WO2021020638A1

WO2021020638A1 - Integrated inverter-charger device and control method for controlling same

Info

Publication number: WO2021020638A1
Application number: PCT/KR2019/011115
Authority: WO
Inventors: 최경진; 권오준; 강찬호
Original assignee: 주식회사 이지트로닉스
Priority date: 2019-07-31
Filing date: 2019-08-30
Publication date: 2021-02-04
Also published as: KR102111092B1

Abstract

The present invention relates to an integrated inverter-charger device. According to one aspect of the present invention, an integrated inverter-charger device may be provided which comprises: a charging unit of which one end is connected to a power input unit for supplying alternating current power, and the other end is provided to a transformer which is isolated into a primary side and a secondary side; a conversion unit which, in a charging mode, converts the alternating current power provided from the charging unit into direct current power for charging a battery, and in an operation mode, converts direct current power provided from the battery into power for driving a three-phase electric motor; a transfer switch unit which comprises at least one transfer switch which is switched so that the conversion unit selectively forms a closed circuit with one between the secondary side of the transformer and the three-phase electric motor; and a control unit which controls the switching of the transfer switch so that in the charging mode, the secondary side of the transformer and the conversion unit form a closed circuit, and in the operation mode, the three-phase electric motor and the conversion unit form a closed circuit.

Description

Inverter-charger integrated device and control method for controlling it

The present invention relates to an inverter-charger integrated device used for micro-mobility.

Recently, micro-mobility has emerged due to social issues such as low birthrate, progress in aging, increase in single-person households, centralization of urban areas, and environmental issues such as greenhouse gas reduction and fine dust. Ultra-miniature mobility is a means of transportation that uses the electric power of less than a bicycle or less than a light vehicle, and can be understood as a small personal transportation means of one or two passengers, such as electric kickboards and electric wheels, electric bicycles, and microcars.

Among such micro-mobility, micro electric vehicles generally include a drive motor, a battery, a battery charger, and an inverter. Here, the battery charger includes an EMI filter unit 11, a diode rectification unit 12, a PFC (Power Factor Correction) conversion unit 13, a DC-AC conversion unit 14, a transformer 15, a diode rectification unit 16, It is composed of an LC filter unit 17 (see Fig. 1A), or an EMI filter unit 11' using a synchronous rectification technique, a diode rectification unit 12', a PFC conversion unit 13', a DC-AC conversion unit ( 14'), a transformer (15'), a MOSFET rectifier unit (16'), an LC filter unit (17'), or an EMI filter unit (11 ``) applying the LLC technique, or a diode rectifier unit ( 12''), PFC converter (13''), DC-AC converter (14''), inductor (L), transformer (15``), MOSFET rectifier (19'') (see Fig. 1c) ) Became.

In addition, the micro electric vehicle includes an inverter with a built-in MOSFET for converting power to a driving motor separately from the battery charger. Since the charger serves to store energy into the battery and the inverter serves to consume energy from the battery, these two configurations do not work at the same time. That is, the inverter does not operate when the charger operates, and the charger does not operate when the inverter operates.

On the other hand, the secondary side of the charger and the entire bridge switching part of the inverter are directly connected to the battery, and have a similar structure.If you use them in common, you can reduce the number of parts and space as well as reduce the cost. It has an advantage and can further contribute to improving fuel economy or extending a mileage by reducing the weight. The present invention can be developed and described from the principle for common use of the secondary side of the charger and the entire bridge switching unit of the inverter.

Embodiments of the present invention have been proposed to solve the above problems, and to provide an inverter-charger integrated device capable of efficiently using components by mounting an inverter and a battery charger for driving ultra-small mobility in one device. do.

In addition, it is intended to provide an inverter-charger integrated device capable of performing a battery charging function and a driving function of a three-phase motor as one device.

In addition, it is intended to provide an inexpensive inverter-charger integrated device.

In addition, it is intended to provide an inverter-charger integrated device with improved charging efficiency and inverter efficiency.

