Multifunctional power conversion device

Abstract

The utility model provides a multifunctional power supply conversion device, which is provided with a box body, the box body comprises a control panel, a three-phase power supply input socket and a direct current transformer, the control panel is fixed on the upper surface of the box body, the three-phase power supply input socket is arranged on the outer side surface of the box body, and the direct current transformer is arranged in the box body. A two-phase power supply output interface, a three-phase power supply output interface, a direct-current power supply output interface and a two-phase power supply input socket are fixed above the control panel; wherein the two-phase power supply output interface is electrically connected with the three-phase power supply input socket and the two-phase power supply input socket respectively, the three-phase power supply output interface is electrically connected with the three-phase power supply input socket and the two-phase power supply input socket respectively, and the direct-current transformer is electrically connected with the three-phase power supply input socket and the two-phase power supply input socket respectively. Therefore, conversion between different power supply voltages is realized, power can be supplied to the fault load independently, and the limitation of the field on the power supply demand of the motor train unit is reduced.

Description

Technical Field

[0001] The utility model relates to the field of motor vehicle fault troubleshooting instruments, in particular to a multifunctional power supply conversion device. Background Art

[0002] Since the intercity EMUs entered service, numerous faults have been discovered during maintenance on various air conditioning condenser fans, including abnormal noise from ventilation fans and traction cooling fans. However, due to on-site operational limitations, it's impossible to independently power each air conditioning condenser fan to identify the fault point while the train is powered on, severely hindering fault location identification during operations.

[0003] Secondly, due to design defects in the power equipment of some systems of the EMU, harsh operating environment, improper maintenance and long service life, the power equipment often malfunctions, such as the wiper device in the driver's cab, sunshade, water tank pump, opening and closing cover mechanism, seat socket, etc. During the vehicle power-on process, since the operating voltage of each power supply device may be different, it is impossible to uniformly and independently power each power supply device to confirm the fault point, and it is also impossible to observe the operating status of each power supply device at close range. Utility Model Content

[0004] The purpose of the present utility model is to solve at least one of the technical problems existing in the prior art, and to provide a multifunctional power supply conversion device, which realizes the conversion between different power supply voltages, can supply power to the faulty load separately, and reduces the limitation of the power supply demand for the EMU on site. At the same time, it can also observe the operating status of each faulty load at close range and improve the accuracy and safety of EMU equipment fault detection.

[0005] To achieve the above objectives, in a first aspect, an embodiment of the present invention provides a multifunctional power conversion device, comprising:

[0006] The box includes a control panel, a three-phase power input socket, and a DC transformer. The control panel is fixed to the upper surface of the box, the three-phase power input socket is located on the outer side of the box, and the DC transformer is located inside the box. A two-phase power output interface, a three-phase power output interface, a DC power output interface, and a two-phase power input socket are fixed above the control panel.

[0007] Among them, the two-phase power output interface is electrically connected to the three-phase power input socket and the two-phase power input socket respectively, the three-phase power output interface is electrically connected to the three-phase power input socket and the two-phase power input socket respectively, the DC transformer is electrically connected to the three-phase power input socket and the two-phase power input socket respectively, the DC power output interface is electrically connected to the DC transformer, the two-phase power output interface is used to convert the input voltage into a first rated voltage, the three-phase power output interface is used to convert the input voltage into a second rated voltage, and the DC transformer is used to convert the input voltage into a third rated voltage.

[0008] Furthermore, in some embodiments, a three-phase circuit breaker and a single-phase circuit breaker are fixed above the control panel. The three-phase circuit breaker is electrically connected between the three-phase power input socket and the three-phase power output interface, and the single-phase circuit breaker is electrically connected between the two-phase power input socket and the two-phase power output interface. The three-phase circuit breaker is used as a current input control switch for the three-phase power input socket, and the single-phase circuit breaker is used as a current input control switch for the two-phase power input socket.

