Which is better, mainstream brushed motors or brushless motors.
In modern industry and daily life, electric motors play an indispensable role as important devices for converting electrical energy into mechanical energy. Brushed motors and # brushless motors, as the two mainstream types of motors, each have their unique characteristics and applicable scenarios. Hehui Intelligent will compare the two in terms of structure, lifespan, energy consumption, noise, price, etc., to help readers choose the motor type that is more suitable for their needs.
structural difference
The most obvious difference between
brushed motors and brushless motors lies in their structure. The brushed motor contains an electric brush device, which changes the direction of current through mechanical commutation, that is, the external magnetic poles remain stationary while the internal coils move. Brushless motors, on the other hand, do not have electric brushes and use electronic commutation to control the direction of current through position sensors, thereby achieving the operation of the motor. This structural difference leads to differences in subsequent performance between the two.
Long lifespan
The service life of brushless motors is usually longer, up to 710 years, while the service life of brushed motors is about 23 years. This is because brushless motors reduce friction between brushes and commutators, reduce wear, and thus extend the service life of the motor.
energy consumption comparison
In terms of energy consumption, brushless motors typically have only one-third of that of brushed motors, resulting in higher energy efficiency. This is because the resistance of brushless motors is relatively small, resulting in less heat energy generated when the current does work, and more electrical energy is converted into mechanical energy. Therefore, brushless motors perform better in terms of energy conservation.
Noise level
Brushless motors, due to the absence of electric brushes, greatly reduce friction during operation, resulting in lower noise and smoother operation. This is particularly important for situations that require a low-noise environment, such as medical equipment or precision instruments that are sensitive to sound environments. However, brushed motors may produce noise due to friction between the brushes and the commutator, and are prone to damage.
price differenc
In terms of price, brushless motors require additional controllers due to their complex structure, resulting in higher costs and relatively expensive prices. The structure of brushed motors is simple, easy to produce and process, and the price is relatively low.
Summary of advantages and disadvantages
Brushed motor:
Advantages: simple structure, easy production and processing, convenient maintenance, low price, fast response, and high starting torque.
Disadvantages: Short lifespan, high noise, high energy consumption, frequent replacement of brushes, low efficiency, and low output power.
Brushless motor:
Advantages: Long lifespan, low noise, low energy consumption, high efficiency, low maintenance costs, and no electric brushes to reduce interference.
Disadvantages: Complex structure, expensive price, and the need for additional controllers.
Choose Suggestions
When choosing a motor, a balance should be made based on specific application scenarios and requirements. For situations with low requirements for sustained stability and limited budget, brushed motors may be a more suitable choice. For situations that require long lifespan, low noise, and high efficiency, brushless motors have more advantages. With the decreasing cost trend of brushless controllers and the development of brushless technology both domestically and internationally, brushless power systems are rapidly developing and becoming popular, providing possibilities for applications in more fields.
In summary, both brushed and brushless motors have their own advantages and disadvantages, and the choice of motor depends on specific application requirements and budget. When making a choice, factors such as the performance, price, and maintenance cost of the motor should be comprehensively considered to choose the most suitable type of motor for oneself.
