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Brushless DC Motors*

Advantages Compared to
Brushed Motors

Electric motors are at the heart of many industrial and domestic applications. Among the various types available, brushless direct current motors (BLDC) are gaining popularity.

This article explores their characteristics and highlights their major advantages over traditional brushed motors.

What is a Brushless DC Motor?

A brushless DC motor is an electric motor that uses magnetic fields to generate rotary motion, without the use of brushes.

Unlike brushed motors, which rely on carbon brushes to switch the current in the windings, brushless motors rely on an electronic controller to manage switching.

This electronic approach allows for a simpler, more efficient, and more durable design.

Advantages of Brushless DC Motors

1. Increased Energy Efficiency

Brushless motors are generally more efficient than their brushed counterparts.

The absence of friction between the brushes and the commutator reduces energy losses and heat production, resulting in:

  • A better energy conversion,

  • A reduced consumption,

  • And an increased autonomy for battery-powered devices.

2. Durability and Longevity

Brushed motors suffer from mechanical wear of the brushes, requiring periodic replacements.

Brushless motors, devoid of these components, offer:

  • A longer lifespan,

  • An increased reliability,

  • And a more stable operation over the long term.

3. Less Noise and Vibration

The lack of contact between the brushes and the commutator makes brushless motors much quieter.

They also generate less vibration, making them ideal for:

  • Household appliances,

  • Medical equipment,

  • Or precision applications.

4. Superior Performance and Control

Thanks to their electronic control, brushless motors allow for:

  • A precise control of speed and torque,

  • An improved responsiveness,

  • And a constant torque maintenance over a wide range of speeds.

These characteristics make them particularly suitable for variable performance applications (drones, robots, electric vehicles, etc.).

5. Reduced Maintenance

With no brushes to replace, brushless motors require very little maintenance.

This results in:

  • Reduced maintenance costs,

  • And an increased availability of equipment.

6. Compactness and Lightness

The design of brushless motors allows for smaller and lighter devices than brushed motors, which is a major advantage for:

  • Drones,

  • Electric vehicles,

  • And portable devices where every gram counts.

Conclusion

Brushless DC motors represent a major evolution compared to brushed motors.

They combine energy efficiency, durability, performance, and low maintenance.

Although their initial cost is slightly higher, their long-term profitability and technical advantages make them a preferred choice in many modern applications.

As technology advances, their widespread adoption seems inevitable, gradually replacing brushed motors in multiple fields.


*: The technical information presented in this article is provided for informational purposes only. It does not replace the official manuals of manufacturers. Before any installation, handling, or use, please consult the product documentation and adhere to safety instructions. Torque.works cannot be held responsible for inappropriate use or incorrect interpretation of the information provided.