JP6888017B2 - Pwmコンデンサの制御 - Google Patents
Pwmコンデンサの制御 Download PDFInfo
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Description
図4は、PWMコンデンサの制御の混合信号実装の実施形態の例における図を示す。この実装は、変調器404と通信中であるコントローラインタフェース402と通信中であるコントローラ400を含む。変調器404は、ゼロ電圧スイッチング(ZVS)制御のためにパルス整形回路406と通信する。パルス整形回路406は、変調器404と通信するパワーステージ408と通信する。これらのブロックについては、以下でさらに説明する。
図9は、PWMコンデンサに対するコントローラのデジタル実装の実施形態の例における図を示す。この実装は、コントローラ902と、ゼロ交差検出ステージ904と、パワーステージ906とを含む。コントローラ902は、ゼロ交差検出ステージ904と通信し、ゼロ交差検出ステージ904は、ゼロ交差検出器910内の比較器に対する電圧信号を生成する電流センサ908を含む。ゼロ交差検出器910は、電流がゼロを横切る時(例えば、極性が変化すること)を示すゼロ交差信号をコントローラ902に提供する。ゼロ交差検出ステージ904は、パワーステージ906に結合される。パワーステージ906は、ゲートドライバ914の入力信号に対する信号絶縁回路912を含む。コントローラ902は、ゲートドライバ914に対する入力信号を供給する。ゲートドライバ914は、コンデンサC1と並列に接続されたスイッチング素子M1およびM2を駆動する。電流センサ908は、電流検出信号をゼロ交差検出器910に供給する。ゼロ交差検出器910の出力は、トランジスタM1およびM2に対する駆動信号を生成するコントローラ902に供給される。コントローラ902は、1つまたは複数のプロセッサまたはマイクロコントローラとして実装することができる。いくつかの実装形態では、コントローラ902は、ASICまたはFPGAコントローラとして実装することができる。
図12は、スイッチング素子M1およびM2と、保護/診断機能とによって制御される等価キャパシタンスを有するPWM制御コンデンサC1の混合信号実装1200の例を示す。いくつかの実装では、コントローラ1202、変調器1204、およびパワーステージ1206は、上記の実施形態といくつかの共通点を有することができる。パワーステージ1206は、コンデンサC1と、スイッチング素子M1およびM2と、コンデンサC1を流れる電流を検出する電流センサ1208とを含む。電流センサ1208は、保護/診断回路1210、ピーク検出器1212、およびゼロ交差検出器1214のうちの1つ以上に提供することができるコンデンサ電流情報CS1、CS2を提供する。実装は、電流センサ情報CS1およびCS2を受信する回路のすべてを、または任意の組み合わせを含むことができ、また全く含まなくてもよい。
いくつかの実装では、PWM制御コンデンサを備えるシステムは、そのスイッチ(例えば、MOSFET)のゼロ電圧スイッチングのための強化回路を含む。いくつかの実装では、自動ZVS実装は、PWM制御されたコンデンサに関連する例えばMOSFET等のスイッチング素子の故障を低減または排除するために、比較的著しい信号過渡の存在下でZVSを提供する。いくつかの実装では、ボディダイオード導通センサは、以下により詳細に説明するように、スイッチング素子におけるボディダイオードの導通を検出し、スイッチング素子制御信号に影響を与える。
Claims (20)
- コンデンサと、
第1トランジスタソース端子と、第1トランジスタドレイン端子と、第1トランジスタゲート端子とを備え、前記第1トランジスタドレイン端子は、前記コンデンサの第1端子に電気的に接続される、第1トランジスタと、
第2トランジスタソース端子と、第2トランジスタドレイン端子と、第2トランジスタゲート端子とを備え、前記第2トランジスタドレイン端子は、前記コンデンサの第2端子に電気的に接続され、前記第2トランジスタソース端子は、前記第1トランジスタソース端子に電気的に接続される、第2トランジスタと、
前記第1トランジスタゲート端子と前記第2トランジスタゲート端子とに結合された制御回路と、
を備える可変容量素子において、
前記制御回路は、
第1の時間に入力電流の第1ゼロ交差を検出するステップと、
前記第1の時間から第1遅延期間の後に、前記第1トランジスタをオフにするステップであって、前記第1遅延期間の長さは入力値によって制御されるステップと、