[0009] Furthermore, in some embodiments, the three-phase circuit breaker is a 3P+N leakage protection air switch, and the maximum fuse current of the three-phase circuit breaker is 20A; the single-phase circuit breaker is a 1P+N double-input and double-output leakage protection air switch, and the maximum fuse current of the single-phase circuit breaker is 10A.

[0010] Furthermore, in some embodiments, a first voltage and ammeter is fixed above the control panel. The first voltage and ammeter is electrically connected between the three-phase circuit breaker and the single-phase circuit breaker. The first voltage and ammeter is used to detect whether the power current input by the three-phase power input socket or the two-phase power input socket is normal. The first voltage and ammeter is a digital AC and DC voltage and ammeter.

[0011] Furthermore, in some embodiments, a second voltage and ammeter is fixed above the control panel. The second voltage and ammeter is electrically connected between the DC power output interface and the DC transformer. The second voltage and ammeter is used to detect the current output by the DC power output interface. The second voltage and ammeter is a digital AC and DC voltage and ammeter.

[0012] Furthermore, in some embodiments, a first adjustment knob and a second adjustment knob are fixed above the control panel. The first adjustment knob is electrically connected to the DC transformer, and the second adjustment knob is electrically connected to the DC transformer. The first adjustment knob is used to adjust the voltage output by the DC transformer, and the second adjustment knob is used to adjust the current output by the DC transformer. The voltage adjustment range of the first adjustment knob is 0-110V, and the voltage adjustment range of the second adjustment knob is 0-4A.

[0013] Furthermore, in some embodiments, a DC output switch is provided above the control panel, and the DC output switch is electrically connected between the DC power output interface and the DC transformer.

[0014] Furthermore, in some embodiments, a first air outlet is provided above the control panel, and the first air outlet is used to transmit the hot air from the box to the outside. A second air outlet is also provided on the outer side of the box, and the second air outlet is used to transmit the cold air from the outside to the inside of the box.

[0015] Furthermore, in some embodiments, the three-phase power output interface includes three copper terminals, the two-phase power output interface includes two copper terminals, and the DC power output interface includes two copper terminals. The plug specifications of the copper terminals are all M4×36, and the jack diameters of the copper terminals are all 4 mm.

[0016] Furthermore, in some embodiments, the maximum output current of the two-phase power output interface is 20A, and the maximum output current of the three-phase power output interface is 20A.

[0017] A multifunctional power conversion device according to an embodiment of the present invention has at least the following beneficial effects: a box body is provided, the box body includes a control panel, a three-phase power input socket and a DC transformer, the control panel is fixed to the upper surface of the box body, the three-phase power input socket is arranged on the outer side of the box body, the DC transformer is arranged inside the box body, and a two-phase power output interface, a three-phase power output interface, a DC power output interface and a two-phase power input socket are fixed above the control panel, thereby realizing a centralized connection between different fault loads and the multifunctional power conversion device based on the integrated control panel, and being able to observe the operating status of each fault load at close range and intuitively, thereby improving the accuracy of fault detection of EMU equipment and safety; wherein, the two-phase power output interface is electrically connected to the three-phase power input socket and the two-phase power input socket respectively, the three-phase power output interface is electrically connected to the three-phase power input socket and the two-phase power input socket respectively, the DC transformer is electrically connected to the three-phase power input socket and the two-phase power input socket respectively, the DC power output interface is electrically connected to the DC transformer, the two-phase power output interface is used to convert the input voltage into a first rated voltage, the three-phase power output interface is used to convert the input voltage into a second rated voltage, and the DC transformer is used to convert the input voltage into a third rated voltage, thereby realizing the conversion between different power supply voltages, being able to supply power to the faulty load separately, and reducing the limitations of the on-site power supply demand for the EMU.

[0018] Other features and advantages of the present invention will be described in the following description and will become apparent in part from the description. The purpose and other advantages of the present invention can be achieved and obtained through the structures particularly pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the technical solution of the present invention and do not constitute a limitation on the technical solution of the present invention.

