Power supply
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Currawong ENGINEERING Corvid 250W Power Supply CE1000 Datasheet Description The Corvid 250W power supply provides up to 250 Watts of on-board electrical power generation for small to medium-sized UAVs. A brushless DC (BLDC) motor is driven by the aircraft's primary power plant, or alternatively an auxiliary power unit. This is usually an internal combustion engine which can simultaneously provide both propulsion and on-board electrical power. The power supply features an internal starter module which allows remote starting of the propulsion system. The 250W power supply simplifies UAV power distribution by providing multiple power outputs, which are individually programmable for voltage as well as being battery-backed. Dual (redundant) battery support is also included as standard. Electrical specifications Features • Buck-boost converter allows electrical power generation over 4:1 RPM range. • Outputs are battery-backed and switchable (on/off) via hardware signal or remotely via command. • Dual (redundant) battery support. The power supply includes two independent and identical battery chargers. Supported battery types include: o LiPo: 5S, 6S • Industry-standard 28 VDC output (available during power generation and when the power supply is connected to umbilical power). • RS232 and CAN control and monitoring interfaces provide extensive monitoring and reporting of voltages, currents, battery charge status and temperatures. Engine starter may be activated locally via a momentary push-button switch, or remotely via RS232 or CAN interface to facilitate in-flight engine restarting

Currawong ENGINEERING Corvid 250W Power Supply CE1000 Datasheet Key Technology - active rectification The first step in turning high-voltage AC into regulated DC is rectification. This process is traditionally performed using a diode bridge, which is an inefficient device that wastes some potentially useful power as heat. Active rectification replaces the diodes with FETs, which have lower loss than either Silicon or Schottky diodes. As can be seen from Figure 2, there is up to 90% reduction in the power lost in the rectification process when an active rectifier is used. This translates...