JP5690651B2 - Inverter generator - Google Patents

Description

  The present invention relates to an inverter generator, and more particularly to an inverter generator provided with a power generation unit driven by an engine.

  Conventionally, in an inverter generator having a power generation unit driven by an engine, a technique for cranking and starting the engine with a starter motor (cell motor) is widely known. As a result, there is a disadvantage that the entire generator becomes larger by the amount of arrangement.

  Therefore, in the technique described in Patent Document 1 below, the starter motor is removed and the output of the battery is supplied to the power generation unit to rotate and start the engine, that is, the power generation unit functions as a starter motor. The generator is made compact by starting the engine.

JP 2000-340055 A

  By the way, when comprised like the technique of patent document 1, it is necessary to step-up and supply a battery voltage to a voltage which can be rotationally driven by using a power generation part as a starter motor. However, this rotationally driveable voltage is proportional to the set value of the output voltage of the power generation unit, in other words, the set value of the line voltage generated during power generation in the winding wound around the power generation unit. For this reason, for example, when the line voltage of the winding is set to be relatively high, the voltage that can be rotationally driven increases, and thus the converter step-up ratio increases and the converter size increases, resulting in the weight of the entire generator. There was a problem of increasing the size as well as increasing.

  Accordingly, an object of the present invention is to solve the above-described problems, and in an inverter generator having a power generation unit driven by an engine, the engine can be started using the power generation unit, and the overall weight and size can be reduced. It is to provide an inverter generator.

In order to solve the above-described problem, in claim 1, the first winding wound around the power generation unit driven by the engine, and the first winding connected to the first winding. a first converter for converting an AC output to a DC, an inverter for outputting the electrical load by converting direct current into alternating current output from the connected to the first converter in the first converter, said first converter And an inverter generator having a control unit for controlling the operation of the inverter, wherein the second winding is wound around the power generation unit and the resulting line voltage is set to a value of about 50% of the first winding. A second converter that is connected to the second winding and converts the alternating current output from the second winding into a direct current, and an input side is connected to the second converter, while an output side is connected to the first converter. Parallel between positive and negative output terminals Rutotomoni connected directly to the inverter while being continued, the boost converter and outputting the boosted DC voltage output from the second converter, provided with a battery, the control unit the output of the battery The engine is configured to be started by supplying the second winding to rotate the power generation unit.

In the inverter generator according to claim 1, the second winding wound around the power generation unit driven by the engine and the resulting line voltage is set to a value of about 50% of the first winding; And a control unit configured to supply an output of the battery to the second winding to rotate the power generation unit to start the engine, that is, the winding of the power generation unit is configured to be the first winding. And the second winding, and the line voltage of the second winding is set to be small, so that the engine can be started using the power generation unit. Specifically, comparison with the second winding Since the engine can be started by rotating the power generation unit by supplying a low voltage, for example, the boost ratio of the converter that boosts the battery voltage and supplies it to the second winding can be suppressed, thus improving the efficiency of the converter Along with the small converter size Kudeki, can be reduced in weight and size of the entire generator as a result. Furthermore, since the starter motor for starting and the like can be eliminated, the entire generator can be further downsized.

Further, a second converter for converting an AC output from the secondary winding to a DC, while the input side is connected to the second converter, while the output side is connected in parallel between the positive and negative output terminals of the first converter the directly connected to the inverter Rutotomoni, configured with a boost converter boosts a DC voltage output from the second converter output, i.e., the alternating current output from the second winding at a second converter Since it is converted into direct current and the direct current voltage is boosted by the boost converter and output between the positive and negative output terminals of the first converter, the direct current output from the first converter and the boost converter are output. The direct current is superimposed and input to the inverter, where it is converted into alternating current and output. Therefore, even if the line voltage generated in the second winding is set small, the generator Never rated output is reduced. Further, since the line voltage of the second winding is set as described above, the voltage input from the second winding to the second converter is also lowered, thereby lowering the component breakdown voltage (voltage breakdown voltage value) of the second converter. This is advantageous in terms of cost.

Further , since the line voltage generated in the second winding is set to a value of about 50% of that of the first winding, in addition to the above effect, the battery voltage is boosted and supplied to the second winding. Since the converter step-up ratio can be reduced to about 50%, the converter efficiency can be further improved, and the converter size can be reliably reduced, so that the entire generator can be further reduced in weight and size. .

