Why can cancel traditional brushless motor has the necessary components of brush to brush motor, so that greatly increase the service life of brushless motor, but also to join the digital signal control, through the secondary development can realize the mode of operation of a lot of automation. Below for everyone to explain one of the most important reason: hall sensor. What is a hall sensor? Hall sensor is the production of a magnetic field sensor based on hall effect. Hall voltage changes along with the change of magnetic field intensity, the stronger the magnetic field, the higher the voltage, the weaker magnetic field, the lower the voltage, the hall voltage is very small, usually only a few millivolts, but by the amplifier amplification in the integrated circuit, can make the output voltage amplification enough strong signal. If make the hall integrated circuit sensor role, need to use mechanical methods to change the magnetic induction intensity. The hall effect sensors are passive sensors, it must have a plus the power to work, this characteristic makes it can detect low speed operation. Dc motor in the process of rotation, the current in the windings to constantly change direction, so that the rotor rotation in one direction. There, is to use brush and brush motor commutation device by means of mechanical contact for commutation. So brush rotating at high speed will produce a great wear, often need to clean up the carbon dust, if brush completely worn need to replace brush, this makes the use of a brush motor maintenance difficulty greatly enhanced. And brushless motor is by hall sensor to detect the winding real-time running position signal, again through the special chip microprocessor or the acquisition of signal processing, and real-time control corresponding driver circuit to control the motor winding. Due to the commutation of brushless motor is through the sensor and relevant circuit, so the brushless motor without brush commutation device with mechanical contact and wear and tear, often do not need to change the brush and other vulnerable devices, which can effectively improve the service life of the motor, reduce maintenance costs. Brushless motor, the advantages of using hall element non-contact mechanical commutation, increase longevity, because is magnetic testing brushless motor with hall element can resist oil resistance to dust, reduce maintenance difficulty. , to reduce the volume weight, reduce the motor weight, installation more convenient.
