120 degrees;
• connecting a processing device to the linear hall components;
• outputting an analog signal having a magnetically saturated third harmonic component to the processing device by each of the linear hall components;
• and
• optimizing each of the analog signals by the processing device and generating an average rotor angle.

An angle detecting module for a motor rotor disposed on permanent-magnet synchronous motor, the angle detecting module comprising:

• a magnetic disk disposed on the permanent-magnet synchronous motor and rotated along with the permanent-magnet synchronous motor rotor;
• and
• a detecting device disposed on the permanent-magnet synchronous motor relative to the magnetic disk, the detecting device comprising:
• three linear hall components spaced by electrical 120 degrees, the linear hail components measuring a magnetic field position of the motor rotor of the permanent-magnet synchronous motor and outputting an analog signal, each of the analog signals has magnetically saturated third harmonic component;
• and
• a processing component electrically connected to the linear hall components, the processing component optimizing each of the analog signals and generating an average rotor angle.