WO2013054886A1 - Dispositif de génération électrique à entraînement par moteur - Google Patents

Dispositif de génération électrique à entraînement par moteur Download PDF

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Publication number
WO2013054886A1
WO2013054886A1 PCT/JP2012/076451 JP2012076451W WO2013054886A1 WO 2013054886 A1 WO2013054886 A1 WO 2013054886A1 JP 2012076451 W JP2012076451 W JP 2012076451W WO 2013054886 A1 WO2013054886 A1 WO 2013054886A1
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WIPO (PCT)
Prior art keywords
power
engine
load
storage means
power storage
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PCT/JP2012/076451
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English (en)
Japanese (ja)
Inventor
明宏 西川
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株式会社 やまびこ
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Publication of WO2013054886A1 publication Critical patent/WO2013054886A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
    • F02D29/06—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving electric generators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00—Starting of engines by means of electric motors
    • F02N11/08—Circuits or control means specially adapted for starting of engines
    • F02N11/0814—Circuits or control means specially adapted for starting of engines comprising means for controlling automatic idle-start-stop
    • F02N11/0818—Conditions for starting or stopping the engine or for deactivating the idle-start-stop mode
    • F02N11/0825—Conditions for starting or stopping the engine or for deactivating the idle-start-stop mode related to prevention of engine restart failure, e.g. disabling automatic stop at low battery state
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
    • H02P9/04—Control effected upon non-electric prime mover and dependent upon electric output value of the generator
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Definitions

  • the present invention relates to an engine-driven power generation device, and more particularly, to an engine-driven power generation device including a power generation body driven by an engine that automatically stops and starts according to a load usage state and power storage means.
  • Engine-driven power generators are used in places where commercial power is not available, such as in outdoor construction sites.
  • the engine-driven power generation device is used as a power source for welding work or electric equipment on hand (for example, an electric tool such as a grinder).
  • the time for the user to perform such work is about 1 minute if the work is performed by manual welding, and about 10 minutes if the power tool is a grinder.
  • the time for the user to perform such work is about 1 minute if the work is performed by manual welding, and about 10 minutes if the power tool is a grinder.
  • a work using a welding work or an electric device there is a case where, for example, a period of 30 minutes to 1 hour of resting without using a load occurs after one work is finished and the next work is performed. .
  • Patent Document 1 an example of an engine-driven power generator that can automatically start the engine by operating the load without operating the main body of the power generator is described in Patent Document 1 below.
  • a signal generation source (restart detection power source) is connected to a welding output terminal or an AC power output terminal, and a user tries to start work with a load.
  • the engine is started.
  • the engine is started by detecting that the welding rod and the welding base material are in contact with each other.
  • ON / OFF operation of the switch of an electric equipment will be detected and the engine will be started.
  • Patent Document 1 has a problem that the user cannot immediately start the work due to the load immediately after the engine is automatically restarted. Specifically, immediately after the engine is started, the engine has not reached the rotational speed necessary for generating electric power necessary for operating the load. For this reason, immediately after start-up, the output of the power generator is insufficient. If work with a load is started in this shortage state, the load will perform an undesired operation. For example, if it is a welding load, an arc will not generate or it will become difficult to generate. Moreover, if it is an electric equipment, it will not operate
  • the generated torque of the engine is small. For this reason, the engine may stall without being able to resist the rotational resistance to the engine caused by the load current.
  • a battery is used as a power source of a controller for performing the control. For this reason, if the time of the standby state after the automatic stop until the automatic start becomes longer, the charged amount of the battery as the power source of the controller is used up, and the engine may not be started.
  • the present invention provides an engine-driven power generation apparatus having an automatic engine stop and automatic start function, which is necessary for the operation of the load after the engine is automatically restarted when the user starts work with the load. It is a first object of the present invention to provide an engine-driven power generation device that allows a user to immediately start working with a load without waiting until the rotational speed is reached.
  • the present invention can reliably start the engine even when the standby state time in which the engine is automatically stopped becomes longer, and the user can immediately load without waiting for the engine speed to rise.
  • the second object is to provide an engine-driven power generator that makes it possible to maintain a state where work can be started.
  • an engine-driven power generation device of the present invention includes an engine, Connected to a power generator that is driven by the engine to generate AC power, a rectifier that converts AC power generated from the power generator into DC power, a DC power bus section provided on the output side of the rectifier, and a load
  • the output terminal connected to the output side of the DC power bus part, the first power storage means connected in parallel to the DC power bus part, and the DC power bus part from the output of the power generator
  • a charger that controls charging to the first power storage means; a discharger that controls discharge from the first power storage means to supply power to a load; and a current that flows through the output terminal
  • Output current detection means for detecting the engine speed, engine rotation speed detection means for detecting the rotation speed of the engine, and control means for controlling the operation of the engine, the generator, the charger and the discharger.
  • the engine After the output current detecting means detects that no current flows to the output terminal, the engine is stopped and the discharger generates a predetermined no-load voltage at the output terminal.
  • the discharge state from the first power storage means to the DC power bus is controlled, and the control means detects that the output current detection means is supplying current to the output terminal after the engine is stopped.
  • the first power storage means passes through the output terminal to the load. The discharger is controlled so that predetermined power is supplied.
