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

Let s understand the significance of this sensor in an automotive motor control system.

The hall effect sensor is used as the rotor position sensor for the bldc motor.

On the whole the winding responses according to the magnetic field of the electric motor s permanent magnet thus generating the required torque. 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. Efficiency durability and performance are the attributes that concern the engineers the most while designing such a system. 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.

Common magnetic sensor hall components or hall integrated circuit magnetic resistor and magnetic diode etc. In either case the hall sensors can also be used for accurate position sensing. 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.

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. 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. Some types of bldc controllers use the motor s intrinsic back emf leaving the hall effect sensors unused. A bldc motor control system is a complicated circuit where several components work in tandem to make the motor move in a desired manner.