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0021] Figure 1 This is an overall structural diagram of a multifunctional power conversion device provided by some embodiments of the present utility model;

[0022] Figure 2 is a top view of a multifunctional power conversion device provided by some embodiments of the present utility model;

[0023] Figure 3 This is a circuit connection diagram of a multifunctional power conversion device provided by some embodiments of the present utility model;

[0024] Figure 4 is a side view of a multifunctional power conversion device provided by some embodiments of the present utility model;

[0025] Figure 5 This is another side view of the multifunctional power conversion device provided by some embodiments of the present invention.

[0026] Figure numerals: box 100, control panel 200, two-phase power output interface 201, three-phase power output interface 202, DC power output interface 203, two-phase power input socket 204, three-phase circuit breaker 205, single-phase circuit breaker 206, first voltage and current meter 207, second voltage and current meter 208, first adjustment knob 209, second adjustment knob 210, DC output switch 211, first air outlet 212, second air outlet 213, three-phase power input socket 300, DC transformer 400. DETAILED DESCRIPTION

[0027] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0028] In the description of the present invention, if the first and second are described only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features, it should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0029] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0030] Since the intercity EMUs entered service, numerous faults have been discovered during maintenance on various air conditioning condenser fans, including abnormal noise from ventilation fans and traction cooling fans. However, due to on-site operational limitations, it's impossible to independently power each air conditioning condenser fan to identify the fault point while the train is powered on, severely hindering fault location identification during operations.

[0031] Secondly, due to design defects in the power equipment of some systems of the EMU, harsh operating environment, improper maintenance and long service life, the power equipment often malfunctions, such as the wiper device in the driver's cab, sunshade, water tank pump, opening and closing cover mechanism, seat socket, etc. During the vehicle power-on process, since the operating voltage of each power supply device may be different, it is impossible to uniformly and independently power each power supply device to confirm the fault point, and it is also impossible to observe the operating status of each power supply device at close range.

[0032] Based on this, the utility model provides a multifunctional power conversion device, which realizes the conversion between different power supply voltages, can supply power to the faulty load separately, reduces the limitation of the on-site power supply demand for the EMU, and at the same time, can also observe the operating status of each faulty load at close range and intuitively, thereby improving the accuracy and safety of EMU equipment fault detection.

[0033] Therefore, the embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0034] Reference Figure 1 、 Figure 2 、 Figure 3 、 Figure 4and Figure 5 As shown, Figure 1 This is an overall structural diagram of a multifunctional power conversion device provided by some embodiments of the present invention. Figure 2 is a top view of a multifunctional power conversion device provided by some embodiments of the present invention, Figure 3 This is a circuit connection diagram of a multifunctional power conversion device provided by some embodiments of the present invention. Figure 4 is a side view of a multifunctional power conversion device provided by some embodiments of the present invention, Figure 5 This is another side view of the multifunctional power conversion device provided by some embodiments of the present invention. The multifunctional power conversion device includes a box body 100. The box body 100 includes a control panel 200, a three-phase power input socket 300 and a DC transformer 400. The control panel 200 is fixed to the upper surface of the box body 100, the three-phase power input socket 300 is arranged on the outer side of the box body 100, and the DC transformer 400 is arranged inside the box body 100. A two-phase power output interface 201, a three-phase power output interface 202, a DC power output interface 203 and a two-phase power input socket 204 are fixed above the control panel 200. Based on the integrated control panel 200, a centralized connection between different fault loads and the multifunctional power conversion device is realized, and the operating status of each fault load can be observed closely and intuitively, thereby improving the accuracy and safety of fault detection of EMU equipment.

