POWER CONVERSION DEVICE

• Main Author: KAZAOKA RYOYA
• Format: Patent
• Language: English; Japanese
• Published: 21.10.2022
• 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; ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES; ELECTRICITY; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL; GENERATION; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; PERFORMING OPERATIONS; TRANSPORTING; VEHICLES IN GENERAL

To provide a power conversion device that does not allow a rotary electric machine to output torque equal to or more than a predetermined value at the time of temperature increase control during vehicle stop.SOLUTION: A power conversion device 10 includes an inverter 30 for converting DC power supplied from a battery pack 20 into AC power by switching control and supplies the AC power from the inverter 30 to a rotary electric machine 40 having a winding 41. Further, the power conversion device 10 includes a control device 70 for performing switching control of upper arm switches QUH, QVH and QWH and lower arm switches QUL, QVL and QWL so that current flows into the battery pack 20 via the inverter 30 and the winding 41 to control temperature rise of the battery pack 20. The control device 70 acquires current of the rotary electric machine 40 flowing in a neutral point O of the winding 41 in temperature rise control at the time of vehicle stop to control a command current so as to gradually increase the current within a current control range where torque of the rotary electric machine is less than upper limit torque.SELECTED DRAWING: Figure 1 【課題】車両停止中の昇温制御時において、回転電機から所定以上のトルクを出力させない電力変換装置を提供すること。【解決手段】電力変換装置１０は、スイッチング制御により組電池２０から供給される直流電力を交流電力に変換するインバータ３０を備え、インバータ３０からの交流電力を、巻線４１を有する回転電機４０に供給する。また、電力変換装置１０は、インバータ３０及び巻線４１を介して組電池２０に電流が流れるように、上アームスイッチＱＵＨ，ＱＶＨ，ＱＷＨ及び下アームスイッチＱＵＬ，ＱＶＬ，ＱＷＬのスイッチング制御を行って、組電池２０の昇温制御を行う制御装置７０を備える。制御装置７０は、車両停止時の昇温制御において、巻線４１の中性点Ｏに流れる回転電機４０の電流を取得し、回転電機のトルクが上限トルク未満となる電流制御範囲内で、電流を徐々に増加させるように、指令電流を制御する。【選択図】 図１