In underwater robot design and manufacturing, brushless motors play a critical role in propulsion and motion control systems. Brushless DC motors (BLDC) are widely adopted in underwater robots due to their high efficiency, long service life, low noise, and suitability for waterproof sealing. For engineers, researchers, and procurement teams, understanding commonly used brushless motor models helps improve system reliability and overall performance.
Underwater robots developed or deployed in Taiwan—such as industrial ROVs, scientific AUVs, and underwater inspection platforms—typically rely on proven brushless propulsion motors and customized joint motor solutions. These systems often combine Taiwanese engineering expertise with globally sourced components.
Common Brushless Propulsion Motor Models
M080 Series Underwater Thruster Motors
The M080 series brushless underwater thruster motors are commonly used in light to medium-duty underwater robots. These motors typically deliver around 360 W of power, support 12 V or 24 V input, and are designed for operation at depths of up to 200 meters. With thrust output around 9 kg, they are frequently installed as horizontal or vertical thrusters in small ROVs and AUVs.
In Taiwanese underwater robotics projects, this type of motor is often integrated into modular thruster assemblies, combined with waterproof electronic speed controllers (ESCs) and sealed propeller housings to achieve stable and efficient propulsion.
SW2820 and Similar Specification Motors
Brushless motors with specifications similar to the SW2820 model are also widely used in underwater propulsion systems. These motors are typically paired with custom propellers to generate approximately 3 kg of thrust and are designed for 24 V to 36 V power systems. Their compact size and high rotational speed make them suitable for small ROVs and modular underwater vehicles.
Such motors are commonly installed in ducted thruster housings, which simplify sealing and maintenance while maintaining good hydrodynamic efficiency. For educational, research, and inspection-class underwater robots, motors in this category are a popular choice.
T200 High-Thrust Brushless Motors
For competition robots, heavy-payload systems, or medium-sized underwater platforms, T200 brushless DC thruster motors are frequently adopted. These motors provide higher thrust output and feature robust pressure-resistant designs suitable for moderate underwater depths.
T200-type motors are widely used where stronger propulsion and stable long-duration operation are required, while still maintaining relatively simple control and integration characteristics.
Brushless Motors for Joints and Attitude Control
Underwater robots require more than just propulsion. Precise movement control is essential for functions such as robotic arms, steering mechanisms, control fins, and orientation systems. For these applications, brushless motors designed for joints and actuators are commonly used.
Custom Brushless Joint Motors
Brushless joint motors used in underwater robotic arms and steering systems are typically custom or OEM designs. These motors emphasize high torque output, smooth low-speed performance, and sealed waterproof structures. They are often integrated with precision encoders and waterproof motor controllers to ensure accurate positioning under underwater operating conditions.
Although these motors may not always have standardized public model numbers, their specifications are well suited for underwater manipulation and control tasks in Taiwanese research and industrial projects.
Why These Brushless Motors Are Popular in Taiwan
Taiwan has a strong foundation in precision manufacturing, automation, and robotics engineering. As a result, underwater robot developers tend to favor brushless motor solutions that are reliable, customizable, and easy to integrate.
Key advantages include:
Waterproof designs achieved through oil-filled sealing or precision bearing systems, suitable for long-term underwater use
Flexible voltage, KV, and power options supporting both compact ROVs and larger AUV platforms
Compatibility with standard ESCs and control interfaces, simplifying integration with flight controllers or onboard computers
Stable speed control and responsiveness that support advanced motion control algorithms
These factors make brushless motors an ideal choice for Taiwan’s diverse underwater robotics applications.
Practical Tips for Brushless Motor Selection
When selecting brushless motors for underwater robots, several practical considerations are important:
Thrust requirements: Small research or educational robots can operate efficiently with 300–400 W class motors, while industrial ROVs require significantly higher thrust levels.
Power system compatibility: Ensure the motor voltage matches the onboard battery system, commonly 24 V or 36 V, while balancing energy density and endurance.
Waterproof structure: Motors should meet IP68 or higher protection standards and be used with properly sealed thruster housings.
Control interfaces: Motors compatible with standard PWM or CAN-based ESCs allow easier system expansion and control integration.
Conclusion
Taiwanese underwater robots widely rely on brushless motors for both propulsion and motion control. From M080, SW2820, and T200 thruster motors to custom-designed brushless joint motors, these models form the backbone of reliable underwater robotic systems. Their efficiency, durability, and adaptability make them well suited for scientific research, industrial inspection, and advanced underwater operations. As underwater robotics continues to evolve, brushless motor technology will remain a core component supporting deeper, more complex, and more demanding underwater missions.