P3TP – power convertor 28V / 3kW

P3TP convertor is a source of electrical energy intended for a 28 VDC electrical power system of small aircrafts. The whole system consists of turboprop (TP100) or turboshaft (TS100) engine, which drives the three-phase highspeed generator its output is converted by the P3TP convertor to 28 VDC with the power of up to 3 kW. P3TP is designed to be used with generator and engine (TP100 / TS100) produced by the company PBS Velká Bíteš, a.s., Czech Republic.

Basic features:
  • SMPS control based on analog circuit design (no SW involved in power generation functionality; SW partly involved in monitoring and CAN communication),
  • output power limitation according to engine’s speed,
  • cooled by the airflow of the suck air of the engine,
  • constant current at overload (current limitation),
  • controls the external contactor (disconnects the convertor from DC BUS in case of failure),
  • monitoring – light indicators plus CAN communication,
  • output voltage complies with MIL-STD-704F standard,
  • environmental resistance compliant with RTCA DO-160G standard.
Technical parameters:

Input 3 ph. voltage (from generator): 3x (30 ÷ 80) VAC,SD
Frequency of input voltage: up to 3 500 Hz
Output voltage: 28.5 V DC
Output power: 3 000 W (~105 A DC)
Ambient temperature: -45°C ÷ 70°C
Dimension (including heatsink) (L x W x H): 250 x 190 x 100 mm
Weight: 3,5 kg

  • Over-current protection (short-circuit protected),
  • over-temperature protection (adjustable threshold for warning),
  • protected against DC bus failure (automatically disconnected by a contactor),
  • under- and over-speed of engine,
  • build-in tests and monitoring.
  • Actual output voltage and output current and actual engine speed rpm,
  • actual convertor’s temperature (light indication if over-temperature),
  • all important data are transmitted to CAN,
  • light indication if voltage not sufficient for battery charging,
  • light indication if over-loaded,
  • light indication if convertor off or disconnected.