JP6003703B2 - Power supply - Google Patents

Description

  The present invention relates to a power supply device having a transformer.

  For example, as a power supply device such as a DC-DC converter, a main circuit unit having a transformer and a rectifier circuit, a filter unit having a filter circuit for reducing voltage noise after power conversion by the main circuit unit, and these are accommodated. There is a power supply device having a case.

  In the above power supply device, the noise of the output voltage is reduced by the filter circuit having the noise filter function. However, when the magnetic flux leaking from the transformer (leakage magnetic flux) is linked to the filter unit, the noise is generated in the output voltage. There is a risk of getting on. Therefore, for example, as in the power supply device described in Patent Document 1, a shielding plate that shields leakage magnetic flux may be disposed between the main circuit portion including a transformer that is a source of leakage magnetic flux and the filter portion. Conceivable.

JP 2003-125584 A

However, if the shielding plate is attached in the case of the power supply device, the number of parts increases, the number of manufacturing steps increases, productivity decreases, and cost reduction may be difficult.
In addition, when a shielding plate for partitioning both the main circuit section and the filter section is installed in the case of the power supply device, a communication section for passing a bus bar that propagates the voltage converted in the main circuit section to the filter section Must be provided on the shielding plate. Further, a control circuit that controls voltage conversion by a transformer may be provided in the main circuit unit, and a bus bar for feeding back the converted voltage may be provided in the control circuit. The voltage to be fed back is preferably the one after noise is removed by the filter unit. Therefore, this feedback bus bar also needs to be provided through the same communication section as described above.

  When the two communication portions for passing the two bus bars are provided in the shielding plate in this manner, the leakage magnetic flux from the transformer may easily affect the filter portion through the communication portion. Further, if the communication portion is enlarged in order to pass the two bus bars through one communication portion, similarly, the leakage magnetic flux from the transformer may easily affect the filter portion.

  The present invention has been made in view of such a background, and an object of the present invention is to provide a power supply device capable of reducing the influence of noise caused by leakage magnetic flux, reducing costs, and improving productivity. .

One embodiment of the present invention includes a main circuit unit including a transformer, a rectifier circuit that rectifies power converted by the transformer, and a control circuit that controls conversion of power by the transformer.
A filter unit comprising a filter substrate for removing noise from the power rectified by the rectifier circuit;
A case comprising a conductor having a first housing part for housing the main circuit part and a second housing part for housing the filter part, a case body having an open surface on one side, the first housing part and the above A partition part formed integrally with the case body so as to partition the second storage part, and a lid part covering the open surface, the partition part including the first storage part and the second storage part. A case in which a slit portion communicating with the housing portion is formed;
A first bus bar that is electrically connected to the main circuit unit and the filter unit through the slit unit and propagates the voltage after rectified in the rectifier circuit to the filter unit;
A second bus bar that is electrically connected to the main circuit unit and the filter unit through the slit unit, and propagates the voltage after noise removal in the filter unit to the control circuit;
With
The slit portion is formed from the open surface side toward the opposite side,
The first bus bar and the second bus bar are arranged in a direction along which the slit portion is formed. (Claim 1)

  In the power supply device, the case includes the partition wall. The first accommodating portion and the second accommodating portion are partitioned by the partition portion, and the main circuit portion and the filter portion are individually accommodated in each accommodating portion. And the said partition part is integrally formed with the said case main body, and consists of a conductor. Therefore, the leakage magnetic flux from the transformer of the main circuit part is shielded by the partition wall part, and the leakage magnetic flux can be prevented from interlinking with the filter part. Thereby, the influence of the noise resulting from the leakage flux of the transformer on the output voltage can be reduced.

  Further, in the slit portion formed in the partition portion from the open surface side to the opposite side, the first bus bar and the second bus bar are arranged along the direction in which the slit portion is formed. Therefore, the width of the slit portion (width in a direction orthogonal to the direction in which the slit portion is formed) can be reduced. Therefore, the noise shielding effect by the partition wall can be sufficiently maintained. That is, the slit portion is formed from the open surface toward the opposite side, and the first bus bar and the second bus bar are arranged along this direction. Therefore, in arranging the first bus bar and the second bus bar in the slit portion, they may be arranged sequentially from the open surface side. Therefore, the width of the slit portion may be any width as long as one bus bar passes sufficiently, and the width can be reduced. As a result, the shielding effect can be secured by suppressing the leakage of magnetic flux from the slit portion.

