JP2020022321A - Power conversion device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a power conversion device capable of collecting internal data by non-contact communication. A power conversion device (100) includes a metal casing (1) having an opening (9) and a main circuit unit (10) housed in the casing (1) and converting a DC voltage and an AC voltage. The power conversion device 100 includes a communication circuit that is arranged inside the housing 1 so as to face the opening 9 and performs contactless communication with a device outside the housing 1. The power converter 100 can collect internal data by non-contact communication. [Selection diagram] Figure 8

Description

  The present invention relates to a power conversion device that converts between a DC voltage and an AC voltage.

  Power converters, such as power conditioners, that convert DC power to AC power and link them to the power grid, may cause an error if there is an abnormality such as a device failure or operation stoppage due to a malfunction of the protection function. Appropriate measures are required. A worker who repairs the power converter can accurately identify the cause of the abnormality by analyzing the internal data that is the data indicating the state inside the power converter. However, if it is necessary to attach a component such as a dedicated cable or use a special tool to read the internal data from the power conversion device, it will be difficult to collect the internal data.

  Patent Literature 1 discloses a multifunction peripheral having a wireless communication function that enables non-contact communication with an external device. Since the non-contact communication with the external device is enabled, data can be easily read from the inside of the multifunction peripheral without using a dedicated part and a special tool. Also in the power converter, the internal data can be read easily by non-contact communication, so that the internal data can be easily collected.

JP-A-2015-126512

  The power converter uses a metal housing that surrounds the entire power converter for the purpose of ensuring reliability. When the non-contact communication technology of Patent Literature 1 is applied to a power conversion device, in the power conversion device, non-contact communication is hindered by a metal housing. For this reason, the power converter has a problem that it is difficult to collect internal data by non-contact communication.

  The present invention has been made in view of the above, and an object of the present invention is to provide a power conversion device capable of collecting internal data by non-contact communication.

  In order to solve the above-described problems and achieve the object, a power conversion device according to the present invention includes a metal housing having an opening, and is housed in the housing, and performs conversion between a DC voltage and an AC voltage. And a communication circuit disposed inside the housing so as to face the opening and performing non-contact communication with a device outside the housing.

  ADVANTAGE OF THE INVENTION According to this invention, there exists an effect that collection of internal data by non-contact communication is attained.

Bottom view of power converter according to Embodiment 1 of the present invention Side view of the power converter shown in FIG. Front view of the power converter shown in FIG. Bottom view showing a state in which a design panel is removed from the power converter shown in FIG. Side view showing a state in which a design panel has been removed from the power converter shown in FIG. Front view showing a state in which a design panel has been removed from the power converter shown in FIG. FIG. 1 is a first diagram illustrating a configuration inside a housing in the power conversion device illustrated in FIG. 1. FIG. 2 is a second diagram illustrating an internal configuration of a housing in the power converter illustrated in FIG. 1. Sectional drawing of the part containing the design panel and the display substrate in the power converter shown in FIG. FIG. 2 is a diagram illustrating non-contact communication between the power conversion device illustrated in FIG. 1 and devices external to the power conversion device. FIG. 2 is a plan view of a display substrate included in the power converter illustrated in FIG. 1. The figure which shows a mode that the non-contact communication by the communication circuit which the power converter shown in FIG. FIG. 4 is a plan view of a switch board included in a power conversion device according to a modification of the first embodiment.

  Hereinafter, a power converter according to an embodiment of the present invention will be described in detail with reference to the drawings. The present invention is not limited by the embodiment.

Embodiment 1 FIG.
FIG. 1 is a bottom view of the power conversion device 100 according to the first embodiment of the present invention. FIG. 2 is a side view of the power converter 100 shown in FIG. FIG. 3 is a front view of the power converter 100 shown in FIG.

  The power conversion device 100 includes a metal housing 1 that forms an outer shell of the power conversion device 100. The housing 1 includes a metal case 3 that is a rectangular parallelepiped box with an open front, and a metal front panel 2 that closes the front of the case 3. Note that the X axis, the Y axis, and the Z axis shown in FIGS. 1 to 3 indicate directions when the power converter 100 is installed. The X-axis direction is a left-right direction, the Y-axis direction is a front-rear direction, and the Z-axis direction is a vertical direction.