According to an embodiment of the present invention, one end is connected to the power input unit for supplying AC power, and the other end is provided as a transformer that is insulated from the primary side and the secondary side; A converter converting AC power provided from the charging unit into DC power for charging a battery in a charging mode, and converting DC power provided from the battery to power for driving a three-phase electric motor in a driving mode; A changeover switch part including at least one changeover switch which is switched to selectively form a closed circuit with one of the secondary side of the transformer and the three-phase motor; In the charging mode, the secondary side of the transformer and the conversion unit are formed in a closed circuit, and in the driving mode, the inverter-charger integrated device includes a control unit for controlling the switching of the switching switch so that the three-phase motor and the conversion unit are formed as a closed circuit. Can be provided.

In addition, the conversion unit includes a first switch module that can be connected to one phase of the three-phase electric motor through a first conductor; A second switch module capable of being connected to another phase of the three-phase electric motor through a second conductor; It includes a third switch module that can be connected to another phase of the three-phase electric motor through a third wire, the first output end of the transformer forms an open end, and the second output end of the transformer is a contact with the second conductor line. And the changeover switch unit is disposed on the first conductor to connect the open end of the first output terminal of the transformer and the first switch module, or selectively connect the three-phase motor and the first switch module. An inverter-charger integrated device comprising a first changeover switch that is switched so as to be switched may be provided.

In addition, the first output end of the transformer forms an open end, the second output end of the transformer forms a contact with the second conductor, and the changeover switch part is disposed on the first conductor to form an open end. A second switching switch for connecting or opening a switch module; An inverter-charger integrated device comprising a third switching switch disposed on a fourth conductor forming a contact with the first conductor and connecting or opening an open end of the first output terminal of the transformer and the first switch module may be provided. .

In addition, the first output terminal and the second output terminal of the transformer form an open end,

A fourth switching switch disposed on the first conductor to connect or open the three-phase electric motor and the first switch module; A fifth changeover switch disposed on the second conductor to connect or open the three-phase electric motor and the second switch module; A sixth changeover switch disposed on a fourth conductor making contact with the first conductor and connecting or opening the open end of the first output terminal of the transformer and the first switch module; An inverter-charger integrated device comprising a seventh changeover switch disposed on a fifth conductor forming a contact with the second conductor and connecting or opening the open end of the second output terminal of the transformer and the second switch module may be provided. .

In addition, the conversion unit may include a plurality of switches, a diode is embedded in the switch, and an inverter-charger integrated device in which the switch of the conversion unit is not switched in a charging mode may be provided.

In addition, an inverter-charger integrated device may be provided that is provided on at least one side of the conversion unit and further includes a first heat dissipation housing capable of absorbing heat generated by the conversion unit.

In addition, the charging unit includes an input filter for filtering an AC signal supplied from an AC power source; A rectifier rectifying the AC power filtered by the input filter; A PFC boost converter compensating for a power factor of the power output from the rectifier; An inverter-charger integrated device including a DC-AC inverter that converts DC power obtained from the PFC boost converter into AC power and outputs it to the transformer side may be provided.

In addition, according to another embodiment of the present invention, a charging unit provided with a transformer; In the control method of the inverter-charger integrated device comprising a conversion unit connected to one side to the battery and the other side to form a closed circuit selectively with one of the charging unit and the three-phase driver, the charging mode or three-phase for charging the battery Selecting one of driving modes for driving the electric motor; When the charging mode is selected, switching the switching switch so that the secondary side of the transformer and the conversion unit form a closed circuit; When the operation mode is selected, a control method of an inverter-charger integrated device comprising the step of switching a switching switch such that the three-phase motor and the conversion unit form a closed circuit may be provided.

The inverter-charger integrated device according to embodiments of the present invention can efficiently use components by mounting an inverter and a battery charger for driving ultra-miniature mobility in one device.

In addition, a battery charging function and a driving function of a three-phase electric motor may be performed as one device.

In addition, an inexpensive inverter-charger integrated device can be provided.

In addition, it is possible to provide an inverter-charger integrated device with improved charging efficiency and inverter efficiency.

1A, 1B, and 1C are views schematically illustrating a charger disposed in a conventional micro-mobility.

2 is a diagram schematically showing an inverter-charger integrated device according to a first embodiment of the present invention.

3 is a diagram schematically showing an inverter-charger integrated device according to a second embodiment of the present invention.