[0035] Among them, the two-phase power output interface 201 is electrically connected to the three-phase power input socket 300 and the two-phase power input socket 204 respectively, the three-phase power output interface 202 is electrically connected to the three-phase power input socket 300 and the two-phase power input socket 204 respectively, the DC transformer 400 is electrically connected to the three-phase power input socket 300 and the two-phase power input socket 204 respectively, the DC power output interface 203 is electrically connected to the DC transformer 400, the two-phase power output interface 201 is used to convert the input voltage into a first rated voltage, the three-phase power output interface 202 is used to convert the input voltage into a second rated voltage, and the DC transformer 400 is used to convert the input voltage into a third rated voltage, thereby realizing the conversion between different power supply voltages, being able to supply power to the faulty load separately, and reducing the limitations of the on-site power supply demand for the EMU.

[0036] In some possible embodiments, the second rated voltage (AC voltage) output by the two-phase power output interface 201 is 220V, the second rated voltage (AC voltage) output by the three-phase power output interface 202 is 380V, the third rated voltage (DC voltage) output by the DC power output interface 203 is 0-110V, the AC voltage input by the two-phase power input socket 204 is 220V, and the AC voltage input by the three-phase power input socket 300 is 380V.

[0037] It should be noted that the box 100 is a plastic vibration-proof safety box with dimensions of 380 mm*305 mm*139 mm in length, width and height. The three-phase power input socket 300 is a 5-core 32A concealed connector socket.

[0038] Further, from Figure 2 and Figure 3 It can be seen that a three-phase circuit breaker 205 and a single-phase circuit breaker 206 are also fixed above the control panel 200. The three-phase circuit breaker 205 is electrically connected between the three-phase power input socket 300 and the three-phase power output interface 202, and the single-phase circuit breaker 206 is electrically connected between the two-phase power input socket 204 and the two-phase power output interface 201. The three-phase circuit breaker 205 is used as a current input control switch for the three-phase power input socket 300, and the single-phase circuit breaker 206 is used as a current input control switch for the two-phase power input socket 204.

[0039] It should be noted that the three-phase circuit breaker 205 is a 3P+N leakage protection air switch, and the maximum fuse current of the three-phase circuit breaker 205 is 20A. The single-phase circuit breaker 206 is a 1P+N double-input and double-output leakage protection air switch, and the maximum fuse current of the single-phase circuit breaker 206 is 10A.

[0040] Further, from Figure 2 and Figure 3 It can be seen that a first voltage and ammeter 207 is also fixed above the control panel 200. The first voltage and ammeter 207 is electrically connected between the three-phase circuit breaker 205 and the single-phase circuit breaker 206. The first voltage and ammeter 207 is used to detect whether the power current input by the three-phase power input socket 300 or the two-phase power input socket 204 is normal. The first voltage and ammeter 207 is a digital AC and DC voltage and ammeter.

[0041] In addition, a second voltage and ammeter 208 is fixed above the control panel 200. The second voltage and ammeter 208 is electrically connected between the DC power output interface 203 and the DC transformer 400. The second voltage and ammeter 208 is used to detect the current output by the DC power output interface 203. The second voltage and ammeter 208 is a digital AC and DC voltage and ammeter.

[0042] Further, from Figure 2 and Figure 3It can be seen that a first adjusting knob 209 and a second adjusting knob 210 are fixed above the control panel 200. The first adjusting knob 209 is electrically connected to the DC transformer 400, and the second adjusting knob 210 is electrically connected to the DC transformer 400. The first adjusting knob 209 is used to adjust the voltage output by the DC transformer 400, and the second adjusting knob 210 is used to adjust the current output by the DC transformer 400. The voltage adjustment range of the first adjusting knob 209 is 0-110V, and the voltage adjustment range of the second adjusting knob 210 is 0-4A.

[0043] It should be noted that a DC output switch 211 is further provided above the control panel 200 , and the DC output switch 211 is electrically connected between the DC power output interface 203 and the DC transformer 400 .

[0044] Further, from Figure 2 It can be seen that a first air outlet 212 is further provided above the control panel 200 , and the first air outlet 212 is used to transmit the hot air of the box 100 to the outside.

[0045] And, from Figure 4 and Figure 5 It can be seen that a second air outlet 213 is further provided on the outer side of the box body 100 , and the second air outlet 213 is used to transmit cold air from the outside to the inside of the box body 100 .