  • the present invention configured as described above is an engine-driven power generation apparatus provided with a first power storage unit for supplying power to a load.
  • the engine-driven power generation apparatus includes an engine according to a use state of the load. It has a function to automatically stop and start automatically. Then, when work with a load is started in a standby state in which the engine is automatically stopped, power is first supplied from the first power storage means to the load, and at the same time, the engine is started. Further, the power supply from the first power storage means to the load is continued until the engine reaches the rotational speed necessary for operating the load. Then, after the engine reaches the rotational speed necessary for the operation of the load, the power supply from the first power storage means to the load is stopped, and the power supply from the engine / power generation body to the load is continued.
  • the first power storage means supplies power to the discharger or the output regulator (inverter or the like) in order to maintain a state where power can be supplied to the load. Need to supply. For this reason, when the time of a standby state becomes long, the situation where the terminal voltage of the 1st electrical storage means and the electrical storage amount may run short may arise.
  • the engine drive power generator further includes terminal voltage detection means for detecting a terminal voltage of the first power storage means, and the control means includes When the terminal voltage of the first power storage means detected by the terminal voltage detection means is equal to or lower than a reference terminal voltage after the engine is stopped, the engine is restarted and the output of the power generator is output by the charger. Power is supplied to the first power storage means.
  • the terminal voltage of the first power storage means is detected (monitored), and when the terminal voltage is equal to or lower than the reference terminal voltage, the engine is started and the power generator
  • the first power storage means is charged with the output of.
  • the reference terminal voltage may be, for example, (1) a state where the minimum voltage required to start the operation of the load cannot be secured, or (2) the operation of the load is started and the engine is started. From the first power storage means to the load until the rotational speed necessary for the operation of the load is reached, the terminal voltage is set such that a sufficient amount of stored power cannot be secured. Good.
  • the engine / power generator is charged each time the terminal voltage and the amount of electricity stored in the first electricity storage means are reduced. For this reason, even if the standby state becomes longer, the load operation is started at the initial stage of power supply to the load in the standby state after the engine is automatically stopped. It is possible to maintain a state in which power can be supplied from the first power storage means to the load until the necessary rotational speed is reached. As a result, even if the standby state becomes longer, it is possible to maintain a state in which the work by the load can be started immediately after the engine is automatically stopped.
  • the second power storage means is provided for maintaining the terminal voltage and the power storage amount of the first power storage means in the standby state in which the engine is automatically stopped. Thereby, it is possible to lengthen the time during which the terminal voltage and the amount of power stored in the first power storage means can maintain a state where “the first power supply from the first power storage means to the load” can be maintained. Moreover, the state which can start the operation
  • the engine when charging the first power storage means in the standby state, the engine can be started to reduce the frequency of charging the first power storage means with the output of the power generator, which can improve fuel efficiency and improve engine performance. It is possible to reduce the consumption of the starter and starter battery.
  • the engine-driven power generation device of the present invention according to claim 1, in the engine-driven power generation device having an automatic engine stop and automatic start function, when the user starts work with a load, the engine is automatically started. From the time until the rotational speed necessary for the operation of the load is reached, the user can immediately start working on the load without waiting.
  • the engine can be automatically started even if the engine is automatically stopped even when the standby time is long. In addition, it is possible to maintain a state in which the user can immediately start working on the load without waiting for the engine speed to rise.
  • (A) is a graph which shows the relationship between the terminal voltage of the 1st electrical storage means and the amount of electrical storage in 2nd Embodiment and 3rd Embodiment of this invention
  • (b) is the 6th in 6th Embodiment of this invention. It is a graph which shows the relationship between the terminal voltage of 1 electrical storage means, and the amount of electrical storage.
  • Embodiments of the present invention will be described below with reference to the drawings. First, a first embodiment of the present invention will be described. 1st Embodiment is an example which applied the engine drive electric power generating apparatus of this invention to the welding machine for performing welding operation.
  • the engine drive power generator of the first embodiment includes an engine 1, a power generator 2 that is driven by the engine 1 to generate AC power, a rectifier 3 that converts AC power generated from the power generator 2 into DC power, and a rectifier 3 is provided with a DC power bus 4 provided on the output side, and an output terminal 6 connected to the output side of the DC power bus 4 for connecting a load.
  • the output terminal 6 is connected to a welding rod W and a base material B which are loads.
  • the DC power bus 4 is provided with a smoothing capacitor 5 for preventing pulsation of DC power in the DC power bus 4.
  • a load supply power adjustment inverter 61 converts the DC power from the DC power bus section 4 into AC power via the smoothing capacitor 5 and adjusts the voltage and current to the load.
  • the transformer 62 performs voltage adjustment on the AC power from the load supply power adjustment inverter 61.
  • the transformer rectifier 63 converts AC power from the transformer 62 into DC.
  • the first power storage means 7 is connected to the DC power bus 4 in parallel.
  • the 1st electrical storage means 7 is comprised from the electric double layer capacitor or the electric double layer capacitor (henceforth a capacitor). These capacitors have an advantage that a large current can flow when compared with batteries having the same weight, and charging and discharging can be performed in a short time.
  • the 1st electrical storage means 7 is not limited to a capacitor, For example, you may use a battery, a capacitor, or an electrical storage means with the property of both.
