Connector arrangement structure for power conversion device, power conversion device

Abstract

Noise resistance is improved by shortening the length of the cable connecting the two connectors. [Solution] A control board 5 is attached to the top of a power module 2. A bus bar 6 connected to the power module 2 is inserted into a hole in the board 4 of the current sensor 4. A connector 5a of the control board 5 is arranged above (on the U side of) the connector 4a of the board 4. The connector 5a of the board 5 is arranged so as to be connectable with a connector 10a of a cable 10 from the side, as shown by arrow Q. The connector 4a of the board 4 is arranged so as to be connectable with a connector 10b of a cable 10 from above, as shown by arrow S. Furthermore, the connector 5a is arranged offset from the connector 4a of the board 4 in the width direction of the control board 5.

Description

[Technical Field]

[0001] The present invention relates to a connector arrangement structure for communicating signals from a current sensor of a power conversion device to a control board, and to a power conversion device equipped with the arrangement structure. [Background technology]

[0002] In inverter devices that use semiconductor switching elements such as IGBTs to convert DC voltage to AC voltage and supply power to loads such as motors, the inverter's AC output current is often measured and used for controlling the inverter device.

[0003] Such a technology is known from Patent Document 1, in which a current sensor and a control circuit board are connected by a signal cable. In this technology, the control circuit board generates an on / off command for the IGBT based on the current detection value received from the current sensor, and performs the switching operation of the IGBT. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2014-241726 Summary of the Invention [Problem to be solved by the invention]

[0005] In Patent Document 1, the connector of the current sensor connected to the signal cable and the connector of the control circuit board are both oriented in the same direction (horizontal), which increases the length of the cable for routing the signal cable, and there is a risk of electromagnetic noise generated by IGBT switching being superimposed on the cable signal, causing malfunction.

[0006] The present invention has been made to solve such conventional problems, and aims to improve noise resistance by shortening the length of the cable connecting two connectors. [Means for solving the problem]

[0007] (1) One aspect of the present invention is a power supply comprising a power module, a control board, and a current sensor, A connector arrangement structure of a power conversion device that communicates signals from the current sensor to the control board, The control board is attached to the top of the power module, a cable connecting the connector of the control board and the connector of the current sensor board; a bus bar connected to the power module is inserted into the hole of the current sensor; the connector of the control board is disposed above the connector of the current sensor board in the up-down direction of the power module, The connector of the circuit board of the current sensor is arranged so that the cable can be connected from above and below. The connector of the control board is characterized in that it is arranged so that the cable can be connected from a lateral direction perpendicular to the vertical direction.

[0008] (2) Another aspect of the present invention is a power supply comprising a power module, a control board, and a current sensor, A connector arrangement structure of a power conversion device that communicates signals from the current sensor to the control board, the control board is attached to a side surface of the power module, a cable connecting the connector of the control board and the connector of the current sensor board; a bus bar connected to the power module is inserted into the hole of the current sensor; the connector of the control board is disposed above the connector of the current sensor board in the up-down direction of the power module, The connector of the circuit board of the current sensor is arranged so that the cable can be connected from the side surface, The connector of the control board is characterized in that it is arranged so that the cable can be connected from a lateral direction perpendicular to the side direction.

[0009] In each of the above aspects, in the left-right direction of the control board, The connector of the control board may be disposed offset from the connector of the current sensor board. [Effects of the Invention]

[0010] According to the present invention, noise resistance can be improved by shortening the length of the cable connecting the two connectors. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a side view showing a state in which a current sensor board and a control board of a power conversion device according to an embodiment of the present invention are connected by a cable. [Figure 2] 2 is a plan view showing the connector arrangement structure of the current sensor board and the control board in FIG. 1. DETAILED DESCRIPTION OF THE INVENTION

[0012] The connector arrangement structure for a current sensor of a power conversion device according to an embodiment of the present invention will be described below. This connector arrangement structure is primarily used in inverter devices for driving vehicles such as electric vehicles and hybrid vehicles, and effectively utilizes the space within the housing by arranging the connectors that communicate signals from the current sensor to the control board in a three-dimensional manner. [Example]

[0013] 1 and 2, reference numeral 1 indicates an embodiment of the connector arrangement structure. The connector arrangement structure of this embodiment is arranged inside the housing of an inverter device.

[0014] (1) Configuration example This embodiment includes a power module 2 equipped with an IGBT (power semiconductor transistor), a current sensor 3 that measures the inverter's AC output current, a circuit board 4 for the current sensor 3, and a control board 5 that generates an on / off command for the IGBT based on the current detection value received from the current sensor 3, causing the IGBT to perform a switching operation. The current sensor board 4 and the control board 5 are connected by a cable 10 (see FIG. 1). As shown in FIGS. 1 and 2, the power module 2 has a flat, approximately rectangular parallelepiped shape. Furthermore, the direction of the surface on which the terminals 2a are located is defined herein as the upward direction (the direction of the arrow U in FIG. 2). Note that the vertical direction of the power module 2 (the directions of the arrows U and D) does not necessarily have to coincide with the vertical direction within the housing.

[0015] In this example, a power module 2 and a current sensor 3 are arranged opposite each other, and a control board 5 is arranged above the power module 2. A three-phase bus bar 6 for connecting to a load (such as a motor) is connected to a terminal 2a of the power module 2. The bus bar 6 extends toward the current sensor board 4 and is inserted into a hole (not shown) in the current sensor 3.