  A design panel 4 made of resin is attached to the front panel 2. The display panel 7 is provided on the design panel 4. A design panel 5 made of resin is attached to a lower surface portion 3a forming a lower surface of the case 3. The design panel 5 is provided with a switch 6.

  FIG. 4 is a bottom view showing a state in which design panels 4 and 5 are removed from power conversion device 100 shown in FIG. FIG. 5 is a side view showing a state in which design panels 4 and 5 are removed from power conversion device 100 shown in FIG. FIG. 6 is a front view showing a state where design panels 4 and 5 are removed from power conversion device 100 shown in FIG.

  The front panel 2 has a rectangular opening 9. The design panel 4 covers the opening 9 from outside the housing 1. The dimension of the design panel 4 in the X-axis direction shown in FIGS. 1 to 3 is larger than the dimension of the opening 9 in the X-axis direction, and the dimension of the design panel 4 in the Z-axis direction is Larger than dimensions. The design panel 4 is attached by closing the opening 9 from the front of the front panel 2.

  The lower surface 3a of the case 3 is provided with a rectangular opening 8. The design panel 5 covers the opening 8 from outside the housing 1. The dimension of the design panel 5 shown in FIGS. 1 and 2 in the X-axis direction is larger than the dimension of the opening 8 in the X-axis direction, and the dimension of the design panel 5 in the Y-axis direction is Larger than dimensions. The design panel 5 is attached by closing the opening 8 from below the lower surface 3a.

  FIG. 7 is a first diagram showing the internal configuration of housing 1 in power conversion device 100 shown in FIG. FIG. 8 is a second diagram showing a configuration inside housing 1 in power conversion device 100 shown in FIG. FIG. 7 shows an XZ cross section of the case 3 and a state where each part provided inside the housing 1 is viewed from the front. FIG. 8 shows an XY cross section of the front panel 2 and the housing 1 and a state where each part provided inside the housing 1 is viewed from below. In FIG. 7, the opening 9 and the design panel 4 arranged in front of the configuration shown in FIG. 7 are represented by broken lines.

  The power conversion device 100 has a main circuit unit 10 housed in the housing 1. The main circuit unit 10 includes a substrate 11 on which a circuit including at least one of a converter for changing a DC current, an inverter for converting a DC voltage to an AC voltage, and an inverter for converting an AC voltage to a DC voltage is mounted. Have. The main circuit unit 10 includes a reactor 12 for a converter or an inverter, and a power semiconductor module 13 for a converter or an inverter.

  The main circuit section 10 having the power semiconductor module 13 which is an electronic component that is heated by driving is housed in the metal housing 1. The power conversion device 100 can house the main circuit unit 10 in the housing 1 which is a structure having fire resistance. Thereby, the power conversion device 100 can ensure high reliability.

  The power converter 100 includes a control board 15 on which a control circuit for controlling the main circuit unit 10 is mounted, and a control power board 14 on which a control power circuit for driving the control circuit and a display circuit described later are mounted. And The control power supply board 14 and the control board 15 are provided on a front surface of the board 11.

  The display substrate 16 is arranged inside the housing 1 so as to face the opening 9. The display substrate 16 includes a communication circuit for performing non-contact communication with a device external to the housing 1 and a display circuit for displaying the driving state of the main circuit unit 10 on the display unit 7 illustrated in FIG. Has been implemented. When an abnormality is detected in the power conversion device 100, the display circuit displays a code representing an item in which the abnormality is detected on the display unit 7. The display circuit also displays the operation state of the power conversion device 100 on the display unit 7.

  The communication circuit has a near field communication function of NFC (Near Field Communication) standard. A standard other than the NFC standard may be adopted for the short-range wireless communication function. The display board 16 is disposed apart from the board 11 on which the converter and the inverter that handle a larger current than the communication circuit and the display circuit are mounted. The control power supply board 14 and the display board 16 are connected via the wiring 23.

  The switch board 17 is arranged inside the housing 1 so as to face the opening 8 shown in FIG. The switch 6 for operating the drive of the main circuit unit 10 is mounted on the switch board 17. The switch board 17 is arranged apart from the board 11. The control board 15 and the switch board 17 are connected via the wiring 24.

