KDE-UAS125UVC is an electronic speed controller that regulates electrical power supplied to a brushless propulsion motor. Continuous power is 6475 W. It links the propulsion motor to its power source and flight-control command path in an aircraft installation.
KDE-UAS125UVC is an electronic speed controller from KDE Direct for brushless motors in multirotor uncrewed aircraft. Sold as the HE edition, it regulates power from the battery to the motor on 4S LiPo to 14S LiHV systems and is sized for commercial and industrial UAS platforms.
The controller is rated for 125 A continuous for 180 seconds and 220 A peak for 5 seconds. These correspond to 6,475 W continuous and 11,395 W peak power. The supply range is 14.8 V to 60.9 V. The continuous rating holds at full throttle only with airflow of 5 mph or more across the heatsink, so integrators should place the unit in the propeller wash or add cooling. Over-temperature protection limits RPM when the case exceeds 95 C. The refresh rate is 600 Hz with an adaptive range of 50 Hz to 600 Hz, and the maximum speed is 360,000 rpm for a two-pole motor.
The all-aluminium 6061-T6 case carries an IP66 rating for all-weather use. The unit measures 46 mm by 108 mm and weighs 172 g, or 220 g with wires and bullet connectors. Power and motor leads are 10 AWG rated to 200 C. There is no internal BEC, so a separate UBEC or regulator must supply auxiliary electronics.
On the control side, the ESC accepts PWM with automatic signal recognition and offers a CAN bus port on a four-pin JST connector. CAN supports live telemetry to the flight controller and additional control signals, using the KDECAN protocol or DroneCAN. A micro-USB port is used for configuration with KDE Direct Device Manager software and for downloading logs. An onboard EEPROM records voltage, current, temperature, throttle input, throttle output and electrical RPM. The CAN port is non-isolated and the control lead is opto-isolated.
Further functions include regenerative braking for quick response to deceleration commands, temperature-controlled synchronous rectification, motor start-up synchronization, anti-spark circuitry for connector protection and active monitoring of voltage, current, temperature and stall. KDE Direct lists the product as not NDAA compliant.
Typical applications are multirotor platforms for inspection, aerial photography, mapping, delivery and other commercial UAS work, paired with KDE Direct brushless motors.
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