[0016] This enables the sensor IC 3a of the current sensor 3 to detect the inverter AC output current from the magnetic flux of the bus bar 6. Here, the current sensor board 4 is positioned at a 90-degree angle to the control board 5, and both boards 4, 5 are equipped with connectors 4a, 5a for cable connection.

[0017] 2, connector 5a is disposed at position A, while connector 4a is disposed at position B. That is, as shown in FIG. 2, connector 5a is disposed above connector 4a (on the side of arrow U) in the up-down direction (directions of arrows U and D) of power module 2.

[0018] In this sense, connector 5a is disposed farther upward (in the direction of arrow U) from power module 2 than connector 4a. Here, the connector pins of connector 4a face upward (in the direction of arrow U), while the connector pins of connector 5a face horizontally (in the direction of arrow P) perpendicular to the upward direction.

[0019] In addition, the connectors 4a, 5a are offset from each other in the width direction of the control board 5 (left and right direction of the power module 2: directions of arrows R and L in FIG. 1) so as not to overlap. Furthermore, although the current sensor board 4 is exposed to the outside in FIG. 1, this is not limiting, and only the connector 4a may be exposed from the case of the current sensor 3.

[0020] (2) Connection status of cable 10 2, a state in which the current sensor board 4 and the control board 5 are connected by the cable 10 will be described. Here, one connector 10a of the cable 10 is joined to the connector 5a, and the other connector 10b is joined to the connector 4a. This makes it possible to communicate the value of the current flowing through the busbar 6 to the control board 5, and the inverter device is controlled using the detected current value.

[0021] 2, the connector 5a is disposed at position A, while the connector 4a is disposed at position B. In other words, the positional relationship between the control board 5 and the current sensor board 4 is determined so that the connector position (position A) of the control board 5 is disposed above the connector position (position B) of the current sensor board 4 in the vertical direction of the power module 2.

[0022] This positional relationship allows connectors 10a, 10b of cable 10 to be inserted into connectors 5a, 4a from the orthogonal vertical and horizontal directions, as indicated by arrows Q and S. That is, as indicated by arrow S, connector 10b is inserted into connector 4a from above (direction U) and joined, thereby electrically connecting the connector pins. Also, as indicated by arrow Q, connector 10a of cable 10 is inserted into connector 5a from the horizontal directions, as indicated by arrow Q, thereby electrically connecting the connector pins.

[0023] This allows the routing distance (cable length) of the cable 10 to be shortened, thereby improving noise resistance. Also, the connectors 10a and 10b of the cable 10 can be easily inserted and removed, improving assembly efficiency.

[0024] Furthermore, since connectors 4a and 5a are positioned so that they do not overlap in the left-right direction in Figure 1, there is more space available for inserting and removing connector 4a, making the work easier and improving workability.

[0025] The present invention is not limited to the above-described embodiment, and can be modified and implemented within the scope of the claims. For example, if the control board 5 is provided on a side surface in the left and right directions (in the directions of arrows R and L) of the power module 2 rather than on the top of the power module 2, the connector 5a will be arranged on the same side surface of the power module 2.

[0026] In this case, in the vertical direction (direction of arrows U and D) of the power module 2, the connector 5a is positioned above the connector 4a (towards the arrow U), the connector 5a is positioned so that its connector pins face the direction of arrow P, and both connectors 4a and 5a are positioned offset in the left-right direction (direction of arrows R and L).

[0027] This allows the connectors 10a, 10b of the cable 10 to be inserted into the connectors 5a, 4a from both the right-left direction and the front-rear lateral direction, which are orthogonal to each other, to be connected. That is, the connector 10b can be inserted into the connector 4a from above the power module 2 to be joined, and the connector 10a can be inserted from the front-rear lateral direction (the direction of arrow Q) to be joined, thereby achieving the same effect as in the embodiment.

[0028] Furthermore, the present invention is not limited to inverter devices, but can be applied to any power conversion device that includes a power module 2, a current sensor 3, and a control board 5. [Explanation of symbols]

[0029] 2...Power module 2a…Terminal 3...Current sensor 4...Current sensor board 4a, 5a...connector 5...Control board 6... Bus bar 10...Cable

Claims

1. The power module includes a control board and a current sensor. A connector arrangement structure of a power conversion device that communicates signals from the current sensor to the control board, The control board is attached to the top of the power module, a cable connecting the connector of the control board and the connector of the current sensor board; a bus bar connected to the power module is inserted into the hole of the current sensor; the connector of the control board is disposed above the connector of the current sensor board in the up-down direction of the power module, The connector of the circuit board of the current sensor is arranged so that the cable can be connected from above and below. The connector of the control board is arranged so that the cable can be connected from a lateral direction perpendicular to the vertical direction. A connector arrangement structure for a power conversion device characterized by:

2. The power module includes a control board and a current sensor. A connector arrangement structure of a power conversion device that communicates signals from the current sensor to the control board, the control board is attached to a side surface of the power module, a cable connecting the connector of the control board and the connector of the current sensor board; a bus bar connected to the power module is inserted into the hole of the current sensor; the connector of the control board is disposed above the connector of the current sensor board in the up-down direction of the power module, The connector of the circuit board of the current sensor is arranged so that the cable can be connected from the side surface, The connector of the control board is arranged so that the cable can be connected from a lateral direction perpendicular to the lateral direction. A connector arrangement structure for a power conversion device characterized by:

3. In the left-right direction of the control board, The connector of the control board is disposed offset from the connector of the current sensor board.

3. The connector arrangement structure for a power converter according to claim 1 or 2.

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