
過酷な水中ミッションに対応するモジュールで構成する水中ドローン (ROV)
Robotics solutions and case studies
Case study: Tethered Underwater ROV
Allowing an underwater ROV to perform remote inspection activities at greater depths required the tether from the ship-based power source be extended. Distributing the original design’s low voltage over the longer tether was not practical due to voltage drops. Moving to a high-voltage 700V low-loss tether, however, required conversion to a lower SELV voltage onboard the ROV. This typically requires a custom converter that takes up space and adds weight, not feasible in an ROV that needs to be able to carry increased payloads. The key goals were:
The extremely small, low weight BCM® Bus Converter, acting as a DC-DC transformer, converted the high voltage from the tether down to the 48V distribution architecture on board the ROV. It provided a simple, easy to implement, off-the-shelf solution. Key benefits were:
The power delivery network: The BCM isolated and stepped-down the high tether voltage input to a nominal 48V, a factor of 1/16. Output was 1.5kW in a footprint of just 39cm2. The BCM provided enough power to drive 48V motors, thrusters and control electronics. Its high efficiency simplified the cooling within the vehicle. ZVS Buck regulators converted the 48V SELV distribution to 5V and 3.3V to power downstream points-of-load. To analyze this power chain, go to the Vicor Whiteboard online tool.
入力電圧: 12V (8 – 18V), 24V (8 – 36V), 48V (30 – 60V)
出力電圧: 1 – 16V
出力電流: 最大22A
ピーク効率: 最大98%
10.0 x 10.0 x 2.5mm 他