POWER CONVERSION DEVICE, DRIVE DEVICE, AND POWER STEERING DEVICE

• Main Author: OHASHI HIROMITSU
• Format: Patent
• Language: English; Japanese
• Published: 18.03.2021
• 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 power conversion device, a drive device, and a power steering device which perform efficient inverter control with heat dissipation.SOLUTION: A power conversion device (motor drive unit 1000) includes neutralization mechanisms 121 and 122 provided separately from a first inverter and a second inverter, which can switch the other side of a first inverter 111 and a second inverter 112 between an inverter and a neutral point, and control circuits 301 and 302. The control circuit switches between two-sided drive that drives the motor 200 with both the first and second inverters and one-sided drive that drives the motor with one of the first and second inverters using the neutral point. In the one-side drive, the drive of the motor by the first inverter and the drive of the motor by the second inverter are alternately executed.SELECTED DRAWING: Figure 2 【課題】放熱が効率的なインバータ制御を行う電力変換装置、駆動装置およびパワーステアリング装置を提供する。【解決手段】電力変換装置（モータ駆動ユニット１０００）は、第１インバータ１１１および第２インバータ１１２の一方から見た他方側をインバータと中性点とに切り替え可能な、第１インバータおよび第２インバータとは別に設けられた中性点化機構１２１、１２２と、制御回路３０１、３０２と、を備える。制御回路は、第１インバータおよび第２インバータの双方でモータ２００を駆動する両側駆動と、中性点を使って第１インバータおよび第２インバータの一方でモータを駆動する片側駆動とを切替えるとともに、片側駆動では、第１インバータによるモータの駆動と第２インバータによるモータの駆動とを交互に実行させる。【選択図】図２