1 is a block diagram generally showing an inverter generator according to an embodiment of the present invention. It is a top view which shows the stator etc. which comprise the electric power generation part shown in FIG. It is a flowchart which shows operation | movement of the control part shown in FIG. It is the same block diagram as FIG. 1 which shows the inverter generator based on a prior art generally.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for implementing an inverter generator according to the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a block diagram generally showing an inverter generator according to an embodiment of the present invention.

  Prior to the description of FIG. 1, the configuration of a conventional inverter generator will be described. FIG. 4 is a block diagram similar to that of FIG. 1 showing the whole inverter generator according to the prior art.

  As shown in FIG. 4, the inverter generator 100 includes a power generation unit (starter generator) 104 driven by the engine 102 and has a rated output voltage of AC 400 V (maximum voltage 750 V). An output winding 106 is wound around the power generation unit 104, and the line voltage Vl (that is, the output voltage of the power generation unit 104) generated in the output winding 106 during power generation is defined by the rated output voltage of the inverter generator 100. Is set to 500V. In the following, the line voltage defined according to the rated output voltage of the generator as described above is referred to as a “specified line voltage value”.

  The engine 102 is started by the rotational drive of the power generation unit 104. Specifically, the control unit 108 including a CPU or the like boosts the DC voltage (12 V) output from the battery 110 to 500 V by the DC / DC converter 112, and starts the boosted output via the smoothing capacitor 114. Input to the converter 116 functioning as a driver. The control unit 108 supplies the battery output input to the converter 116 to the output winding 106 wound around the power generation unit 104, so that a rotor (not shown) that also serves as the flywheel of the engine 102 in the power generation unit 104. Is rotated to start the engine 102.

  When the engine 102 is started and the power generation unit 104 starts power generation, the control unit 108 converts the alternating current (line voltage Vl is 500 V) output from the output winding 106 of the power generation unit 104 into direct current by the converter 116. Then, it is smoothed by the smoothing capacitor 114 and input to the inverter 120, converted into AC 400 V having a predetermined frequency (specifically, 50 Hz or 60 Hz), and supplied to the electric load 124 via the output terminal 122. Since a relatively high voltage is applied to the smoothing capacitor 114, the voltage withstand voltage value is set to a relatively high value (for example, 800V).

  Referring to FIG. 1 based on the configuration of the conventional inverter generator 100 described above, reference numeral 10 in the figure denotes an inverter generator (hereinafter simply referred to as “generator”). The generator 10 includes an engine (internal combustion engine) 12, a power generation unit (starter / generator) 14 driven by the engine 12, and an operation unit 16 disposed at a position that can be operated by an operator (user). It has a rated output voltage of 400V AC with a relatively large rated output.

  The engine 12 is a spark ignition type air-cooled gasoline engine and has, for example, a displacement of 390 cc. The engine 12 is connected to a battery 20 that outputs a DC voltage with a rated voltage of 12 V, and is used as an operating power source for a throttle motor and spark plug (not shown).

  FIG. 2 is a plan view showing a stator and the like constituting the power generation unit 14.

  The power generation unit 14 includes a stator 14 a that is fixed to a crankcase (not shown) of the engine 12, and a rotor 14 b that is rotatably disposed around the stator 14 a and also serves as a flywheel of the engine 12.

  The stator 14a includes a stator core 14a1, and the stator core 14a1 is formed with a plurality of, specifically, 30 protrusions (teeth) 14a2 extending radially. As shown in the figure, among the 30 protrusions 14a2, the half of the 15 protrusions 14a2 are provided with a three-phase first output winding (hereinafter referred to as "first winding") consisting of a set of U, V, and W phases. 22a is wound around the remaining 15 protrusions 14a2, and similarly, a three-phase second output winding composed of a set of U, V, and W phases. A wire 22b (hereinafter referred to as “second winding”, surrounded by a two-dot chain line in the drawing) 22b is wound.

  The first winding 22a is designed such that a line voltage (specified line voltage) Va defined according to the rated output voltage of the generator 10 is generated during power generation. Specifically, for example, the conventional output winding 106 is used. The same 500V (maximum voltage 750V) is set. On the other hand, the line voltage Vb generated in the second winding 22b is set to a value smaller than the first winding 22a, and specifically, set to a value of about 50% (more precisely, 50%) of the first winding 22a. Is done. That is, the line voltage Vb generated in the second winding 22b is set to 250V (maximum voltage 375V), which is about 50% of the conventional output winding 106.

