English
Chinese
Dongguan Hallsen Technology Co., Ltd
Application principle of Hall switch in brushless motor: Brushless motors are usually composed of rotors, stators and Hall switches. Based on the Hall effect principle, the Hall switch controls the rotor position and speed of the brushless motor by sensing magnetic field changes. In a brushless motor, a permanent magnet is fixed on the rotor, and the Hall switch is installed on the stator to sense the magnetic field changes generated by the permanent magnet. By monitoring the output signal of the Hall switch, the position of the rotor can be determined, thereby achieving precise control.
Recommended model: HS280 brushless DC motor Hall element
HS280 integrated Hall sensor output driver circuit is mainly used for electrical conversion of brushless DC motors. This IC integrates a Hall sensor, an operational amplifier, a comparator and a pair of complementary drain outputs (DO, DOB) with integrated pull-up resistors. When the magnetic flux density (B) is greater than the operating point (BOP), DO will turn on (low level) and DOB will turn off (high level). The status of the two output pins will remain until B is lower than the release point (BRP), at which time DO and DOB change their respective output states.
For DC fan applications, sometimes the power supply is reversed. The internal diode can only provide protection for the chip but not for the coil. Therefore, when applying, it is necessary to add an external diode, which provides protection for the coil when the power supply is reversed.
