JP2019520781A - 接地キャパシタ選定装置及び方法 - Google Patents
接地キャパシタ選定装置及び方法 Download PDFInfo
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- 239000003990 capacitor Substances 0.000 title claims abstract description 133
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000012790 confirmation Methods 0.000 claims abstract description 33
- 230000003071 parasitic effect Effects 0.000 claims description 10
- 238000010586 diagram Methods 0.000 description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000003252 repetitive effect Effects 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- QELJHCBNGDEXLD-UHFFFAOYSA-N nickel zinc Chemical compound [Ni].[Zn] QELJHCBNGDEXLD-UHFFFAOYSA-N 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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Abstract
Description
ここで、λeは、回路基板内における波長であり、aは定数であり、Lは基準距離である。
さらに、前記計算モジュール400は、前記波長を範囲形態として計算し得る。即ち、前記計算モジュール400は、基準距離を用いて回路基板における波長範囲を計算し得る。
この場合、前記計算モジュール400は、回路基板における波長範囲として20L(ここで、Lは、基準距離である。)以上と計算し得る。この際、回路基板における全ての地点からシャーシ(接地)までの電気的長さ(electrical length)は、λe/20以下になるように設定されたと言える。
即ち、前記計算モジュール400は、回路基板における波長が2mであると計算することができる。
λe = λ/√εr 〔数式3〕
ここで、λは、空気中における波長であり、λeは、回路基板内における波長であり、εrは、回路基板誘電体の誘電定数である。
λ = 20L/√εr 〔数式4〕
Lは、基準距離であって、算出モジュール300によって算出でき、εrは、回路基板の誘電定数として予め分かる値であることから、前記計算モジュール400は、前記数式4を用いて、空気中における波長λを計算することができる。
λ ≧ 20L/√εr
仮に、前述の実施例のように基準距離Lが0.1mとして計算され、εrが4である場合を仮定すれば、空気中における波長範囲は、次のように算出できる。
λ=4m
即ち、前記計算モジュール400は、空気中における波長が4mという二次中間結果を導出することができる。または、前記計算モジュール400は、空気中における波長が4m以上になるべきであるという結果を導出することもできる。
ここで、fは、基準周波数を意味し、cは、光の速度を意味し、λは、空気中における波長を意味する。
即ち、前記計算モジュール400は、基準周波数を75MHzとして計算できる。
f≦c/(20L/√εr)
ここで、fは、基準周波数であり、cは、光の速度であり、Lは、基準距離であり、εrは、回路基板誘電体の誘電定数である。
10 接地キャパシタ
20 回路基板
30 BMS
40 ボルト
50 コネクター端子
100 確認モジュール
200 選定モジュール
300 算出モジュール
400 計算モジュール
500 選択モジュール
600 保存モジュール
Claims (13)
- バッテリーパックに含まれた回路基板の接地と車両のシャーシとの間に接続する接地キャパシタを選定する装置であって、
前記回路基板上で接地位置を確認する確認モジュールと、
前記確認モジュールによって確認された接地位置に基づき、前記回路基板上で基準位置を選定する選定モジュールと、
前記選定モジュールによって選定された基準位置から最も近い接地位置との距離を基準距離として算出する算出モジュールと、
前記算出モジュールによって算出された前記基準距離を用いて、基準周波数を計算する計算モジュールと、
前記計算モジュールによって計算された基準周波数に基づき、推薦キャパシタを選択する選択モジュールと、を含むことを特徴とする、接地キャパシタ選定装置。 - 前記回路基板は、前記車両のシャーシとボルトによって締結され、
前記接地キャパシタは、一端が前記ボルトに接続し、他端が前記回路基板の接地に接続することを特徴とする、請求項1に記載の接地キャパシタ選定装置。 - 前記確認モジュールは、前記接地位置として、前記回路基板に備えられたコネクター端子及び前記接地キャパシタの位置を確認することを特徴とする、請求項1に記載の接地キャパシタ選定装置。
- 前記選定モジュールは、前記接地位置各々を中心にして半径が同じ円を形成し、前記形成された円の外部に位置し、前記回路基板上に存在する部分における少なくとも一部を前記基準位置として選定することを特徴とする、請求項1に記載の接地キャパシタ選定装置。
- 前記選定モジュールは、二つの接地位置の中央点で各接地位置までの距離を計算し、計算された距離のうち最も短い最小距離を選別し、選別された最小距離が最も長い接地位置対を把握し、把握された接地位置対の中央点で把握された接地位置対までの距離を前記半径とすることを特徴とする、請求項4に記載の接地キャパシタ選定装置。
- 前記選定モジュールは、前記基準位置を領域形態として選定し、
前記算出モジュールは、前記領域の中心点から最も近い接地位置との距離を前記基準距離として算出することを特徴とする、請求項1に記載の接地キャパシタ選定装置。 - 前記計算モジュールが、前記基準距離を用いて、前記回路基板における波長及び空気中における波長を順次計算し、計算された波長に基づいて前記基準周波数を計算することを特徴とする、請求項1に記載の接地キャパシタ選定装置。
- 前記選択モジュールが、前記基準周波数以下の共振周波数を有するキャパシタを前記推薦キャパシタとして選択することを特徴とする、請求項1に記載の接地キャパシタ選定装置。
- 前記選択モジュールは、前記基準周波数以下の共振周波数を有するキャパシタのうち寄生抵抗が最も低いキャパシタを前記推薦キャパシタとして選択することを特徴とする、請求項8に記載の接地キャパシタ選定装置。
- 前記確認モジュールは、前記接地位置を使用者から入力を受ける入力ユニットを備えることを特徴とする、請求項1に記載の接地キャパシタ選定装置。
- 前記確認モジュールは、前記回路基板を撮影した画像イメージから前記接地位置を確認することを特徴とする、請求項1に記載の接地キャパシタ選定装置。
- 複数種類のキャパシタに関わる共振周波数情報を保存する保存モジュールをさらに含むことを特徴とする、請求項1に記載の接地キャパシタ選定装置。
- バッテリーパックに含まれた回路基板の接地と車両のシャーシとの間に接続した接地キャパシタを選定する方法であって、
前記回路基板上で接地位置を確認する確認段階と、
前記確認段階で確認された接地位置に基づき、前記回路基板上で基準位置を選定する選定段階と、
前記選定段階で選定された基準位置から最も近い接地位置との距離を基準距離として算出する算出段階と、
前記算出段階で算出された前記基準距離を用いて、基準周波数を計算する計算段階と、
前記計算段階で計算された基準周波数に基づき、推薦キャパシタを選択する選択段階と、を含むことを特徴とする、接地キャパシタの選定方法。
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