The line voltage Vb generated in the winding as described above is reduced by, for example, reducing the number of turns of the second winding 22b with respect to the first winding 22a. As described above, the windings of the power generation unit 14 are divided (divided) into two systems of first and second windings 22a and 22b having different line voltages.

  Inside the rotor 14b, there are 10 pairs (20 pieces) of permanent magnets 14b1 facing the first and second windings 22a and 22b while alternating the magnetic poles magnetized in the radial direction as shown in the figure. It is attached (only a part is shown in FIG. 2). Two permanent magnets 14b1 (for example, 14b11 and 14b12) form a pair, and one pair of permanent magnets 14b1 is disposed per three protrusions 14a2.

  As the permanent magnet 14b1 of the rotor 14b rotates around the stator 14a, three-phase (U, V, W phase) AC power is output (generated) from the first and second windings 22a, 22b.

  Returning to the description of FIG. 1, the generator 10 further includes a first converter (rectifier) 24 connected to the first winding 22a, a second converter (rectifier) 26 connected to the second winding 22b, First and second smoothing capacitors 30 and 32 connected to the first and second converters 24 and 26, a boost converter 34 connected to a subsequent stage of the second smoothing capacitor 32, the first converter 24 and the boost converter 34, respectively. An inverter 36 connected to the subsequent stage, a DC / DC converter 40 connected to the battery 20, and a control unit 42 that controls operations of the first converter 24, the inverter 36, and the like are provided. In this specification, the “rear stage” means the rear stage (downstream side) in the flow direction of the current output from the power generation unit 14 that is generating power.

  The first converter 24 includes three sets of thyristors 24 a and a diode 24 b that are bridge-connected, and the gate terminal 24 a 1 of the thyristor 24 a is connected to the battery 20 via the control unit 42. The first converter 24 converts the alternating current output from the first winding 22a into direct current by controlling the conduction angle of the thyristor 24a by the control unit 42, and outputs the direct current through the positive and negative output terminals 24c and 24d. .

  The first smoothing capacitor 30 is connected to the subsequent stage of the first converter 24 and smoothes the direct current output from the first converter 24. The voltage withstand voltage value of the first smoothing capacitor 30 is a relatively high value, specifically, for example, set to 800 V, which is the same as that of the conventional smoothing capacitor 114.

  The second converter 26 includes a circuit in which six FETs (field effect transistors, switching elements) 26 b each having a body diode 26 a are bridge-connected, and the gate terminal 26 b 1 of the FET 26 b is connected to the battery 20. In the second converter 26, the operation of the FET 26b is controlled by the control unit 42, specifically, energization (on (conduction)) and energization stop (off (non-conduction)) are controlled, and the body diode 26a is used. The alternating current output from the second winding 22b is converted into direct current and output via the positive and negative output terminals 26c and 26d.

  The second converter 26 also functions as a starter driver (starter generator driver) that operates the starter (starter) of the engine 12 in addition to the operation of the second winding 22b as a generator (generator). . That is, in this embodiment, the second winding 22b is energized to rotate the power generation unit 14 to start the engine 12. In other words, the power generation unit 14 is configured to function as an electric motor (starter motor). The

  Specifically, the second converter (starter driver) 26 controls the operation of the FET 26b by the control unit 42, thereby supplying the output of the battery 20 to the second winding 22b and driving the power generation unit 14 to rotate. The engine 12 is started. When the engine 12 is started, battery output is input from the output terminals 26c and 26d, that is, the output terminals 26c and 26d are input terminals.

  The second smoothing capacitor 32 is connected to the subsequent stage of the second converter 26 and smoothes the direct current output from the second converter 26. Since the output of the second winding 22b in which the line voltage Vb is set to a relatively small value is input to the second smoothing capacitor 32, a voltage withstand voltage value lower than that of the first smoothing capacitor 30 is sufficient. For example, it is set to 400 V corresponding to about 50%. In other words, the voltage withstand voltage value of the second smoothing capacitor 32 is set to about 50% of the conventional smoothing capacitor 114 shown in FIG.

