Balluff-Leuze semi-potted wind power supply

An intelligent, energy-saving power supply especially for use in wind energy equipment is now available.

The semi-potted device with an efficiency rating of 93% is designed for high shock and vibration loads and a long service life of nearly 20 years with a MTBF of 800,000 h.

A key feature is that this is said to be the first power supply that can be connected directly to the generator voltage without need for an intermediate transformer. Optical indicators display the status and condition of the unit. Since it tracks dynamic loads, it can be operated continuously even under high load conditions. This makes reserves of from 30 to 50% no longer needed.

Special sensors in combination with a microcontroller continuously monitor wear factors in the supply such as temperature, overload, faults and other conditions. Intelligent evaluation of these parameters then gives the user an overview of the status of the unit for implementing maintenance.

Coloured LEDs in traffic light colours provide the user with continuous information about the current load level, the ‘stress level’ as well as the lifetime, a forecast of remaining life expectancy. The indicators are bright enough to be seen from several metres away.

For the first time ever, says the company, the usual three-phase transformer used in wind power equipment can be dispensed with. Its broad input range of 380 - 690 V allows the switched-mode power supply to be connected directly to the generator voltage of the turbine.