JP2009027896A - Inverter device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inverter device constituted so that fitting positions of auxiliary substrates of a plurality of kinds may be limited. <P>SOLUTION: Projections 6A to 6C are provided at positions different each other of a sidewall 1a of a main body case 1, and positions or sizes of notches 8 are made different according to the kinds of the auxiliary substrates 7, by which the fitting positions of the auxiliary substrates 7 of a plurality of the kinds are limited to any of an A port to C port, according to combinations of the positions of the projections 6A to 6C with the positions or the sizes of the notches 8 provided at the auxiliary substrates 7. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an inverter device in which two or more types of auxiliary boards (option boards) can be mounted inside a case.

In general, an inverter device that receives AC power from a commercial AC power source or the like, converts it into AC power having an arbitrary frequency, and drives an AC motor is generally used. This inverter device has a main circuit section including an inverter switching element for power conversion, a control circuit section for controlling switching of the switching element, and the like. In many cases, the main circuit unit, the control circuit unit, etc. are housed in a main body case to form a unitized inverter device.
There are various types of inverter devices such as high-function type, general-purpose type, or low-function type depending on the application, but various option boards are prepared to meet the needs of a wide variety of users. An optional board having a required function is selected and mounted.
For example, Patent Document 1 discloses an inverter device configured such that a space for arranging an additional circuit board is provided inside a main body case of the inverter device, and an optional board is mounted in this space to operate. .
Japanese Patent Laid-Open No. 6-311760

In the conventional inverter device, the option board is accommodated in a predetermined position in the main body case, and the connection plug on the option board side is connected to the connection connector provided on the control circuit board on which the control circuit unit is mounted. In order to install multiple option boards at the same time, it is necessary to secure a space for installing the multiple option boards and provide a plurality of connectors on the control circuit board. become.
In this case, if the shape of the option board and the shape of the connector for connection are the same, it may be installed at the wrong position. If the option board is installed at the wrong position, the option board or the control circuit board may be damaged. There was a problem to do.
On the other hand, the mounting positions of all the option boards of a plurality of types can be mounted at any position without limitation. To that end, a connector for connecting a plurality of signal lines on the control circuit board is provided. Must be connected to each other, and it is necessary to assign connector pins so that each signal line does not overlap on the control circuit board, which increases the board area or the number of pins of the connector for connection. There has been a problem that the size of the apparatus main body is increased.
Furthermore, when a plurality of option boards are simultaneously mounted on the same plane, there may be no gap between adjacent option boards. In such a state, if you try to remove the option board once mounted, the option board will be removed by grasping the mounting parts on the option board, so the mounting parts may be damaged or the mounting parts may come off the board. There was a problem such as.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an inverter device that solves the above-described problems and can limit the mounting positions of a plurality of types of auxiliary boards.

In order to solve the above-described problem, the present invention provides an inverter device capable of mounting a plurality of two or more types of auxiliary boards on the inner side of the main body case, wherein a plurality of protrusions are provided at different positions inside the main body case, Is provided in the auxiliary substrate, and the position or size of the notch is varied depending on the type of the auxiliary substrate.
Further, in the above configuration, the auxiliary substrate is provided with a substrate removal knob, or a substrate removal notch or hole.

According to the present invention, the plurality of protrusions are provided at different positions on the inner side of the main body case, the notches into which the protrusions can be fitted are provided on the auxiliary board, and the positions of the notches or By making the size different, the location where the auxiliary board is attached is limited by the combination of the position of the protrusion provided on the main body case and the position or size of the notch provided on the auxiliary board. There is no need to make a mistake in the board mounting position. Accordingly, since the plurality of connection connectors on the control circuit board do not need to correspond to all types of auxiliary boards, the board area increases, the number of pins of the connection connector increases, and the apparatus main body Can be solved.
In addition, by providing a board removal knob, board removal notch, or board removal hole on the auxiliary board, even if multiple auxiliary boards are installed in close contact with each other, they are already installed. The auxiliary substrate can be easily removed.

Embodiments of the present invention will be described below with reference to the drawings. However, parts corresponding to each other in all the drawings in this specification are denoted by the same reference numerals, and description of the overlapping parts will be omitted as appropriate.
FIG. 1 is a front view showing a state in which an auxiliary board according to an embodiment of the present invention is not attached. 1 is a main body case of an inverter device, 2 is a main circuit terminal block having a plurality of main circuit terminals, and 3 is a plurality. A control circuit terminal block having individual control circuit terminals, 4 is a control circuit board on which control circuit components are mounted, and 5 is a connector for connection provided on the control circuit board 4.
In such an inverter device, a space (AC port) in which an after-mentioned auxiliary board (option board) 7 is arranged is provided above the control circuit board 4, and a plurality of auxiliary boards 7 are provided in this space. Can be mounted on the same plane at the same time. In this embodiment, a case where a maximum of three auxiliary boards 7 can be simultaneously mounted on each of the A to C ports will be described as an example, but the number of auxiliary boards 7 that can be simultaneously mounted is two or more. It only has to be 3 sheets.
2A and 2B are diagrams showing an auxiliary board 7 of the present invention, in which FIG. 2A is a front view, FIG. 2B is a side view, 7a is a connection plug for connecting to the connection connector 5, and 7b is An auxiliary board terminal block having a plurality of auxiliary board terminals, 7c is an auxiliary board mounting component mounted on the auxiliary board, 7d is a screw through hole, 7e is a knob for removing the board made of insulating resin, and 8 is It is a notch that fits into a projection 6 described later provided at the end of the auxiliary substrate 7.