  Boost converter 34 has an input side connected in parallel to positive and negative output terminals 26 c and 26 d of second converter 26, and an output side connected in parallel between positive and negative output terminals 24 c and 24 d of first converter 24. Further, as can be seen from FIG. 1, the connection point between the input side and the output side of the boost converter 34 is the subsequent stage of the first and second smoothing capacitors 30 and 32, respectively.

  The step-up converter 34 is composed of a chopper type DC / DC converter including an FET 34 a, a choke coil 34 b, and a diode 34 c, and a gate 34 a 1 of the FET 34 a is connected to the battery 20. The step-up converter 34 boosts and outputs the DC voltage output from the second converter 26 by controlling the operation of the FET 34 a by the control unit 42.

  The input side of the inverter 36 is connected to the first converter 24 and the boost converter 34. The inverter 36 includes a circuit in which four FETs 36 a are bridge-connected. Similarly, the gate 36 a 1 of the FET 36 a is connected to the battery 20. The inverter 36 controls the conduction / non-conduction of each FET 36a by the control unit 42 so that the direct current output from the first converter 24 and the boost converter 34 is a predetermined frequency (specifically, a commercial frequency of 50 Hz or 60 Hz). Convert to single-phase alternating current.

  The alternating current output from the inverter 36 is output from the output terminal 44 via a filter (not shown) that removes harmonic components of the alternating current, and can be supplied to the electric load 46 via a connector (not shown). .

  The DC / DC converter 40 has an input side connected to the battery 20 and an output side connected to positive and negative output terminals 26c and 26d (herein, input terminals as described above) of the second converter 26.

  The DC / DC converter 40 includes an insulated DC / DC converter including four FETs 40 a, a transformer 40 b, and a diode 40 c that are bridge-connected. A gate 40 a 1 of the FET 40 a is connected to the battery 20. The DC / DC converter 40 controls the operation of the FET 40a by the control unit 42 so as to boost and output the DC voltage output from the battery 20 when the engine is started. The DC voltage generated by the two windings 22b and output from the second converter 26 is stepped down and supplied to the battery 20 for charging.

  The control unit 42 includes a CPU and the like, and controls operations of the first converter 24, the second converter (starter driver) 26, the inverter 36, and the like as described above. The control unit 42 is connected to the battery 20 and supplied with operating power. Although not shown, a transformer or a rectifier circuit is connected to an output stage of any one of the three phases consisting of the U, V, and W phases output from the first winding 22a, and the voltage is stepped down there. The rectified power is supplied to the control unit 42 and the like. That is, a part of the electric power generated by the battery output and the first winding 22a is used as a control power source.

  The operation unit 16 includes a start / stop switch 16a that outputs a start instruction (ON) or a stop instruction (OFF) of the generator 10 from an operator, and a display unit (for example, an output display) that displays an operation state of the generator 10 and the like. Lamps, overload warning lights, liquid crystal panels, etc.) 16b. The output of the start / stop switch 16a is input to the control unit 42, and the operation of the display unit 16b (for example, turning on / off the output indicator lamp) is controlled by the control unit 42.

  Further, a crank angle sensor 50 made of an electromagnetic pickup is disposed in the vicinity of the flywheel of the engine 12, that is, the rotor 14b, and outputs a pulse signal to the control unit 42 at every predetermined crank angle. Although not shown, the generator 10 includes various sensors that detect the voltage and current of the generated power output from the inverter 36, and these sensor outputs are also input to the control unit 42.

  FIG. 3 is a flowchart showing the operation of the control unit 42 of the generator 10. The illustrated program is executed when the start / stop switch 16a is turned on.

  In the following description, first, in S (step) 10, the output of the battery 20 is supplied (energized) to the second winding 22 b to rotate the power generation unit 14 and start the engine 12.

  Specifically, the output DC voltage (12 V) of the battery 20 is boosted to about 250 V in the DC / DC converter 40 and output to the second converter (starter driver) 26. The second converter 26 is operated as a starter driver, supplies the boosted battery output to the second winding 22b, and starts the engine 12 by rotating the rotor 14b of the power generation unit 14 relative to the stator 14a.

  Here, the step-up of the DC / DC converter 40 will be described in detail. For example, the line voltage Vb of the second winding 22b is set to the same 500V (specified line voltage) as that of the conventional output winding 106 described in FIG. In this case, a voltage that can drive and drive the power generation unit 14 (in other words, a voltage that can obtain a sufficient torque when the power generation unit 14 functions as a starter motor) is also about 500V. In such a case, it is necessary to boost the battery voltage (12 V) to 500 V as in the conventional DC / DC converter 112 (corresponding to the converter 40 of the present invention), so that the boost ratio is increased and the converter size is also increased. It gets bigger.