  Moreover, since the said partition part is integrally formed with the said case main body, it is not necessary to assemble | attach the shielding board as another member for shielding of the said leakage magnetic flux. Therefore, the productivity of the power supply device can be improved and the cost can be reduced.

  As described above, according to the present invention, it is possible to provide a power supply device capable of reducing the influence of noise caused by leakage magnetic flux, reducing costs, and improving productivity.

The top view of the power supply device in the state which removed the cover part in Example 1. FIG. FIG. 2 is a partial cross-sectional view corresponding to a cross section taken along line II-II in FIG. The top view of the 2nd accommodating part in the state which installed the bus bar module in Example 1. FIG. The perspective view of the bus bar module in Example 1. FIG. The top view of the 2nd accommodating part in the state which installed the filter board | substrate in Example 1. FIG. FIG. 6 is a cross-sectional view taken along line VI-VI of the second housing portion in FIG. 2 is a partial cross-sectional view of a power supply device corresponding to a cross-section taken along line II-II in FIG.

  The power supply device is mounted on a vehicle such as an electric vehicle or a hybrid vehicle, and is configured to charge a low-voltage DC power source such as an auxiliary battery by stepping down a voltage of a high-voltage DC power source such as a driving battery. -It can be a DC converter.

  In the power supply device, when the cross-sectional shape of the first bus bar and the second bus bar in the slit portion is not a regular circle or a square, but a shape having a longitudinal direction and a short direction such as a rectangle or an ellipse. The first bus bar and the second bus bar may be arranged such that the longitudinal direction of each cross section in the slit portion is along the direction in which the slit portion is formed. In this case, since the short direction of the first bus bar and the second bus bar is the width direction of the slit portion, the width of the slit portion can be further reduced, and the magnetic flux from the slit portion can be reduced. Leakage can be further suppressed to further ensure the shielding effect.

  In the power supply apparatus, the first bus bar is insert-molded into a mold part made of an insulating material to constitute a bus bar module, and the mold part abuts on the second bus bar to position the second bus bar. It may have a positioning part (claim 2). In this case, since the positioning of the second bus bar is facilitated, the workability of attaching the second bus bar is good, and the productivity is improved.

In the above power supply device, the second bus bar in the slit portion can be those located on the open surface side of the first busbar (claim 6). In this case, since the second bus bar is placed on the positioning portion of the second bus bar provided on the first bus bar, the workability of attaching the second bus bar is further improved, and the productivity is improved.

In the above power supply device, a positioning unit included in the first bus bar may be assumed that the second bus bar is placed in with the V-shaped groove, the groove portion (claim 7). In this case, since the second bus bar placed on the positioning portion is positioned in the V-shaped groove, the second bus bar placed on the positioning portion may fall off the positioning portion. The occurrence of misalignment is prevented, the workability of attaching the second bus bar is further improved, and the productivity is improved.

In the above power supply apparatus, the positioning unit may be assumed to be disposed adjacent to the slit portion (claim 3). In this case, the second bus bar can be more reliably passed through the slit portion while being placed on the positioning portion, so that the workability of attaching the second bus bar is further improved and the productivity is improved.

In the above power supply device, the width of the positioning portion may be a larger than the width of the slit portion (claim 4). In this case, when the positioning part is viewed over the slit part, it is possible to prevent a gap from being generated between the outer edge of the slit part and the positioning part. Therefore, when the second bus bar is placed on the positioning portion, the second bus bar is surely placed on the positioning portion without being displaced from the positioning portion as long as the second bus bar is passed through the slit portion. Therefore, the workability of attaching the second bus bar is further improved, and the productivity is improved.

