Load Emulators for Testing of Power Supplies - A Review

All newly designed power electronic equipments are to be tested as per the standards, so as to verify the response of the equipment under various load conditions. For this, different linear, non-linear and dynamic loads are to be applied to the equipment in accordance with the applications. Load emulation is the process by which the actual load is replaced by a flexible system which can mimic the characteristics of the actual load. A regenerative operation can be implemented in power electronic emulators. Thus by using load emulators for testing, the energy lost in testing of equipments can be reduced to a great extent. Here a review of various types of load emulators is presented which are intended for various types of applications along with some experimental results obtained in various research studies.