초록 ▼

A generation device, having a magneto generator, in which an AC control voltage is applied from a battery charged with a rectified output of the magneto generator to an armature winding of the generator through an inverter to control a battery voltage to a limit value or less, comprising: fixed poin

A generation device, having a magneto generator, in which an AC control voltage is applied from a battery charged with a rectified output of the magneto generator to an armature winding of the generator through an inverter to control a battery voltage to a limit value or less, comprising: fixed point detection means for detecting a fixed point on a waveform of a phase current of the generator; phase current phase detection means for detecting a phase angle of the fixed point in relation to a reference phase; arithmetical operation means for arithmetically operating timing for generating the AC control voltage with reference to the phase of the fixed point; and inverter control means for controlling switch elements of the inverter so as to generate the AC control voltage at the timing arithmetically operated by the arithmetical operation means.

대표청구항 ▼

What is claimed is: 1. A generation device comprising: a magneto generator including a rotor having a magnetic field and a stator having an n-phase (n is an integer equal to or larger than one) armature winding; an n-phase voltage type inverter including n-phase bridge-connected switch elements and

What is claimed is: 1. A generation device comprising: a magneto generator including a rotor having a magnetic field and a stator having an n-phase (n is an integer equal to or larger than one) armature winding; an n-phase voltage type inverter including n-phase bridge-connected switch elements and feedback diodes connected in anti-parallel with the switch elements, and having an AC terminal connected to an output terminal of said armature winding and DC terminals between which voltage accumulation means and a load are connected in parallel; and a controller that controls said inverter so as to apply an n-phase AC control voltage having the same output voltage and frequency as said magneto generator and having a predetermined phase angle in relation to a preset reference phase from said voltage accumulation means to said armature winding through said inverter to perform control to maintain a voltage across said voltage accumulation means at a limit value or less, wherein said generation device further comprises a current detector that detects a phase current of said magneto generator, and said controller comprises: fixed point detection means for detecting a fixed point on a waveform of said phase current; phase current phase detection means for detecting a phase angle of the fixed point on the waveform of the phase current detected by said fixed point detection means in relation to said reference phase; control voltage generation timing arithmetical operation means for arithmetically operating timing for generating said AC control voltage with reference to the phase of the fixed point on the waveform of the phase current detected by said phase current phase detection means; and inverter control means for controlling the switch elements of said inverter so as to generate said AC control voltage at the timing arithmetically operated by said control voltage generation timing arithmetical operation means. 2. The generation device according to claim 1, further comprising: a voltage detector that detects the voltage across said voltage accumulation means; and a temperature sensor that detects a temperature of the armature winding of said magneto generator, wherein said phase current phase detection means comprises: rotational speed arithmetical operation means for arithmetically operating a rotational speed of said magneto generator from a cycle of detection of the fixed point on the waveform of the phase current by said fixed point detection means; phase current phase arithmetical operation means for searching a phase current phase arithmetical operation map that provides a relationship between the level of said phase current, the rotational speed of said magneto generator, and the phase angle of the fixed point on the waveform of said phase current in relation to said reference phase, with respect to the level of the phase current detected by said current detector and the rotational speed arithmetically operated by said rotational speed arithmetical operation means to arithmetically operate the phase angle of the fixed point on the waveform of said phase current in relation to said reference phase; and phase current phase correction means for correcting the phase angle arithmetically operated by said phase current phase arithmetical operation means with respect to the voltage across said voltage accumulation means detected by said voltage detector and the temperature of the armature winding detected by said temperature sensor. 3. The generation device according to claim 1, wherein the fixed point on the waveform of said phase current is any of a zero cross point in shift of the phase current waveform from a positive half wave to a negative half wave, a zero cross point in shift of the phase current waveform from the negative half wave to the positive half wave, a peak point of the positive half wave or the negative half wave of the phase current waveform, or a point where the positive half wave or the negative half wave of the phase current reaches a set threshold value. 4. The generation device according to claim 1, wherein said reference phase is a phase of a no-load induced voltage of said armature winding. 5. The generation device according to claim 1, wherein said phase current phase detection means is comprised so as to detect a phase of a fixed point on a waveform of a phase current of one phase only, and said control voltage generation timing arithmetical operation means is comprised so as to calculate generation timing of an n-phase AC control voltage with reference to the phase of the fixed point on the waveform of the phase current of one phase detected by said phase current phase detection means. 6. The generation device according to claim 2, wherein said phase current phase arithmetical operation map is prepared by using a relationship between a phase angle of an AC control voltage to be applied to the armature winding for passing a phase current having the same level as the phase current that passes through said armature winding without the AC control voltage being applied to said armature winding, the rotational speed of said magneto generator, and the level of said phase current, and a relationship between the phase angle of the voltage across each phase winding of the armature winding to which said AC control voltage is applied and the phase angle of the phase current. 