In the power supply apparatus, the mold portion of the bus bar module is disposed in the second housing portion, the filter substrate is fixed to the case body at two fixing portions , and the filter substrate is The mold portion is disposed so as to cover the open surface side , and the mold portion faces the filter substrate at a position that does not overlap with the two fixed portions when viewed from the open surface side. it can be assumed to have a protrusion protruding Te (claim 5). In this case, since there are only two fixing portions for the filter substrate, the space is saved, and the limited space in the second accommodating portion can be used more effectively. Accordingly, since the filter substrate is attached to the case main body with the two fixing portions, the filter substrate may be tilted in the direction of rotation about the imaginary line passing through the two fixing portions as the rotation axis. . Even in such a case, if the filter substrate is tilted to a predetermined angle or more, a part of the filter substrate comes into contact with the tip of the protruding portion of the mold portion, and the filter substrate is prevented from further tilting. The Thereby, when the filter substrate is attached, the filter substrate is prevented from being excessively tilted or misaligned, so that the workability of attaching the filter substrate is good and the productivity is improved.

  The protrusion may be provided such that a gap of a predetermined size is formed between the tip of the protrusion and the filter substrate. In this case, the protruding portion is prevented from interfering with the filter substrate in a state where the filter substrate is fixed to the two fixing portions. The magnitude | size of the said gap | interval is not specifically limited, For example, it can be 0.3 mm-1.5 mm. If it is such a range, the effect of the said protrusion part will be show | played further.

  Further, the protrusion can be a position where the filter substrate and the mold member overlap when viewed from the open surface side, and a position away from the straight line connecting the two fixing portions. The distance can be, for example, ¼ or more of the length in the longitudinal direction of the filter substrate. In this case, since the protruding portion is located far from the straight line, when the filter substrate is tilted as described above, the amount of movement of the filter substrate at the position is compared even if the tilt angle is very small. It will be big. As a result, the protruding portion can easily come into contact with the filter substrate, and the effects of the protruding portion can be sufficiently achieved.

  Further, the position of the protruding portion can be appropriately determined in consideration of the shape of the first bus bar, the moldability of the mold portion, the arrangement of elements on the filter substrate, and the like. For example, the position of the protruding portion is formed at a corner portion of the filter substrate that does not overlap with the two fixed portions when viewed from the open surface side. Can do. Also in this case, the effect by the said protrusion part can be show | played.

Example 1
An embodiment of the power supply apparatus will be described with reference to FIGS.
As shown in FIGS. 1 and 2, the power supply device 1 of this example includes a transformer 11, a rectifier circuit 12 that rectifies power converted by the transformer 11, and a control circuit 13 that controls conversion of power by the transformer 11. The main circuit unit 10 having In addition to the transformer 11, a switching circuit unit (not shown) is included. The switching circuit unit converts DC power input from the DC power supply 60 into AC power. Under the control of the control circuit 13, the transformer 11 steps down the primary voltage converted into alternating current by the switching circuit unit and generates a secondary voltage. The rectifier circuit unit 12 rectifies the secondary voltage stepped down by the transformer 11 and outputs it as DC power to the filter unit 20 side described later.

  The power supply device 1 includes a filter unit 20 including a filter substrate 21 that removes noise from the power rectified by the rectifier circuit 12. A capacitor and a choke coil (not shown) are mounted on the filter substrate 21 to form a noise filter circuit that removes high frequency noise. The secondary voltage after rectification is propagated to the output stabilizing unit 50 described later and output after noise is removed by the filter substrate 21.

  The power supply device 1 includes a case 30 made of a conductor having a first housing part 31 that houses the main circuit unit 10 and a second housing part 32 that houses the filter unit 20. As shown in FIGS. 1 and 2, the case 30 is formed integrally with the case body 35 so as to partition the case body 35 having an open surface 34 on one side, and the first housing portion 31 and the second housing portion 32. It has the partition part 36a currently formed, and the cover part 39 which covers the open surface 34. As shown in FIG. The partition wall 36a is formed with a slit portion 37 that allows the first housing portion 31 and the second housing portion 32 to communicate with each other.

  In the first accommodating part 31, the control circuit 13, the transformer 11, and the rectifying circuit 12 are arranged in this order from the side far from the side adjacent to the second accommodating part 32. In the case 30, in addition to the first housing portion 31 and the second housing portion 32, a third housing portion 33 that houses an output stabilizing portion 50 described later is formed. Similar to the second housing portion 32, the third housing portion 33 is partitioned from the first housing portion 31 by the partition wall portion 36 a. Moreover, the 2nd accommodating part 32 and the 3rd accommodating part 33 are partitioned off by the partition part 36b. A slit portion 52 that connects the second storage portion 32 and the third storage portion 33 is formed in the partition wall portion 36b.

