JP2006262586A - Power supply system and control method therefor - Google Patents

Power supply system and control method therefor Download PDF

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JP2006262586A
JP2006262586A JP2005074873A JP2005074873A JP2006262586A JP 2006262586 A JP2006262586 A JP 2006262586A JP 2005074873 A JP2005074873 A JP 2005074873A JP 2005074873 A JP2005074873 A JP 2005074873A JP 2006262586 A JP2006262586 A JP 2006262586A
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capacitor
power supply
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voltage
current
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JP4635664B2 (en
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Masaya Amano
正弥 天野
Keiji Kaida
啓司 海田
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Toyota Motor Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To appropriately determine precharge of a capacitor, regardless of the failure in a sensor. <P>SOLUTION: In a power supply system, when the start of the system is instructed, relays SMR2, SMR3 are turned on to start precharging the capacitor 24; and when a current sensor 34 mounted on an electric power line connected to the output terminal of a battery 22 is normal, precharging of the capacitor 24 is determined to be completed, if the current from the current sensor 34 lowers under a predetermined current, if a failure occurs in the current sensor 34, precharging of the capacitor 24 is determined as being completed, when the voltage difference between the voltage from a voltage sensor 32, mounted between terminals of the battery 22 and the voltage from a voltage sensor 36 mounted between terminals of the capacitor 24, reaches a predetermined voltage difference, so that the relay SMR1 is turned on and the relay SMR2 is turned off, thus determining precharging with higher accuracy, regardless of the existence of failures in the current sensor 34. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、直流電源の端子間に接続されたコンデンサを備えて該直流電源からの電力を負荷に供給する電力供給システムおよびその制御方法に関する。   The present invention relates to a power supply system that includes a capacitor connected between terminals of a DC power supply and supplies power from the DC power supply to a load, and a control method thereof.

従来、この種の電力供給システムとしては、バッテリの端子間とコンデンサとを抵抗を介して接続するプリチャージコンタクタ（リレー）と、バッテリの端子間とコンデンサとを抵抗を介さずに接続するメインコンタクタ（リレー）とを備えるものが提案されている（特許文献１参照）。このシステムでは、システム起動時にプリチャージコンタクタをオンとして所定時間が経過したときに、電流センサによりバッテリの電流を検出すると共に電圧センサによりコンデンサの端子間電圧を検出し、バッテリの電流が基準値以下となり、コンデンサの端子間電圧とプリチャージコンタクタのオン直前に検出したコンデンサの端子間電圧との偏差が基準値を超えたときにプリチャージが完了したと判断して、メインコンタクタを接続している。
特開平１０−３０４５０１号公報 Conventionally, this type of power supply system includes a precharge contactor (relay) that connects a battery terminal and a capacitor via a resistor, and a main contactor that connects a battery terminal and a capacitor without a resistor. (Relay) has been proposed (see Patent Document 1). In this system, when the precharge contactor is turned on at system startup and a predetermined time has elapsed, the current of the battery is detected by the current sensor and the voltage between the terminals of the capacitor is detected by the voltage sensor. When the deviation between the capacitor terminal voltage and the capacitor terminal voltage detected immediately before the precharge contactor is turned on exceeds the reference value, it is determined that precharge is completed, and the main contactor is connected. .
JP-A-10-304501

しかしながら、上述の電力供給システムでは、電流センサと電圧センサのいずれかに異常が生じたときについては考慮されていないから、センサの異常によりプリチャージが完了しているにも拘わらずメインコンタクタをオンとすることができない場合が生じる。これに対してセンサの検出結果に拘わらずプリチャージコンタクタをオンとしてから所定時間が経過したときにプリチャージが完了したと推定してメインコンタクタをオンするものを考えることもできるが、何らかの要因によりプリチャージが完了していないにも拘わらず所定時間が経過してメインコンタクタをオンしたときに、メインコンタクタに大電流が流れて損傷などの不具合が生じる場合がある。   However, the power supply system described above does not take into account the occurrence of an abnormality in either the current sensor or the voltage sensor, so the main contactor is turned on even though the precharge is completed due to the abnormality of the sensor. It may not be possible to On the other hand, regardless of the detection result of the sensor, it can be considered that the main contactor is turned on by presuming that the precharge is completed when a predetermined time has passed since the precharge contactor was turned on. When the main contactor is turned on after a predetermined time has passed although the precharge has not been completed, a large current flows through the main contactor, which may cause problems such as damage.

本発明の電力供給システムおよびその制御方法は、電流センサと電圧センサのいずれかに異常が生じてもコンデンサのプリチャージの完了を適切に判定することを目的の一つとする。本発明の電力供給システムおよびその制御方法は、システムの起動をより適切に行なうことを目的の一つとする。   An object of the power supply system and the control method thereof according to the present invention is to appropriately determine the completion of precharging of a capacitor even if an abnormality occurs in either a current sensor or a voltage sensor. An object of the power supply system and the control method thereof of the present invention is to more appropriately start the system.

本発明の電力供給システムおよびその制御方法は、上述の目的の少なくとも一部を達成するために以下の手段を採った。   The power supply system and the control method thereof according to the present invention employ the following means in order to achieve at least a part of the above-described object.

本発明の電力供給システムは、
直流電源の端子間に接続されたコンデンサを備えて該直流電源からの電力を負荷に供給する電力供給システムであって、
前記直流電源と前記コンデンサとの間に設けられ、該直流電源と該コンデンサとを電流抑制素子を介して接続および該接続の解除が可能な第１接続手段と、
前記直流電源と前記コンデンサとの間に設けられ、該直流電源と該コンデンサとを前記電流抑制素子を介さずに接続および該接続の解除が可能な第２接続手段と、
前記直流電源を流れる電流を検出する電流検出手段と、
前記直流電源および前記コンデンサの端子間電圧のうち少なくとも該コンデンサの端子間電圧を検出する電圧検出手段と、
システムの起動指示がなされたとき、前記第１接続手段が接続されるよう該第１接続手段を制御すると共に前記電流検出手段および／または前記電圧検出手段の異常を判定し、異常と判定されなかった検出手段の検出結果に基づいて前記コンデンサのプリチャージが完了したか否かを判定し、該プリチャージが完了したと判定された以降に前記第２接続手段が接続されると共に前記第１接続手段が接続解除されるよう該第１接続手段と該第２接続手段とを制御する接続制御手段と
を備えることを要旨とする。 The power supply system of the present invention includes:
A power supply system comprising a capacitor connected between terminals of a DC power supply and supplying power from the DC power supply to a load,
A first connection means provided between the DC power supply and the capacitor, capable of connecting the DC power supply and the capacitor via a current suppressing element and releasing the connection;
A second connection means provided between the DC power supply and the capacitor, capable of connecting and disconnecting the DC power supply and the capacitor without going through the current suppressing element;
Current detecting means for detecting a current flowing through the DC power supply;
A voltage detecting means for detecting at least a voltage between terminals of the capacitor among terminals of the DC power supply and the capacitor;
When an instruction to start the system is given, the first connection means is controlled so that the first connection means is connected, and an abnormality of the current detection means and / or the voltage detection means is determined. It is determined whether or not the precharge of the capacitor is completed based on the detection result of the detection means, and after the precharge is determined to be completed, the second connection means is connected and the first connection is established. The gist is provided with connection control means for controlling the first connection means and the second connection means so that the means is disconnected.