  • a charger 8 and a discharger 9 are connected between the DC power bus 4 and the first power storage means 7.
  • the charger 8 controls a charging state for charging the first power storage means 7 through the DC power bus 4 with the output of the power generator 2.
  • the discharger 9 controls the discharge state from the first power storage means 7 for supplying power to the load to the DC power bus section 4.
  • the charger 8 and the discharger 9 are constituted by a DC-DC converter using a transformer or a step-up / down chopper.
  • the charger 8 and the discharger 9 are not limited to these, What is necessary is just what can perform voltage adjustment and electric current adjustment.
  • backflow prevention diodes 11 and 11 a may be disposed between the charger 8 and the first power storage unit 7 and between the discharger 9 and the DC power bus 4.
  • backflow prevention diodes 11 and 11 a may be disposed between the charger 8 and the first power storage unit 7 and between the discharger 9 and the DC power bus 4.
  • the control means 17 controls the operation of the engine 1, the power generator 2, the charger 8, the discharger 9, the inverter (electric power adjustment means) 61, and the starter 12 of the engine starting unit. More specifically, the control means 17 controls the fuel supply amount of the engine 1. When the engine 1 is a diesel engine, the control means 17 performs energization control for the glow plug (not shown). Moreover, the control means 17 controls the exciting current, when the electric power generation body 2 has a field winding in a rotor. The control means 17 controls the drive signal of the switching element provided in each of the charger 8 and the discharger 9. Further, the control means 17 sends a start command signal for automatically restarting the engine 1 to the starter 12 of the engine starting unit.
  • the engine starting unit is charged with a key switch 18 that a user operates first to start the engine 1, a starter 12 that starts the engine, a starter battery 13 that serves as a power source for the starter 12, and a starter battery 13.
  • a dynamo 14 driven by the engine 1 is included.
  • the switching means (switch) 13 a provided between the starter 12 and the starter battery 13 switches between conduction and non-conduction in conjunction with the operation of the key switch 18.
  • the switching means 13a is also switched to conduction by a start command signal from the control means 17 in order to restart the engine 1 from the standby state.
  • Power for operating the control means 17 is supplied from the DC power bus 4 to the control means 17 via the step-down circuit 16.
  • electric power is supplied to the control means 17 by the output from the power generator 2.
  • power is supplied from the first power storage means 7 to the control means 17.
  • a welding current setting device 19 is connected to the control means 17.
  • Target values are determined for the engine 1, the power generator 2, the discharger 9 of the first power storage means 7, and the load supply power adjustment inverter 61 according to the set value of the welding current setter 19, and control is performed.
  • the engine rotation speed detection means 15 may measure the rotation speed of the engine 1 as a rotation sensor, or may calculate the rotation speed of the engine 1 from the waveform of the output voltage of the power generator 2.
  • the detection result of the terminal voltage of the first power storage means 7 detected by the terminal voltage detection means 10 is input to the control means 17.
  • the amount of electricity stored in the first electricity storage means 7 is calculated from the terminal voltage using the characteristic data of the first electricity storage means 7.
  • the output current detection means 60 detects the current value of the output line between the transformer rectifier 63 and the output terminal 6. When the load is a welding load, this current value is also used for control information of the load supply power adjustment inverter 61.
  • the control means 17 stops the engine 1 and generates a predetermined no-load voltage at the output terminal 6.
  • the discharge state from the first power storage means 7 to the DC power bus section 4 is controlled by the discharger 9.
  • a welding load welding bar W and welding base material B
  • the welding operation is started as a no-load voltage in a state where no welding operation is performed, that is, an arc is not generated.
  • a no-load voltage (generally about 80V) necessary for the operation may be set.
  • the engine 1 is stopped during the idle state in which the load is not used. Thereby, useless fuel consumption due to the operation of the engine 1 during the period of the rest state is suppressed. Furthermore, no-load voltage is continuously applied to the output terminal 6 after the engine 1 is stopped. For this reason, it can be set as the state which can start a welding operation.
  • control means 17 restarts the engine 1 and is detected by the engine speed detection means 15 when the output current detection means 60 detects that a current is flowing to the output terminal 6 after the engine is stopped.
  • the first power storage means 7 is released so that predetermined power is supplied to the load (welding rod W and base material B) via the output terminal 6.
  • the electric appliance 9 is controlled.
  • the target value of the predetermined rotation speed of the engine 1 is determined according to the set value of the welding current setting device 19.
  • the rotational speed of the engine 1 is detected by the engine rotational speed detection means 15.
  • the power generator 2 is driven by the engine 1.
  • the AC power generated by the power generator 2 is converted to DC by the rectifier 3 for the power generator and supplied to the DC power bus section 4.
  • the DC power whose pulsation is smoothed by the smoothing capacitor 5 provided in the DC power bus section 4 is input to the load supply power adjustment inverter 61.
  • the load supply power adjustment inverter 61 operates in response to the drive signal from the control means 17 to convert the DC power from the DC power bus 4 into AC power, and this AC power is supplied to the transformer 62.
  • the AC power supplied to the transformer 62 is converted into DC power by the transformer rectifier 63 after voltage adjustment. This converted DC power is supplied to a load (welding rod W and welding base material B) connected to the output terminal 6.