  Each of the partition walls 36 a and 36 b is vertically provided on the bottom 38 of the case body 35 and is formed so as to be connected to the side 35 a of the case body 35. Thereby, each accommodating part 31, 32, and 33 is separately enclosed by the partition part 36a, 36b, the case main body 35 (side part 35a, the bottom part 38), and the cover part 39 except the said slit parts 37 and 52, respectively. Will be shielded.

  As shown in FIG. 2, the slit portion 37 is formed from the open surface 34 side toward the opposite side (the bottom portion 38 side of the case main body 35). The slit portion 37 is formed such that the width in the direction orthogonal to the forming direction is slightly narrowed from the open surface 34 side toward the opposite side. The width of the slit portion 37 is sufficient if the first bus bar 41 passes sufficiently. In this example, the width W1 on the open surface 34 side of the slit portion 37 is about 10 mm. The width W1 is not limited to this, and can be appropriately changed in consideration of the shape of the first bus bar 41, the arrangement of the filter substrate 21, and the like. For example, the width W1 can be about 8 mm to about 11 mm.

  The power supply apparatus 1 includes a first bus bar 41 that is electrically connected to the main circuit unit 10 and the filter unit 20 through the slit unit 37 and propagates the voltage rectified in the rectifier circuit 12 to the filter unit 20. . As shown in FIG. 4, the first bus bar 41 is insert-molded into a mold portion 44 made of an insulating material to constitute a bus bar module 40. The first bus bar 41 includes connection terminals 41a and 41b at one end, connection terminals 43a and 43b at the other end, and a connection terminal 43c at a substantially central portion. The connection terminals 41b, 43b, 43c are formed in a pin shape protruding toward the open surface 34, and the connection terminals 41a, 43a are formed in an annular shape.

  The mold part 44 inserts a GND bus bar 46 together with the first bus bar 41. Thus, the bus bar module 40 integrates the first bus bar 41 and the GND bus bar 46. The GND bus bar 46 includes connection terminals 46a and 46b. The connection terminal 46a is formed in a pin shape protruding toward the open surface 34, and the connection terminal 46b is formed in an annular shape. In the bus bar module 40, the first bus bar 41 and the GND bus bar 46 are inserted into the mold part 44 so that the connection terminals 41 a, 41 b, 43 a, 43 b, 43 c, 46 a, 46 b are exposed from the mold part 44. PBT resin, ABS resin, polycarbonate (PC) resin, or the like can be used as an insulating material for forming the mold portion 44.

  The mold portion 44 includes two leg portions 40 a that protrude toward the bottom 38 of the case body 35. The bus bar module 40 is positioned with respect to the case main body 35 by fitting the leg portion 40 a into a positioning hole (not shown) formed in the second housing portion 32. Thereby, as shown in FIG. 3, the mold part 44 is arranged in the second housing part 32, and the mold part 44 is positioned so that a part of one end side of the first bus bar 41 passes through the slit part 37. Thereby, the connection terminal 41 a on the one end side is located in the first housing portion 31. The connection terminal 41 a is connected to the output terminal of the rectifier circuit 12. On the other hand, the other connection terminal 41 b of the first bus bar 41 is located in the second housing portion 32 and connected to the circuit pattern of the filter substrate 21. Thereby, the rectifier circuit 12 and the filter substrate 21 are electrically connected by the first bus bar 41. The connection terminal 46 a is connected to the ground pattern of the filter substrate 21, and the connection terminal 46 b is connected to the case body 35. As a result, the ground pattern of the filter substrate 21 is grounded by the GND bus bar 46.

  As shown in FIGS. 2 to 4, the mold part 44 has a positioning part 45 that contacts the second bus bar 42 described later and positions the second bus bar 42. The positioning portion 45 is made of an insulating material that forms the mold portion 44, and is formed integrally with the mold portion 44. Further, the positioning portion 45 is formed so as to be adjacent to the slit portion 37. The positioning portion 45 protrudes toward the open surface 34, and a V-shaped groove 45a is formed at the end on the protruding side. The bottom of the V-shaped groove 45a is further cut in the direction of the bottom 38 of the case body 35, and the second bus bar 42 is placed on the bottom of the groove 45a. As shown in FIG. 2, the width W <b> 2 of the positioning portion 45 is smaller than the width W <b> 1 of the slit portion 37 at the height position (position in the X direction) of the protruding end portion of the positioning portion 45. When the positioning portion 45 is viewed through the slit portion 37, the left and right ends of the positioning portion 45 are located between the left and right wall surfaces of the slit portion 37.