この本発明の電力供給システムでは、システムの起動指示がなされたとき、直流電源とコンデンサとを電流抑制素子を介して接続および接続の解除が可能な第１接続手段が接続されるよう制御すると共に直流電源を流れる電流を検出する電流検出手段や直流電源およびコンデンサの端子間電圧のうち少なくともコンデンサの端子間電圧を検出する電圧検出手段の異常を判定し、異常と判定されなかった検出手段の検出結果に基づいてコンデンサのプリチャージが完了したか否かを判定し、プリチャージが完了したと判定された以降に直流電源とコンデンサとを電流抑制素子を介さずに接続および接続の解除が可能な第２接続手段が接続されると共に第１接続手段が接続解除されるよう制御する。従って、電流検出手段や電圧検出手段のいずれかに異常が生じてもコンデンサのプリチャージの完了を適切に判定することができ、より適切にシステムを起動することができる。ここで、「電流抑制素子」には、レジスタが含まれる。   In the power supply system of the present invention, when the system is instructed to start, the DC power supply and the capacitor are controlled to be connected to the first connection means that can connect and disconnect the connection via the current suppressing element. Detection of current detection means that detects current flowing through the DC power supply and voltage detection means that detects at least the voltage between the terminals of the DC power supply and the capacitor, and detection means that is not determined to be abnormal Based on the result, it is determined whether or not the precharge of the capacitor is completed. After it is determined that the precharge is completed, the DC power supply and the capacitor can be connected and disconnected without going through the current suppressing element. Control is performed so that the second connecting means is connected and the first connecting means is disconnected. Therefore, even if an abnormality occurs in either the current detection means or the voltage detection means, it is possible to appropriately determine the completion of the capacitor precharge, and it is possible to start the system more appropriately. Here, the “current suppressing element” includes a resistor.

こうした本発明の電力供給システムにおいて、前記接続制御手段は、システムの起動指示がなされたとき、前記第１接続手段が接続されるよう該第１接続手段を制御すると共に前記電流検出手段の異常を判定し、該電流検出手段が異常と判定されなかったときには該電流検出手段の検出結果に基づいて前記コンデンサのプリチャージが完了したか否かを判定し、前記電流検出手段が異常と判定されたときには前記電圧検出手段の検出結果に基づいて前記コンデンサのプリチャージが完了したか否かを判定する手段であるものとすることもできる。こうすれば、電流検出手段の異常の有無に拘わらずコンデンサのプリチャージの完了を判定することができる。あるいは、前記接続制御手段は、システムの起動指示がなされたとき、前記第１接続手段が接続されるよう該第１接続手段を制御すると共に前記電圧検出手段の異常を判定し、該電圧検出手段が異常と判定されなかったときには該電圧検出手段の検出結果に基づいて前記コンデンサのプリチャージが完了したか否かを判定し、前記電圧検出手段が異常と判定されたときには前記電流検出手段の検出結果に基づいて前記コンデンサのプリチャージが完了したか否かを判定する手段であるものとすることもできる。こうすれば、電圧検出手段の異常の有無に拘わらずコンデンサのプリチャージの完了を判定することができる。   In such a power supply system of the present invention, the connection control means controls the first connection means so that the first connection means is connected when an instruction to start the system is given, and detects an abnormality in the current detection means. When the current detection means is not determined to be abnormal, it is determined whether or not the precharge of the capacitor is completed based on the detection result of the current detection means, and the current detection means is determined to be abnormal Sometimes, it may be a means for determining whether or not the precharging of the capacitor is completed based on the detection result of the voltage detecting means. In this way, it is possible to determine whether the capacitor has been precharged regardless of whether the current detection means is abnormal. Alternatively, the connection control means controls the first connection means so that the first connection means is connected when an instruction to start the system is made, determines an abnormality of the voltage detection means, and the voltage detection means Is determined as abnormal, it is determined whether or not the precharge of the capacitor has been completed based on the detection result of the voltage detection means. When the voltage detection means is determined as abnormal, the current detection means detects It may be a means for determining whether or not the precharging of the capacitor is completed based on the result. In this way, it is possible to determine whether the capacitor has been precharged regardless of whether the voltage detection means is abnormal.

また、本発明の電力供給システムにおいて、前記接続制御手段は、前記電流検出手段および前記電圧検出手段の両方が異常と判定されたときには、前記第２接続手段を接続することなく前記第１接続手段が接続解除されるよう該第１接続手段を制御する手段であるものとすることもできる。こうすれば、コンデンサのプリチャージが完了していない状態で第２接続手段が接続されるのをより確実に防止することができる。   In the power supply system of the present invention, the connection control means may be configured to connect the first connection means without connecting the second connection means when it is determined that both the current detection means and the voltage detection means are abnormal. It can also be a means for controlling the first connecting means so that is disconnected. In this way, it is possible to more reliably prevent the second connection means from being connected in a state where the precharge of the capacitor is not completed.

さらに、本発明の電力供給システムにおいて、前記電流検出手段および／または前記電圧検出手段が異常と判定されたとき操作者に該異常に対する警告を出力する警告手段を備えるものとすることもできる。こうすれば、操作者に異常の発生を知らせることができる。   Furthermore, the power supply system of the present invention may further include warning means for outputting a warning for the abnormality to the operator when the current detection means and / or the voltage detection means is determined to be abnormal. In this way, the operator can be notified of the occurrence of an abnormality.

また、本発明の電力供給システムにおいて、前記接続制御手段は、前記第１接続手段が接続されている状態で前記電流検出手段により検出された電流が所定電流未満となったときに前記コンデンサのプリチャージが完了したと判定する手段であるものとすることもできる。   In the power supply system of the present invention, the connection control means may be configured to precharge the capacitor when the current detected by the current detection means becomes less than a predetermined current with the first connection means connected. It may be a means for determining that charging has been completed.

また、本発明の電力供給システムにおいて、前記接続制御手段は、前記第１接続手段が接続されている状態で前記電圧検出手段により検出された前記直流電源の端子間電圧と前記コンデンサの端子間電圧との偏差が所定偏差未満となったときに該コンデンサのプリチャージが完了したと判定する手段であるものとすることもできる。   In the power supply system of the present invention, the connection control means may be configured such that the voltage between the terminals of the DC power source and the voltage between the terminals of the capacitor detected by the voltage detection means in a state where the first connection means is connected. It is also possible to determine that the precharge of the capacitor has been completed when the deviation from is less than a predetermined deviation.

また、本発明の電力供給システムにおいて、前記負荷は、インバータを介して前記直流電源からの電力の供給を受けて駆動する電動機であるものとすることもできる。   In the power supply system of the present invention, the load may be an electric motor that is driven by being supplied with power from the DC power supply via an inverter.

