What is the subject of brushless motor brushless motor by the motor and drive, is a typical mechatronics product. Because of the brushless dc motor based on automatic control type of operation, so don't like the synchronous motor frequency control of motor speed under overload start plus startup winding on the rotor, also won't generate oscillation and step out when load mutation. Brushless motor in the hall switch device, can use hall element, also can use hall switch circuit. To the use of hall element, usually an external amplifier circuit; Use hall switch circuit, can direct drive motor winding, has greatly simplified circuit, direct drive motor with hall switch lock circuit, ferromagnetic materials are motivated by the magnetic field, because of its high magnetic permeability, magnetic resistance is small, the field lines are concentrated inside the material. If the material evenly, the lines of magnetic force distribution is uniform. If defective in materials, such as holes, cracks, etc. , in the defect, the lines of magnetic force will be bent, the distortion that local magnetic field. Non-contact mechanical commutator in order to improve the service life of the magnetic testing, because it is so brushless dc motor with hall element can be resistant to oil and dust, greatly reduces the maintenance difficulty. Lose weight and weight, reduce the weight of the motor, make the installation more convenient. At present we choose is the United States honeywell production hall element of 41 f, can be in - 41 f hall element40 and + 120 ℃ under the environment of long running. This greatly increases the continuous working time of the brushless motor.