  As shown in FIG. 1, the power supply device 1 is electrically connected to the main circuit unit 10 and the filter unit 20 via the slit unit 37, and propagates the voltage after noise removal in the filter unit 20 to the control circuit 13. The second bus bar 42 is provided. And in the slit part 37, the 1st bus bar 41 and the 2nd bus bar 42 are located in a line along the direction X (paper surface up-down direction in FIG. 2) in which the slit part 37 is formed. Further, the second bus bar 42 is placed in the groove portion 45a as described above, so that the slit portion 37 is positioned closer to the open surface 34 than the first bus bar 41.

  Each cross-sectional shape of the first bus bar 41 and the second bus bar 42 in the slit portion 37 is rectangular as shown in FIG. And in the slit part 37, the 1st bus bar 41 and the 2nd bus bar 42 are located in a line so that the longitudinal direction in these cross sections may follow the direction X in which the slit part 37 is formed.

  As shown in FIG. 1, the second bus bar 42 is provided across the first housing portion 31 and the second housing portion 32 by being provided via the slit portion 37. As shown in FIG. 2, one end of the second bus bar 42 is located in the second accommodating portion 32, and a connection terminal 42a is formed at the one end. The connection terminal 42 a is connected to the circuit pattern of the filter substrate 21 in the second housing portion 32. On the other hand, as shown in FIG. 1, the other end of the second bus bar 42 is located in the first accommodating portion 31 and extends to the control circuit 13, and a connection terminal 42b is formed at the other end. The connection terminal 42 b is connected to the circuit pattern of the control circuit 13 in the first housing portion 31. As a result, the control circuit 13 and the filter substrate 21 are electrically connected by the second bus bar 42.

Next, how the bus bar module 40 and the filter unit 20 are assembled to the case body 35 will be described. In the power supply device 1, as shown in FIG. 5, the filter substrate 21 includes two fixing portions 22 for fixing to the case body 35. The fixing portion 22 is a through hole formed in the filter substrate 21. The filter part 20 is fixed to the case main body 35 by inserting the screw 23 through the through hole of the fixing part 22 and fastening to the fastening part 32 a having the screw hole provided in the second accommodating part 32. The mold part 44 is arranged in the second housing part 32 as described above, and the filter substrate 21 is fixed to the case main body 35 by the two fixing parts 22 as described above to open the mold part 44. It is assembled so as to cover from the surface 34 side.
Here, in such assembly, after the bus bar module 40 is arranged as described above and the first bus bar 41 is passed through the slit portion 37, the second bus bar 42 is passed from the open surface 34 side to the groove portion 45 a so as to pass through the slit portion 37. It is carried out by mounting and fixing the filter unit 20 as described above.

  The two fixing portions 22 are formed on the filter substrate 21 at positions adjacent to the outer edge of the filter substrate 21 and on a straight line 24 passing through the approximate center of the filter substrate 21. On the other hand, as shown in FIGS. 2 and 4, the mold portion 44 is a protruding portion that protrudes toward the filter substrate 21 at a position that does not overlap with the two fixing portions 22 when viewed from the open surface 34 side. 47. The position where the protrusion 47 is formed is a position where the filter substrate 21 and the mold member 44 overlap when viewed from the open surface 34 side, and is a position sufficiently away from the straight line 24. In this example, the position where the protrusion 47 is formed is a position where the distance d from the straight line 24 is about 16 mm. The distance d corresponds to ¼ or more of the length of the filter substrate 21 in the longitudinal direction (about 63 mm). The protrusion 47 is formed at a position corresponding to a corner of the filter substrate 21 that does not overlap the two fixed portions 22 in a straight line.

  The protruding portion 47 is made of an insulating material that forms the mold portion 44, and is formed integrally with the mold portion 44. The projecting portion 47 has a quadrangular prism shape that is erected vertically toward the filter substrate 21. The height h of the protrusion 47 is defined so that a gap s is formed between the end 47a of the protrusion 47 and the filter substrate 21. In this example, the height h is about 13 mm, and the size of the gap s is about 1 mm.