4 is a view schematically showing an inverter-charger integrated device according to a third embodiment of the present invention.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. In addition, in describing the present invention, when it is determined that a detailed description of a related known configuration or function may obscure the subject matter of the present invention, a detailed description thereof will be omitted.

2, an inverter-charger integrated device 1 according to a first embodiment of the present invention includes a charging unit 100; Conversion unit 200; A changeover switch unit 300; It may include a control unit 400.

The inverter-charger integrated device 1 according to the present embodiment is connected between the AC power supply 10 and the battery 20 and the three-phase electric motor 30 to convert the power supplied from the AC power supply 10 to convert the battery ( 20) may be charged (charging mode), or the three-phase electric motor 30 may be operated (operation mode) by converting DC power supplied from the battery 20.

That is, it can be understood that the inverter-charger integrated device 1 operates as a charger in the charging mode and operates as an inverter in the driving mode. Here, the charging mode and the driving mode may be selected by switching of the switching switch unit 300 by the control unit 400 to be described later, and a detailed description thereof will be described later.

The charging unit 100 may include an input filter 112, a rectifying unit 114, a PFC boost converter 116, a DC-AC inverter 118, and a transformer 119.

The input filter 112 may filter an AC signal (eg, an AC voltage) supplied from the AC power supply 10 and output the filtered result to the rectifier 114. Here, the input filter 112 may be an Electro-Magnetic Interference (EMI) filter.

The rectifier 114 may rectify the single-phase AC power filtered by the input filter 112 and output the rectified result to the PFC boost converter 116. Here, the rectifying unit 114 may be implemented by including a diode and a capacitor Cin.

The PFC boost converter 116 may compensate the power factor of DC power output from the rectifier 114 and output the power factor compensated power to the DC-AC inverter 118. The PFC boost converter 116 may perform a role of compensating the power factor of the power supply and at the same time perform boosting to increase a voltage as necessary. Here, the power factor compensation is required to stabilize the power of the system.

The DC-AC inverter 118 may convert the DC power obtained from the PFC boost converter 116 into AC power and output it to the transformer 119. The DC-AC inverter 118 may be implemented as a full bridge or half bridge circuit. In addition, the DC-AC inverter 118 may be synchronously switched with the conversion unit 200 to be described later.

The transformer 119 is configured to transform the AC voltage obtained from the DC-AC inverter 118 into a voltage level required for battery charging, and provides insulation between the primary side 110 and the secondary side 120 of the transformer 119. Can be secured. Here, the primary side 110 may be understood as an input side of the transformer 119 and the secondary side 120 may be understood as an output side of the transformer 119.

In addition, by selectively connecting the secondary side 120 of the transformer 119 to the conversion unit 200 to be described later, the conversion unit 200 can be insulated from the primary side of the transformer 119. In addition, the first output terminal 121 and the second output terminal 122 of the secondary side 120 form a contact with one of the first, second, and third conductors 31, 32, and 33 to be described later, and the conversion unit 200 ) Can be connected. For example, the first output terminal 121 may form an open end and a closed circuit may be formed by switching of the first switching switch 310 to be described later, and the second output terminal 122 is a second conductor ( 32) can be connected to the conversion unit 200 by forming a contact point.

In addition, the transformer 119 may be configured to include an inductor L, and the inductor L may function as a leakage reactor.

The conversion unit 200 may be selectively connected to the charging unit 100 and the three-phase electric motor 30 by a switching switching unit 300 to be described later. The conversion unit 200 converts AC power provided from the charging unit 100 in the charging mode to DC power for charging the battery 20, and converts the DC power provided from the battery 20 in the operation mode to a three-phase electric motor ( 30) can be converted to power to drive. For example, the conversion unit 200 may be an inverter.

Here, the charging mode may be understood as an operation in which the battery 20 is charged from the power of the AC power supply 10, and the operation mode may be understood as an operation in which the three-phase motor 30 is driven from the power of the battery 20. I can.

One side of the conversion unit 200 may be connected to the battery 20, and the other side of the conversion unit 200 may be connected to one of the charging unit 100 and the three-phase motor 30 to selectively form a closed circuit.