  The base metal plate 20 and the heat sink 21 are provided inside the housing 1. The heat sink 21 is fixed to the base plate 20 by screws 27. The substrate 11 is supported by a heat sink 21. The heat sink 21 radiates heat generated from electronic components such as the reactor 12 and the power semiconductor module 13. The power conversion device 100 also has a terminal block 18 to which wiring for input and output of the converter and the inverter is connected, and an input port 22 through which the wiring is passed. The terminal block 18 is attached to a base metal plate 20.

  The power conversion device 100 includes a metal cover 25 that covers the periphery of the display substrate 16 other than the front side facing the opening 9 and covers the opening 9 from inside the housing 1. The cover 25 is attached to a surface inside the housing 1 on the front panel 2. The display substrate 16 is disposed in a space surrounded by the front panel 2 and the cover 25. The space in which the display substrate 16 is arranged is open at the opening 9, and the design panel 4 is closed by covering the opening 9. The cover 25 separates a space where the main circuit unit 10 is provided from a space where the display substrate 16 is provided. The cover 25 may be attached to the lower surface 3 a of the case 3 instead of being attached to the front panel 2. When the cover 25 is attached to the case 3, the display substrate 16 can be arranged in a space surrounded by the front panel 2 and the cover 25.

  The power conversion device 100 has a metal cover 26 that covers the periphery of the switch substrate 17 other than the lower side facing the opening 8 and covers the opening 8 from inside the housing 1. The cover 26 is attached to the surface of the lower surface 3a on the side inside the housing 1. The switch board 17 is disposed in a space surrounded by the lower surface 3a and the cover 26. The space where the switch board 17 is arranged is open at the opening 8, and the design panel 5 is closed by covering the opening 8. The cover 26 divides the inside of the housing 1 into a space in which the main circuit unit 10 is provided and a space in which the switch board 17 is provided. In the power conversion device 100, the space in which the main circuit unit 10 is provided can be sealed by a structure having fire resistance by partitioning the space inside the housing 1 by the covers 25 and 26.

  FIG. 9 is a cross-sectional view of a portion including the design panel 4 and the display substrate 16 in the power conversion device 100 shown in FIG. The cover 25 supports the display substrate 16 attached to the support 32. The sealing material 31 is provided between the cover 25 and the front panel 2. As the sealing material 31, packing made of flame-retardant resin or the like is used. The seal member 31 is also provided between the cover 26 shown in FIG. 8 and the lower surface 3a. The power converter 100 can seal the space in which the main circuit unit 10 is provided by providing the sealant 31. In order to seal the space in which the main circuit section 10 is provided, the sealing material 31 is also provided at the entrance 22 shown in FIG.

  When the cover 25 can be brought into close contact with the front panel 2, the seal member 31 between the cover 25 and the front panel 2 may not be provided. When the cover 26 can be brought into close contact with the lower surface 3a, the seal material 31 between the cover 26 and the lower surface 3a may not be provided. Also in this case, the power conversion device 100 can seal the space in which the main circuit unit 10 is provided by bringing the cover 25 into close contact with the front panel 2 or bringing the cover 26 into close contact with the lower surface 3a.

  FIG. 10 is a diagram illustrating non-contact communication between the power conversion device 100 illustrated in FIG. 1 and devices external to the power conversion device 100. The mobile terminal 40 is an example of a device external to the power conversion device 100, and has a near field communication function of the NFC standard. When the person holding the mobile terminal 40 holds the mobile terminal 40 in front of the design panel 4 shown in FIG. 9, the mobile terminal 40 is put out to a position where non-contact communication with the communication circuit is possible. Thus, the communication circuit of the display substrate 16 can perform non-contact communication with the mobile terminal 40.

  FIG. 11 is a plan view of the display substrate 16 included in the power conversion device 100 shown in FIG. FIG. 12 is a diagram illustrating a state in which non-contact communication is being performed between the communication circuit 42 included in the power conversion device 100 illustrated in FIG.

