How to choose the appropriate brushless motor.
The importance of choosing a brushless motor
What is the reason why the recently purchased brushless motor burned out
Why do other people use motors of the same power much better than mine
The motor noise is simply unbearable, but the manufacturer says it's a normal phenomenon. Is that reasonable
I believe many buyers and users of brushless motors have had these doubts before. As the core power component of many modern devices, the selection of brushless motors has a crucial impact on the overall performance and lifespan of the equipment. So, how do we choose a cost-effective, stable, and durable brushless motor? Next, we will delve into this topic in depth.
Clarify application requirements
The primary task when choosing a brushless motor is to clarify which scenario it will be used for. This is similar to when looking for partners, we need to first clearly define our expectations and needs. Different application fields have vastly different requirements for motors, for example, drones/models may place more emphasis on lightweight and high power density, while industrial equipment may emphasize stability and durability. Therefore, before selecting a brushless motor, we must conduct a thorough analysis of the specific application requirements.
Analyze application cases
Understanding specific requirements is particularly important in different application scenarios. for example
Drones/model aircraft: These devices have high requirements for lightweight motors and high power density, while also requiring quick response to cope with various flight conditions.
Industrial equipment: This type of equipment requires strict stability and durability of the motor, while ease of maintenance is also an indispensable factor.
Electric tools: Brushless motors must be able to perform well in environments that require high torque, fast start, and impact resistance.
Home appliances: These products have clear requirements for the motor's noise reduction performance, energy-saving characteristics, and cost control.
Requirements and Suggestions
Before selecting, specific requirements for brushless motors should be detailed, including required power, torque, working environment characteristics, and tolerance for noise and vibration. Meanwhile, the budget range is also an undeniable factor. By clarifying these requirements, we can choose the most suitable brushless motor more wisely.
Review of performance parameters
When selecting a brushless motor, performance parameters are an indispensable consideration factor. These numbers not only reveal the core performance of the motor, but also help us make wiser decisions. Therefore, after in-depth analysis of application requirements, we need to carefully examine various performance parameters to ensure that the selected brushless motor can meet the requirements of practical applications.
Power and torque matching
Power, as a key indicator of motor capability, determines that the motor is capable of performing any job. And torque reflects the force that the motor can generate during operation. When choosing a brushless motor, it is necessary to carefully compare the matching of power and torque to ensure that the selected motor has both sufficient power and appropriate torque. At the same time, it is important to distinguish between rated values and peak values, as performance under peak conditions can only be maintained for a short period of time.
◆ Speed range selection
High speed motors are more suitable for fans and drones, and their speed design can meet the high efficiency requirements of these applications. Low speed high torque motors are suitable for electric tools and robots, and their characteristic is to provide stable torque output. In addition, although motors with a wide speed range have wider adaptability, their cost is relatively high and needs to be selected according to actual needs.
Efficiency indicators
Although the initial investment for a first level energy-efficient motor is relatively high, the energy-saving effect is significant over long-term use, making it more cost-effective in the long run. In contrast, ordinary motors have lower prices, but higher electricity costs and longer investment payback periods. Therefore, when making a choice, it is necessary to comprehensively consider the equipment's service life and electricity cost in order to make a wise decision.
◆ Real case warning
Real case warning: There have been AGV car manufacturers who encountered situations where the motor could not be driven when carrying heavy loads uphill due to selecting a motor with sufficient power but insufficient torque.
Internal Quality and Configuration
The intrinsic quality of a motor, namely its core configuration, has a decisive impact on its service life. A high-quality motor should have characteristics such as high efficiency, stability, and safety to ensure excellent performance in various working environments. Therefore, when choosing a motor, it is important to pay attention to its core configuration to ensure that the selected motor can meet long-term usage needs.