[0046] It should be noted that the three-phase power output interface 202 includes three copper terminals, the two-phase power output interface 201 includes two copper terminals, and the DC power output interface 203 includes two copper terminals. The plug specifications of the copper terminals are all M4×36, and the jack diameter of the copper terminals is 4mm.

[0047] Among them, the colors of the three copper terminals in the three-phase power output interface 202 are yellow, green and red respectively, the colors of the two copper terminals in the two-phase power output interface 201 are red and black respectively, and the colors of the two copper terminals in the DC power output interface 203 are red and blue respectively.

[0048] Furthermore, the maximum output current of the two-phase power output interface 201 is 20A, and the maximum output current of the three-phase power output interface 202 is 20A.

[0049] In some possible embodiments, an input cable is connected to the three-phase power input socket 300, and then the three-phase circuit breaker 205 is closed. It is confirmed that the first voltage and current meter 207 constantly displays a voltage of 220V, thereby confirming that the corresponding line of the current three-phase power input socket 300 is in a normal conduction state. Then, the three-phase circuit breaker 205 is disconnected, and an output cable is connected to the three-phase power output interface 202. Finally, the three-phase circuit breaker 205 is closed again to achieve conversion between three-phase AC voltage 380V and three-phase AC voltage 380V.

[0050] In some possible embodiments, an input cable is connected to the three-phase power input socket 300, and then the three-phase circuit breaker 205 is closed. It is confirmed that the first voltage and current meter 207 constantly displays a voltage of 220V, thereby confirming that the corresponding line of the current three-phase power input socket 300 is in a normal conduction state. Then, the three-phase circuit breaker 205 is disconnected, and an output cable is connected to the two-phase power output interface 201. Finally, the three-phase circuit breaker 205 is closed again to achieve conversion between the three-phase AC voltage of 380V and the two-phase AC voltage of 220V.

[0051] In some possible embodiments, an input cable is connected to the three-phase power input socket 300, and then the three-phase circuit breaker 205 is closed. It is confirmed that the first voltage and current meter 207 constantly displays a voltage of 220V, thereby confirming that the corresponding line of the current three-phase power input socket 300 is in a normal conductive state. Then, an output cable is connected to the DC power output interface 203, and the single-phase circuit breaker 206 is closed. The first adjustment knob 209 and the second adjustment knob 210 are adjusted, and finally the DC output switch 211 is closed to achieve conversion between the three-phase AC voltage of 380V and the adjustable DC voltage of 24V-110V.

[0052] In some possible embodiments, an input cable is connected to the two-phase power input socket 204, and then the single-phase circuit breaker 206 is closed. It is confirmed that the first voltage and current meter 207 constantly displays a voltage of 220V, thereby confirming that the line corresponding to the current two-phase power input socket 204 is in a normal conduction state. Then, the single-phase circuit breaker 206 is disconnected, and an output cable is connected to the two-phase power output interface 201. Finally, the single-phase circuit breaker 206 is closed again to achieve conversion between two-phase AC voltage 220V and two-phase AC voltage 220V.

[0053] In some possible embodiments, an input cable is connected to the two-phase power input socket 204, and then the single-phase circuit breaker 206 is closed. It is confirmed that the first voltage and current meter 207 constantly displays a voltage of 220V, thereby confirming that the corresponding line of the current two-phase power input socket 204 is in a normal conductive state. Then, an output cable is connected to the DC power output interface 203, and the single-phase circuit breaker 206 is closed. The first adjustment knob 209 and the second adjustment knob 210 are adjusted, and finally the DC output switch 211 is closed. This can achieve conversion between the two-phase AC voltage of 220V and the adjustable DC voltage of 24V-110V.