  A display circuit 41 and a communication circuit 42 are mounted on the display substrate 16. The display circuit 41 is arranged behind the display unit 7 shown in FIG. The communication circuit 42 has an antenna 43 that captures an electromagnetic wave from the portable terminal 40 and radiates the electromagnetic wave. In FIG. 11, the area where the display circuit 41 is mounted on the display substrate 16 and the area where the communication circuit 42 is mounted are indicated by broken lines. In FIG. 11, the opening 9 arranged in front of the display substrate 16 is represented by a broken line. Note that the antenna 43 only needs to transmit or receive an electromagnetic wave.

  The display circuit 41 and the communication circuit 42 are accommodated in the display substrate 16 within the range of the opening 9 when the opening 9 is projected on the display substrate 16. The power conversion device 100 can perform display on the display unit 7 of the design panel 4 because the display circuit 41 is provided within the range of the opening 9.

  Since the antenna 43 is provided in the range of the opening 9, the communication circuit 42 can capture electromagnetic waves from outside the housing 1 and radiate electromagnetic waves to the outside of the housing 1 through the opening 9. The design panel 4 made of resin can transmit electromagnetic waves, and covers the opening 9 without hindering non-contact communication by the communication circuit 42. Since non-contact communication between the outside of the housing 1 and the communication circuit 42 is not hindered, the power conversion device 100 can perform non-contact communication with a device outside the housing 1. Thereby, the power conversion device 100 can collect internal data by non-contact communication.

  Since the display circuit 41 and the communication circuit 42 are mounted on the display substrate 16 which is a common substrate, the display by the display circuit 41 and the non-contact communication by the communication circuit 42 can be performed by using one opening 9. The power conversion device 100 can reduce the number of steps for forming an opening in the front panel 2 as compared with a case where an opening for display and an opening for non-contact communication are separately provided, and can reduce manufacturing costs. Can be reduced.

  Abnormalities such as failure of the power conversion device 100 or operation stoppage due to malfunction of the protection function include stress from the outside of the housing 1, occurrence of a trouble inside the housing 1, deterioration of components of the power conversion device 100, and the like. It can be caused by various factors. The operator performs a measure according to the cause of the abnormality by analyzing the internal data of the power conversion device 100. The worker can easily read the internal data by holding a device capable of non-contact communication over the power conversion device 100 without attaching a component for reading the internal data or using a special tool. The operator can clarify the cause of the abnormality at an early stage by analyzing the read internal data. Even if the cause of the abnormality extends to a plurality of items in addition to the item displayed on the display unit 7, or if there is an unexpected abnormality different from the displayed item, the repair The labor in the work can be reduced. The worker can perform an appropriate treatment earlier than in a case where a response is performed based on the information displayed on the display unit 7.

  Reading of internal data by non-contact communication may be performed by a user. In this case, the user may request the repair together with the transmission of the internal data. By analyzing the internal data sent by the user, the operator can grasp the cause of the abnormality before going to repair. Also, even if a user requests repairs even though repairs are unnecessary, such as when the user mistakes the normal operation of the protection function for a failure, the workers will not be able to save the internal data. Based on this, it is possible to determine whether repair is necessary. As a result, it is possible to suppress unnecessary dispatch and unnecessary cost generation by the operator.

  The power converter 100 is not limited to the one having the display substrate 16 on which the display circuit 41 and the communication circuit 42 are mounted. The communication circuit 42 may be mounted on a board other than the board on which the display circuit 41 is mounted. FIG. 13 is a plan view of the switch board 17 included in the power conversion device 100 according to the modification of the first embodiment. In the modification shown in FIG. 13, the communication circuit 42 is mounted on the switch board 17. In FIG. 13, the opening 8 disposed below the switch board 17 is indicated by a broken line.

  The person holding the portable terminal 40 shown in FIG. 10 holds the portable terminal 40 under the design panel 5 shown in FIG. Be offered. Thereby, the communication circuit 42 can perform non-contact communication with the mobile terminal 40.