本発明の電力供給システムの制御方法は、
電力を負荷に供給可能な直流電源と、該直流電源の端子間に接続されたコンデンサと、前記直流電源と前記コンデンサとの間に設けられ該直流電源と該コンデンサとを電流抑制素子を介して接続および該接続の解除が可能な第１接続手段と、前記直流電源と前記コンデンサとの間に設けられ該直流電源と該コンデンサとを前記電流抑制素子を介さずに接続および該接続の解除が可能な第２接続手段と、前記直流電源を流れる電流を検出する電流検出手段と、前記直流電源および前記コンデンサの端子間電圧のうち少なくとも該コンデンサの端子間電圧を検出する電圧検出手段と、を備える電力供給システムの制御方法であって、
システムの起動指示がなされたとき、前記第１接続手段が接続されるよう該第１接続手段を制御すると共に前記電流検出手段および／または前記電圧検出手段の異常を判定し、異常と判定されなかった検出手段の検出結果に基づいて前記コンデンサのプリチャージが完了したか否かを判定し、該プリチャージが完了したと判定された以降に前記第２接続手段が接続されると共に前記第１接続手段が接続解除されるよう該第１接続手段と該第２接続手段とを制御する
ことを要旨とする。 The power supply system control method of the present invention includes:
A DC power source capable of supplying power to a load; a capacitor connected between terminals of the DC power source; and the DC power source and the capacitor provided between the DC power source and the capacitor via a current suppression element. First connection means capable of connecting and releasing the connection, and connecting and releasing the connection between the DC power supply and the capacitor without the current suppressing element provided between the DC power supply and the capacitor. Possible second connection means; current detection means for detecting a current flowing through the DC power supply; and voltage detection means for detecting at least a voltage between terminals of the capacitor among voltages between the DC power supply and the capacitor. A power supply system control method comprising:
When an instruction to start the system is given, the first connection means is controlled so that the first connection means is connected, and an abnormality of the current detection means and / or the voltage detection means is determined. It is determined whether or not the precharge of the capacitor is completed based on the detection result of the detection means, and after the precharge is determined to be completed, the second connection means is connected and the first connection is established. The gist is to control the first connecting means and the second connecting means so that the means is disconnected.

この本発明の電力供給システムの制御方法によれば、システムの起動指示がなされたとき、直流電源とコンデンサとを電流抑制素子を介して接続および接続の解除が可能な第１接続手段が接続されるよう制御すると共に直流電源を流れる電流を検出する電流検出手段や直流電源およびコンデンサの端子間電圧のうち少なくともコンデンサの端子間電圧を検出する電圧検出手段の異常を判定し、異常と判定されなかった検出手段の検出結果に基づいてコンデンサのプリチャージが完了したか否かを判定し、プリチャージが完了したと判定された以降に直流電源とコンデンサとを電流抑制素子を介さずに接続および接続の解除が可能な第２接続手段が接続されると共に第１接続手段が接続解除されるよう制御する。従って、電流検出手段や電圧検出手段のいずれかに異常が生じてもコンデンサのプリチャージの完了を適切に判定することができ、より適切にシステムを起動することができる。   According to the control method of the power supply system of the present invention, when the system is instructed to start, the first connection means capable of connecting and disconnecting the DC power source and the capacitor via the current suppressing element is connected. Control is performed and current detection means for detecting the current flowing through the DC power supply and voltage detection means for detecting at least the voltage between the terminals of the DC power supply and the capacitor are determined to be abnormal, and is not determined to be abnormal It is determined whether or not the precharge of the capacitor is completed based on the detection result of the detection means, and after it is determined that the precharge is completed, the DC power supply and the capacitor are connected and connected without using the current suppressing element. Control is performed so that the second connection means that can be released is connected and the first connection means is released. Therefore, even if an abnormality occurs in either the current detection means or the voltage detection means, it is possible to appropriately determine the completion of the capacitor precharge, and it is possible to start the system more appropriately.

次に、本発明を実施するための最良の形態を実施例を用いて説明する。   Next, the best mode for carrying out the present invention will be described using examples.

図１は、本発明の一実施形態としての電力供給システム２０の構成の概略を示す構成図である。実施例の電力供給システム２０は、図示するように、例えば、電気自動車に搭載される走行用のモータ１０にインバータ１２を介して電力を供給可能なシステムとして構成されており、直流電源としてのバッテリ２２と、インバータ１２の正極母線１２ａと負極母線１２ｂとに接続された平滑用のコンデンサ２４と、バッテリ２２とコンデンサ２４との間に介在するシステムメインリレーＳＭＲ（以下、これを単にリレーと呼ぶ）と、システム全体をコントロールする電子制御ユニット４０とを備える。なお、モータ１０は、例えば、永久磁石が貼り付けられたロータと三相コイルが巻回されたステータとを備える発電可能な同期発電電動機として構成されている。また、インバータ１２は、６個のトランジスタと６個のトランジスタの各々と逆並列接続された６個のダイオードとにより構成されており、トランジスタのスイッチング制御によりバッテリ２２からの直流電力を三相交流電力に変換してモータ１２の三相コイルに出力する。   FIG. 1 is a configuration diagram showing an outline of a configuration of a power supply system 20 as an embodiment of the present invention. As shown in the figure, the power supply system 20 of the embodiment is configured as a system capable of supplying power to a traveling motor 10 mounted on an electric vehicle via an inverter 12, for example, and a battery as a DC power source. 22, a smoothing capacitor 24 connected to the positive bus 12 a and the negative bus 12 b of the inverter 12, and a system main relay SMR interposed between the battery 22 and the capacitor 24 (hereinafter simply referred to as a relay). And an electronic control unit 40 for controlling the entire system. The motor 10 is configured as, for example, a synchronous generator motor capable of generating electric power, including a rotor on which a permanent magnet is attached and a stator on which a three-phase coil is wound. The inverter 12 is composed of six transistors and six diodes connected in antiparallel with each of the six transistors, and the DC power from the battery 22 is converted to three-phase AC power by switching control of the transistors. And output to the three-phase coil of the motor 12.

リレーＳＭＲは、バッテリ２２の正極端子とインバータ１２の正極母線１２ａとを接続および接続解除が可能なリレーＳＭＲ１と、抵抗２６を介して同じくバッテリ２２の正極端子とインバータ１２の正極母線１２ａとを接続および接続解除が可能なリレーＳＭＲ２と、バッテリ２２の負極端子とインバータ１２の負極母線１２ｂとを接続および接続解除が可能なリレーＳＭＲ３とから構成されている。   Relay SMR connects relay SMR1 capable of connecting and disconnecting the positive electrode terminal of battery 22 and positive electrode bus 12a of inverter 12, and also connects the positive terminal of battery 22 and positive electrode bus 12a of inverter 12 through resistor 26. And a relay SMR2 that can be disconnected, and a relay SMR3 that can connect and disconnect the negative terminal of the battery 22 and the negative bus 12b of the inverter 12.

電子制御ユニット４０は、ＣＰＵ４２を中心としたマイクロプロセッサとして構成されており、ＣＰＵ４２の他に処理プログラムを記憶するＲＯＭ４４と、データを一時的に記憶するＲＡＭ４６と、入出力ポート（図示せず）とを備える。電子制御ユニット４０には、バッテリ２２の端子間に取り付けられた電圧センサ３２からのバッテリ電圧Ｖｂやバッテリ２２の出力端子に接続された電力ラインに取り付けられた電流センサ３４からのバッテリ電流Ｉｂ，コンデンサ２４の端子間に取り付けられた電圧センサ３６からのコンデンサ電圧Ｖｃなどが入力ポートを介して入力されている。また、電子制御ユニット４０からは、リレーＳＭＲへの駆動信号や警告灯５０への点灯信号などが出力ポートを介して出力されている。   The electronic control unit 40 is configured as a microprocessor centered on the CPU 42. In addition to the CPU 42, a ROM 44 for storing processing programs, a RAM 46 for temporarily storing data, an input / output port (not shown), and the like. Is provided. The electronic control unit 40 includes a battery voltage Vb from a voltage sensor 32 attached between terminals of the battery 22, a battery current Ib from a current sensor 34 attached to a power line connected to an output terminal of the battery 22, and a capacitor. The capacitor voltage Vc from the voltage sensor 36 attached between the 24 terminals is input via the input port. Further, the electronic control unit 40 outputs a drive signal to the relay SMR, a lighting signal to the warning lamp 50, and the like through the output port.

