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的部分问题予以解答,以下是关于直流无刷电机的问答: Dongguan Bangtuo Transportation Control Intelligent Technology Co., Ltd. has collected some of the questions that customers often search for DC brushless motors to answer. The following are questions and answers about DC brushless motors:

Q: What is a DC brushless motor?

Answer: Since the controller provides DC power in different current directions, the alternating current direction of the coil in the motor is achieved. There are no brushes and commutators between the rotor and stator of a brushless motor.


Q: Why should there be three Halls for a DC brushless motor?

Answer: In order to rotate the DC brushless motor, there must always be a certain angle between the magnetic field of the stator coil and the magnetic field of the permanent magnet of the rotor. The process of rotating the rotor is also the process of changing the direction of the magnetic field of the rotor. In order for the magnetic fields of the two to have an angle, the direction of the magnetic field of the stator coil must be changed to a certain extent. So how do you know to change the direction of the stator magnetic field? It depends on those three halls. It can be considered that the three Halls are tasked with telling the controller when to change the direction of the current.


Q: What is the approximate power consumption range of the DC brushless motor hall?

Answer: The power consumption of the brushless motor hall is approximately 6mA-20mA.


Q: How to achieve commutation of DC brushless motor?

靠控制器来完成。 Answer: When the brushless motor is rotating, the current direction of the coil in the motor needs to be changed alternately so that the motor can continuously rotate. The DC brushless motor is completed by the controller.


Q: How high temperature can a DC brushless motor work? What temperature can the motor withstand?

Answer: If the temperature of the motor cover exceeds 25 degrees above the ambient temperature, it indicates that the temperature rise of the motor has exceeded the normal range. Generally, the temperature rise of the motor should be below 20 degrees. Generally, the motor coil is wound by enameled wire, and when the temperature of the enameled wire is higher than about 150 degrees, the paint film will fall off due to the high temperature, causing a short circuit in the coil. When the coil temperature is above 150 degrees, the temperature exhibited by the shell of the brushless motor is about 100 degrees, so if the shell temperature is taken as the basis, the highest temperature that the brushless DC motor can withstand is 100 degrees.


Question: Why can't any one of the brushless DC controller and DC brushless motor be turned on normally? Why is there a reverse phase sequence for DC brushless?

Answer: Generally speaking, the brushless DC motor is such a process in actual movement: the motor rotates-the rotor magnetic field direction changes-when the angle between the stator magnetic field direction and the rotor magnetic field direction reaches 60 degrees electrical angle-Hall signal Change-the phase current direction changes-the stator magnetic field spans an electrical angle of 60 degrees forward-the angle between the stator magnetic field direction and the rotor magnetic field direction is 120 electrical degrees-the motor continues to rotate. This way we understand that Hall has six correct states. When a specific Hall tells the controller, the controller has a specific phase output state. Therefore, the inversion sequence is to complete such a task, that is, to make the electrical angle of the stator always step in one direction at an electrical angle of 60 degrees.

In addition to the above points, there is a lot of knowledge about DC brushless motors. You can pay attention to Dongguan Bangtuo brushless motors and see more brushless motor knowledge.

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