Power conversion device and electric power steering device using same
A technology of power conversion device and power conversion circuit, which is applied in the direction of power steering mechanism, electric steering mechanism, output power conversion device, etc., and can solve problems such as insufficient heat dissipation of components
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no. 1 approach
[0058] refer to image 3 - Fig. 6 describes the first embodiment. image 3 It is a plan view of the substrate 20 on which the circuit of the ECU 101 is mounted, and it is the same as that of Patent Document 1. image 3 Wait for correspondence. The following instructions for installation configuration basically start with image 3 The viewing direction, that is, the top view is used as a reference for description.
[0059] The substrate 20 is formed of an insulating material such as epoxy glass or ceramics. Wiring patterns such as the power supply pattern 21 are formed on the surface layer of the substrate 20 from a conductive substance such as copper. image 3 The illustration of the wiring patterns other than the power supply pattern 21 is omitted in FIG.
[0060] In this embodiment, the arrangement of the post-relay capacitor 55 , the arrangement of the switching elements 61 - 64 in the power unit 60 , and the arrangement of the microcomputer 71 and the custom IC 72 in ...
no. 2 approach
[0093] Figure 7 The ECU 102 of the second embodiment shown is different from the first embodiment in that two capacitors 501 , 502 are connected in parallel in front of the power relay 45 . In the y direction, the center position C of the two capacitors 501, 502 C1 、C C2 are relative to the center position of the inductor 40 C L Located on the side of the second terminal hole 24 .
[0094] In addition, the second electrode terminals 54 of the capacitors 501 and 502 are both arranged on the side close to the second terminal hole 24 in the y direction.
[0095] The second embodiment has the same effect as that of the first embodiment.
[0096] As a modified example of the second embodiment, the filter circuit of the input unit may be composed of three or more pre-relay capacitors connected in parallel between the power supply pattern 21 and the ground pattern 22 . In the configuration in which a plurality of pre-relay capacitors are connected in parallel, it is preferred t...
no. 3 approach
[0098] Figure 8 The ECU 103 of the third embodiment shown differs from the first embodiment in the positional relationship between the inductor 40 and the first terminal hole 23 . In the x direction, the range Wt of the input end 43 of the inductor 40 is in a state in which the range Wh that does not completely include the first terminal hole 23 partially overlaps. In addition, it is preferable to set the distance D1 of the input end 43 and the 1st terminal hole 23 as short as possible similarly to 1st Embodiment.
[0099] The third embodiment has the same effects as the effects (1), (3), and (4) of the first embodiment.
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