次に、こうして構成された実施例の電力供給システム２０の動作について説明する。図２は、実施例の電力供給システム２０の電子制御ユニット４０により実行される起動処理ルーチンの一例を示すフローチャートである。このルーチンは、例えば、操作者の操作に基づいてシステム起動の指示が入力されたときに実行される。   Next, the operation of the power supply system 20 of the embodiment configured as described above will be described. FIG. 2 is a flowchart illustrating an example of a startup process routine executed by the electronic control unit 40 of the power supply system 20 according to the embodiment. This routine is executed, for example, when a system activation instruction is input based on the operation of the operator.

起動処理ルーチンが実行されると、電子制御ユニット４０のＣＰＵ４２は、まず、リレーＳＭＲ３をオンし（ステップＳ１００）、リレーＳＭＲ２をオンする（ステップＳ１１０）。これにより、バッテリ２２とコンデンサ２４とが抵抗２６を介して電気的に接続されるから、バッテリ２２からの直流電力は抵抗２６を介してコンデンサ２４に供給されコンデンサ２４のプリチャージが開始される。そして、電流センサ３４が正常であるか否かを判定する（ステップＳ１２０）。ここで、電流センサ３４が正常であるか否かの判定は、例えば、電流センサ３４の内部配線の断線や電流センサ３４から電子制御ユニット４０に至る信号ラインの断線などにより電流センサ３４からの信号が途絶えていないか否か，電流センサ３４の検出値が通常想定される値から外れた値となっていないか否かを判定することにより行なうことができる。電流センサ３４が正常であると判定されると、電流センサ３４からバッテリ電流Ｉｂを入力して（ステップＳ１３０）バッテリ電流Ｉｂが所定電流Ｉｒｅｆ未満に至るまでステップＳ１２０に戻って処理を繰り返す（ステップＳ１４０）。ここで、所定電流Ｉｒｅｆは、コンデンサ２４のプリチャージの完了を判定するための閾値であり、リレーＳＭＲ１をオンしてバッテリ２２とコンデンサ２４とを抵抗２６を介さずに直接接続してもリレーＳＭＲ１を溶着させない程度の比較的小さな電流値として予め定められている。バッテリ電流Ｉｂが所定電流Ｉｒｅｆ未満に至ると、コンデンサ２４のプリチャージは完了したと判断して、リレーＳＭＲ１をオンすると共に（ステップＳ１９０）、オンしているリレーＳＭＲ２をオフとして（ステップＳ２００）、本ルーチンを終了する。   When the activation process routine is executed, the CPU 42 of the electronic control unit 40 first turns on the relay SMR3 (step S100) and turns on the relay SMR2 (step S110). Thereby, since the battery 22 and the capacitor 24 are electrically connected via the resistor 26, the DC power from the battery 22 is supplied to the capacitor 24 via the resistor 26, and the precharging of the capacitor 24 is started. Then, it is determined whether or not the current sensor 34 is normal (step S120). Here, whether or not the current sensor 34 is normal is determined by, for example, a signal from the current sensor 34 due to disconnection of internal wiring of the current sensor 34 or disconnection of a signal line from the current sensor 34 to the electronic control unit 40. This can be done by determining whether or not the current value has been interrupted, and whether or not the detection value of the current sensor 34 has deviated from a normally assumed value. If it is determined that the current sensor 34 is normal, the battery current Ib is input from the current sensor 34 (step S130), and the process returns to step S120 and repeats the process until the battery current Ib becomes less than the predetermined current Iref (step S140). ). Here, the predetermined current Iref is a threshold value for determining the completion of the precharge of the capacitor 24, and even if the relay SMR1 is turned on and the battery 22 and the capacitor 24 are directly connected without the resistor 26, the relay SMR1. Is determined in advance as a relatively small current value that does not cause welding. When the battery current Ib reaches less than the predetermined current Iref, it is determined that the precharge of the capacitor 24 is completed, the relay SMR1 is turned on (step S190), and the relay SMR2 that is turned on is turned off (step S200). This routine ends.

一方、電流センサ３４が正常ではない、即ち電流センサ３４に異常が生じていると判定されると、次に、電圧センサ３２および電圧センサ３６のいずれもが正常であるか否かを判定する（ステップＳ１５０）。ここで、電圧センサ３２および電圧センサ３６のいずれもが正常であるか否かの判定は、例えば、電圧センサ３２や電圧センサ３６の内部配線の断線や電圧センサ３２や電圧センサ３６から電子制御ユニット４０に至る信号ラインの断線などにより電圧センサ３２や電圧センサ３６からの信号が途絶えていないか否か，電圧センサ３２や電圧センサ３６の検出値が通常想定される値から外れた値となっていないか否かを判定することにより行なうことができる。電圧センサ３２および電圧センサ３６のいずれもが正常であると判定されると、電圧センサ３２からのバッテリ電圧Ｖｂと電圧センサ３６からのコンデンサ電圧Ｖｃとを入力して（ステップＳ１６０）バッテリ電圧Ｖｂからコンデンサ電圧Ｖｃを減じて電圧差ΔＶを計算し（ステップＳ１７０）、計算した電圧差ΔＶが所定電圧差Ｖｒｅｆ未満に至るまでステップＳ１５０に戻って処理を繰り返す（ステップＳ１８０）。ここで、所定電圧差Ｖｒｅｆは、コンデンサ２４のプリチャージの完了を判定するための閾値であり、リレーＳＭＲ１をオンしてバッテリ２２とコンデンサ２４を抵抗２６を介さずに直接接続してもリレーＳＭＲ１を溶着させない程度の比較的小さな電圧差として予め定められている。電圧差ΔＶが所定電圧差Ｖｒｅｆ未満に至ると、コンデンサ２４のプリチャージは完了したと判断して、リレーＳＭＲ１をオンすると共に（ステップＳ１９０）、オンしているリレーＳＭＲ２をオフとして（ステップＳ２００）、本ルーチンを終了する。このように、電流センサ３４が正常のときには電流センサ３４からのバッテリ電流Ｉｂに基づいてコンデンサ２４のプリチャージの完了を判定し、電流センサ３４に異常が生じているときには、電圧センサ３２からのバッテリ電圧Ｖｂと電圧センサ３６からのコンデンサ電圧Ｖｃとに基づいてコンデンサ２４のプリチャージの完了を判定するのである。これにより、電流センサ３４の異常の有無に拘わらずコンデンサ２４のプリチャージの完了を適切に判定することができる。   On the other hand, if it is determined that the current sensor 34 is not normal, that is, an abnormality has occurred in the current sensor 34, it is next determined whether or not both the voltage sensor 32 and the voltage sensor 36 are normal ( Step S150). Here, whether or not both the voltage sensor 32 and the voltage sensor 36 are normal is determined by, for example, disconnection of the internal wiring of the voltage sensor 32 or the voltage sensor 36 or the electronic control unit from the voltage sensor 32 or the voltage sensor 36. Whether the signal from the voltage sensor 32 or the voltage sensor 36 is interrupted due to the disconnection of the signal line leading to 40 or the like, the detection value of the voltage sensor 32 or the voltage sensor 36 is a value deviating from the normally assumed value. This can be done by determining whether or not there is. When it is determined that both voltage sensor 32 and voltage sensor 36 are normal, battery voltage Vb from voltage sensor 32 and capacitor voltage Vc from voltage sensor 36 are input (step S160). The capacitor voltage Vc is reduced to calculate the voltage difference ΔV (step S170), and the process returns to step S150 until the calculated voltage difference ΔV becomes less than the predetermined voltage difference Vref (step S180). Here, the predetermined voltage difference Vref is a threshold value for determining the completion of the precharge of the capacitor 24, and even if the relay SMR1 is turned on and the battery 22 and the capacitor 24 are directly connected without the resistor 26, the relay SMR1. Is determined in advance as a relatively small voltage difference that does not cause welding. When the voltage difference ΔV reaches less than the predetermined voltage difference Vref, it is determined that the precharge of the capacitor 24 is completed, the relay SMR1 is turned on (step S190), and the relay SMR2 that is turned off is turned off (step S200). This routine is terminated. As described above, when the current sensor 34 is normal, the completion of the precharge of the capacitor 24 is determined based on the battery current Ib from the current sensor 34. When the current sensor 34 is abnormal, the battery from the voltage sensor 32 is determined. The completion of precharging of the capacitor 24 is determined based on the voltage Vb and the capacitor voltage Vc from the voltage sensor 36. Thereby, completion of the precharge of the capacitor 24 can be appropriately determined regardless of whether the current sensor 34 is abnormal.

