Output control device of generation device

An output control device of a generation device for controlling an output of the generation device that supplies power to a DC load including voltage accumulation means using an AC generator including a rotor having a magnetic field and a stator having an armature winding comprised of polyphase coils as a power supply, comprising:

• a rectifier circuit that has a plurality of input terminals to which an output of said armature winding is input and a pair of output terminals connected across said voltage accumulation means, converts an AC voltage input to said input terminals into a DC voltage, and outputs the DC voltage from said output terminals;
• an inverter circuit having DC terminals and AC terminals connected to the output terminals and the input terminals of said rectifier circuit;
• and
• a control portion having inverter control means that controls said inverter circuit to convert a voltage across the voltage accumulation means connected across the output terminals of said rectifier circuit into an AC control voltage having the same number of phases and the same frequency as the output of said generator, and supply said AC control voltage from said AC terminals to said armature winding,
• wherein said control portion includes maximum output current phase detection means for detecting a phase of a phase current of said armature winding as a maximum output current phase,
• a range of change in a rotational speed of said generator is divided into an output current increasing area in which an output current of said generation device can be increased more than an output current of said generation device when no AC control voltage is applied to said armature winding by delaying a phase of said AC control voltage, and an output current nonincreasing area in which the output current of said generation device cannot be increased more than the output current of said generation device when no AC control voltage is applied to said armature winding even by delaying the phase of said AC control voltage,
• said inverter control means includes means for arithmetically operating a target phase of said AC control voltage required for changing an output voltage of said generator in a direction of the output voltage of said rectifier circuit approaching a target voltage, and is comprised so as to control said inverter circuit so that a phase of the AC control voltage applied to said armature winding is equal to the arithmetically operated target phase when the rotational speed of said generator is in said output current increasing area and the arithmetically operated target phase is advanced with respect to a determination phase preset within a range in which the phase is not delayed with respect to said maximum output current phase, the phase of the AC control voltage applied to said armature winding is equal to the arithmetically operated target phase when the rotational speed of said generator is in said output current increasing area and the arithmetically operated target phase is delayed with respect to said determination phase and advanced with respect to said maximum output current phase, the phase of the AC control voltage applied to said armature winding is equal to said maximum output current phase when the rotational speed of said generator is in said output current increasing area and the arithmetically operated target phase is delayed with respect to said determination phase and equal to or delayed with respect to said maximum output current phase, the phase of the AC control voltage applied to said armature winding is equal to the arithmetically operated target phase when the rotational speed of the generator is in the output current nonincreasing area and the arithmetically operated target phase is advanced with respect to said maximum output current phase, and the phase of the AC control voltage applied to said armature winding is equal to said maximum output current phase when the rotational speed of said generator is in said output current nonincreasing area and the arithmetically operated target phase is equal to or delayed with respect to said maximum output current phase, thereby controlling the output voltage of said rectifier circuit to approach said target voltage, and
• said determination phase is determined so that the output of said generator is always increased when the rotational speed of said generator is in said output current increasing area and the phase of the AC control voltage applied to said armature winding is delayed within a range not exceeding said determination phase.