The conversion unit 200 includes a first switch (S1), a second switch (S2), a third switch (S3), a fourth switch (S4), a fifth switch (S5), and a sixth switch (S6). And may include a capacitor (C) connected to them in parallel.

Here, one end of the first switch S1 and one end of the fourth switch S4 are connected in series with each other, and the first switch S1 and the fourth switch S4 may be understood as forming a first switch module. have.

In addition, one end of the second switch S2 and one end of the fifth switch S5 are connected in series with each other, and the second switch S2 and the fifth switch S5 may be understood as forming a second switch module. have. In this case, switches belonging to the second switch module are connected in parallel with switches belonging to the first switch module.

In addition, one end of the third switch S3 and one end of the sixth switch S6 are connected in series, and it will be understood that the third switch S3 and the sixth switch S6 form a third switch module. I can. At this time, switches belonging to the third switch module are connected in parallel with switches belonging to the first and second switch modules.

In addition, the first switch (S1) may include a first inverter diode (D1), the second switch (S2) may include a second inverter diode (D2), and the third switch (S3) 3 may include an inverter diode (D3), the fourth switch (S4) may include a fourth inverter diode (D4), and the fifth switch (S5) may include a fifth inverter diode (D5). In addition, the sixth switch S6 may include a sixth inverter diode D6. Here, each inverter diode (D1, D2, D3, D4, D5, D6) is built into each switch (S1. S2, S3, S4, S5, S6).

In this way, by arranging the inverter diodes built into each switch, the battery 20 can be charged through the inverter diode without switching operation of each switch in the charging mode. In addition, since the battery 20 can be charged through a diode built into each switch, a structure that does not require a separate inductor at the output terminal can be provided.

Specifically, in the case of using the conventional ZVS Full Bride technique (refer to Figs. 1(a) and 1(b)), the LC filter units 17 and 17' on the secondary side of the transformers 15 and 15' ) Is located, and the LC filter units 17 and 17' include inductors. Since the inductor is designed with a small capacity in the charger, a large current cannot flow during the operation of the inverter, so that the charger and the inverter cannot be integrated.

In the case of using the LLC technique, a single-phase full bridge MOSFET and C filter including four switching elements are connected to the battery without an inductor (L) on the output side. Meanwhile, a general inverter connects a three-phase full bridge MOSFET and C filter including six switching elements to the battery.

In this embodiment, the LLC technique is applied (excluding the inductor), but the leakage reactor 117 is positioned on the primary side (or secondary side) of the transformer 119, and six switches S1, S2, S3, and By configuring the four switches (S1, S2, S4, S5) of S4, S5, S6) to be used for charging, the inverter and the charger can be integrated.

In addition, in the embodiment of the present invention, an IGBT may be applied instead of a MOSFET in the conversion unit 200. Here, since the capacity of the diode (body diode) built into the MOSFET or IGBT is large, it can be used instead of the diode rectifier of the charger.

The three-phase electric motor 30 may provide power to drive micro-mobility. One of the three conductors connected to each phase (U, W, V) of the three-phase electric motor 30 is connected to the first switch module, the other conductor is connected to the second switch module, and The other conducting wire may be connected to the third switch module.

Specifically, the first conductor 31 connected to the three-phase electric motor 30 may be connected between the first switch S1 and the fourth switch S4, and a second conductor connected to the three-phase electric motor 30 32 may be connected between the second switch S2 and the fifth switch S5, and the third conductor 33 connected to the three-phase electric motor 30 is the third switch S3 and the sixth switch ( S6) can be connected between. Here, each switch may be a switch such as a relay switch, a changeover switch, a non-contact switch, or a semiconductor switch. In this case, a changeover switch to be described later may be disposed on at least one of the first conductor 31, the second conductor 32, and the third conductor 33.

In this way, the three-phase electric motor 30 and the conversion unit 200 are connected through the three lead wires 31, 32, and 33, and the changeover switch is arranged on at least one of the three lead wires 31, 32, 33. Due to the structure, the stator winding of the motor can be formed in a structure not used as an inductor. Accordingly, the inverter-charger integrated device 1 of the present embodiment can be applied irrespective of the type of the driver (most of the conventional integrated structures apply a motor with the neutral point of the motor exposed, so that the midpoint and the stator winding are connected to the inductor. Structure used as).

