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When choosing an underwater thruster, many users find themselves torn between the AQ1020 and its upgraded version, the AQ1121. On the one hand, the AQ1020 delivers a thrust of up to 24 kg at 48V, which is even higher than the AQ1121’s 21 kg;on the other hand, the AQ1121 is marketed as the ‘upgraded version’. 👉 So the question arises:What exactly has been upgraded in the AQ1121? Is it worth choosing? This article will help you fully understand the differences between the two by examining thrust, the control system (FOC), real-world user experience and application scenarios. Product Overview AQ1020 Underwater...

Chapter 1: Introduction to the Modbus Protocol The Modbus protocol is a universal language used in electronic controllers. Through this protocol, controllers can communicate with one another, and controllers can communicate with other devices via a network (such as Ethernet). It has become a universal industrial standard. With it, control devices produced by different manufacturers can be connected into an industrial network for centralised monitoring. This protocol defines a message structure that a controller can recognise and use, regardless of the type of network through which communication takes place. It describes the process by which a controller requests access to...

How to Choose the Right Underwater Thruster for Your Project With the development of water recreation, electric boats, and underwater robotics technologies, underwater thrusters are becoming a core power component in an increasing number of projects. Whether it's kayaks, small boats, or ROV underwater robots, electric underwater thrusters offer significant advantages such as quiet operation, high efficiency, ease of control, and simple maintenance. I. What is an underwater propulsion device? An underwater propulsion system is an electric propulsion device that generates forward or backward propulsion by pushing against water. A complete underwater propulsion system typically includes: a brushless motora propellera...

1. What is KV Value? The KV value (RPM / Volt) represents the number of revolutions per minute (RPM) the motor will theoretically increase for each volt of electrical input under no load. For example: 300KV motor:12V × 300 ≈ 3600 RPM 1000KV motor:12V × 1000 ≈ 12000 RPM Note:KV value is not power and does not directly equal thrust. It simply reflects the motor's speed characteristics. 2. The Relationship Between KV Value and Thrust ✅ Key Conclusion:In underwater thruster applications, low KV motors are typically better for generating greater effective thrust. In real-world applications, we find that most ROVs...

Corrosion is one of the most common causes of performance loss and failure in underwater thrusters. Whether used in ROVs, AUVs, marine robots, or underwater inspection systems, prolonged exposure to water—especially seawater—can significantly shorten the service life of underwater thrusters if corrosion is not properly managed. In this article, we explain why corrosion occurs, which components are most vulnerable, and practical methods to prevent corrosion in underwater thrusters, helping you improve reliability and reduce maintenance costs. Why Corrosion Occurs in Underwater Thrusters Underwater thrusters operate in a harsh environment where multiple factors accelerate corrosion: Saltwater exposure (high chloride content) Electrochemical...