  However, in this embodiment, the line voltage Vb of the second winding 22b is set to about 50% of the conventional output winding 106, in other words, about 50% of the first winding 22a, 250V. Therefore, the voltage at which the power generation unit 14 can be rotationally driven is also about 250 V, and therefore the DC / DC converter 40 only needs to boost the battery voltage to 250 V. Thereby, the step-up ratio of the DC / DC converter 40 can be suppressed, and the converter size is also reduced.

  If the explanation of FIG. 3 is continued, then the process proceeds to S12, where the output number of the crank angle sensor 50 is counted to detect (calculate) the engine speed NE, and the detected engine speed NE has reached the complete explosion speed. Or in other words, it is determined whether or not the engine 12 has been started.

  When the result in S12 is negative, the process of S12 is repeated. When the result is affirmative, the process proceeds to S14, where the power generation unit 14 starts power generation and controls the operation of the first converter 24, the inverter 36, and the like. And supplied to the electric load 46.

Specifically, three-phase AC power (500 V) output (power generation) from the first winding 22 a of the power generation unit 14 is input to the first converter 24, and the AC is converted to DC (700 V) in the first converter 24. Convert to output. The direct current output from the first converter 24 is smoothed by the first capacitor 30 and input to the inverter 36.

  On the other hand, three-phase AC power (250 V) output (power generation) from the second winding 22 b of the power generation unit 14 is input to the second converter 26. The second converter 26 converts the input alternating current into a direct current (350 V) using the body diode 26a and outputs it.

  The direct current output from the second converter 22 is smoothed by the second capacitor 32 and input to the boost converter 34. The boost converter 34 boosts the DC voltage output from the second converter 26 to 700 V, which is doubled, and outputs the boosted voltage to the inverter 36. Accordingly, the inverter 36 receives the DC output from the first converter 24 and the DC output from the boost converter 36 in a superimposed manner.

  In the inverter 36, the input direct current is converted into a single-phase alternating current (AC 400 V) having a predetermined frequency and output, and supplied from the output terminal 44 to the electric load 46 through a filter (not shown).

  Next, in S16, the operator is notified that power generation has started by operating the display unit 16b, for example, turning on the output indicator lamp. Next, in S18, it is determined whether or not the operator has instructed to stop the generator 10, specifically, whether or not the start / stop switch 16a has been turned off.

  When the result in S18 is negative, the process returns to S18. When the result is affirmative, the process proceeds to S20, the engine 12 is stopped by performing ignition cut or the like, and the power generation in the power generation unit 14 is terminated. Next, in S22, the operation of the display unit 16b is stopped, for example, the output indicator lamp is turned off.

As described above, in the embodiment of the present invention, the first winding 22a wound around the power generation unit 14 driven by the engine 12, and the first winding connected to the first winding. a first converter 24 for converting an AC output to a DC, an inverter 36 for output to the electric load 46 converts direct current into alternating current which is connected to the first converter output from the first converter, the second In an inverter generator 10 including one converter and a control unit 42 that controls the operation of the inverter, the line voltage Vb that is wound around the power generation unit and the resulting line voltage Vb is approximately 50% of the first winding (250 V). ), Specifically, the second winding 22b in which the number of turns is set to be smaller than that of the first winding, and the alternating current connected to the second winding and output from the second winding as a direct current. A second converter 26 for converting to While the input side is connected to the second converter, the output side of the first converter positive and negative output terminal 24c, is connected directly to the inverter 36 is connected in parallel while during 24d Rutotomoni, output from the second converter In addition to the boost converter 34 that boosts and outputs the DC voltage to be output and the battery 20, the control unit 42 supplies the output of the battery 20 to the second winding 22b to rotate the power generation unit 14. The engine 12 can be started by driving.