The changeover switch unit 300 may include at least one changeover switch that is switched so that the conversion unit 200 selectively forms a closed circuit with one of the secondary side 120 and the three-phase motor 30 of the transformer 119. have.

In the following embodiment, one changeover switch (first changeover switch 310) is disposed at one end of the first conductor 31, and the other end of the first conductor 31 and the first output end 121 of the transformer 119 ), it will be described as an example. At this time, the second output terminal 122 of the transformer 119 forms a contact with the second conductor 32.

In the operation mode, the first changeover switch 310 is switched to connect the three-phase motor 30 and the first switch modules S1 and S4, so that the three-phase motor 30 and the conversion unit 200 form a closed circuit. I can. When the three-phase electric motor 30 and the conversion unit 200 form a closed circuit, the three-phase electric motor 30 may be operated by receiving power from the battery 20. At this time, the first switching switch 310 is switched so that the secondary side 120 and the first conductor 31 of the transformer 119 are opened, and the charging unit 100 side is open to apply an abnormal voltage to the transformer 119 There is no effect.

In the charging mode, the first switching switch 310 is switched to connect the first output terminal 121 of the transformer 119 and the first switch module, and the secondary side 120 and the conversion unit 200 of the transformer 119 Can form a closed loop. When the secondary side 120 of the transformer 119 and the conversion unit 200 form a closed circuit, the battery 20 may be charged by receiving power from the AC power supply 10. At this time, since the first switching switch 310 is switched so that the first conductors 31 are opened, there is an effect that no current flows through the stator windings of the three-phase electric motor 30.

In the above-described embodiment, the first switching switch 310 is disposed at one end of the first conductor line 31 to be switched between the other end of the first conductor line 31 and the first output terminal 121 of the transformer 119. Although described as an example, the first switching switch 310 is not limited thereto, and the first switching switch 310 is disposed at one end of the second conductor 32, and the other end of the second conductor 32 and the second output terminal 122 of the transformer 119 It may also include switching between.

The control unit 400 is configured such that the secondary side 120 and the conversion unit 200 of the transformer 119 are formed in a closed circuit in the charging mode, and the three-phase motor 30 and the conversion unit 200 are formed in a closed circuit in the operation mode. Switching of the first switching switch 310 may be controlled.

In addition, when the battery 20 falls below a preset condition, the controller 400 may determine and display that the charging mode has been entered.

In addition, the control unit 400 may control each configuration of the inverter-charger integrated device 1 of the embodiment of the present invention.

In addition, according to an embodiment of the present invention, the inverter-charger integrated device 1 may include a first heat dissipation housing 510 capable of absorbing heat generated by the conversion unit 200.

The first heat dissipation housing 510 may be provided on at least one side of the conversion unit 200. For example, the first heat dissipation housing 510 may be provided to surround the outer circumference of the conversion unit 200, and may be provided to surround at least a portion of the conversion unit 200.

In this way, the inverter-charger integrated device 1 incorporates a diode in the conversion unit 200 and arranges the first heat dissipation housing 510 on one side of the conversion unit 200 to reduce heat generated from the diode of the charging unit. It can be shared by the first heat dissipation housing 510.

In addition, the inverter-charger integrated device 1 may further include a second heat dissipation housing 520 provided on at least one side of the charging unit 100 so as to absorb heat generated by the charging unit 100.

Hereinafter, a control method of the inverter-charger integrated device 1 according to an embodiment of the present invention will be described.

One of the charging mode and the driving mode may be selected by an operation switch (not shown) provided in the inverter-charger integrated device 1 (S101). Here, the operation switch may be a relay or magnet contactor that is opened and closed by a command of the control unit 400, and a manual switch may be applied.

When the battery 20 is less than or equal to a preset condition, the controller 400 determines that the charging mode is required and may be displayed to the user.

When the charging mode is selected, the first switching switch 310 is switched to the first output terminal 121 of the transformer 119 by the control unit 400. In this case, the power of the AC power supply 10 is charged in the battery 20 through the charging unit 100 and the conversion unit 200. At this time, each switch (S1, S2, S3, S4, S5, S6) of the conversion unit 200 is not switched, and the diode (D1) built in each switch (S1, S2, S3, S4, S5, S6) , D2, D3, D4, D5, D6) can be charged by the battery 20.