なお、電圧センサ３２および電圧センサ３６のいずれもが正常でない、即ち電圧センサ３２および電圧センサ３６のいずれか又は両方に異常が生じていると判定されると、コンデンサ２４のプリチャージの完了を判定できないと判断して、リレーＳＭＲ２とリレーＳＭＲ３とをオフし（ステップＳ２１０）、警告灯５０を点灯させて（ステップＳ２２０）、本ルーチンを終了する。   If it is determined that neither the voltage sensor 32 nor the voltage sensor 36 is normal, that is, that either or both of the voltage sensor 32 and the voltage sensor 36 are abnormal, it is determined that the precharge of the capacitor 24 has been completed. It is determined that the relay cannot be performed, the relays SMR2 and SMR3 are turned off (step S210), the warning lamp 50 is turned on (step S220), and this routine is terminated.

図３に、電流センサ３４が正常であるときのコンデンサ２４のプリチャージの完了を判定する様子を示し、図４には、電流センサ３４に異常が生じているときのコンデンサ２４のプリチャージの完了を判定する様子を示す。電流センサ３４が正常であるときには、図３に示すように、システムの起動が指示され、時刻ｔ１にリレーＳＭＲ３がオンされ、時刻ｔ２にリレーＳＭＲ２がオンされたときに、バッテリ２２とコンデンサ２４とが抵抗２６を介して電気的に接続されてコンデンサ２４のプリチャージが開始される。このとき、バッテリ２２からはバッテリ２２の端子間電圧とコンデンサ２４の端子間電圧との電圧差と抵抗２６の抵抗値とに基づくバッテリ電流Ｉｂがコンデンサ２４に印加され、このバッテリ電流Ｉｂはコンデンサ２４の充電が進んでコンデンサ２４の端子間電圧が高くなるほど小さくなる。そして、時刻ｔ３にバッテリ電流Ｉｂが所定電流Ｉｒｅｆに至ったときにはプリチャージが完了したと判断してリレーＳＭＲ１をオンすると共にリレーＳＭＲ２をオフとする。一方、電流センサ３４に異常が生じているときには、図４に示すように、時刻ｔ１にリレーＳＭＲ３がオンされ、時刻ｔ２にリレーＳＭＲ２がオンされてコンデンサ２４のプリチャージが開始されると、コンデンサ２４の端子間電圧（コンデンサ電圧Ｖｃ）は充電が進むにつれて大きくなりバッテリ電圧Ｖｂに近づいていく。そして、時刻ｔ３にコンデンサ電圧Ｖｃとバッテリ電圧Ｖｂとの電圧差ΔＶが所定電圧差Ｖｒｅｆに至ったときにプリチャージが完了したと判断してリレーＳＭＲ１をオンすると共にリレーＳＭＲ２をオフとする。したがって、電流センサ３４の異常の有無に拘わらずコンデンサ２４のプリチャージの完了を適切に判定することができ、システムを起動することができる。   FIG. 3 shows how to determine completion of precharging of the capacitor 24 when the current sensor 34 is normal, and FIG. 4 shows completion of precharging of the capacitor 24 when there is an abnormality in the current sensor 34. It shows how to determine. When current sensor 34 is normal, as shown in FIG. 3, when the system is instructed, relay SMR3 is turned on at time t1, and when relay SMR2 is turned on at time t2, battery 22 and capacitor 24 Are electrically connected through the resistor 26, and the capacitor 24 starts to be precharged. At this time, the battery 22 applies a battery current Ib based on the voltage difference between the terminal voltage of the battery 22 and the terminal voltage of the capacitor 24 and the resistance value of the resistor 26 from the battery 22. As the charging proceeds, the voltage between the terminals of the capacitor 24 increases and the voltage decreases. Then, when battery current Ib reaches predetermined current Iref at time t3, it is determined that precharging is completed, and relay SMR1 is turned on and relay SMR2 is turned off. On the other hand, when an abnormality occurs in the current sensor 34, as shown in FIG. 4, when the relay SMR3 is turned on at time t1 and the relay SMR2 is turned on at time t2 to start precharging of the capacitor 24, The inter-terminal voltage (capacitor voltage Vc) of 24 increases as the charging proceeds and approaches the battery voltage Vb. Then, at time t3, when the voltage difference ΔV between the capacitor voltage Vc and the battery voltage Vb reaches the predetermined voltage difference Vref, it is determined that precharging has been completed, and the relay SMR1 is turned on and the relay SMR2 is turned off. Therefore, completion of precharging of the capacitor 24 can be appropriately determined regardless of whether the current sensor 34 is abnormal, and the system can be started.

以上説明した実施例の電力供給システム２０によれば、システムの起動が指示されたとき、バッテリ２２とコンデンサ２４とを抵抗２６を介して電気的に接続してコンデンサ２４のプリチャージを開始し、電流センサ３４が正常なときには電流センサ３４からのバッテリ電流Ｉｂに基づいてコンデンサ２４のプリチャージの完了を判定し、電流センサ３４に異常が生じているときには電圧センサ３２からのバッテリ電圧Ｖｂと電圧センサ３６からのコンデンサ電圧Ｖｃとに基づいてコンデンサ２４のプリチャージの完了を判定するから、電流センサ３４の異常の有無に拘わらずコンデンサ２４のプリチャージの完了をより適切に判定することができる。この結果、電流センサ３４の異常を考慮しないものに比してシステムをより適切に起動させることができる。   According to the power supply system 20 of the embodiment described above, when the activation of the system is instructed, the battery 22 and the capacitor 24 are electrically connected via the resistor 26 to start precharging the capacitor 24. When the current sensor 34 is normal, the completion of the precharge of the capacitor 24 is determined based on the battery current Ib from the current sensor 34. When the current sensor 34 is abnormal, the battery voltage Vb from the voltage sensor 32 and the voltage sensor are determined. Since the completion of the precharge of the capacitor 24 is determined based on the capacitor voltage Vc from 36, the completion of the precharge of the capacitor 24 can be more appropriately determined regardless of whether the current sensor 34 is abnormal. As a result, the system can be started more appropriately as compared with the case where the abnormality of the current sensor 34 is not considered.