  As shown in FIG. 1, the third accommodating portion 33 includes an output stabilizing portion 50 having an output circuit 51. As shown in FIG. 3, the connection terminals 43 a and 43 b of the first bus bar 31 in the bus bar module 40 in which the mold part 44 is arranged in the second housing part 32 are positioned in the third housing part 33 through the slit part 52. doing. The connection terminals 43 a and 43 b are connected to the output circuit 51. On the other hand, the connection terminal 43 c at the center of the first bus bar 41 is connected to the filter substrate 21. As a result, the filter substrate 21 and the output circuit 51 are electrically connected.

Next, the effect of the power supply device 1 will be described.
In the power supply device 1, the case main body 35 has a first housing portion 31 and a second housing portion 32 partitioned by a partition wall portion 36, and the main circuit portion 10 and the filter portion 20 are provided in the housing portions 31 and 32. , Each housed individually. The partition wall 36 is formed integrally with the case body 35 and is made of a conductor. Thereby, the leakage magnetic flux from the transformer 11 of the main circuit portion 10 is shielded by the partition wall portion 36, and the leakage magnetic flux is prevented from interlinking with the filter portion 20. As a result, the influence of noise caused by the leakage magnetic flux of the transformer 11 on the output voltage can be reduced.

  Further, in the slit portion 37, the first bus bar 41 and the second bus bar 42 are arranged along the direction X in which the slit portion 37 is formed, so that the first bus bar 41 and the second bus bar 42 are connected to the slit portion 37. In order to arrange in the above, it is sufficient to arrange sequentially from the open surface 34 side as described above. Therefore, the width W1 on the open surface 34 side of the slit portion 37 is a width through which the first bus bar 41 passes sufficiently as described above, and is small. Thereby, the leakage of the magnetic flux from the slit part 37 can be suppressed, and a sufficient shielding effect can be ensured.

  In addition to the above, in the slit portion 37, the first bus bar 41 and the second bus bar 42 are arranged so that the longitudinal directions of the cross sections thereof are along the direction X in which the slit portion 37 is formed. The width direction of the slit portion 37 is the short direction of 41 and the second bus bar 42. Therefore, the width of the slit portion 37 can be further reduced, and the leakage of magnetic flux from the slit portion 37 can be further suppressed to further ensure the shielding effect.

  Further, since the partition wall 36a is formed integrally with the case main body 35, it is not necessary to assemble a shielding plate as a separate member for shielding the leakage magnetic flux. Therefore, the productivity of the power supply device 1 can be improved and the cost can be reduced.

  Furthermore, in the power supply device 1, the second bus bar 42 is positioned by the positioning portion 45 that comes into contact with the second bus bar 42, so that the second bus bar 42 is easily positioned. Thereby, the mounting workability of the second bus bar 42 is good, and the productivity is improved. The second bus bar 42 is positioned on the open surface 34 side of the first bus bar 41 in the slit portion 37, and the second bus bar 42 is positioned in the groove 45a of the positioning portion 45. Since it only has to be placed, the workability of attaching the second bus bar 42 is further improved, and the productivity is improved.

  Moreover, since the groove part 45a in which the 2nd bus bar 42 is mounted is V-shaped, the 2nd bus bar 42 will be positioned by the V-shaped bottom part in the groove part 45a. Therefore, the second bus bar 42 placed on the positioning part 45 is prevented from dropping off from the positioning part 45 or from being displaced, and the mounting workability of the second bus bar 42 is further improved and the productivity is improved. Will improve.

  Further, in the power supply device 1, the positioning portion 45 is disposed so as to be adjacent to the slit portion 37, so that the second bus bar 42 can be more reliably passed through the slit portion 37 while being placed on the positioning portion 45. it can. Thereby, the mounting workability of the second bus bar 42 is further improved, and the productivity is improved.

