초록 ▼

An output control device of a generation device including: a rectifier circuit that rectifies an output of an AC generator and applies the output across a battery; an inverter circuit provided between the battery and the generator; inverter control means for controlling the inverter circuit to conve

An output control device of a generation device including: a rectifier circuit that rectifies an output of an AC generator and applies the output across a battery; an inverter circuit provided between the battery and the generator; inverter control means for controlling the inverter circuit to convert a voltage across the battery into an AC control voltage and apply the voltage to an armature winding of the generator; and phase detection means for detecting a phase of a phase current flowing through the armature winding of the generator as a maximum output current phase, wherein the inverter control means is comprised to control a phase of the AC control voltage so as not to be delayed with respect to the maximum output current phase, and thus prevent a reduction in the output of the generator caused by an excessive delay of the phase of the AC control voltage.

대표청구항 ▼

What is claimed is: 1. 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 com

What is claimed is: 1. 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, and 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 arithmetically operated target phase is advanced with respect to said maximum output current phase, while the phase of the AC control voltage applied to said armature winding is equal to said maximum output current phase when 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. 2. 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. 3. The output control device of a generation device according to claim 1, further comprising: a signal generator that generates a signal including information on a rotational angle position of said rotor when the rotational angle position of the rotor of said generator matches a predetermined position; a current sensor that detects a phase current of said generator; and a zero cross detection circuit that detects a zero cross point of said phase current from the output of said current sensor, wherein said maximum output current phase detection means is comprised so as to detect a phase of said phase current from a timing of said signal generator generating the signal and the zero cross point of the phase current detected by said zero cross detection circuit. 4. The output control device of a generation device according to claim 2, further comprising: a signal generator that generates a signal including information on a rotational angle position of said rotor when the rotational angle position of the rotor of said generator matches a predetermined position; a current sensor that detects a phase current of said generator; and a zero cross detection circuit that detects a zero cross point of said phase current from the output of said current sensor, wherein said maximum output current phase detection means is comprised so as to detect a phase of said phase current from a timing of said signal generator generating the signal and the zero cross point of the phase current detected by said zero cross detection circuit. 5. The output control device of a generation device according to claim 1, wherein said inverter circuit is comprised of a bridge type circuit with arms of a bridge being comprised of MOSFETs, said control device further comprises: a pulse signal generator that generates a pulse when a rotational angle position of the rotor of said generator matches a predetermined position; a voltage sensor that detects a voltage between the drain and source of a MOSFET that constitutes one arm of the bridge of said inverter circuit; and a zero cross detection circuit that detects a timing of an output of said voltage sensor changing from a high level to a zero level as a zero cross point of said phase current, and said maximum output current phase detection means is comprised so as to detect a phase of said phase current from the timing of said signal generator generating the signal and the zero cross point of the phase current detected by said zero cross detection circuit, and said inverter control means is comprised so as to determine that maximum output current phase control is performed for making the phase of the AC control voltage applied to said armature winding equal to the detected maximum output current phase when a difference between the phase of the present AC control voltage and the maximum output current phase detected by said maximum output current phase detection means is within a predetermined range, and advance said AC control voltage by a predetermined phase when a state where it is determined that the maximum output current phase control is performed lasts for a predetermined time. 6. The output control device of a generation device according to claim 2, wherein said inverter circuit is comprised of a bridge type circuit with arms of a bridge being comprised of MOSFETs, said control device further comprises: a pulse signal generator that generates a pulse when a rotational angle position of the rotor of said generator matches a predetermined position; a voltage sensor that detects a voltage between the drain and source of a MOSFET that constitutes one arm of the bridge of said inverter circuit; and a zero cross detection circuit that detects a timing of an output of said voltage sensor changing from a high level to a zero level as a zero cross point of said phase current, said maximum output current phase detection means is comprised so as to detect a phase of said phase current from the timing of said signal generator generating the signal and the zero cross point of the phase current detected by said zero cross detection circuit, and said inverter control means is comprised so as to determine that maximum output current phase control is performed for making the phase of the AC control voltage applied to said armature winding equal to the detected maximum output current phase when a difference between the phase of the present AC control voltage and the maximum output current phase detected by said maximum output current phase detection means is within a predetermined range, and advance said AC control voltage by a predetermined phase when a state where it is determined that the maximum output current phase control is performed lasts for a predetermined time.