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Precautions for selecting brushless motors

Brushless motor is a typical electromechanical integrated product, consisting of a motor body and a driver. Due to the fact that brushless DC motors operate in automatic control mode, they do not add another starting winding to the rotor like synchronous motors with heavy load starting under variable frequency speed regulation, and there will be no oscillation or step loss during sudden load changes. Electric motors are widely used, and many brushed motors have been replaced with brushless motors. From the name, this refers to motors without carbon brushes, but from the surface meaning, it is an evolved substitute for brushed motors. Below are some considerations for its selection.
1、 The selection of brushless motors should consider the needs of the motor body:
1. Power requirements for brushless motors: How many watts are needed.
What is the required speed in revolutions per minute.
How many volts is required to drive the motor.
4. The size of the motor needs to be: the diameter of the motor, the length of the motor, and the size of the shaft diameter.
5. Brushless motors are divided into Hall and non Hall, also known as induction or non induction, which one is required.
If used for low-speed brushless motors, it is necessary to consider whether and what kind of reducer is needed.


brushless motor

2、 After determining the selection, it is necessary to consider the matching problem of brushless DC motor drivers or brushless DC motor controllers
Firstly, the power of the driver or controller should be greater than the selected power.
For example, whether the functions of brushless DC motor drivers or brushless DC motor controllers meet the needs, there are many options in the speed regulation mode.
If there are communication control requirements, it is necessary to determine which driver or controller has communication control function, such as RS485.
4. Different drivers or controllers have significant differences in size or installation type, and should be carefully confirmed.
5. Whether or not a monitor is needed: Universal drivers or controllers will not display or simply display, which requires careful confirmation.
Are there any more complex control requirements? It is necessary to distinguish between drivers and controllers, which can control some more complex brushless motors, but the relative cost is slightly higher.
3、 Drive and control power supply
After the selection of brushless DC motor is determined, the importance of choosing switching power supply should be fully recognized. On the basis that the power supply voltage meets the requirements, it is required that the power supply be 30% or 50% higher than the motor, so that the motor can switch quickly and the power supply will not be blocked.
2. It is recommended to use a rectified and filtered linear power supply, with an appropriate increase in power.
I believe that after reading this, everyone will have a new understanding and knowledge of brushless motors. If you want to learn more about this topic, you can pay more attention to our website, hoping to help everyone.
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