前記第1の時間の後の第2の時間に、前記入力電流の第2ゼロ交差を検出するステップと、
前記第1トランジスタをオフに切り換えてから前記第2ゼロ交差を検出するまでの経過時間を測定するステップと、
前記経過時間に基づいてカウンタを設定するステップと、
前記カウンタに基づく第2遅延期間の後に、前記第1トランジスタをオンに切り換えるステップと、
を含む動作を行うことで、前記コンデンサの実効キャパシタンスを調整するように構成されることを特徴とする、可変容量素子。 - 前記動作はさらに、
前記第2の時間から前記第1遅延期間の後に、前記第2トランジスタをオフに切り換えるステップと、
前記第2の時間の後の第3の時間に、前記入力電流の第3ゼロ交差を検出するステップと、
前記第2トランジスタをオフに切り換えてから前記第3ゼロ交差を検出するまでの第2経過時間を測定するステップと、
前記第2経過時間に基づいて第2カウンタを設定するステップと、
前記第2カウンタに基づく第3遅延期間の後に、前記第2トランジスタをオンに切り換えるステップと、
を含む、請求項1に記載の可変容量素子。 - 前記コンデンサの前記実効キャパシタンスは前記入力値によって制御される、請求項1に記載の可変容量素子。
- 前記経過時間に基づいて前記カウンタを設定するステップは、測定された前記経過時間と所定の遅延期間とを合わせた時間に前記カウンタを設定するステップを含む、請求項1に記載の可変容量素子。
- 前記所定の遅延期間は800ns未満である、請求項5に記載の可変容量素子。
- 前記第1トランジスタおよび前記第2トランジスタは、シリコンMOSFETトランジスタ、シリコンカーバイドMOSFETトランジスタ、または窒化ガリウムMOSFETトランジスタからなるグループから選択される、請求項1に記載の可変容量素子。
- 請求項1に記載の可変容量素子を備える、高電圧インピーダンス整合システム。
- 請求項1に記載の可変容量素子に電気的に結合された誘導コイルを備える、高出力無線エネルギー伝送システム。
- コンデンサと、
第1トランジスタソース端子と、第1トランジスタドレイン端子と、第1トランジスタゲート端子とを備え、前記第1トランジスタドレイン端子は、前記コンデンサの第1端子に電気的に接続される、第1トランジスタと、
第2トランジスタソース端子と、第2トランジスタドレイン端子と、第2トランジスタゲート端子とを備え、前記第2トランジスタドレイン端子は前記コンデンサの第2端子に電気的に接続され、前記第2トランジスタソース端子は前記第1トランジスタソース端子に電気的に接続される、第2トランジスタと、
前記第1トランジスタゲート端子と前記第2トランジスタゲート端子とに結合された制御回路と、
を備える可変容量素子において、
前記制御回路は、
第1の時間に入力電流のゼロ交差を検出するステップと、
前記第1トランジスタをオフに切り換えるステップと、
入力値に基づいて、前記コンデンサの両端の電圧がゼロの時に前記第1トランジスタをオンに切り換えるための第1遅延期間を推定するステップと、
前記第1の時間から前記第1遅延期間の後に、前記第1トランジスタをオンに切り換えるステップと、
第2の時間に前記入力電流のゼロ交差を検出するステップと、
前記第2トランジスタをオフに切り換えるステップと、
前記入力値に基づいて、前記コンデンサの両端の電圧がゼロの時に前記第2トランジスタをオンに切り換えるための第2遅延期間を推定するステップと、
前記第2の時間から前記第2遅延期間の後に、前記第2トランジスタをオンに切り換えるステップと、
を含む動作を行うことで、前記コンデンサの実効キャパシタンスを調整するように構成されることを特徴とする、可変容量素子。 - 前記コンデンサの前記実効キャパシタンスは、前記入力値によって制御される、請求項10に記載の可変容量素子。
- 前記第1の時間から前記第1遅延期間の後に、前記第1トランジスタをオンに切り換えるステップは、前記第1の時間から前記第1遅延期間の後に一定の遅延期間に続いて前記第1トランジスタをオンに切り換えるステップを含む、請求項10に記載の可変容量素子。
- 請求項10に記載の可変容量素子を備える、高電圧インピーダンス整合システム。
- 請求項10に記載の可変容量素子に電気的に結合された誘導コイルを備える、高出力無線エネルギー伝送システム。
- コンデンサと、
第1トランジスタソース端子と、第1トランジスタドレイン端子と、第1トランジスタゲート端子とを備え、前記第1トランジスタドレイン端子は、前記コンデンサの第1端子に電気的に接続される、第1トランジスタと、
