Active Integrated Rectifier Regulators (AIRR)

The demand for increased power generation in cars is creating the need for active rectification to dramatically reduce power losses. Active rectification has been discussed for a long time, but only recently has the development in advanced FETs made the concept feasible. The performance of active rectifiers with state-of-the-art FETs offers a large benefit with standard alternators manufactured today, with up to 25% more output power at idle speed.

Selecting an active integrated rectifier regulator significantly reduces the amount of investment necessary to bring a higher power systems to market. Auto SBU manufactures the first AIRR in production today delivering up to 200A output current at idle speed and 320A at high RPM and can withstand 525A for 20s.

The AIRR combines a regulator with an active rectifier in one and the same module. On a simple level, active rectification is just the replacement of passive diodes with active power MOSFETs. The rectifier consists of a patent-pending transistor bridge rectifier concept, which can be adapted to customer specific designs to allow for better performance, higher efficiency, and an improved reliability over conventional solutions.

KSR features include synchronous operation, load dump strategy for a centralized suppression, and controlled regulation including communication exchange with the engine control unit. The configuration can be adapted to suit delta-wound as well as wye-wound generator configurations.


KSR is an industry leader in the design, engineering and manufacture of an array of products for the transportation industry (autos, light trucks, ATVs), including automotive sensors, electronic throttle controls, adjustable and fixed pedals, electric steering control units and power modules.

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