JP2022059189A - 電力変換装置 - Google Patents
電力変換装置 Download PDFInfo
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- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
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- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/66—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
- H02M7/68—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters
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- H02M7/797—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
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- H02J7/00304—Overcurrent protection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0009—Devices or circuits for detecting current in a converter
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/36—Means for starting or stopping converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/219—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
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- B60L2210/00—Converter types
- B60L2210/30—AC to DC converters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
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Abstract
Description
電気自動車101は、電力変換装置100に加えて、蓄電部110、インバータ120、電動機130、表示装置140、および、車両本体側制御部150を備える。
電力変換装置100は、図2に示すように、電源ライン1、遮断部2、フィルタ回路部3、電力変換部4、漏電検知部5、故障判定部6、および、電力変換制御部7、を含む。電力変換装置100は、電気自動車101に搭載されており、電気自動車101の外部の交流電源から入力された交流電力を蓄電部110が充電可能な直流電力に変換することと、電気自動車101の内部の蓄電部110から出力された直流電力を電気自動車101の外部に出力するための交流電力に変換することとを行う。
電力変換制御部7は、図4に示すように、電力変換部4による電力の変換を制御する。具体的には、電力変換制御部7は、電力変換部4のブリッジ部41に含まれるスイッチング素子Sw(IGBT)のオンオフを制御するための制御信号(PWM信号)を出力する。そして、電力変換制御部7は、制御信号としてPWM信号を出力することによって、電力変換部4をPWM制御する。すなわち、電力変換制御部7は、電力変換部4を制御することによって、電気自動車101の内部の蓄電部110から出力された直流電力を変換して外部装置側に交流電力を出力することと、電気自動車101の外部の交流電源から入力された交流電力を変換して蓄電部110側に直流電力を出力することとを、切り替えて行わせる。
本実施形態では、図5に示すように、電力変換制御部7は、零相変流器51に含まれる2次巻線51aに流れる電流が、漏電閾値α(所定の閾値)よりも大きい場合、電源ライン1が漏電していると判定するように構成されている。すなわち、電力変換制御部7は、2次巻線51aに流れる電流に基づいて漏電検知部5に含まれる漏電検知回路部52によって出力された検出値aが、定められた漏電閾値αよりも大きい場合に、電源ライン1が漏電していると判定する。電力変換制御部7は、たとえば、電源ライン1を流れる漏電電流の値が8mA以上である場合に、電源ライン1において漏電が発生していると判定する。すなわち、電力変換制御部7は、電源ライン1を流れる電流が8mAである場合に漏電検知回路部52によって出力される検出値aを漏電閾値αとして定める。
本実施形態では、電力変換制御部7は、漏電検知部5による検知結果である検出値aに基づいて漏電検知情報を取得する。そして、電力変換制御部7は、取得された漏電検知情報を電気自動車101に搭載されている車両本体側制御部150に出力するように構成されている。具体的には、電力変換制御部7は、電力変換部4によって電気自動車101の外部に対して交流電力を出力している際に、漏電検知部5による検知結果である検出値aが漏電閾値αよりも大きい場合に漏電検知情報を取得する。そして、電力変換制御部7は、漏電検知情報が取得された場合に、電気自動車101の外部において漏電状態にあることを示す情報である漏電検知情報を、車両本体側制御部150に対して出力する。漏電検知情報は、たとえば、漏電が検出された時刻、漏電が検出された際に電源ライン1を流れた電流、および、漏電が検出された際に出力されていた電流値および電圧値などの情報を含む。
図8に示すように、電力変換制御部7は、漏電検知部5によって取得された漏電検知信号としてのパルス電流のパルス幅δが、検出値範囲β(所定の範囲)内であるか否かによって、漏電検知部5の故障を判定するように構成されている。具体的には、電力変換制御部7は、漏電検知信号としてのパルス電流のパルス幅δを漏電検知部5の漏電検知回路部52によって出力された疑似漏電検出値bとして取得する。そして、電力変換制御部7は、取得した疑似漏電検出値bに基づいて、漏電検知部5の故障の判定を行う。つまり、電力変換制御部7は、取得した疑似漏電検出値bが検出値範囲βに含まれるか否かによって、漏電検知部5の故障を判定する。
本実施形態では、以下のような効果を得ることができる。
なお、今回開示された実施形態は、すべての点で例示であって制限的なものではないと考えられるべきである。本発明の範囲は、上記した実施形態の説明ではなく特許請求の範囲によって示され、さらに特許請求の範囲と均等の意味および範囲内でのすべての変更(変形例)が含まれる。
2 遮断部
4 電力変換部
5 漏電検知部
6 故障判定部
7 電力変換制御部
51 零相変流器
51a 2次巻線
100 電力変換装置
101 電気自動車(車両)
110 蓄電部
150 車両本体側制御部
Claims (2)
- 入力された直流電力を変換することによって交流電力を出力する電力変換部と、
前記電力変換部によって交流電力が出力されている際に、前記電力変換部によって出力された交流電流が流れる電源ラインの漏電を検出する漏電検知部と、
前記電力変換部による電力の変換を制御する電力変換制御部と、
前記電源ラインに発生する漏電を疑似的に再現するためのパルス電流を出力する故障判定部と、を備え、
前記漏電検知部は、前記故障判定部から出力されたパルス電流に基づいて、漏電検知信号としてのパルス電流を取得するように構成されており、
前記電力変換制御部は、前記漏電検知部による検知結果に基づいて前記電力変換部の電力変換動作を停止させるように構成されているとともに、前記漏電検知部によって取得された前記漏電検知信号としてのパルス電流のパルス幅が、所定の範囲内であるか否かによって、前記漏電検知部の故障を判定するように構成されている、電力変換装置。 - 前記電力変換制御部は、前記漏電検知部によって取得された前記漏電検知信号としてのパルス電流のパルス幅が前記所定の範囲内である場合には、前記漏電検知部が正常であるとする判定結果を取得し、前記漏電検知部によって取得された前記漏電検知信号としてのパルス電流のパルス幅が前記所定の範囲よりも大きい値である場合には、前記漏電検知部が層間短絡を起こしているとする判定結果を取得するとともに、前記漏電検知部によって取得された前記漏電検知信号としてのパルス電流のパルス幅が前記所定の範囲よりも小さい値である場合には、前記漏電検知部が断線を起こしているとする判定結果を取得するように構成されている、請求項1に記載の電力変換装置。
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JP2020166765A JP2022059189A (ja) | 2020-10-01 | 2020-10-01 | 電力変換装置 |
US17/461,067 US20220109383A1 (en) | 2020-10-01 | 2021-08-30 | Power conversion device |
CN202111019340.5A CN114285306A (zh) | 2020-10-01 | 2021-09-01 | 电力变换装置 |
EP21194413.7A EP3978942A1 (en) | 2020-10-01 | 2021-09-01 | Power conversion device |
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