When the driving mode is selected, the second switching switch 320 is switched to connect the first conductors 31 by the control unit 400. In this case, the power of the battery 20 is transmitted to the three-phase electric motor 30 through the conversion unit 200, and the three-phase electric motor 30 may be driven.

Hereinafter, an inverter-charger integrated device 1'according to a second embodiment of the present invention will be described with reference to FIG. 3. However, since the second embodiment is different in the changeover switch unit 300 compared to the first embodiment described above, the differences will be mainly described, and the description and reference numerals of the above-described embodiment are used for the same parts.

Referring to FIG. 3, a second changeover switch 320 ′ is disposed on the first conductor 31 to connect or cut off the three-phase electric motor 30 and the first switch modules S1 and S4. ); The third switch is arranged on the fourth conductor 34 that makes contact with the first conductor 31 and connects or blocks the open end of the first output terminal 121 of the transformer 119 and the first switch modules S1 and S4. A switch 330 may be included.

At this time, the control unit 400 switches the second switching switch 320 to connect the three-phase electric motor 30 and the first switch modules S1 and S4 in the operation mode, and the transformer 119 and the first switch module The third changeover switch 330 is switched to open (S1, S4).

In addition, the control unit 400 switches the second switching switch 320 so that the three-phase electric motor 30 and the first switch modules S1 and S4 are opened in the charging mode, and the transformer 119 and the first switch module ( The third changeover switch 330 is switched so that S1 and S4 are connected.

Hereinafter, an inverter-charger integrated device 1 ″ according to a third embodiment of the present invention will be described with reference to FIG. 4. However, since the third embodiment is different in the changeover switch unit 300 compared to the first embodiment described above, the differences will be mainly described, and the description and reference numerals of the above-described embodiment are used for the same parts.

Referring to FIG. 4, the changeover switch unit 300'' is disposed on the first conductor 31 to connect or open the three-phase motor 30 and the first switch modules S1 and S4. 340); A fifth changeover switch 350 disposed on the second conductor 32 to connect or open the three-phase electric motor 30 and the second switch modules S2 and S5; 6th switching to connect or open the open end of the first output terminal 121 of the transformer 119 and the first switch modules S1 and S4 by being arranged on the fourth conductor 34 making contact with the first conductor 31 Switch 360; The seventh changeover switch 370 is disposed on the fifth conductor 35 that makes contact with the second conductor 32 and connects or opens the open end of the second output terminal 122 of the transformer 119 and the second switch module. Can include.

At this time, the control unit 400 is a fourth so that the three-phase electric motor 30 and the first switch module (S1, S4), three-phase electric motor 30 and the second switch module (S2, S5) are respectively connected in the operation mode. The changeover switch 340 and the fifth changeover switch 350 are switched. In addition, the control unit 400 includes the sixth changeover switch 360 so that the transformer 119, the first switch modules S1 and S4, the transformer 119 and the second switch modules S2 and S5 are opened in the driving mode. The seventh changeover switch 370 is switched.

In addition, the control unit 400 switches the fourth so that the three-phase electric motor 30, the first switch module (S1, S4), the three-phase electric motor 30, and the second switch module (S2, S5) are opened respectively in the charging mode. The switch 340 and the fifth changeover switch 350 are switched. In addition, the control unit 400 includes the sixth changeover switch 360 so that the transformer 119 and the first switch modules S1 and S4, and the transformer 119 and the second switch modules S2 and S5 are connected in the driving mode. The seventh changeover switch 370 is switched.

The inverter-charger integrated device according to the embodiment of the present invention has been described as a specific embodiment, but this is only an example, and the present invention is not limited thereto, and has the widest scope according to the basic idea disclosed in the present specification. It must be interpreted. A person skilled in the art may combine and replace the disclosed embodiments to implement a pattern of a shape not indicated, but this also does not depart from the scope of the present invention. In addition, those skilled in the art can easily change or modify the disclosed embodiments based on the present specification, and it is clear that such changes or modifications also belong to the scope of the present invention.

The present invention can be used in the ultra-small mobility industry.