[0054] It should be understood that in the present invention, "at least one (item)" refers to one or more, and "plurality" refers to two or more. "And / or" is used to describe the association relationship of associated objects, indicating that there can be three relationships. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0055] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A multifunctional power conversion device, characterized in that: include: A box body, the box body including a control panel, a three-phase power input socket, and a DC transformer. The control panel is fixed to the upper surface of the box body, the three-phase power input socket is provided on the outer side of the box body, and the DC transformer is provided inside the box body. A two-phase power output interface, a three-phase power output interface, a DC power output interface, and a two-phase power input socket are fixed above the control panel. The two-phase power output interface is electrically connected to the three-phase power input socket and the two-phase power input socket respectively, the three-phase power output interface is electrically connected to the three-phase power input socket and the two-phase power input socket respectively, the DC transformer is electrically connected to the three-phase power input socket and the two-phase power input socket respectively, the DC power output interface is electrically connected to the DC transformer, the two-phase power output interface is used to convert the input voltage into a first rated voltage, the three-phase power output interface is used to convert the input voltage into a second rated voltage, and the DC transformer is used to convert the input voltage into a third rated voltage.

2. The multifunctional power conversion device according to claim 1, wherein: A three-phase circuit breaker and a single-phase circuit breaker are also fixed above the control panel. The three-phase circuit breaker is electrically connected between the three-phase power input socket and the three-phase power output interface, and the single-phase circuit breaker is electrically connected between the two-phase power input socket and the two-phase power output interface. The three-phase circuit breaker is used as a current input control switch for the three-phase power input socket, and the single-phase circuit breaker is used as a current input control switch for the two-phase power input socket.

3. The multifunctional power conversion device according to claim 2, characterized in that: The three-phase circuit breaker is a 3P+N leakage protection air switch, and the maximum fuse current of the three-phase circuit breaker is 20A. The single-phase circuit breaker is a 1P+N double-input and double-output leakage protection air switch, and the maximum fuse current of the single-phase circuit breaker is 10A.

4. The multifunctional power conversion device according to claim 3, characterized in that: A first voltage and ammeter is also fixed above the control panel. The first voltage and ammeter is electrically connected between the three-phase circuit breaker and the single-phase circuit breaker. The first voltage and ammeter is used to detect whether the power current input by the three-phase power input socket or the two-phase power input socket is normal. The first voltage and ammeter is a digital AC and DC voltage and ammeter.

5. The multifunctional power conversion device according to claim 1, wherein: A second voltage and ammeter is also fixed above the control panel. The second voltage and ammeter is electrically connected between the DC power output interface and the DC transformer. The second voltage and ammeter is used to detect the current output by the DC power output interface. The second voltage and ammeter is a digital AC and DC voltage and ammeter.

6. The multifunctional power conversion device according to claim 1, characterized in that: A first adjustment knob and a second adjustment knob are also fixed above the control panel. The first adjustment knob is electrically connected to the DC transformer, and the second adjustment knob is electrically connected to the DC transformer. The first adjustment knob is used to adjust the voltage output by the DC transformer, and the second adjustment knob is used to adjust the current output by the DC transformer. The voltage adjustment range of the first adjustment knob is 0-110V, and the voltage adjustment range of the second adjustment knob is 0-4A.

7. The multifunctional power conversion device according to claim 1, wherein: A DC output switch is also provided above the control panel, and the DC output switch is electrically connected between the DC power output interface and the DC transformer.

8. The multifunctional power conversion device according to claim 1, wherein: A first air outlet is provided above the control panel, and the first air outlet is used to transmit the hot air from the box to the outside. A second air outlet is provided on the outer side of the box, and the second air outlet is used to transmit the cold air from the outside to the inside of the box.

9. The multifunctional power conversion device according to claim 1, wherein: The three-phase power output interface includes three copper terminals, the two-phase power output interface includes two copper terminals, and the DC power output interface includes two copper terminals. The plug specifications of the copper terminals are all M4×36, and the jack diameters of the copper terminals are all 4mm.

10. The multifunctional power conversion device according to claim 1, wherein: The maximum output current of the two-phase power output interface is 20A, and the maximum output current of the three-phase power output interface is 20A.

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