7. A generation device comprising: a magneto generator including a rotor having a magnetic field and a stator having an n-phase (n is an integer equal to or larger than one) armature winding; an n-phase voltage type inverter including n-phase bridge-connected switch elements and feedback diodes connected in anti-parallel with the switch elements, and having an AC terminal connected to an output terminal of said armature winding and DC terminals between which voltage accumulation means and a load are connected in parallel; and a controller that controls said inverter so as to apply an n-phase AC control voltage having the same output voltage and frequency as said magneto generator and having a predetermined phase angle in relation to a preset reference phase from said voltage accumulation means to said armature winding through said inverter to perform control to maintain a voltage across said voltage accumulation means at a limit value or less, wherein said generation device further comprises: a current detector that detects a phase current of said magneto generator; a voltage detector that detects the voltage across said voltage accumulation means; and a temperature sensor that detects a temperature of the armature winding of said magneto generator, and said controller comprises: fixed point detection means for detecting a fixed point on a waveform of said phase current that appears every lapse of a time period corresponding to a half cycle of the waveform of said phase current; rotational speed arithmetical operation means for arithmetically operating a rotational speed of said magneto generator from a cycle of detection of the fixed point by said fixed point detection means; first phase current phase arithmetical operation means for using one of two fixed points detected in a time period corresponding to one cycle of the waveform of said phase current as a specific fixed point, and arithmetically operating a phase angle in relation to said reference phase of said specific fixed point, with respect to the rotational speed arithmetically operated by said rotational speed arithmetical operation means and the level of the phase current detected by said current detector; first phase current phase correction means for correcting the phase angle arithmetically operated by said first phase current phase arithmetical operation means with respect to the voltage across said voltage accumulation means detected by said voltage detector and the temperature of the armature winding detected by said temperature sensor; first control voltage generation timing arithmetical operation means for arithmetically operating timing for generating said AC control voltage with reference to the phase of the specific fixed point on the waveform of the phase current corrected by said first phase current phase correction means; second phase current phase detection means for detecting the phase of the specific fixed point on the waveform of said phase current that appears after the generation timing of said AC control voltage with reference to the generation timing of said AC control voltage; second phase current phase correction means for correcting the phase of the fixed point on the waveform of the phase current detected by said second phase current phase detection means with respect to the rotational speed arithmetically operated by said rotational speed arithmetical operation means, the voltage detected by said voltage detector, and the temperature detected by said temperature sensor; second control voltage generation timing arithmetical operation means for arithmetically operating the generation timing of the AC control voltage with reference to the phase of the fixed point on the waveform of the phase current corrected by said second phase current phase correction means; and inverter control means for controlling the switch elements of said inverter so as to generate the AC control voltage at the timing arithmetically operated by said first control voltage generation timing arithmetical operation means when the AC control voltage is first generated after the voltage across said voltage accumulation means exceeds the limit value, and generate said AC control voltage at the timing arithmetically operated by said second control voltage generation timing arithmetical operation means when the AC control voltage is generated for the second time or thereafter after the voltage across said voltage accumulation means exceeds the limit value. 8. The generation device according to claim 7, wherein the fixed point on the waveform of said phase current is any of a zero cross point in shift of the phase current waveform from a positive half wave to a negative half wave, a zero cross point in shift of the phase current waveform from the negative half wave to the positive half wave, a peak point of the positive half wave or the negative half wave of the phase current waveform, or a point where the positive half wave or the negative half wave of the phase current reaches a set threshold value. 9. The generation device according to claim 7, wherein said reference phase is a phase of a no-load induced voltage of said armature winding. 10. The generation device according to claim 7, wherein said phase current phase detection means is comprised so as to detect a phase of a fixed point on a waveform of a phase current of one phase only, and said control voltage generation timing arithmetical operation means is comprised so as to calculate generation timing of an n-phase AC control voltage with reference to the phase of the fixed point on the waveform of the phase current of one phase detected by said phase current phase detection means. 11. A generation device comprising: a magneto generator including a rotor having a magnetic field and a stator having an n-phase (n is an integer equal to or larger than one) armature winding; an n-phase voltage type inverter including n-phase bridge-connected switch elements and feedback diodes connected in anti-parallel with the switch elements, and having an AC terminal connected to an output terminal of said armature winding and DC terminals between which voltage accumulation means and a load are connected in parallel; and a controller that controls said inverter so as to apply an n-phase AC control voltage having the same output voltage and frequency as said magneto generator and having a predetermined phase angle in relation to a preset reference phase from said voltage accumulation means to said armature winding through said inverter to perform control to maintain a voltage across said voltage accumulation means at a limit value or less, wherein said generation device further comprises: a current detector that detects a phase current of said magneto generator; a voltage detector that detects the voltage across said voltage accumulation means; and a temperature sensor that detects a temperature of the armature winding of said magneto generator, and said controller comprises: fixed point detection means for detecting a fixed point on a waveform of said phase current that appears every lapse of a time period corresponding to a half cycle of the waveform of said phase current; rotational speed arithmetical operation means for arithmetically operating a rotational speed of said magneto generator from a cycle of detection of the fixed point by said fixed point detection means; first phase current phase arithmetical operation means for using one of two fixed points detected in a time period corresponding to one cycle of the waveform of said phase current as a specific fixed point, and arithmetically operating a phase angle of said specific fixed point in relation to said reference phase, with