実施例の電力供給システム２０では、基本的には、電流センサ３４からのバッテリ電流Ｉｂに基づいてコンデンサ２４のプリチャージの完了を判定し、電流センサ３４に異常が生じているときに電圧センサ３２からのバッテリ電圧Ｖｂと電圧センサ３６からのコンデンサ電圧Ｖｃに基づいてコンデンサ２４のプリチャージの完了を判定するものとしたが、基本的には、電圧センサ３２からのバッテリ電圧Ｖｂと電圧センサ３６からのコンデンサ電圧Ｖｃとに基づいてコンデンサ２４のプリチャージの完了を判定し、電圧センサ３２および電圧センサ３６のいずれかに異常が生じているときに電流センサ３４からのバッテリ電流Ｉｂに基づいてコンデンサ２４のプリチャージの完了を判定するものとしてもよい。この場合、図２の起動処理ルーチンに代えて図５の起動処理ルーチンを実行すればよい。図５の起動処理ルーチンでは、電子制御ユニット４０は、図２のステップＳ１００，Ｓ１１０と同様に、リレーＳＭＲ３をオンすると共に（ステップＳ３００）、リレーＳＭＲ２をオンし（ステップＳ３１０）、図２のステップＳ１５０〜Ｓ１８０の処理と同様に、電圧センサ３２および電圧センサ３６のいずれもが正常であるか否かを判定し（ステップＳ３２０）、正常であると判定されると、電圧センサ３２からのバッテリ電圧Ｖｂと電圧センサ３６からのコンデンサ電圧Ｖｃとを入力して（ステップＳ３３０）、両者の差をとって電圧差ΔＶを計算し（ステップＳ３４０）、電圧差ΔＶが所定電圧差Ｖｒｅｆ未満に至るまでステップＳ３２０に戻って処理を繰り返し（ステップＳ３５０）、電圧差ΔＶが所定電圧差Ｖｒｅｆ未満に至ったときにリレーＳＭＲ１をオンすると共に（ステップＳ３９０）、リレーＳＭＲ２をオフとして（ステップＳ４００）処理を終了する。一方、電圧センサ３２および電圧センサ３６のいずれか又は両方に異常が生じていると判定されると、図２のステップＳ１２０〜Ｓ１４０の処理と同様に、電流センサ３４が正常であるか否かを判定し（ステップＳ３６０）、正常であると判定されると、電流センサ３４からバッテリ電流Ｉｂを入力して（ステップＳ３７０）バッテリ電流Ｉｂが所定電流Ｉｂ未満に至るまでステップＳ３６０に戻って処理を繰り返し（ステップＳ３８０）、バッテリ電流Ｉｂが所定電流Ｉｂ未満に至ったときにリレーＳＭＲ１をオンすると共に（ステップＳ３９０）、リレーＳＭＲ２をオフとして（ステップＳ４００）、処理を終了する。一方、電流センサ３４に異常が生じていると判定されるとリレーＳＭＲ２をオフすると共にリレーＳＭＲ３をオフとし（ステップＳ４１０）、警告灯５０を点灯させて（ステップＳ４２０）、処理を終了する。こうした変形例の電力供給システムによれば、電圧センサ３２や電圧センサ３６の異常の有無に拘わらずコンデンサ２４のプリチャージの完了を適切に判定することができる。この結果、電圧センサ３２や電圧センサ３６の異常を考慮しないものに比してシステムをより適切に起動させることができる。   In the power supply system 20 of the embodiment, basically, the completion of the precharge of the capacitor 24 is determined based on the battery current Ib from the current sensor 34, and the voltage sensor 32 when an abnormality occurs in the current sensor 34. The completion of precharging of the capacitor 24 is determined based on the battery voltage Vb from the voltage sensor 36 and the capacitor voltage Vc from the voltage sensor 36. Basically, the battery voltage Vb from the voltage sensor 32 and the voltage sensor 36 Completion of precharge of the capacitor 24 is determined based on the capacitor voltage Vc of the capacitor 24, and the capacitor 24 is determined based on the battery current Ib from the current sensor 34 when an abnormality occurs in either the voltage sensor 32 or the voltage sensor 36. The completion of the precharge may be determined. In this case, the activation process routine of FIG. 5 may be executed instead of the activation process routine of FIG. In the activation process routine of FIG. 5, the electronic control unit 40 turns on the relay SMR3 (step S300) and turns on the relay SMR2 (step S310), similarly to steps S100 and S110 of FIG. Similarly to the processing of S150 to S180, it is determined whether or not both of the voltage sensor 32 and the voltage sensor 36 are normal (step S320), and if determined to be normal, the battery voltage from the voltage sensor 32 is determined. The voltage Vb and the capacitor voltage Vc from the voltage sensor 36 are input (step S330), the difference between the two is calculated to calculate the voltage difference ΔV (step S340), and the step is continued until the voltage difference ΔV reaches less than the predetermined voltage difference Vref. Returning to S320, the process is repeated (step S350), and the voltage difference ΔV has become less than the predetermined voltage difference Vref. While on the relay SMR1 to come (step S390), and ends as an off relay SMR2 (the step S400) process. On the other hand, if it is determined that an abnormality has occurred in either or both of the voltage sensor 32 and the voltage sensor 36, whether or not the current sensor 34 is normal is determined in the same manner as in steps S120 to S140 in FIG. If the battery current Ib is input from the current sensor 34 (step S370), the process returns to step S360 until the battery current Ib becomes less than the predetermined current Ib, and the process is repeated. (Step S380) When the battery current Ib reaches less than the predetermined current Ib, the relay SMR1 is turned on (Step S390), the relay SMR2 is turned off (Step S400), and the process ends. On the other hand, if it is determined that an abnormality has occurred in the current sensor 34, the relay SMR2 is turned off and the relay SMR3 is turned off (step S410), the warning lamp 50 is turned on (step S420), and the process is terminated. According to the power supply system of such a modified example, completion of precharging of the capacitor 24 can be appropriately determined regardless of whether the voltage sensor 32 or the voltage sensor 36 is abnormal. As a result, the system can be started up more appropriately as compared with the case where the abnormality of the voltage sensor 32 and the voltage sensor 36 is not taken into consideration.

実施例の電力供給システム２０やその変形例では、電圧センサ３２からのバッテリ電圧Ｖｂと電圧センサ３６からのコンデンサ電圧Ｖｃとに基づいてコンデンサ２４のプリチャージの完了を判定するものとしたが、若干精度が落ちるもののコンデンサ電圧Ｖｃだけに基づいて例えばコンデンサ電圧Ｖｃが所定電圧以上に至ったか否かによりコンデンサ２４のプリチャージの完了を判定するものとしても差し支えない。   In the power supply system 20 of the embodiment and its modification, the completion of the precharge of the capacitor 24 is determined based on the battery voltage Vb from the voltage sensor 32 and the capacitor voltage Vc from the voltage sensor 36. Although the accuracy is reduced, the completion of the precharge of the capacitor 24 may be determined based on, for example, whether the capacitor voltage Vc has reached a predetermined voltage or higher based only on the capacitor voltage Vc.

