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VideoRay underwater robot escorts the world’s busiest ports and waterways

Port security surveillance, mine countermeasures and underwater search and rescue are all very dangerous tasks that should no longer endanger lives and ship safety. Where continuous mission-critical underwater inspection or exploration is required, underwater vehicles (ROVs) are the safest and most efficient way to maintain safety, support salvage efforts and uncover the secrets of the ocean.

Figure 1 VideoRay Defender is an underwater vehicle (ROV) that requires a robust high-density power supply network (PDN) to provide strong thrust for sharp maneuverability in the most challenging conditions.

ROVs with video are able to stay in inaccessible, extremely deep underwater locations for longer periods of time. To improve efficiency, ROVs require a robust, high-density power supply network (PDN) that not only allows the required thrust to withstand moving ocean currents, but also provides a stable view of the environment while giving the payload space to complete mission-specific work .

The VideoRay tethered underwater robot is powered by the host platform or ship and can be deployed to a depth of 305 meters (2000 meters in floating mode) to perform 365-day all-weather missions. In addition, there is a battery-operated ROV in development that will last up to 8 hours underwater, allowing the use of thinner, lighter tethers specifically for video and communications transmission.

suitable for all tasks

Among VideoRay’s many innovations is an interchangeable, modular ROV system that resides in a single intelligent network. The system provides a very flexible and customizable platform that can be easily adapted to specific missions, markets and payloads.

VideoRay ROVs are engineered to perform tough tasks with constraints on size, weight and speed of deployment. Additionally, they feature powerful thrust, longer tethers, higher resolution video, and interchangeable modular systems.

Easily scalable for payload and mission-specific protocols

To achieve advanced ROV capabilities, VideoRay needed an advanced power supply network architecture that would allow them to design smaller ROVs that provide greater power and maneuverability in deeper water. Among the many effective design factors, the modularity and power density of the airborne power supply components are the key factors that help VideoRay’s scalable ROV product family (which facilitates flexible access to high-performance modules) to adapt to changing needs at higher speeds and facilitate customization for customers. The key to ROV.

With the Vicor solution’s features that reduce the need for bulky cooling systems and EMI filtering systems, VideoRay is able to meet stringent requirements for power density, efficiency, and low EMI noise, enabling a compact, power-dense system design that is ideal for other value-added components. Efficient heat dissipation while preserving valuable board space.

Delivering high-performance power for tough tasks

The highly modular VideoRay flagship Defender Series ROV features Vicor DCM™ series converters to generate lower voltage power from 400VDC to power all main thrusters and control electronics inside the underwater drone. The DCM series of DC-DC converters are ideal candidates for the Defender series as they require high power density in a small package with integrated monitoring and automatic shutdown. The DCM series is suitable for a wide input voltage range, thus allowing high dropout voltages on longer tethers.

The high-efficiency, fixed-ratio Vicor BCM® bus converter used in the VideoRay Pro 4 main controller unit converts the on-board 400V to a lower voltage that is tethered to the ROV, enabling control in a compact, low-noise manner and communication. High voltage BCM modules in side-to-side power converters help generate tie-line voltage for advanced cooling and active cooling for easy thermal management in a waterproof enclosure.

The BCM utilizes Vicor’s proprietary Sine Amplitude Converter (SAC) topology, a resonant tank-based, extremely efficient DC-DC converter architecture that enables bidirectional fixed-ratio DC-DC conversion. Some BCMs also feature integrated PMBus® telemetry, control, and EMI filtering, with input voltages ranging from 36 to 800 volts and a wide variety of K-factor transformations to support a wide range of applications. Not only can the BCM achieve a peak efficiency of 98% and achieve a power density of 2,400W/in³, but it can also parallelize its inputs into high-power arrays and outputs in series and/or parallel to achieve higher output voltages and/or higher output voltages than individual modules. current.

For battery powered ROVs, VideoRay is using Vicor’s high power, high density, 97% efficient PRM™ buck-boost converters to provide constant current and constant voltage control for battery management. The PRM buck-boost regulator uses a zero-voltage switching (ZVS) architecture that not only supports a wide input voltage range, but also provides an adjustable regulated output voltage.

With Vicor power modules, VideoRay’s growing ROV product portfolio can be easily expanded to meet evolving needs. The combination of VideoRay and Vicor has achieved innovation in the high-density modular power supply network architecture, helping VideoRay to develop more powerful and smaller ROVs that can work 24/7 in the deep sea.