  • a terminal of the first power storage means (capacitor) 7 is connected in parallel to the DC power bus 4.
  • a discharger 9 and a charger 8 are provided between the DC power bus 4 and the first power storage unit 7 to control discharge and charge of the first power storage unit 7.
  • the first power storage means 7 When power is supplied from the first power storage means 7 to the load, the first power storage means 7 ⁇ the discharger 9 ⁇ the DC power bus section 4 ⁇ the smoothing capacitor 5 ⁇ the load supply power adjusting inverter 61 ⁇ the transformer 62 ⁇ the transformer rectifier 63 ⁇ the output Electric power is supplied to the load through the path of the terminal 6.
  • the first power storage means 7 is charged by the output of the power generator 2. When charging the first power storage means 7, charging is performed through the path of the power generator 2 ⁇ the power generator rectifier 3 ⁇ the DC power bus 4 ⁇ the charger 8 ⁇ the first power storage means 7.
  • the starter 12 is operated, and the engine 1 is started.
  • the starter 12 is operated after preheating with a glow plug (ignition plug) (not shown) of the engine 1.
  • the starter 12 After the engine 1 is started, the starter 12 is stopped and this time, the dynamo 14 charges the starter battery 13.
  • the starter battery 13 may be charged by the dynamo 14 at all times while the engine 1 is operating.
  • the charger 8 is operated to charge the first power storage means 7.
  • the rotational speed of the engine 1 is set to a low speed (idle rotational speed). It is determined from the current detection value detected by the output current detection means 60 that the device is in the resting state.
  • the engine 1 After the engine 1 is set to the idle rotation speed, the engine 1 is further stopped when a predetermined time elapses.
  • a predetermined time For measuring the “predetermined time” before the engine 1 is idled and stopped, for example, an existing method can be used in which the control means 17 has a timer function and the time is counted.
  • FIG. 2 is a graph showing a state of power supply to the load.
  • the horizontal axis represents time
  • the vertical axis represents power supplied to the load.
  • a line I in the graph indicates a change with time of power supplied to the load.
  • the discharger 9 and the load supply power adjustment inverter 61 use the first power storage means 7 as a power source to stand by in a state where power can be supplied to the load (section A). Specifically, a drive signal is continuously sent from the control means 17 so that the switching elements in the discharger 9 and the load supply power adjusting inverter 61 are continuously operated.
  • the load is a welding load (welding rod W and welding base material B)
  • welding is not performed, that is, in a state where no arc is generated.
  • a no-load voltage generally about 80 V necessary for starting work is continuously applied between the welding rod W and the welding base material B.
  • first power storage means 7 discharger 9 ⁇ DC power bus 4 ⁇ smoothing capacitor 5 Power is supplied through a load supply power adjustment inverter 61 ⁇ transformer 62 ⁇ transformer rectifier 63 ⁇ welding load path. Note that the output current detecting means 60 detects that the load is in an operating state.
  • the voltage is controlled so as to have a value corresponding to the welding current I according to the arc characteristics.
  • an engine start command signal is sent from the control means 17 to the starter 12.
  • the starter 12 is activated and the engine 1 is started.
  • the starter 12 is started after preheating with a glow plug (not shown) as described above.
  • the rotational speed of the engine 1 increases so as to reach a rotational speed corresponding to the output setting for the load, that is, a target rotational speed (section B).
  • the setting of the output with respect to the load is a set value of the welding current setting device 19 selected by the user in the example applied to the welding machine.
  • the rotational speed has not reached the target value, and the output of the power generator 2 has not reached the target value. That is, the current value set by the welding current setting device 19 has not been reached. Therefore, power is continuously supplied from the first power storage means 7 to the load until the rotational speed of the engine 1 reaches the target rotational speed. Until the engine 1 reaches the target rotational speed, predetermined power may be supplied from only the first power storage means 7 to the load, or the load may be supplied from both the first power storage means 7 and the power generator 2 to the load. Electric power may be supplied.
  • the rotational speed of the engine 1 is lowered to the idle rotational speed. Further, when the engine 1 reaches the idle rotation speed and further a predetermined time elapses as shown at time t4 in FIG. 2, the engine 1 automatically stops again.
  • the second embodiment is also an example in which the engine-driven power generation device of the present invention is applied to a welding machine for performing welding work.
  • the configuration of the engine-driven power generation device of the second embodiment is the same as that of the first embodiment shown in FIG.
  • power is also consumed in the discharger 9, the load supply power adjustment inverter 61, and the transformer 62. Specifically, current flows in the circuit of the primary side winding of the transformer 62 and power is consumed.
  • a step-up / step-down chopper is used in the discharger 9 or the like, a current flows through a coil or a capacitor in the circuit and power is consumed.
  • the terminal voltage also decreases. This phenomenon is particularly remarkable when the first power storage unit 7 is a capacitor. For this reason, if the standby state continues for a long time, there is a possibility that the required no-load voltage cannot be secured even with the boosting operation of the discharger 9.
  • the first power storage unit 7 is used as a power source until “the engine 1 reaches the rotational speed necessary for the operation of the load” from “the start of work with the load”.