実施例の電力供給システム２０やその変形例では、電流センサ３４に異常が生じており且つ電圧センサ３２および電圧センサ３６のいずれか又は両方に異常が生じているときには、リレーＳＭＲ２とリレーＳＭＲ３とをオフとしてシステムの起動を行なわないものとしたが、電流センサ３４に異常が生じており且つ電圧センサ３２および電圧センサ３６のいずれか又は両方に異常が生じているときには、リレーＳＭＲ２とリレーＳＭＲ３とをオンとしてコンデンサ２４のプリチャージを開始してから所定時間が経過したときにコンデンサ２４のプリチャージが完了したと推定してリレーＳＭＲ１をオンするものとしても差し支えない。   In the power supply system 20 of the embodiment and its modification, when the current sensor 34 is abnormal and when one or both of the voltage sensor 32 and the voltage sensor 36 are abnormal, the relay SMR2 and the relay SMR3 are connected. Although the system is not started by turning off, when the current sensor 34 is abnormal and when one or both of the voltage sensor 32 and the voltage sensor 36 are abnormal, the relay SMR2 and the relay SMR3 are connected. The relay SMR1 may be turned on by presuming that the precharge of the capacitor 24 has been completed when a predetermined time has elapsed since the start of the precharge of the capacitor 24 by turning it on.

実施例の電力供給システム２０やその変形例では、電流センサ３４に異常が生じており且つ電圧センサ３２および電圧センサ３６のいずれか又は両方に異常が生じているときに警告を行なうものとしたが、電流センサ３４だけに異常が生じたときに警告を行なうものとしてもよいし、電圧センサ３２および電圧センサ３６のいずれか又は両方だけに異常が生じたときに警告を行なうものとしてもよい。   In the power supply system 20 of the embodiment and its modification, a warning is given when an abnormality occurs in the current sensor 34 and an abnormality occurs in one or both of the voltage sensor 32 and the voltage sensor 36. A warning may be issued when an abnormality occurs only in the current sensor 34, or a warning may be issued when an abnormality occurs in only one or both of the voltage sensor 32 and the voltage sensor 36.

実施例の電力供給システム２０やその変形例では、センサ異常に対して警告灯５０を点灯するものとしたが、警告音などの他の手法による警告を行なうものとしてもよいし、警告しないものとしても差し支えない。   In the power supply system 20 of the embodiment and its modified examples, the warning lamp 50 is turned on for sensor abnormality. However, a warning may be given by another method such as a warning sound, or no warning will be given. There is no problem.

実施例の電力供給システム２０やその変形例では、バッテリ２２と、コンデンサ２４と、バッテリ２２とコンデンサ２４とに介在するリレーＳＭＲ（リレーＳＭＲ１，ＳＭＲ２，ＳＭＲ３）とを備えるものとしたが、図６の変形例の電力供給システムに示すように、バッテリ２２とコンデンサ２４との間に昇圧回路６０を設けるものとしてもよい。この場合、例えば、リレーＳＭＲ１とリレーＳＭＲ３とを接続したときには、バッテリ２２からの直流電力を昇圧回路６０が備えるダイオードＤ１を介してコンデンサ２４に供給してコンデンサ２４をプリチャージするものとすればよい。   In the power supply system 20 of the embodiment and its modification, the battery 22, the capacitor 24, and the relay SMR (relays SMR 1, SMR 2, SMR 3) interposed between the battery 22 and the capacitor 24 are provided. As shown in the power supply system of the modified example, a booster circuit 60 may be provided between the battery 22 and the capacitor 24. In this case, for example, when the relay SMR1 and the relay SMR3 are connected, the DC power from the battery 22 is supplied to the capacitor 24 via the diode D1 provided in the booster circuit 60 to precharge the capacitor 24. .

実施例の電力供給システム２０では、電気自動車に搭載される走行用のモータ１０に電力を供給するシステムとして適用するものとしたが、抵抗などの電流抑制素子を介してコンデンサと接続できると共に電流抑制素子を介さずにコンデンサと接続できるバッテリなどの直流電源から負荷に電力を供給する如何なるシステムにも適用することができる。   In the power supply system 20 of the embodiment, the power supply system 20 is applied as a system for supplying power to the traveling motor 10 mounted on the electric vehicle. The present invention can be applied to any system that supplies power to a load from a DC power source such as a battery that can be connected to a capacitor without passing through an element.

以上、本発明を実施するための最良の形態について実施例を用いて説明したが、本発明はこうした実施例に何等限定されるものではなく、本発明の要旨を逸脱しない範囲内において、種々なる形態で実施し得ることは勿論である。   The best mode for carrying out the present invention has been described with reference to the embodiments. However, the present invention is not limited to these embodiments, and various modifications can be made without departing from the gist of the present invention. Of course, it can be implemented in the form.

本発明は、電力供給システム製造産業などに利用可能である。   The present invention can be used in the power supply system manufacturing industry and the like.

本発明の一実施形態としての電力供給システム２０の構成の概略を示す構成図である。It is a block diagram which shows the outline of a structure of the electric power supply system 20 as one Embodiment of this invention. 実施例の電力供給システム２０の電子制御ユニット４０により実行される起動処理ルーチンの一例を示すフローチャートである。It is a flowchart which shows an example of the starting process routine performed by the electronic control unit 40 of the electric power supply system 20 of an Example. 電流センサ３４が正常であるときのコンデンサ２４のプリチャージの完了を判定する様子を示す説明図である。It is explanatory drawing which shows a mode that the completion of the precharge of the capacitor | condenser 24 when the current sensor 34 is normal is determined. 電流センサ３４に異常が生じているときのコンデンサ２４のプリチャージの完了を判定する様子を示す説明図である。It is explanatory drawing which shows a mode that the completion of the precharge of the capacitor | condenser 24 when abnormality has arisen in the current sensor 34 is determined. 変形例の起動処理ルーチンの一例を示すフローチャートである。It is a flowchart which shows an example of the starting process routine of a modification. 変形例の電力供給システムの構成の概略を示す構成図である。It is a block diagram which shows the outline of a structure of the electric power supply system of a modification.

符号の説明Explanation of symbols

１０ モータ、１２ インバータ、１２ａ 正極母線、１２ｂ 負極母線、２０ 電力供給システム、２２ バッテリ、２４ コンデンサ、２６ 抵抗、３２ 電圧センサ、３４ 電流センサ、３６ 電圧センサ、４０ 電子制御ユニット、４２ ＣＰＵ、４４ ＲＯＭ、４６ ＲＡＭ、５０ 警告灯、６０ 昇圧回路、ＳＭＲ，ＳＭＲ１，ＳＭＲ２，ＳＭＲ３ システムメインリレー（リレー）。
10 motor, 12 inverter, 12a positive bus, 12b negative bus, 20 power supply system, 22 battery, 24 capacitor, 26 resistance, 32 voltage sensor, 34 current sensor, 36 voltage sensor, 40 electronic control unit, 42 CPU, 44 ROM 46 RAM, 50 warning light, 60 booster circuit, SMR, SMR1, SMR2, SMR3 System main relay (relay).

