Hi Mahesh,
In order to hold the rotor of your BLDC at given angle the magnetic field of the stator must be holding the rotor at your desired angle. This will give you the required holding torque needed to keep your load at the desired angle.
With a BLDC, this is often achieved using a three phase sinusoidal drive. When the rotor has reached the angle you would like to stop at, the three phases are energized so that the current flowing through each phase will hold the rotor at the desired angle.
In order to hold the rotor of your BLDC at given angle the magnetic field of the stator must be holding the rotor at your desired angle. This will give you the required holding torque needed to keep your load at the desired angle.
With a BLDC, this is often achieved using a three phase sinusoidal drive. When the rotor has reached the angle you would like to stop at, the three phases are energized so that the current flowing through each phase will hold the rotor at the desired angle.