Claims

A charging unit provided as a transformer having one end connected to a power input unit supplying AC power, and the other end being insulated into a primary side and a secondary side;

A converter converting AC power provided from the charging unit into DC power for charging a battery in a charging mode, and converting DC power provided from the battery to power for driving a three-phase electric motor in a driving mode;

A changeover switch part including at least one changeover switch which is switched to selectively form a closed circuit with one of the secondary side of the transformer and the three-phase motor;

Inverter-charger integrated device comprising a control unit for controlling switching of the changeover switch so that the secondary side of the transformer and the conversion unit are formed in a closed circuit in a charging mode, and in a driving mode, the three-phase motor and the conversion unit are formed in a closed circuit.
The method of claim 1,

The conversion unit,

A first switch module capable of being connected to one phase of a three-phase electric motor through a first conductor;

A second switch module capable of being connected to another phase of the three-phase electric motor through a second conductor;

Including a third switch module that can be connected to another phase of the three-phase electric motor through a third conductor,

The first output end of the transformer forms an open end,

The second output terminal of the transformer forms a contact with the second conductor,

The changeover switch unit,

A first switching switch disposed on the first conductor to connect the open end of the first output end of the transformer and the first switch module, or selectively connect the three-phase motor and the first switch module. Inverter-charger integration device comprising.
The method of claim 1,

The conversion unit,

A first switch module capable of being connected to one phase of a three-phase electric motor through a first conductor;

A second switch module capable of being connected to another phase of the three-phase electric motor through a second conductor;

Including a third switch module that can be connected to another phase of the three-phase electric motor through a third conductor,

The first output end of the transformer forms an open end,

The second output terminal of the transformer forms a contact with the second conductor,

The changeover switch unit,

A second switching switch disposed on the first conductor to connect or open the three-phase electric motor and the first switch module;

An inverter-charger integrated device comprising a third changeover switch disposed on a fourth conductor making contact with the first conductor and connecting or opening the open end of the first output terminal of the transformer and the first switch module.
The method of claim 1,

The conversion unit,

A first switch module capable of being connected to one phase of a three-phase electric motor through a first conductor;

A second switch module capable of being connected to another phase of the three-phase electric motor through a second conductor;

Including a third switch module that can be connected to another phase of the three-phase electric motor through a third conductor,

The first output terminal and the second output terminal of the transformer form an open end,

The changeover switch unit,

A fourth switching switch disposed on the first conductor to connect or open the three-phase electric motor and the first switch module;

A fifth changeover switch disposed on the second conductor to connect or open the three-phase electric motor and the second switch module;

A sixth changeover switch disposed on a fourth conductor making contact with the first conductor and connecting or opening the open end of the first output terminal of the transformer and the first switch module;

Inverter-charger integrated device comprising a seventh changeover switch disposed on a fifth conductor forming a contact with the second conductor and connecting or opening the open end of the second output terminal of the transformer and the second switch module.
The method of claim 1,

The conversion unit includes a plurality of switches,

A diode is built into the switch,

In the charging mode, the switch of the conversion unit is not switched inverter-charger integrated device.
The method of claim 1,

An inverter-charger integrated device further comprising a first heat dissipation housing provided on at least one side of the conversion unit and capable of absorbing heat generated by the conversion unit.
The method of claim 1,

The charging unit,

An input filter for filtering an AC signal supplied from an AC power source;

A rectifier rectifying the AC power filtered by the input filter;

A PFC boost converter compensating for a heat factor of power output from the rectifier;

Inverter-charger integrated device comprising a DC-AC inverter for converting the direct current power obtained from the PFC boost converter into AC power and outputting it to the transformer side.
A charging unit provided with a transformer; In the control method of the inverter-charger integrated device comprising a conversion unit connected to one side to the battery and the other side to form a closed circuit selectively with one of the charging unit and the three-phase driver,

Selecting one of a charging mode for charging the battery or a driving mode for driving a three-phase electric motor;

When the charging mode is selected, switching the switching switch so that the secondary side of the transformer and the conversion unit form a closed circuit;

When the operation mode is selected, the control method of the inverter-charger integrated device comprising the step of switching the switching switch so that the three-phase motor and the conversion unit form a closed circuit.