Claims (9)

直流電源の端子間に接続されたコンデンサを備えて該直流電源からの電力を負荷に供給する電力供給システムであって、
前記直流電源と前記コンデンサとの間に設けられ、該直流電源と該コンデンサとを電流抑制素子を介して接続および該接続の解除が可能な第１接続手段と、
前記直流電源と前記コンデンサとの間に設けられ、該直流電源と該コンデンサとを前記電流抑制素子を介さずに接続および該接続の解除が可能な第２接続手段と、
前記直流電源を流れる電流を検出する電流検出手段と、
前記直流電源および前記コンデンサの端子間電圧のうち少なくとも該コンデンサの端子間電圧を検出する電圧検出手段と、
システムの起動指示がなされたとき、前記第１接続手段が接続されるよう該第１接続手段を制御すると共に前記電流検出手段および／または前記電圧検出手段の異常を判定し、異常と判定されなかった検出手段の検出結果に基づいて前記コンデンサのプリチャージが完了したか否かを判定し、該プリチャージが完了したと判定された以降に前記第２接続手段が接続されると共に前記第１接続手段が接続解除されるよう該第１接続手段と該第２接続手段とを制御する接続制御手段と
を備える電力供給システム。 A power supply system comprising a capacitor connected between terminals of a DC power supply and supplying power from the DC power supply to a load,
A first connection means provided between the DC power supply and the capacitor, capable of connecting the DC power supply and the capacitor via a current suppressing element and releasing the connection;
A second connection means provided between the DC power supply and the capacitor, capable of connecting and disconnecting the DC power supply and the capacitor without going through the current suppressing element;
Current detecting means for detecting a current flowing through the DC power supply;
A voltage detecting means for detecting at least a voltage between terminals of the capacitor among terminals of the DC power supply and the capacitor;
When an instruction to start the system is given, the first connection means is controlled so that the first connection means is connected, and an abnormality of the current detection means and / or the voltage detection means is determined. It is determined whether or not the precharge of the capacitor is completed based on the detection result of the detection means, and after the precharge is determined to be completed, the second connection means is connected and the first connection is established. A power supply system comprising: connection control means for controlling the first connection means and the second connection means so that the means is disconnected. 前記接続制御手段は、システムの起動指示がなされたとき、前記第１接続手段が接続されるよう該第１接続手段を制御すると共に前記電流検出手段の異常を判定し、該電流検出手段が異常と判定されなかったときには該電流検出手段の検出結果に基づいて前記コンデンサのプリチャージが完了したか否かを判定し、前記電流検出手段が異常と判定されたときには前記電圧検出手段の検出結果に基づいて前記コンデンサのプリチャージが完了したか否かを判定する手段である請求項１記載の電力供給システム。   The connection control means controls the first connection means so that the first connection means is connected when a system activation instruction is given, determines an abnormality of the current detection means, and the current detection means is abnormal. Is determined based on the detection result of the current detection means, it is determined whether or not the precharge of the capacitor has been completed. When the current detection means is determined to be abnormal, the detection result of the voltage detection means is determined. 2. The power supply system according to claim 1, wherein said power supply system is means for determining whether or not precharging of said capacitor is completed based on. 前記接続制御手段は、システムの起動指示がなされたとき、前記第１接続手段が接続されるよう該第１接続手段を制御すると共に前記電圧検出手段の異常を判定し、該電圧検出手段が異常と判定されなかったときには該電圧検出手段の検出結果に基づいて前記コンデンサのプリチャージが完了したか否かを判定し、前記電圧検出手段が異常と判定されたときには前記電流検出手段の検出結果に基づいて前記コンデンサのプリチャージが完了したか否かを判定する手段である請求項１記載の電力供給システム。   The connection control means controls the first connection means so that the first connection means is connected when a system activation instruction is given, determines an abnormality of the voltage detection means, and the voltage detection means is abnormal. If it is determined that the pre-charging of the capacitor is completed based on the detection result of the voltage detection means, and if the voltage detection means is determined to be abnormal, the detection result of the current detection means 2. The power supply system according to claim 1, wherein said power supply system is means for determining whether or not precharging of said capacitor is completed based on. 前記接続制御手段は、前記電流検出手段および前記電圧検出手段の両方が異常と判定されたときには、前記第２接続手段を接続することなく前記第１接続手段が接続解除されるよう該第１接続手段を制御する手段である請求項１ないし３いずれか記載の電力供給システム。   The connection control unit is configured to connect the first connection unit so that the first connection unit is disconnected without connecting the second connection unit when it is determined that both the current detection unit and the voltage detection unit are abnormal. 4. The power supply system according to claim 1, wherein the power supply system is means for controlling the means. 前記電流検出手段および／または前記電圧検出手段が異常と判定されたとき操作者に該異常に対する警告を出力する警告手段を備える請求項１ないし４いずれか記載の電力供給システム。   5. The power supply system according to claim 1, further comprising a warning unit that outputs a warning for the abnormality to the operator when the current detection unit and / or the voltage detection unit is determined to be abnormal. 前記接続制御手段は、前記第１接続手段が接続されている状態で前記電流検出手段により検出された電流が所定電流未満となったときに前記コンデンサのプリチャージが完了したと判定する手段である請求項１ないし５いずれか記載の電力供給システム。   The connection control means is means for determining that the precharging of the capacitor is completed when the current detected by the current detection means becomes less than a predetermined current in a state where the first connection means is connected. The power supply system according to claim 1. 前記接続制御手段は、前記第１接続手段が接続されている状態で前記電圧検出手段により検出された前記直流電源の端子間電圧と前記コンデンサの端子間電圧との偏差が所定偏差未満となったときに該コンデンサのプリチャージが完了したと判定する手段である請求項１ないし６いずれか記載の電力供給システム。   In the connection control means, the deviation between the voltage between the terminals of the DC power source and the voltage between the terminals of the capacitor detected by the voltage detection means in a state where the first connection means is connected is less than a predetermined deviation. 7. The power supply system according to claim 1, wherein said power supply system is a means for determining that precharging of said capacitor has been completed. 前記負荷は、インバータを介して前記直流電源からの電力の供給を受けて駆動する電動機である請求項１ないし７いずれか記載の電力供給システム。   The power supply system according to any one of claims 1 to 7, wherein the load is an electric motor that is driven by being supplied with electric power from the DC power supply via an inverter. 電力を負荷に供給可能な直流電源と、該直流電源の端子間に接続されたコンデンサと、前記直流電源と前記コンデンサとの間に設けられ該直流電源と該コンデンサとを電流抑制素子を介して接続および該接続の解除が可能な第１接続手段と、前記直流電源と前記コンデンサとの間に設けられ該直流電源と該コンデンサとを前記電流抑制素子を介さずに接続および該接続の解除が可能な第２接続手段と、前記直流電源を流れる電流を検出する電流検出手段と、前記直流電源および前記コンデンサの端子間電圧のうち少なくとも該コンデンサの端子間電圧を検出する電圧検出手段と、を備える電力供給システムの制御方法であって、
システムの起動指示がなされたとき、前記第１接続手段が接続されるよう該第１接続手段を制御すると共に前記電流検出手段および／または前記電圧検出手段の異常を判定し、異常と判定されなかった検出手段の検出結果に基づいて前記コンデンサのプリチャージが完了したか否かを判定し、該プリチャージが完了したと判定された以降に前記第２接続手段が接続されると共に前記第１接続手段が接続解除されるよう該第１接続手段と該第２接続手段とを制御する
電力供給システムの制御方法。
A DC power source capable of supplying power to a load; a capacitor connected between terminals of the DC power source; and the DC power source and the capacitor provided between the DC power source and the capacitor via a current suppression element. First connection means capable of connecting and releasing the connection, and connecting and releasing the connection between the DC power supply and the capacitor without the current suppressing element provided between the DC power supply and the capacitor. Possible second connection means; current detection means for detecting a current flowing through the DC power supply; and voltage detection means for detecting at least a voltage between terminals of the capacitor among voltages between the DC power supply and the capacitor. A power supply system control method comprising:
When an instruction to start the system is given, the first connection means is controlled so that the first connection means is connected, and an abnormality of the current detection means and / or the voltage detection means is determined. It is determined whether or not the precharge of the capacitor is completed based on the detection result of the detection means, and after the precharge is determined to be completed, the second connection means is connected and the first connection is established. A control method for a power supply system, wherein the first connection means and the second connection means are controlled such that the means is disconnected.
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