Knowledge

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...

FOC (Field Oriented Control) is an advanced motor control technology for brushless motors. By precisely controlling torque and magnetic field components, FOC delivers low noise, high efficiency, reduced heat generation, and extremely smooth power output. In underwater propulsion systems—especially for ROVs, AUVs, USVs, and other professional underwater platforms where stability and reliability are critical—FOC control is rapidly becoming the mainstream solution. When combined with APISQUEEN Beluga 24V 30A / 24V 50A FOC ESCs and the APISQUEEN 24V U92 Pro Underwater Thruster, users can experience significantly improved low-speed control, acoustic performance, and overall energy efficiency in real-world underwater applications. 1. How...

In recent years, an increasing number of universities worldwide have invested in the independent research and development of ROVs (Return-on-Vehicles). From engineering and marine colleges to laboratory teams, various universities are establishing ROV projects for marine exploration, scientific research, technical teaching, and competitions. So, why are universities increasingly inclined to build their own ROVs instead of purchasing off-the-shelf equipment? This article breaks down the reasons in detail and includes a recommendation of suitable thruster models for university laboratories at the end. I. Why are universities starting to develop their own ROVs? 1. Lower R&D costs and greater controllability through self-developmentIn...