The Hall Effect Sensor Is Used As The Rotor Position Sensor For The Bldc Motor

Efficiency durability and performance are the attributes that concern the engineers the most while designing such a system.

The hall effect sensor is used as the rotor position sensor for the bldc motor. The basic principles are hall effect and magnetoresistance effect. In the bldc motor the hall sensor detects the position of the rotor s rotating magnetic field and provides the corresponding winding excitation through the logic and driving circuit. On the whole the winding responses according to the magnetic field of the electric motor s permanent magnet thus generating the required torque. In either case the hall sensors can also be used for accurate position sensing.

A bldc motor with a magnetic sensitive position sensor is installed on a stator assembly to detect changes in the magnetic field generated by permanent magnets and rotors. Hall effect sensors are the most common method of determining rotor position in bldc motors due to their low cost and ease of use with the permanent magnets of the rotor. A bldc motor control system is a complicated circuit where several components work in tandem to make the motor move in a desired manner. A hall effect sensor is a widely used sensor that provides rotor position feedback to a motor controller.

And since the commutation happens in 60 degree increments high resolution sensing and output are unnecessary. Hall sensor sequence calibration of bldc motor open example this example calculates the hall sensor sequence with respect to position zero of the rotor in open loop control. Some bldc brushless dc motors are equipped with three internal hall effect sensors that provide feedback to external circuits that facilitate precise control of the magnetic coils in the stator. Some types of bldc controllers use the motor s intrinsic back emf leaving the hall effect sensors unused.