Patent ID: 7288922

Claim:
An electric generator temperature detecting device for detecting a temperature of an electric generator, comprising: a control apparatus temperature detector configured to detect a temperature of a control apparatus, which is electrically connected to an electric generator including an exciting winding and controls supply of an exciting current to the exciting winding, and output a control apparatus temperature signal representative of the detected temperature of the control apparatus; a rotational speed detector configured to detect a rotational speed of the electric generator and output a rotational speed signal representative of the detected rotational speed; an exciting current detector configured to detect the exciting current supplied to the exciting winding of the electric generator and output an exciting current signal representative of the detected exciting current; and an electric generator temperature determiner configured to determine a temperature of the electric generator based on the control apparatus temperature signal from the control apparatus temperature detector, the rotational speed signal from the rotational speed detector, the exciting current signal from the exciting current detector, and an output voltage of the electric generator and output an electric generator temperature signal representative of the determined temperature of the electric generator.