  In addition, since there are only two fixing portions 22 for fixing the filter substrate 21 to the case main body 35, space saving is achieved, and the limited space in the second housing portion 32 is made more effective. Available. Since the filter substrate 21 is fixed to the case main body 35 with the two fixing portions 22 in this way, when the filter substrate 21 is mounted, the straight line 24 passing through the two fixing portions 22 is used as the rotation axis. In some cases, the filter substrate 21 may be inclined in the rotating direction Y (see the filter substrate 21 indicated by a broken line in FIG. 6). Even in such a case, if the filter substrate 21 is tilted to a predetermined angle or more in the Y direction, a part of the filter substrate 21 comes into contact with the tip of the protruding portion 47, and the filter substrate 21 is tilted further. It is prevented. Thereby, when the filter substrate 21 is attached, the filter substrate 21 is prevented from being excessively tilted or misaligned, and the attachment workability of the filter substrate 21 is improved and the productivity is improved.

  In addition, since the gap s is formed between the tip of the protruding portion 47 and the filter substrate 21, the protruding portion 47 is prevented from interfering with the filter substrate 21 when the filter substrate 21 is fixed.

Further, as described above, the projecting portion 47 is formed at a position away from the straight line 24 by the distance d, and thus is sufficiently separated from the straight line 24. As a result, when the filter substrate 21 is tilted as described above, the tip of the protruding portion 47 can easily come into contact with the filter substrate 21, and the above-described effects of the protruding portion 47 can be sufficiently achieved.
In this example, the distance d is sufficiently large. However, even if the distance d is small, the protruding portion 47 is a corner portion of the filter substrate 21 that does not overlap the two fixed portions 22 in a straight line. Since it is formed at the position, the above-described effects can be obtained.

  In addition, the second bus bar 42 connects the filter unit 20 accommodated in the second accommodation unit 32 and the control circuit 13 located farthest from the filter unit 20 in the first accommodation unit 32. As with the first bus bar 41 and the GND bus bar 43, if the second bus bar 42 is insert-molded into the mold portion 44 to form a bus bar module, the bus bar module becomes very long in the longitudinal direction, and the handleability is reduced. In addition, the mounting workability is deteriorated. However, in this example, since the second bus bar 42 is separate from the bus bar module 40, the bus bar module 40 does not become excessively long in the longitudinal direction, its handling property does not deteriorate, and the mounting workability is good. .

  As described above, according to this example, it is possible to provide a power supply device that can reduce the influence of noise caused by leakage magnetic flux, reduce costs, and improve productivity.

(Example 2)
In this example, as shown in FIG. 7, in place of the positioning portion 45 in the power supply device 1 according to the first embodiment, the power supply device 100 including a positioning portion 450 having a width W2 larger than the width W3 of the slit portion 37. It is an example.

  In this example, the width of the slit portion 37 is about 10 mm on the open surface 34 side. On the other hand, at the height position (position in the X direction) of the protruding end portion of the positioning portion 450, the width W2 of the positioning portion 450 is about 10 mm, which is the same as the width of the slit portion 37 on the open surface 34 side. . However, since the width of the slit portion 37 gradually decreases from the open surface 34 side toward the bottom portion 38 side, the width W2 of the positioning portion 450 is higher than the width W3 of the slit portion 37 at the height position of the protruding end portion of the positioning portion 450. Is also big. That is, as shown in FIG. 7, when the positioning portion 450 is viewed through the slit portion 37, the left and right ends of the positioning portion 450 are located outside the left and right wall surfaces of the slit portion 37, There is no gap between the left and right ends of the positioning portion 450.

  In this example, the width W2 of the positioning portion 450 is larger than the width W3 of the slit portion 37 at the height position of the protrusion end portion of the positioning portion 450, but the width W2 may be the same size as the width W3. . Also in this case, when the positioning part 450 is viewed through the slit part 37, no gap can be formed between the left and right wall surfaces of the slit part 37 and the left and right ends of the positioning part 450. Other components in this example are the same as those in the first embodiment. Of the reference numerals used in the drawings relating to this example, the same reference numerals as those used in the first embodiment represent the same components as in the first embodiment unless otherwise specified.

  According to the power supply device 100 of the present example, as described above, there is no gap between the left and right wall surfaces of the slit portion 37 and the left and right ends of the positioning portion 450, so the second bus bar 42 is mounted on the positioning portion 450. When the second bus bar 42 is passed through the slit portion 37, the second bus bar 42 is reliably placed on the positioning portion 450 without being displaced from the positioning portion 450. Moreover, according to the power supply apparatus 100 of this example, there exists an effect similar to the said power supply apparatus 1. FIG.

