DRIVE DEVICE FOR ROTARY ELECTRIC MACHINE

• Main Authors: SHIMIZU HIROSHI, YAMAGUCHI MIHO
• Format: Patent
• Language: English; Japanese
• Published: 03.02.2022
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROL OR REGULATION THEREOF; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION

To provide a technology capable of achieving both failure diagnosis of a current sensor and reduction in the number of the current sensors, in a drive circuit that executes H-drive.SOLUTION: A drive device 10 is applied to a rotary electric machine having a plurality of coils corresponding to a plurality of phases and comprises: a drive circuit 11 that includes a first inverter INV1 connected with a DC power supply and having upper and lower arm switches connected with one end of each coil for each phase, a second inverter INV2 having upper and lower arm switches connected with the other end of each coil for each phase, phase current sensors DU, DV and DW respectively provided to a plurality of phase connection lines for connecting between the first and second inverters for each phase, a high potential connection line La, and a low potential connection line Lb, and that achieves H-drive of the rotary electric machine; and a controller 12 that can control actuation of the first and second inverters. The controller 12 executes failure diagnosis of the phase current sensors on the basis of a total current calculated based on phase currents detected by the phase current sensors at the H-drive of the rotary electric machine.SELECTED DRAWING: Figure 1 【課題】Ｈ駆動を実行する駆動回路において、電流センサの故障診断と、電流センサの個数低減とを両立可能な技術を提供する。【解決手段】駆動装置１０は、複数相に対応する複数の巻線を有する回転電機に適用され、直流電源に接続され巻線の一端に相ごとに接続された上下アームスイッチを備える第１インバータＩＮＶ１と、巻線の他端に相ごとに接続された上下アームスイッチを備える第２インバータＩＮＶ２と、第１インバータと第２インバータとを相ごとに接続する複数の相接続線のそれぞれに１つずつ設けられた相電流センサＤＵ，ＤＶ，ＤＷと、高電位接続線Ｌａと、低電位接続線Ｌｂとを含み、回転電機のＨ駆動が可能な駆動回路１１と、第１インバータと第２インバータの作動を制御可能な制御部１２とを備える。制御部１２は、回転電機のＨ駆動時に相電流センサが検出する相電流に基づいて算出した総和電流に基づいて、相電流センサの故障診断を実行する。【選択図】 図１