New Power Solutions for Tethered Drones

We proudly introduce our latest generation of specialized power supply solutions for tethered drone systems (TDS) – the JETNA-H-LP (3ph. AC/DC), JETA-H-LP (1ph. AC/DC) and JETDH-LP (DC/DC) series.

JETNA-H-LP or JETA-H-LP is to be placed in the on-land part of the TDS. Fed from 3-phase or 1-phase AC mains and providing various levels of high voltage DC output  – 200-400 VDC. The DC voltage is transferred via cable over length of hundreds of meters to the tethered drone. There, on-board (aerial) power supply units JETDH-LP receive the high voltage and then provide low voltage output to the on-board electronics.  

Naturally, the series may be used separately. Both series may be controlled to provide flexibility of operation and accommodation to the immediate TDS needs. 

Thanks to continuous power supply, tethered drones can cover large areas without interruptions for recharging. The TDS may be equipped with various sensors and devices, as per needs of the customer, to gather data, monitor surroundings etc. This can bring benefits in both defence and industrial sector.  

1. Ultra-Compact, High-Power Density

• JETA-H-LP series (1ph. AC/DC): up to 3000 W power output, up to 94% efficiency, ultra-low-profile of 39 mm
• JETNA-H-LP series (3ph. AC/DC): up to 6000 W power output, up to 94% efficiency, ultra-low-profile of 39 mm.

• JETDH-LP series (DC/DC): up to 5000 W with similar efficiency (up to 94%), conduction cooled, optimized for drone structures.

The CNC-milled aluminum casings offer minimal dimensions, reduced weight and saving space for both drone payload capacities and mobility of ground systems.

2. Extreme Conditions

• Operational in harsh environmental conditions with temperature range as wide as from –60°C to +95°C.

• Polymer compound potting provides protection against shocks, vibrations (MIL-STD-810F compliant) and moisture exposure (5-95% relative humidity, non-condensing).

• Typical MTBF exceeding 100,000 hours at nominal operating conditions (T_case = 25°C) ensures long-term reliable operation

3. Electrical Performance and Cable Efficiency

• Designed to reduce tether cable thickness and weight by employing high-voltage outputs (200-400 VDC)

• Broad input voltage ranges:

  • AC/DC units:

    • 1-phase 184-264 VAC (or DC equivalent 230-370 VDC)
    • 3-phase 323-440 VAC (or DC equivalent 390–620 VDC)

  • DC/DC units: 340-400 VDC or 390–620 VDC

• Offering ±0.5% regulation against input fluctuations and ±1% against load variations.

• Minimal ripple and noise (less than 1% peak-to-peak over 20 MHz bandwidth).

4. Optimized Thermal Efficiency and Cooling Options

• Units are optimized for efficient conductive cooling, supplemented by forced air or passive convection cooling methods, adaptable to various deployment conditions.

• Internal thermal protections automatically trigger at +95°C (DC/DC) and +85°C (AC/DC), safeguarding systems under heavy load.