  Further, in the power supply device 1 according to the first embodiment, as illustrated in FIG. 2, the left and right ends of the positioning portion 45 are positioned between the left and right wall surfaces of the slit portion 37. Therefore, when the second bus bar 42 is placed in the groove 45a, the second bus bar 42 is located between the left wall surface of the slit portion 37 and the left end of the positioning portion 45 or between the right wall surface of the slit portion 37 and the positioning portion 45. It is also possible that a situation may occur in which the right end is accidentally entered. However, since the positioning unit 450 in the power supply device 100 of this example has no gap between the left and right wall surfaces of the slit unit 37 and the left and right ends of the positioning unit 450 as described above, such a situation occurs. It is prevented, and the mounting workability is further improved, and the productivity is further improved.

  In addition to the first embodiment and the second embodiment, the power supply device can employ various modes. For example, in the slit part 37, the 2nd bus bar 42 can also be arrange | positioned with respect to the 1st bus bar 41 on the opposite side to the open surface 34. FIG.

DESCRIPTION OF SYMBOLS 1,100 Power supply device 10 Main circuit part 13 Control circuit 20 Filter part 35 Case main body 36a, 36b Partition part 37 Slit part 41 1st bus bar 42 2nd bus bar 45, 450 Positioning part

Claims (7)

A main circuit section having a transformer (11), a rectifier circuit (12) for rectifying the electric power converted by the transformer (11), and a control circuit (13) for controlling the electric power conversion by the transformer (11) ( 10) and
A filter unit (20) including a filter substrate (21) for removing noise from the power rectified by the rectifier circuit (12);
A case (30) made of a conductor having a first housing part (31) for housing the main circuit part (10) and a second housing part (32) for housing the filter part (20), The case body (35) having an open surface (34), the first housing part (31), and the second housing part (32) are formed integrally with the case body (35) so as to partition the case body (35). It has a partition part (36a) and the cover part (39) which covers the said open surface (34), and said partition part (36a) has said 1st accommodating part (31) and said 2nd accommodating part (32). A case (30) in which a slit portion (37) communicating with the
The voltage after being rectified in the rectifier circuit (12) is electrically connected to the main circuit portion (10) and the filter portion (20) via the slit portion (37). First bus bar (41) to be propagated to
The voltage after being electrically connected to the main circuit part (10) and the filter part (20) through the slit part (37) and noise-removed in the filter part (20) is supplied to the control circuit ( A second bus bar (42) to be propagated to 13);
With
The slit portion (37) is formed from the open surface (34) side toward the opposite side,
The power supply device (1, 100), wherein the first bus bar (41) and the second bus bar (42) are arranged along a direction in which the slit portion (37) is formed.   The power supply device (1, 100) according to claim 1, wherein the first bus bar (41) is insert-molded in a mold part (44) made of an insulating material to constitute a bus bar module (40), and The power supply apparatus according to claim 1, wherein the mold part (44) has positioning parts (45, 450) for contacting the second bus bar (42) and positioning the second bus bar (42). The power supply device (1, 100) according to claim 2 , wherein the positioning portion (45, 450) is disposed adjacent to the slit portion (37) . 100). The power supply device (100) according to claim 3, wherein a width (W2) of the positioning portion (450) is larger than a width (W3) of the slit portion (37 ). In the power supply device (1, 100) according to any one of claims 2 to 4,
The mold part (44) of the bus bar module (40) is disposed in the second housing part (42), and the filter substrate (21) is connected to the case body (35) by two fixing parts ( 22), and the filter substrate (21) is disposed so as to cover the mold part (44) from the open surface (34) side,
The mold part (44) protrudes toward the filter substrate (21) at a position that does not overlap with the two fixed parts (22) when viewed from the open surface (34) side. (47) The power supply device (1, 100) characterized by having . The power supply device ( 1, 100) according to any one of claims 1 to 5, wherein the second bus bar (42) is more open at the slit portion (37) than the first bus bar (41). (34) A power supply device ( 1, 100) characterized by being located on the side . The power supply device (1, 100) according to claim 6 , wherein the positioning portion (45, 450) includes a V-shaped groove (45a), and the second bus bar (42) is placed in the groove (45a). A power supply device (1, 100) characterized by being installed .

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