  • the first power storage unit 7 In order to supply power to the load, it is necessary for the first power storage unit 7 to secure a minimum power storage amount sufficient to continue supplying necessary power during this period (for example, about 10 seconds).
  • “securing the no-load voltage” and “the first power storage means 7 alone is the time from when the operation of the load is started until the target rotational speed is reached after the engine 1 is started.
  • the terminal voltage of the first power storage unit 7 is detected in the “standby state” before starting the load operation with the first power storage unit 7 as a power source while the engine is stopped. “Terminal voltage that can ensure a no-load voltage necessary for load operation” or “From the first power storage means 7 alone, the load operation is started and the engine 1 is started until the target rotational speed is reached. When it is detected that a state in which the amount of electricity necessary to supply power to the load cannot be ensured over time, the engine 1 is started and the first electricity storage means 7 is charged with the output of the power generator 2.
  • the terminal voltage when the above state is reached is set as the reference terminal voltage.
  • the control unit 17 restarts the engine 1 and uses the charger 8 to generate the power generator. 2 outputs power to the first power storage means 7.
  • FIG. 3 is a graph showing the time change of the terminal voltage of the first power storage means 7 in the standby state after the user operates the key switch 18, the horizontal axis of FIG. 3 represents time, and the vertical axis is The terminal voltage of the 1st electrical storage means 7 is represented.
  • a line II in the graph indicates a time change of the terminal voltage of the first power storage unit 7. In the operation shown in FIG. 3, the load is not used.
  • the key switch 18 is turned on at time t0 in FIG. 3, and after the engine 1 is started at time t1, charging of the first power storage means 7 is started at time t2.
  • the first power storage means 7 When the first power storage means 7 reaches full charge Vf at time t3 in FIG. 3 and is in a resting state where the load is not operating, while the engine 1 is operating (that is, automatically at time t4, the speed is automatically increased). Until the engine 1 is stopped at time t5), power is supplied to the control means 17, the load supply power adjustment inverter 61 and the transformer 62 by the output from the power generator 2. (Section A). For this reason, the power storage amount of the first power storage means 7 is not consumed, and the terminal voltage and the power storage amount of the first power storage means 7 do not change.
  • This decrease in the terminal voltage is the “terminal voltage that can secure a no-load voltage necessary for the operation of the load” or “the operation of the load is started only by the first power storage means 7, and the engine
  • the amount of stored electricity required to supply power to the load is less than the amount of power necessary for supplying power to the load during the time from when 1 starts to reach the target rotational speed, various disadvantageous situations may occur. For example, there is a possibility that a situation in which the operation of the load cannot be started (the arc is not generated or is not easily generated in the case of welding work) may occur.
  • an engine start command signal is sent from the control means 17 when it falls below the minimum terminal voltage and the amount of charge necessary for supplying power to the load.
  • the engine 1 is started and the first power storage means 7 is charged with the output from the power generator 2. That is, after the engine is stopped, the control unit 17 restarts the engine 1 when the terminal voltage of the first power storage unit 7 detected by the terminal voltage detection unit 10 is equal to or lower than the reference terminal voltage Vm, and the charger 8
  • the output of the power generator 2 is fed to the first power storage means 7 (time t6).
  • FIG. 4A shows the relationship between the terminal voltage of the first power storage means 7 and the amount of power stored in the present embodiment.
  • the reference terminal voltage Vm is the amount of power necessary for supplying power to the load in the time from the start of the engine 1 to the arrival of the target rotational speed after the operation of the load is started.
  • “Terminal voltage capable of securing a no-load voltage necessary for load operation” is in the state of V1 shown in FIG. 4A, that is, Vz> with respect to the terminal voltage Vz of the first power storage means 7 at the time of “quantity Qz”.
  • Vm V2
  • the reference terminal voltage Vm for sending the engine start command signal is not limited to this, and may be a value with some margin from the minimum voltage.
  • the charging of the first power storage means 7 is stopped.
  • the rotation speed of the engine 1 is automatically adjusted to the idle rotation speed (time t8). Then, the engine 1 stops at a time t9 when a predetermined time further elapses.
  • the engine / power generator is charged. Even if the standby state becomes longer, from the first power storage means 7 that is performed from the start of the engine 1 until the rotational speed necessary for the operation of the load is reached in the initial stage of power supply to the load in the standby state. Since the state in which power can be supplied to the load is maintained, it is possible to maintain a state where the engine 1 can immediately start work from the state in which the engine 1 is automatically stopped even if the standby state becomes longer. it can.
  • the third embodiment is also an example in which the engine-driven power generation device of the present invention is applied to a welding machine for performing a welding operation.
  • a method of extending the charging time of the starter battery 13 by increasing the operation time after starting the engine 1 can be considered.
  • this method is also disadvantageous in terms of improving fuel consumption, and the purpose of automatically stopping / starting the engine 1 for improving fuel efficiency is lost.
  • the terminal voltage is reduced more significantly than the battery due to the decrease in the stored amount, and the stored amount is also smaller than that of the battery. For this reason, the capacitor has a shorter time for the terminal voltage to decrease than when a battery is used. As a result, there is a possibility that the amount of power stored in the capacitor will decrease until the required no-load voltage cannot be secured even with the boosting operation by the discharger 9 in a shorter time than the battery.