  The switch 6 and the communication circuit 42 are contained within the range of the opening 8 when the opening 8 is projected on the switch board 17. Since the antenna 43 is provided within the range of the opening 8, the communication circuit 42 can capture electromagnetic waves from outside the housing 1 and radiate electromagnetic waves to the outside of the housing 1 through the opening 8. The design panel 5 made of resin can transmit electromagnetic waves, and covers the opening 8 without hindering non-contact communication by the communication circuit 42. Since non-contact communication between the outside of the housing 1 and the communication circuit 42 is not hindered, the power conversion device 100 can perform non-contact communication with a device outside the housing 1. Thereby, also in the modified example, the power conversion device 100 can collect internal data by non-contact communication.

  Since the communication circuit 42 and the switch 6 are mounted on the switch substrate 17 which is a common substrate, the arrangement of the switch 6 and non-contact communication by the communication circuit 42 can be performed by using one opening 8. The power conversion device 100 can reduce the number of steps for forming an opening in the lower surface 3a as compared with a case where an opening for disposing the switch 6 and an opening for non-contact communication are separately provided. The manufacturing cost can be reduced.

  The communication circuit 42 may be mounted on a substrate apart from the substrate 11 on which the power semiconductor module 13 is mounted, and may be mounted on a substrate other than the display substrate 16 and the switch substrate 17. In the power conversion device 100, the display circuit 41 and the above-described control circuit may be mounted on a common substrate. The communication circuit 42 may be mounted on a common substrate with the display circuit 41 and the control circuit.

  In the board on which the communication circuit 42 is mounted, the communication circuit 42 only needs to include at least the antenna 43 within the range of the openings 8 and 9 when the openings 8 and 9 of the housing 1 are projected onto the board. . The dimensions of the openings 8 and 9 facing the communication circuit 42 are at least larger than the dimensions of the antenna 43 in a plan view of the communication circuit 42. Since the antenna 43 is contained in the range of the openings 8 and 9, the electromagnetic wave output from the antenna 43 radiates out of the housing 1 through the openings 8 and 9. Thereby, the power conversion device 100 can perform non-contact communication with a device outside the housing 1.

  According to the first embodiment, power conversion device 100 includes housing 1 having openings 8 and 9 and communication circuit 42 arranged to face opening 8 or opening 9, so that Non-contact communication with external devices can be performed. Thereby, power conversion device 100 has an effect that internal data can be collected by non-contact communication.

  The configurations described in the above embodiments are merely examples of the contents of the present invention, and can be combined with other known technologies, and can be combined with other known technologies without departing from the gist of the present invention. Parts can be omitted or changed.

  DESCRIPTION OF SYMBOLS 1 Housing, 2 front panel, 3 case, 3a lower surface part, 4,5 design panel, 6 switch, 7 display part, 8,9 opening, 10 main circuit part, 11 board, 12 reactor, 13 power semiconductor module, 14 Control power supply board, 15 control board, 16 display board, 17 switch board, 18 terminal block, 20 base metal plate, 21 heat sink, 22 inlet, 23, 24 wiring, 25, 26 cover, 27 screw, 31 sealing material, 32 support Body, 40 mobile terminal, 41 display circuit, 42 communication circuit, 43 antenna, 100 power converter.

Claims (6)

A metal housing having an opening,
A main circuit unit housed in the housing and performing conversion between a DC voltage and an AC voltage,
A communication circuit that is arranged to face the opening inside the housing and performs non-contact communication with a device outside the housing,
A power conversion device comprising: The board according to claim 1, further comprising: a metal cover that covers a periphery of the board on which the communication circuit is mounted, except for a side facing the opening, and covers the opening from the inside of the housing. Power converter. A display circuit for displaying a driving state of the main circuit unit,
The power converter according to claim 1, wherein the communication circuit and the display circuit are mounted on a common substrate. A switch for operating the drive of the main circuit unit,
The power converter according to claim 1, wherein the communication circuit and the switch are mounted on a common substrate. The communication circuit has an antenna that transmits or receives an electromagnetic wave,
The antenna according to any one of claims 1 to 4, wherein the antenna is housed within a range of the opening when the opening is projected onto the substrate, on a substrate on which the communication circuit is mounted. The power converter according to any one of the preceding claims. The power converter according to any one of claims 1 to 5, further comprising: a resin design panel that covers the opening from outside the housing.

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