Direct-current brushless motor

Abstract

The invention discloses a direct-current brushless motor. The direct-current brushless motor comprises a motor housing, a fixed plate, supporting screws, an interface, a current inverter, screw holes,a fixed baffle plate, a sealing ring, a transmission shaft, a connection ring, heat dissipation holes, a locating pin, rotors, stators, V interfaces, W interfaces, U interfaces, L interfaces, a port,a capacitor, an electrical resistor, a resistor and a triode; the fixed plate is arranged in the motor housing; the supporting screws are arranged at lateral edges of the fixed plate; the interface is arranged at a lateral edge of one supporting screw; the current inverter is arranged at one side of the interface; the screw holes are formed at one side of the current inverter; the fixed baffle plate is arranged at one side of the screw holes; the locating pin is connected at one side of each of the heat dissipation holes; the fixed plate is made of an aluminum alloy material and is light in weight and simple in structure; the sealing ring is made of a wearable silica gel so as to protect the airtightness of the inside; and the rotors are made of a silicon steel and four groups of the rotors are uniformly distributed in the motor. Therefore, the resistance generated by mutual attraction between an N pole and an S pole is reduced and the problem of conversion of a direct current to an alternating current is solved via the current inverter.

Description

technical field [0001] The invention relates to the field of motor products, in particular to a DC brushless motor. Background technique [0002] At present, in the field of motor products, the brushless DC motor is composed of the motor body and the driver. It is a typical mechatronics product. The stator windings of the motor are mostly made of three-phase symmetrical star connection, which is very similar to the three-phase asynchronous motor. , The magnetized permanent magnet is stuck on the rotor of the motor. In order to detect the polarity of the motor rotor, a position sensor is installed in the motor. The driver is composed of power electronic devices and integrated circuits. Its function is to accept the start and stop of the motor , Brake signal to control the start, stop and brake of the motor, accept position sensor signal and forward and reverse signal, used to control the on-off of each power tube of the inverter bridge, and generate continuous torque; accept ...

AI Technical Summary

Problems solved by technology

[0002] At present, in the field of motor products, the brushless DC motor is composed of the motor body and the driver. It is a typical mechatronics product. The stator windings of the motor are mostly made of three-phase symmetrical star connection, which is very similar to the three-phase asynchronous motor. , The magnetized permanent magnet is stuck on the rotor of the motor. In order to detect the polarity of the motor rotor, a position sensor is installed in the motor. The driver is composed of power electronic devices and integrated circuits. Its function is to accept the start and stop of the motor , Brake signal to control the start, stop and brake of the motor, accept position sensor signal and forward and reverse signal, used to control the on-off of each power tube of the inverter bridge, and generate continuous torque; accept speed command and speed feedback signal , used to control and adjust the speed; provide protection and display, etc., DC motor has fast response, large starting torque, and can provide rated torque from zero speed to rated speed, but the advantages of DC motor are also just It is its shortcoming, because the DC motor needs to produce constant torque performance under rated load, the armature magnetic field and the rotor magnetic field must be kept at 90 degrees, which requires carbon brushes and commutators, carbon brushes and commutators in the motor rotation Sparks and carbon powder will be generated when the motor is used. Therefore, in addition to causing damage to the components, the application occasions are also limited. The AC motor has no carbon brushes and commutators, and is maintenance-free, sturdy, and widely used. The performance can only be achieved by complex control technology. Nowadays, the rapid development of semiconductors has accelerated the switching frequency of power components, improving the performance of the drive motor, and the speed of the microprocessor is getting faster and faster. In the coordinate system, the two-axis current components of the AC motor are properly controlled to achieve similar DC motor control and have comparable performance to the DC motor, but the motor is not like an ordinary DC motor. The AC motor is used under normal conditions. This experimental model is mainly for solve the above problems

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