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Brushless vs brushed motor in 2025 Which one should you choose

Brushless motor vs brushed in 2025: Which one should you choose?

Motorcycles, as a convenient means of transportation, are deeply loved by people (explore the top 10 Chinese motorcycle manufacturers). With the advancement of technology, the power source of motorcycles is also constantly innovating. As the heart of a motorcycle, the performance of the motor directly affects the riding experience and service life of the motorcycle.

In the field of motorcycle motors, brushless motors and brushed motors are the two main types. So, for motorcycles, which one is better, brushless motor or brushed? This article will conduct an in-depth comparative analysis of the brushless motor vs brushed from multiple aspects such as definition, working principle, advantages and disadvantages, application scenarios, and maintenance costs to help you make a wise choice.

Table of Contents
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Understanding motorcycle motors: Brushless motors vs brushed motors

Brushless Motor (BLDC): A brushless motor is a motor that uses an electronic commutator to achieve direct current to alternating current conversion. Simply put, it does not have the carbon brushes in traditional motors, but uses electronic components to control the direction of the current to drive the motor to operate. Brushless motors are usually composed of two parts: the motor body and the driver. They are a mechatronic product.

Brushed Motor: A brushed motor is a rotating motor with a brush device inside. The current is commutated in the rotor winding through the contact between the brush and the commutator. A brushed motor consists of a stator and a rotor. The stator usually has magnetic poles (winding type or permanent magnet type) and the rotor has windings.

What is a brushless motor

Working principle: brushless motor vs brushed

Working principle of brushless motor: Brushless motors use electronic commutation. The position sensor (usually a Hall sensor) inside the motor detects the position of the rotor and then sends a signal to the driver. Based on these signals, the driver accurately controls the direction of the current in the stator winding, thereby generating a rotating magnetic field and driving the rotor to rotate. Since there are no brushes, brushless motors avoid mechanical friction, reduce energy loss, and improve efficiency.

Working principle of brushed motor: The working principle of brushed motors is relatively simple. When current passes through the stator winding, a magnetic field is generated. This magnetic field interacts with the magnetic field in the rotor winding to drive the rotor to rotate. The brushes are in constant contact and friction with the commutator, which plays a conductive role and performs phase switching during rotation to ensure that the rotor continues to rotate. By changing the position of the brushes, the direction of rotation of the motor can be changed.

What is a brushed motor

Comparison of advantages and disadvantages: brushless motor vs brushed

Feature Brushless Motor (BLDC) Brushed Motor
Efficiency High (typically above 85%) Lower (typically between 70%–80%)
Lifespan Long (no brush wear) Short (affected by brush wear)
Maintenance Low (nearly maintenance-free) High (brushes need regular replacement)
Noise Low High (brush friction generates noise)
Control Precise (via electronic control) Relatively simple (but with lower control precision)
Electromagnetic Interference Low (no brush sparks) High (brush sparks cause EMI)
Cost Generally higher (due to complex electronics and controllers) Lower (simple structure, low production cost)
Starting Torque Requires specially designed BLDC motors for high starting torque; early versions had weaker startup torque High starting torque, can quickly start and drive heavy loads
Speed Control Performance Wide speed range, smooth and precise speed control Relatively narrow speed range, limited control precision, may vibrate at high speeds
Heat Dissipation Requires better thermal management, especially in high-power applications Simpler cooling design, but may overheat under prolonged heavy load

Motorcycle application scenarios: brushless motor vs brushed

In the field of motorcycles, both brushless motors and brushed motors have their applications:

Application of brushless motors in motorcycles

  • Electric motorcycles/electric bicycles: Brushless motors have become the first choice for electric motorcycles and electric bicycles due to their high efficiency and long life. It can provide longer cruising range, reduce maintenance costs, and reduce noise.
  • High-performance fuel motorcycles: In some high-performance fuel motorcycles, brushless motors are also used in auxiliary systems, such as electronic cooling fans, electronic fuel pumps, etc., to improve overall performance and reliability.
  • Starter motor: Some high-end motorcycles have begun to use brushless starter motors to provide a more reliable and faster starting experience.

Application of brushed motors in motorcycles

  • Old electric bicycles: In some old electric bicycles, brushed motors can still be seen. Due to their low cost, brushed motors were once a common choice for electric bicycles. But with the development of technology, brushless motors have gradually replaced brushed motors.
  • Low-end fuel motorcycles: In some low-end fuel motorcycles, brushed motors may be used for some auxiliary systems, such as starting motors. But due to their short life and high maintenance costs, they are gradually being replaced by brushless motors.
How to choose Motorcycle brushless motor vs brushed

Maintenance cost analysis: brushless motor vs brushed

Maintenance cost is one of the important factors to consider when choosing a motor:

Brushless motors are almost maintenance-free. The main maintenance is the lubrication of the bearings and occasional cleaning. Since there is no brush wear, the maintenance frequency and cost are greatly reduced.

Brushed motors require regular replacement of brushes. The wear rate of the brushes depends on the frequency of use and the working conditions. Replacing brushes requires certain skills and will result in a certain amount of downtime.

How to choose: Motorcycle brushless motor vs brushed

If you pursue high performance, long life, low maintenance cost (explore motorcycle maintenance), and sufficient budget, then the brushless motor is a better choice. It can provide longer mileage, more reliable performance and a quieter riding experience. Especially in electric motorcycles and high-end fuel motorcycles, brushless motors are the future development trend.

If you are very sensitive to cost and do not have high requirements for performance and life, then the brushed motor may be a temporary choice. But it should be noted that the maintenance cost of the brushed motor is high and the performance is relatively poor.

Conclusion

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Chase Wu
Chase is an industry expert and independent analyst specializing in electric two- and three-wheeler battery swapping systems. His expertise spans lithium-ion battery technology, intelligent battery swapping infrastructure, and electric mobility applications, with a strong focus on real-world deployment, market dynamics, and long-term industry development.
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