Hall element and motor starting principlea

Hall element and motor starting principlea

The driving principle of the Hall element and the motor is shown in the figure. When the Hall element Hl is aligned with the N pole of the rotor magnet, IC2 outputs a high
level, VT3 is turned on and the output current goes to ground through L1 and k, and the coil generates a magnetic field to drive the rotor; when Hl is aligned with the S pole, IC2 outputs a negative level. When voltage VT4
is turned on, reverse current appears in k and Li, which also generates a magnetic field that drives the rotor to rotate. In the same way, when H2 is aligned with the S pole, or
when aligned with the N pole, a forward or reverse current will flow through L3 and L4 under the control of the ICl circuit, generating a driving magnetic field in the same direction.