Brushless motor, as the name implies, refers to the motor without brush and commutator, its reversing tasks to the electronic circuit to realize, so the brushless motor power system not only includes the main part of the motor, also includes electronic drive part, is the combination of mechanical and electronic products, let's look at the
the work principle of brushless motor
we can see from the above, brushless motor and with the same brush motor has a stator and the rotor structure, it's just a brush motor rotor coil, and the rotor is a permanent magnet brushless motor, and three of the stator coil winding raises three electrodes, at different times to three electrodes electricity, form electromagnet coil excitation, by the principle of the same, opposites attract, make the rotor permanent magnet produces the power, so the brushless motor is based on the interaction between the electromagnet and permanent magnet force to operate.
as shown above, when A winding of the stator coil, ventilation with high levels of rotor reverse polarity attracted to A magnet coil, at the same time to reverse excitation coil B input low level, in order to impel the rotation of the rotor, so the cycle, can form A brushless motor run. , of course, all this is the premise of need to know the position of the rotor, electronic drive at what point can decide which winding to electricity, so you also need to be on the stator with position sensor, is used in the diagram below hall element to detect the rotor position information.
the place on put together is narrated, brushless motor is through the hall element to detect the rotor position information and feedback to the electronic drive, and then according to the position of the rotor timely switch drive coil in the direction of current, resulting in a rotating magnetic field to make the rotor rotation. The principle of the motor is running with the maglev still have a lot of similarities.
pieces permanent magnet brushless dc motor is widely used in household appliances, security, automotive, electric vehicles, unmanned aerial vehicles, communication, computer, robotics, aerospace, industrial machinery, intelligent household, personal care and automation, and other fields. CD driver, hard disk in the computer is widely used in occasions such as the very sophisticated, different forms of permanent magnet dc motor.
in pieces at present, electric bicycles, electric scooters, mini electric car motor, the vast majority of the permanent magnet brushless dc motor. Electric bicycle with a permanent magnet brushless dc motor, production capacity of up to tens of millions of units in the whole country, now, sightseeing car, tourist car, forklift truck, electric cars are gradually applied in permanent magnet brushless dc motor, brushless motor with motor is to use the most guangfa, most production of permanent magnet brushless dc motor.