As the auxiliary board 7, for example, a relay option board equipped with a relay circuit, a PG option board for obtaining a feedback signal from a speed sensor, an external digital signal (ON / OFF signal) such as an external switch, etc. There is a DI option board etc.
FIG. 3 is a view showing a state in which an auxiliary board showing an embodiment of the present invention is attached. (A) is a front view, (b) is an enlarged view of a main part, and FIG. 4 is an auxiliary view of the present invention. It is a perspective view of the state which mounted | wore the board | substrate.
In FIG. 3, 6A to 6C are protrusions provided on the side wall 1a of the main body case 1, and one protrusion 6A to 6C is provided for each of the A to C ports and is located at a different position in each port. Is provided. That is, the protrusion 6A is provided at a position higher than the vertical direction of the paper surface of the A port, the protrusion 6B is provided at a substantially middle position of the B port, and the protrusion 6C is a position lower than the C port. Is provided.
FIG. 3 shows a case where one auxiliary board 7 is attached to each of the A port and the B port. For example, a case where the auxiliary board 7 is attached to the A port will be described. First, the notch 8 of the auxiliary board 7 having a required function is fitted into the protrusion 6A, and the connection plug 7a of the auxiliary board 7 is inserted into the connection connector 5 in the A port. The connection between the control circuit board 4 and the auxiliary board 7 is provided by fitting the connection plug 7a and the connection connector 5 together. Thereafter, the screw through hole 7d is aligned with the position of the screw hole on the inverter device main body side, and the auxiliary board 7 is fixed by screw fastening with the screw 9.

At this time, among the plural types of auxiliary boards 7, only the auxiliary board 7 having the notches 8 that can be fitted to the protrusions 6A can be mounted. FIG. 5 is a diagram showing the relationship between the protrusion 6 and the notch 7, and 6A to 6C indicate the positions of the protrusions 6A to 6C provided in the A to C ports, respectively, and 7A, 7B, 7C, and 7AB. , 7ABC indicate the end portions of the auxiliary substrate 7 in which the positions or sizes of the notches 8 are different.
For example, the auxiliary substrate 7 indicated by 7AB is provided with a notch 8 having a position and size capable of fitting the protrusions 6A and 6B, and is fitted to the protrusion 6A or 6B at the position 6A or 6B. This indicates that it can be fitted, but cannot be fitted to the protrusion 6C at the position 6C. That is, the auxiliary board 7 indicated by 7AB can be attached to the A port or the B port, but cannot be attached to the C port.
Further, the auxiliary board 7 indicated by 7ABC is provided with notches 8 having positions and sizes that can fit all the protrusions 6A to 6C, and shows the auxiliary board 7 that can be attached to all ports. It is. Further, the auxiliary board 7 indicated by 7A is provided with a notch 8 having a position and a size capable of fitting only the projection 6A, and shows the auxiliary board 7 which can be attached only to the A port. , 7C indicate the auxiliary boards 7 that can be mounted only on the B port and the C port, respectively.

As described above, the protrusions 6A to 6C are provided at different positions on the side wall 1a of the main body case 1, and the position or size of the notch 8 is varied depending on the type of the auxiliary substrate 7, thereby providing a plurality of types of auxiliary substrates. 7, the place to be attached is limited to any one of A port to C port by a combination of the positions of the protrusions 6A to 6C and the position or size of the notch 8 provided on the auxiliary substrate 7.
In order to remove the attached auxiliary board 7, after removing the screw 9, the board removal knob 7e may be picked and pulled. By providing the board removal knob 7e on the auxiliary board 7 in this manner, even when the adjacent auxiliary boards 7 are mounted without gaps, the auxiliary board 7 can be easily removed without damaging the mounting component 7c. .
FIG. 6 is a front view showing another embodiment of the present invention, in which a board removal hole 7f and a board removal notch 7g are provided in the auxiliary board 7 in place of the board removal knob 7e. Only one or both of the substrate removal hole 7f and the substrate removal notch 7g may be provided for the auxiliary substrate 7. Thus, by providing the substrate removal hole 7f and the substrate removal notch 7g in the auxiliary substrate 7, even if the adjacent auxiliary substrate 7 is mounted without a gap, the auxiliary substrate 7 can be used with a finger or a simple jig. 7 can be easily removed.

The front view of the state which has not attached the auxiliary substrate which shows embodiment of this invention It is a figure which shows the auxiliary | assistant board | substrate of this invention, (a) is a front view, (b) is a side view It is a figure which shows the state which attached the auxiliary | assistant board | substrate which shows embodiment of this invention, (a) is a front view, (b) is a principal part enlarged view. The perspective view of the state which equipped the auxiliary substrate of this invention The figure which shows the relationship between the projection part of this invention, and a notch Front view showing another embodiment of the present invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Main body case 4 ... Control circuit board 5 ... Connector for connection 6 ... Projection part 7 ... Auxiliary board 8 ... Notch

Claims (3)

  In the inverter device capable of mounting a plurality of two or more types of auxiliary boards on the inner side of the main body case, a plurality of protrusions are provided at different positions on the inner side of the main body case, and notches into which the protrusions can be fitted are provided on the auxiliary board. The inverter device is characterized in that the position or size of the notch is varied according to the type of the auxiliary substrate.   2. The inverter device according to claim 1, wherein a knob for removing the substrate is provided on the auxiliary substrate. 2. The inverter device according to claim 1, wherein the auxiliary substrate is provided with a notch or a hole for removing the substrate.

Images