Modified APC Strategy for Doubly Salient Electro-Magnetic Generator With Controlled Rectifier Considering Dramatic Load Changes

The output voltage of the traditional diode-rectified doubly salient electro-magnetic generator (DSEG) system will change significantly when the load current changes rapidly. Besides, it’s difficult to regulate the output voltage by adjusting the field current because of the large time constant. In order to solve the problem, a modified angular position control (APC) strategy based on the controllable rectifier DSEG system is proposed. Using the back propagation neural network (BPNN) to predict proper switching angles according to the speed and field current, the improved APC strategy is helpful to slow down the charge and discharge process of the capacitor and greatly reduced the output voltage fluctuation. Finally, the effectiveness of the proposed strategy is proved by simulations on a 6/4 pole DSEG with controlled rectifier.