第2トランジスタソース端子と、第2トランジスタドレイン端子と、第2トランジスタゲート端子とを備え、前記第2トランジスタドレイン端子は前記コンデンサの第2端子に電気的に接続され、前記第2トランジスタソース端子は前記第1トランジスタソース端子に電気的に接続される、第2トランジスタと、
前記第1トランジスタゲート端子と前記第2トランジスタゲート端子とに結合された制御回路と、
を備える可変容量素子において、
前記制御回路は、
第1の時間に前記第1トランジスタをオフに切り換えるステップと、
前記第1トランジスタに関連する第1ダイオードを流れる電流を検出した後に前記第1トランジスタをオンに切り換えるステップと、
第2の時間に前記第2トランジスタをオフに切り換えるステップと、
前記第2トランジスタに関連する第2ダイオードを流れる電流を検出した後に、前記第2トランジスタをオンに切り換えるステップと、
を含む動作を行うことで、前記コンデンサの実効キャパシタンスを調整するように構成されることを特徴とする、可変容量素子。 - 前記第1ダイオードは前記第1トランジスタと電気的に並列に接続され、前記第2ダイオードは前記第2トランジスタと電気的に並列に接続される、請求項15に記載の可変容量素子。
- 前記第1ダイオードは前記第1トランジスタのボディダイオードであり、前記第2ダイオードは前記第2トランジスタのボディダイオードである、請求項15に記載の可変容量素子。
- 前記第1トランジスタと前記第2トランジスタとに電気的に接続されたボディダイオード導通センサをさらに含む、請求項15に記載の可変容量素子。
- 前記ボディダイオード導通センサは前記制御回路に結合されて、前記第1ダイオードを介し、かつ前記第2ダイオードを介する、前記ボディダイオードの導通の開始を示す信号を提供する、請求項18に記載の可変容量素子。
- 前記ボディダイオード導通センサは、前記第1トランジスタと前記第2トランジスタとの間に電気的に接続された検出抵抗器を含む、請求項18に記載の可変容量素子。
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JP6888017B2 (ja) | 2016-02-08 | 2021-06-16 | ワイトリシティ コーポレーションWitricity Corporation | Pwmコンデンサの制御 |
KR101957575B1 (ko) * | 2017-06-23 | 2019-03-13 | 인투코어테크놀로지 주식회사 | 전원 공급 장치 및 부하에 전원을 공급하는 방법 |
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- 2017-02-08 CN CN202111244652.6A patent/CN114123540B/zh active Active
- 2017-02-08 WO PCT/US2017/017054 patent/WO2017139406A1/en active Application Filing
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CA3012697A1 (en) | 2017-08-17 |
US20210129690A1 (en) | 2021-05-06 |
US10063104B2 (en) | 2018-08-28 |
CN114123540A (zh) | 2022-03-01 |
EP3203634A1 (en) | 2017-08-09 |
CN109075614A (zh) | 2018-12-21 |
JP7089619B2 (ja) | 2022-06-22 |
JP2021145133A (ja) | 2021-09-24 |
KR102612384B1 (ko) | 2023-12-12 |
US20180323654A1 (en) | 2018-11-08 |
US20170229917A1 (en) | 2017-08-10 |
CN109075614B (zh) | 2021-11-02 |
AU2017218337A1 (en) | 2018-08-09 |
US10913368B2 (en) | 2021-02-09 |
KR20180104176A (ko) | 2018-09-19 |
JP2019512162A (ja) | 2019-05-09 |
US11807115B2 (en) | 2023-11-07 |
CN114123540B (zh) | 2024-08-20 |
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