Title :
A new control method for 400 Hz ground power units for airplanes
Author :
Jensen, Uffe Borup ; Rasmussen, Morten Peter ; Mortensen, Tonny ; Blaabjerg, Frede ; Pedersen, John K.
Author_Institution :
Axel Akerman A/S, Odense, Denmark
Abstract :
A new control strategy for a ground power unit (GPU) is proposed, 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 PWM-modulator and a voltage controller in the synchronously rotating reference frame (d-q). Design rules 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.
Keywords :
PWM power convertors; aerospace computing; aircraft control; aircraft power systems; aircraft testing; control system analysis; control system synthesis; digital control; power supplies to apparatus; switching circuits; synchronisation; voltage control; 400 Hz; 90 kVA; PWM-modulator; airplane ground power units; control design; control performance; control simulation; control strategy; d-q reference frame; digital voltage controller; electric loads; fundamental frequency; high-output performance; switching frequency; synchronization; synchronously rotating reference frame; Airplanes; Airports; Digital control; Frequency conversion; IEEE members; Power harmonic filters; Power supplies; Pulse width modulation; Switching frequency; Voltage control;
Conference_Titel :
Industry Applications Conference, 1998. Thirty-Third IAS Annual Meeting. The 1998 IEEE
Conference_Location :
St. Louis, MO, USA
Print_ISBN :
0-7803-4943-1
DOI :
10.1109/IAS.1998.730336