  • the engine drive power generator of the third embodiment further includes a second power storage means 21 connected to the first power storage means 7 so as to be able to supply power. Electric power for charging is supplied from the power generator 2 to the second power storage means 21 via the charger 22 for the second power storage means.
  • the second power storage means 21 supplies power for charging to the first power storage means 7 via the booster circuit 23.
  • the voltage adjustment is performed by providing a booster circuit 23 on the output side of the second power storage unit 21.
  • the terminal voltage of the second power storage means 21 may be smaller than the terminal voltage of the first power storage means 7. For this reason, the number of cells connected in series constituting the second power storage means 21 (battery or the like) can be reduced.
  • backflow prevention diodes 24 and 24 a may be disposed between the charger 22 and the second power storage unit 21 and between the booster circuit 23 and the first power storage unit 7, respectively. However, if the charger 22 and the booster circuit 23 are configured to prevent the backflow of current, the backflow prevention diodes 24 and 24a need not be provided.
  • electric power is supplied from the second power storage means 21 to the first power storage means 7 while the engine is stopped.
  • the terminal voltage and the amount of electricity stored in the first power storage means 7 are measured after the engine 1 is started at the initial stage of power supply to the load in the standby state until the rotational speed necessary for operating the load is reached. It is possible to lengthen the time during which the state in which power can be supplied from the first power storage unit 7 to the load can be maintained.
  • the first power storage means 7 for supplying power to the load is a capacitor
  • the second power storage means 21 for charging the capacitor is a battery.
  • the capacity of the battery is excessively large, it is possible to lengthen the time during which the required voltage and the amount of stored electricity can be maintained at the start of the load operation.
  • the weight of the “battery” used as the second power storage means 21 may be small. it can.
  • FIG. 6 is a graph showing the time change of the terminal voltage of the first power storage means 7 in a standby state after the user operates the key switch 18, the horizontal axis of FIG. 6 represents time, and the vertical axis is The terminal voltage of the 1st electrical storage means 7 is represented.
  • a line III in the graph indicates a time change of the terminal voltage of the first power storage unit 7. In the operation shown in FIG. 6, no load is used.
  • the key switch 18 is turned on at time t0 in FIG. 6, and after the engine 1 is started at time t1, charging of the first power storage means 7 is started at time t2.
  • the first power storage unit 7 After the first power storage unit 7 reaches the fully charged Vf at time t3 in FIG. 6, when the load is not operating and the engine 1 is operating (that is, the speed automatically increases at time t4).
  • the electric power is supplied to the control means 17, the load supply power adjusting inverter 61 and the transformer 62 by the output from the power generator 2 until the engine 1 is stopped at the time t5 and adjusted to the idle rotation speed (section 5). A). For this reason, the power storage amount of the first power storage means 7 is not consumed, and the terminal voltage and the power storage amount of the first power storage means 7 do not change.
  • the second power storage means 21 is connected to the first power storage means 7.
  • power is supplied from the second power storage means 21 to the first power storage means 7 every time the terminal voltage and the power storage amount of the first power storage means 7 decrease. For this reason, while the amount of power stored in the second power storage means 21 remains, the terminal voltage of the first power storage means 7 is maintained at the maximum state (section B) as shown by line III in FIG.
  • control means 17 determines that the terminal voltage of the first power storage means 7 detected by the terminal voltage detection means 10 after the engine is stopped is the reference terminal voltage Vm. In the following case, the engine 1 is restarted and the output of the power generator 2 is supplied to the first power storage means 7 by the charger 8 (time t7).
  • the 1st electrical storage means 7 reaches full charge Vf again at the time t8 of FIG. 6, the charge of the 1st electrical storage means 7 stops.
  • the rotational speed of the engine 1 is automatically adjusted to the idle rotational speed (time t9). Then, the engine 1 stops at a time t10 when a predetermined time further elapses.
  • the second power storage means 21 is charged with the output from the power generator 2 when the engine 1 is operating.
  • the 2nd electrical storage means (battery) (direct current) 21 with the alternating current output of the electric power generation body 2
  • the following structures are required.
  • supply of power for charging should be stopped as necessary, or the applied voltage can be limited to a range that does not cause overcharging.
  • a charger 22 for the second power storage means is provided between the second power storage means 21 and the power generation body 2 to charge the second power storage means 21. To supply power for.
  • FIG. 7 shows a configuration of the charger 22 for the second power storage means.
  • the charger 22 includes a transformer 22a, a rectifier 22b, and a switching element 22c.
  • the voltage is adjusted in an AC state by the transformer 22a, converted into a direct current by the rectifier 22b, and execution / stop of power supply is controlled by the switching element 22c.
  • the winding of the power generator 2 in this configuration may be a winding that supplies power to the load, or another winding is provided to charge the second power storage means (battery) 21. May be.
  • FIG. 8 is a main part block circuit diagram showing an engine drive power generator of a first modification.
  • the second power storage means 21 is connected to the first power storage means 7 without going through the booster circuit.
  • the terminal voltage of the second power storage means 21 is adjusted by the number of cells connected in series constituting the second power storage means 21.
  • FIG. 9 is a main part block circuit diagram showing an engine drive power generator of a second modification.
