Regulated or Unregulated - AI² Transformer Rectifiers convert 115/200VAC three phase 400Hz power to Mil-Std-704 quality DC power. Standard off-the-shelf units operate in the most stringent environments and are qualified to military standards for mission critical equipment. Applications for TRUs (Transformer Rectifier Units) range from military and commercial transport aircraft to fighters, trainers and helicopters.

Internally fan-cooled and natural free-air convection models are available with nominal output current ratings from 50A to 400A. The standard Transformer Rectifier Unit design includes an isolated twelve pulse rectification scheme, generating a high input power factor and low reflected input line current harmonics. High efficiency, simplified cooling and ease of maintenance are achieved with the use of Schottky hybrid diode arrays.

Regulated output transformer rectifier units provide excellent output voltage regulation for varying line and load conditions. Units are well suited for powering 28VDC busses that include emergency back-up batteries. Regulated Transformer Rectifiers exhibit the inherent benefits and simplicity of a standard TRU, while providing power supply-like output regulation. High overload, low EMI, low parts count and high reliability are standard features of the AI² Regulated TRU. In the event of a loss of the internal regulating circuit, units will revert to standard TRU operation. Regulated transformer rectifier units are available with output current ratings from 50A to 400A.