Knowledge

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...

Why is thrust selection important? Higher thrust doesn't necessarily mean better performance.Appropriate thrust should be matched to the ship's weight, speed requirements, operating environment, and battery capacity. Too little thrust → "Slow to move, drifts in wind, difficult against currents"Too much thrust → "High power consumption, short range, difficult to control, wasteful costs" Choosing the right thrust is choosing the balance between power and efficiency. 1.How to quickly estimate thrust requirements? Empirical guidelines: Smooth cruising: 25–30 kg boat weight ≈ 1 kg thrust Upstream, high speed: 20 kg boat weight ≈ 1 kg thrust Examples: 150 kg kayak → 5–8 kg...