  • a power line is provided on the output side of the power generator rectifier 3, that is, in parallel from the DC power bus 4 and a charger 22 is provided on this power line.
  • the charger 22 is composed of a step-up / down chopper or a DC-DC converter using a transformer.
  • a backflow prevention diode 24 is provided in a direction from the charger 22 toward the second power storage means 21. However, if the charger 22 has a configuration that prevents backflow, the backflow prevention diode 24 need not be provided.
  • FIG. 10 is a main part block circuit diagram showing an engine drive power generator of a third modified example.
  • a power line is provided in parallel from the output line of the charger 8 for the first power storage means, and the charger 8 for the first power storage means is It also serves as a charge control means for the second power storage means.
  • a configuration and operation for switching to supply the first power storage unit 7 and the second power storage unit 21 individually or charge the power for both are necessary.
  • a backflow prevention diode 24 is provided in the direction from the charger 8 toward the second power storage means 21. However, if the charger 8 has a configuration for preventing backflow, the backflow prevention diode 24 need not be provided.
  • any of the configurations shown in FIGS. 8, 9 and 10 it is possible to achieve the operation and effect of the engine drive power generation device of the third embodiment. That is, in any configuration, by supplying electric power to the first power storage means 7, the terminal voltage and the amount of power stored after the engine 1 is started at the initial stage of power supply to the load in the standby state, It is possible to lengthen the time during which it is possible to maintain the state in which power can be supplied from the first power storage means 7 to the load until the rotational speed necessary for operation is reached.
  • Each configuration shown in FIGS. 5, 8, 9 and 10 may be appropriately selected in consideration of specifications required for the engine-driven power generation device such as the size, weight and cost of the product.
  • FIG. 11 shows a block circuit diagram of an engine drive power generator according to the fourth embodiment.
  • the configuration of the engine drive power generator of the fourth embodiment is basically the same as that of the first embodiment shown in FIG. 61 ”,“ transformer 62 ”and“ transformer rectifier 63 ”are omitted.
  • the control of the welding output (welding current) as the engine-driven welding machine is performed by replacing “the rotational speed of the engine 1” or “the field winding of the rotor of the power generator 2” instead of these omitted configurations. This is done by the “line excitation current”
  • FIG. 12 is a block circuit diagram of an engine drive power generator according to the fifth embodiment.
  • the fifth embodiment is an example in which the engine-driven power generator of the present invention is applied to an AC generator that supplies AC power to an electrical device Z that operates with AC power.
  • the configuration of the engine drive power generator of the fifth embodiment is basically the same as that of the first embodiment shown in FIG. 1, but from this configuration, the “transformer 62” and the “transformer rectifier 63” Instead, a noise filter 64 is provided between the load supply power adjustment inverter 61 and the output terminal 6. The high frequency is removed from the load supply power adjustment inverter 61 by the noise filter 64, and a sinusoidal AC voltage is obtained from the output terminal 6.
  • output voltage detection means 65 for detecting the output voltage of the output terminal 6 is provided.
  • whether or not the work by the load (electrical device Z) has been started is determined by the output current detection means 60 as in the examples of the welding machine as in the first, second, third, fourth embodiments. This can be done by detecting that a current is flowing through the output terminal 6, and an input current detecting means may be provided on the input side of the load supply power adjusting inverter 61 to detect the input current.
  • the no-load voltage for enabling power supply from the first power storage means 7 to the load (AC electric appliance Z) is used as the load operating voltage. maintain. For example, if it is a load that meets the specifications of domestic commercial power supply, it may be maintained at 100V or 200V, for example. Moreover, the frequency of AC power is good to be 50 Hz or 60 Hz, for example. And the target value of the engine 1, the electric power generation body 2, the discharger 9 for 1st electrical storage means, and the inverter 61 is determined according to this no-load voltage and frequency. Also, the target output voltage is maintained while the load is operating.
  • FIG. 13 is a block circuit diagram of an engine drive power generator according to the sixth embodiment.
  • the configuration of the engine drive power generator of the sixth embodiment is basically the same as that of the first embodiment shown in FIG. 1, but in the sixth embodiment, the power generator also serves as an electric motor, and further for engine start.
  • An inverter 30 and power adjustment means 30a are provided.
  • the input line of the engine start inverter 30 is connected to the first power storage means 7, and the power adjustment means 30 a is connected between the engine start inverter 30 and the first power storage means 7.
  • the output line of the engine start inverter 30 is connected to the generator / motor 2a.
  • the control of the engine start inverter 30 and the power adjustment means 30a is performed by the control means 17.
  • the control means 17 sends an engine start command signal to the engine start inverter 30 and the power adjustment means 30a to operate them.
  • the power adjustment means 30a adjusts the voltage or current of the direct current output of the first power storage means 7, and the engine start inverter 30 converts the direct current output of the power adjustment means 30a into an alternating current output, which is also used as a power generator. It supplies to the electric motor 2a.
  • the electric generator / motor 2a operates as an electric motor and starts the engine 1.
  • the engine 1 is restarted without using the starter 12. For this reason, consumption of the starter 12 and the starter battery 13 can be prevented.
  • the conduction / non-conduction switching means (switch) 13a between the starter 12 and the starter battery 13 is easily broken due to heat generation when the frequency of switching increases. For this reason, the frequency of use of the starter 12 and the starter battery 13 can be lowered to prevent them from being damaged.
