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A new control method for 400-Hz ground power units for airplanes

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3 Author(s)
Jensen, U.B. ; AXA Power AG, Odense, Denmark ; Blaabjerg, F. ; Pedersen, J.K.

This paper presents a new control strategy for a ground power unit, which is used for airplanes on the ground. In such a system, the ratio between the switching frequency and the fundamental frequency is low and in order to obtain high output performance, the controller has to be digital. The control is performed by a pulsewidth modulator and a voltage controller in the synchronously rotating reference frame (d-q). Design roles are given and a simulation tool is used for investigation of the controller. A 90 kVA prototype is used for validation of the principle. It is concluded by the experiments that the new controller gives a high output performance both stationary and dynamically at linear and nonlinear loads. Synchronization with the airplane is also shown to work successfully

Published in:

Industry Applications, IEEE Transactions on  (Volume:36 ,  Issue: 1 )