초록 ▼

A charging system has an alternator, a battery, and a controlled rectifier bridge between the alternator and the battery. The controlled rectifier bridge has controllable elements. A controller is provided wherein the controller controls (a) the duty cycle of the alternator field winding and (b) the

A charging system has an alternator, a battery, and a controlled rectifier bridge between the alternator and the battery. The controlled rectifier bridge has controllable elements. A controller is provided wherein the controller controls (a) the duty cycle of the alternator field winding and (b) the switching in the controllable elements to control the phase advance angle. By utilizing a half-wave controlled rectifier bridge and three controllable elements, power output can be increased at a low overall cost. In another embodiment, the controller determines switching points for the controllable elements through a third harmonic extraction device which employs a neural network for determining the zero crossings of the third harmonic voltage obtained from a single phase voltage.

대표청구항 ▼

[ What is claimed is:] [15.]15. A charging system comprising:an alternator;a battery;a controlled rectifier bridge having controllable elements, the bridge being connected between the alternator and the battery; anda controller; anda third harmonic extraction device for determining the zero crossing

[ What is claimed is:] [15.]15. A charging system comprising:an alternator;a battery;a controlled rectifier bridge having controllable elements, the bridge being connected between the alternator and the battery; anda controller; anda third harmonic extraction device for determining the zero crossings of the third harmonic voltage;wherein the controller controls the switching of the controllable elements of the controlled rectifier bridge to control the phase advance angle of the controllable elements in response to the zero crossings of the third harmonic provided by the third harmonic extraction device.