respect to the rotational speed arithmetically operated by said rotational speed arithmetical operation means and the level of the phase current detected by said current detector; first phase current phase correction means for correcting the phase angle arithmetically operated by said first phase current phase arithmetical operation means with respect to the voltage across said voltage accumulation means detected by said voltage detector and the temperature of the armature winding detected by said temperature sensor; first control voltage generation timing arithmetical operation means for arithmetically operating timing for generating said AC control voltage with reference to the phase of the specific fixed point on the waveform of the phase current corrected by said first phase current phase correction means; second control voltage generation timing arithmetical operation means for arithmetically operating generation timing of a next generated AC control voltage with reference to the generation timing of said AC control voltage; and inverter control means for controlling the switch elements of said inverter so as to generate the AC control voltage at the timing arithmetically operated by said first control voltage generation timing arithmetical operation means when the AC control voltage is first generated after the voltage across said voltage accumulation means exceeds the limit value, and generate said AC control voltage at the timing arithmetically operated by said second control voltage generation timing arithmetical operation means when the AC control voltage is generated for the second time or thereafter after the voltage across said voltage accumulation means exceeds the limit value. 12. The generation device according to claim 11, wherein the fixed point on the waveform of said phase current is any of a zero cross point in shift of the phase current waveform from a positive half wave to a negative half wave, a zero cross point in shift of the phase current waveform from the negative half wave to the positive half wave, a peak point of the positive half wave or the negative half wave of the phase current waveform, or a point where the positive half wave or the negative half wave of the phase current reaches a set threshold value. 13. The generation device according to claim 11, wherein said reference phase is a phase of a no-load induced voltage of said armature winding. 14. The generation device according to claim 11, wherein said phase current phase detection means is comprised so as to detect a phase of a fixed point on a waveform of a phase current of one phase only, and said control voltage generation timing arithmetical operation means is comprised so as to calculate generation timing of an n-phase AC control voltage with reference to the phase of the fixed point on the waveform of the phase current of one phase detected by said phase current phase detection means. 15. A generation device comprising: a magneto generator including a rotor having a magnetic field and a stator having an n-phase (n is an integer equal to or larger than one) armature winding; an n-phase voltage type inverter including n-phase bridge-connected switch elements and feedback diodes connected in anti-parallel with the switch elements, and having an AC terminal connected to an output terminal of said armature winding and DC terminals between which voltage accumulation means and a load are connected in parallel; and a controller that controls said inverter so as to apply an n-phase AC control voltage having the same output voltage and frequency as said magneto generator and having a predetermined phase angle in relation to a preset reference phase from said voltage accumulation means to said armature winding through said inverter to perform control to maintain a voltage across said voltage accumulation means at a limit value or less, wherein said generation device further comprises: a current detector that detects a phase current of said magneto generator; and a voltage detector that detects a voltage across each phase winding of said magneto generator as a phase voltage, and said controller comprises: fixed point detection means for detecting a fixed point on a waveform of said phase voltage; rotational speed arithmetical operation means for arithmetically operating a rotational speed of said magneto generator from a cycle of detection of the fixed point on the waveform of the phase voltage by said fixed point detection means; phase voltage phase arithmetical operation means for searching a phase voltage phase arithmetical operation map that provides a relationship between the level of said phase current, the rotational speed of said magneto generator, and a phase angle of the fixed point on the waveform of said phase voltage in relation to said reference phase, with respect to the level of the phase current detected by said current detector and the rotational speed arithmetically operated by said rotational speed arithmetical operation means to arithmetically operate the phase angle of said phase voltage in relation to said reference phase; control voltage generation timing arithmetical operation means for arithmetically operating timing for generating said AC control voltage with reference to the phase of the fixed point of the phase voltage arithmetically operated by said phase voltage phase arithmetical operation means; and inverter control means for controlling the switch elements of said inverter so as to generate said AC control voltage at the timing arithmetically operated by said control voltage generation timing arithmetical operation means. 16. The generation device according to claim 15, wherein the fixed point on the waveform of the phase voltage is any of a zero cross point in shift of the phase voltage waveform from a positive half wave to a negative half wave, a zero cross point in shift of the phase voltage waveform from the negative half wave to the positive half wave, a peak point of the positive half wave or the negative half wave of the phase voltage waveform, or a point at which the positive half wave or the negative half wave of the phase voltage reaches a set threshold value. 17. The generation device according to claim 15, wherein said reference phase is a phase of a no-load induced voltage of said armature winding. 18. The generation device according to claim 15, wherein said phase voltage phase detection means is comprised so as to detect a phase of a phase voltage of one phase only, and said control voltage generation timing arithmetical operation means is comprised so as to calculate generation timing of an n-phase AC control voltage with reference to the phase of the phase voltage of one phase detected by said phase voltage phase detection means. 19. The generation device according to claim 15, wherein said phase voltage phase arithmetical operation map is prepared by using a relationship between a phase angle of an AC control voltage to be applied to the armature winding for passing a phase current having the same level as the phase current that passes through said armature winding without the AC control voltage being applied to said armature winding, the rotational speed of said magneto generator, and the level of said phase current.