Thus, the second winding 22b wound around the power generation unit 14 driven by the engine 12 and the resulting line voltage Vb is set to a value of about 50% of the first winding 22a , and the battery 20 are connected. The control unit 42 is configured to supply the output of the battery 20 to the second winding 22b to rotate the power generation unit 14 so that the engine 12 can be started, that is, the winding of the power generation unit 14 is set to the first winding. Since the first winding 22a is divided into the second winding 22b and the line voltage Vb of the second winding 22b is set to be small, the engine 12 can be started using the power generation unit 14, specifically Since the engine 12 can be started by rotating the power generation unit 14 by supplying a relatively low voltage to the second winding 22b, for example, a DC voltage is boosted and supplied to the second winding 22b. / DC converter Can be suppressed up ratio of 40, thus it is possible to improve the efficiency of the converter 40, the converter sizes can be reduced, it is possible to reduce the weight and size of the entire generator as a result. Furthermore, since the starter motor for starting and the like can be eliminated, the entire generator can be further downsized.

A second converter 26 that converts alternating current output from the second winding 22b into direct current and an input side connected to the second converter 26, while an output side of the positive and negative output terminals 24c and 24d of the first converter 24 are connected. is connected to an inverter 36 while being connected in parallel between Rutotomoni, configured with a boost converter 34 boosts the DC voltage output from the second converter 26 outputs, i.e., output from the secondary winding 22b The second converter 26 converts the alternating current to direct current, and the direct current voltage is boosted by the boost converter 34 and output between the positive and negative output terminals 24c and 24d of the first converter 24. The DC output from one converter 24 and the DC output from the boost converter 34 are superimposed and input to the inverter 36, where AC Since output is converted, the rated output of the line generator 10 be set smaller voltage Vb generated in the second winding 22b is not lowered. In addition, since the line voltage Vb of the second winding 22b is set as described above, the voltage input from the second winding 22b to the second converter 26 is also lowered, thereby the second converter 26 and the second smoothing capacitor. The component breakdown voltage (voltage breakdown voltage value) of 32 can be lowered, and it is advantageous in terms of cost.

  The line voltage Vb generated in the second winding 22b is set to a value of about 50% of the first winding 22a. Specifically, the number of turns of the second winding 22b is the first. Since it is configured to be about 50% of one winding 22a, the step-up ratio of the DC / DC converter 40 that boosts the battery voltage and supplies it to the second winding 22b can also be about 50%. The efficiency of 40 can be further improved, and the size of the converter can be surely reduced. Therefore, the entire generator can be further reduced in weight and size.

  In the above description, an FET is used as a switching element such as the second converter 26. However, the present invention is not limited to this, and an IGBT (insulated gate bipolar transistor) may be used.

  Further, the line voltage Vb generated in the second winding 22b is configured to be reduced by decreasing the number of turns. However, the present invention is not limited to this, and the number of occupied winding frames in the stator 14a can be changed and reduced. good. That is, in the above description, the number of windings of the first winding 22a and the second winding 22b is set to 15 and the number of turns is reduced. However, the number of turns of each winding is made the same, for example, the first winding 22a By setting the number of winding frames to 21 and 9 of the second winding 22b, the line voltage Vb generated in the second winding 22b may be made smaller than the line voltage Va of the first winding 22a. good.

  In addition, the line voltages Va and Vb of the first and second windings 22a and 22b, the rated output voltage of the inverter generator 10 and the like are shown by specific values, but these are examples and are not limited. Absent.

  10 inverter generator, 12 engine (internal combustion engine), 14 power generation unit, 20 battery, 22a first winding, 22b second winding, 24 first converter, 24c, 24d (first converter) positive and negative output terminals, 26 Second converter, 34 Boost converter, 36 Inverter, 42 Control unit

Claims (1)

A first winding wound around a power generation unit driven by an engine; a first converter connected to the first winding for converting an alternating current output from the first winding into a direct current; and the first In an inverter generator including an inverter connected to a converter and converting a direct current output from the first converter into an alternating current and outputting the alternating current to an electric load, and a control unit for controlling the operation of the first converter and the inverter A second winding that is wound around the power generation unit and the resulting line voltage is set to a value of 50% of the first winding, and is connected to the second winding and output from the second winding. A second converter that converts alternating current to direct current and an input side connected to the second converter, while an output side is connected directly to the inverter while being connected in parallel between the positive and negative output terminals of the first converter. And A boost converter that boosts and outputs a DC voltage output from the second converter and a battery, and the control unit supplies the output of the battery to the second winding to rotate the power generation unit. An inverter generator characterized in that the engine can be started by driving.

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