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集磁コアのエアギャップに磁束検出素子を配置し集磁コアを貫通する１次導体の電流値を測定する電流センサにおいて、集磁コアに磁束発生用のコイルを巻装し、制御装置から制御可能な電流源を前記コイルに接続し、１次導体への通電停止時に、制御装置を介して前記コイルに検査電流を流し、この時に前記磁束検出素子により検出された電流値に基づいて故障を判定することを特徴とする電流センサ。
In a current sensor that measures the current value of the primary conductor that passes through the magnetic flux collecting core by arranging a magnetic flux detection element in the air gap of the magnetic flux collecting core, a coil for generating magnetic flux is wound around the magnetic flux collecting core and controlled from the controller. A possible current source is connected to the coil, and when energization to the primary conductor is stopped, an inspection current is supplied to the coil via the control device, and a failure is detected based on the current value detected by the magnetic flux detection element at this time. A current sensor characterized by determining.
前記１次導体は車両用のモータの駆動電流を通電する導線であって、エンジン始動前又はアイドルストップ時に故障の判定を行うことを特徴とする請求項１に記載の電流センサ。
2. The current sensor according to claim 1, wherein the primary conductor is a conducting wire for passing a driving current of a motor for a vehicle, and performs a failure determination before starting the engine or at an idle stop.
前記モータと該モータへ電力供給するバッテリとの間に設けられた開閉器が開放状態の時に故障の判定を行うことを特徴とする請求項１に記載の電流センサ。
The current sensor according to claim 1, wherein a failure is determined when a switch provided between the motor and a battery that supplies power to the motor is in an open state.
１次導体近傍に磁束検出素子を配置して１次導体の電流値を測定する電流センサにおいて、１次導体に監視用のコイルを巻装し、前記１次導体の電流の変化を監視用のコイルで検出した際に、磁束検出素子の検出電流に変化がない場合に故障と判定することを特徴とする電流センサ。
In a current sensor for measuring a current value of a primary conductor by arranging a magnetic flux detection element in the vicinity of the primary conductor, a monitoring coil is wound around the primary conductor, and a change in the current of the primary conductor is monitored. A current sensor characterized in that a failure is determined when there is no change in the detected current of the magnetic flux detection element when detected by a coil.
集磁コアのエアギャップに磁束検出素子を配置し集磁コアを貫通する１次導体の電流値を測定する電流センサにおいて、集磁コアに監視用のコイルを巻装し、前記１次導体の電流の変化を監視用のコイルで検出した際に、磁束検出素子の検出電流に変化がない場合に故障と判定することを特徴とする電流センサ。
In a current sensor for measuring a current value of a primary conductor passing through a magnetic flux collecting element by arranging a magnetic flux detection element in an air gap of the magnetic flux collecting core, a monitoring coil is wound around the magnetic flux collecting core, A current sensor, wherein when a change in current is detected by a monitoring coil, a failure is determined when there is no change in the detected current of the magnetic flux detection element.
監視電流の変化量と磁束検出素子による電流変化量の差が所定値以上の時に故障と判定することを特徴とする請求項４または請求項５に記載の電流センサ。
6. The current sensor according to claim 4, wherein a failure is determined when a difference between a change amount of the monitored current and a current change amount by the magnetic flux detection element is equal to or greater than a predetermined value.
１次導体に監視用のコイルを巻装し、前記１次導体の電流の変化を監視用のコイルで検出した際に、磁束検出素子の検出電流に変化がない場合に故障と判定することを特徴とする請求項１記載の電流センサ。
When a monitoring coil is wound around the primary conductor and a change in the current of the primary conductor is detected by the monitoring coil, it is determined that there is a failure when the detected current of the magnetic flux detection element does not change. The current sensor according to claim 1.
前記集磁コアに監視用のコイルを巻装し、前記１次導体の電流の変化を監視用のコイルで検出した際に、磁束検出素子の検出電流に変化がない場合に故障と判定することを特徴とする請求項１記載の電流センサ。
When a monitoring coil is wound around the magnetic collecting core, and a change in the current of the primary conductor is detected by the monitoring coil, it is determined that there is a failure when the detected current of the magnetic flux detection element does not change. The current sensor according to claim 1.
１次導体の近傍に磁束検出素子を配置して前記１次導体の電流値を測定する電流センサにおいて、前記１次導体に監視用のコイルを巻装し、前記１次導体の電流の変化が前記監視用のコイルで検出されずに前記磁束検出素子の検出電流に変化がある場合に故障と判定することを特徴とする電流センサ。In a current sensor for measuring a current value of the primary conductor by arranging a magnetic flux detection element in the vicinity of the primary conductor, a monitoring coil is wound around the primary conductor, and a change in the current of the primary conductor is detected. A current sensor characterized in that a failure is determined when there is a change in the detected current of the magnetic flux detecting element without being detected by the monitoring coil.集磁コアのエアギャップに磁束検出素子を配置して前記集磁コアを貫通する前記１次導体の電流値を測定する電流センサにおいて、前記集磁コアに監視用のコイルを巻装し、前記１次導体の電流の変化が前記監視用のコイルで検出されずに前記磁束検出素子の検出電流に変化がある場合に故障と判定することを特徴とする電流センサ。In a current sensor for measuring a current value of the primary conductor penetrating the magnetic flux collecting core by disposing a magnetic flux detecting element in an air gap of the magnetic flux collecting core, a monitoring coil is wound around the magnetic flux collecting core, A current sensor characterized in that a failure is determined when a change in the detected current of the magnetic flux detecting element is detected without a change in the current of the primary conductor being detected by the monitoring coil.