  • a backflow prevention diode 30b may be disposed between the engine start inverter 30 and the power adjustment means 30a. However, if there is a configuration for preventing the backflow of current inside the engine start inverter 30 or the power adjustment means 30a, it is not necessary to provide a backflow prevention diode.
  • the “engine start inverter 30” and the “power adjusting means 30a” of the present embodiment can be added to the configurations of the second and third embodiments described above.
  • the output of the first power storage means 7 is fed only to the load.
  • power is fed to the load and also the power generator / motor 2a is fed.
  • the reference terminal voltage Vm in the present embodiment may be set to a terminal voltage that is in the following state (1-i), (1-ii), or (2). (1-i) A state in which the minimum voltage required to start the operation of the load cannot be secured.
  • FIG.4 (b) the relationship between the terminal voltage of the 1st electrical storage means 7 in this embodiment and the electrical storage amount is shown.
  • the engine-driven power generator of the present invention is suitable for use as a power source for welding machines and electrical equipment.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Eletrric Generators (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)

Abstract

L'invention concerne un dispositif de génération électrique à entraînement par moteur, caractérisé en ce qu'un utilisateur est en mesure d'entamer rapidement une tâche en fonction d'une charge après l'arrêt automatique d'un moteur. Dans la présente invention, après avoir détecté qu'aucun courant électrique ne circule jusqu'à une borne (6) de sortie, un moteur (1) est arrêté et l'état de décharge d'un premier moyen (7) de stockage d'électricité à une unité (4) de bus de puissance à courant continu est régulé par un purgeur (9) de puissance de façon à générer une tension à vide prédéterminée au niveau de la borne (6) de sortie. De plus, après avoir détecté qu'un courant électrique circule jusqu'à la borne (6) de sortie après l'arrêt du moteur, le moteur (1) est redémarré et une puissance prédéterminée est fournie à la charge par l'intermédiaire de la borne (6) de sortie à partir du premier moyen (7) de stockage d'électricité par le purgeur (9) de puissance jusqu'à ce que la vitesse de rotation du moteur (1) atteigne une vitesse de rotation prédéterminée.
PCT/JP2012/076451 2011-10-13 2012-10-12 Dispositif de génération électrique à entraînement par moteur WO2013054886A1 (fr)

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Cited By (1)

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WO2019099804A1 (fr) * 2017-11-17 2019-05-23 Illinois Tool Works Inc. Système d'alimentation de type soudage hybride pourvu d'une batterie de démarreur et d'un dispositif de stockage d'énergie

Families Citing this family (3)

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JP6509648B2 (ja) * 2015-06-24 2019-05-08 日本車輌製造株式会社 発電機
JP6584834B2 (ja) * 2015-06-24 2019-10-02 日本車輌製造株式会社 発電機
US11305369B2 (en) * 2018-08-29 2022-04-19 Lincoln Global, Inc. Engine-based welder with auto-start feature

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JPS61135479A (ja) * 1984-12-05 1986-06-23 Suzuki Motor Co Ltd 溶接機用電源装置
JPH02151370A (ja) * 1988-12-02 1990-06-11 Yanmar Diesel Engine Co Ltd エンジンウエルダ−セット
JPH0519179Y2 (fr) * 1986-11-14 1993-05-20
JP2001212668A (ja) * 2000-02-01 2001-08-07 Shin Daiwa Kogyo Co Ltd エンジン駆動直流アーク溶接機
JP2005229675A (ja) * 2004-02-10 2005-08-25 Honda Motor Co Ltd 電源装置
JP2007045615A (ja) * 2005-08-12 2007-02-22 Kobelco Contstruction Machinery Ltd リフティングマグネットの制御装置及びこれを備えた作業機械
JP2009018343A (ja) * 2007-06-15 2009-01-29 Denyo Co Ltd エンジン駆動型溶接機

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JPS61135479A (ja) * 1984-12-05 1986-06-23 Suzuki Motor Co Ltd 溶接機用電源装置
JPH0519179Y2 (fr) * 1986-11-14 1993-05-20
JPH02151370A (ja) * 1988-12-02 1990-06-11 Yanmar Diesel Engine Co Ltd エンジンウエルダ−セット
JP2001212668A (ja) * 2000-02-01 2001-08-07 Shin Daiwa Kogyo Co Ltd エンジン駆動直流アーク溶接機
JP2005229675A (ja) * 2004-02-10 2005-08-25 Honda Motor Co Ltd 電源装置
JP2007045615A (ja) * 2005-08-12 2007-02-22 Kobelco Contstruction Machinery Ltd リフティングマグネットの制御装置及びこれを備えた作業機械
JP2009018343A (ja) * 2007-06-15 2009-01-29 Denyo Co Ltd エンジン駆動型溶接機

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019099804A1 (fr) * 2017-11-17 2019-05-23 Illinois Tool Works Inc. Système d'alimentation de type soudage hybride pourvu d'une batterie de démarreur et d'un dispositif de stockage d'énergie
US11565339B2 (en) 2017-11-17 2023-01-31 Illinois Tool Works Inc. Methods and apparatus for welding arc start assist

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