POWER CONVERSION DEVICE

• Main Authors: SASAKI KAZUYUKI, UCHIHARA MASAFUMI
• Format: Patent
• Language: English; Japanese
• Published: 25.07.2016
• 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 THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION

PROBLEM TO BE SOLVED: To provide a power conversion device capable of highly accurately suppressing a circulation current even if responsiveness of a current sensor is low.SOLUTION: When a period between off-timing of a first arm and on-timing of a seventh arm is defined as a first period, a period for which the first period is delayed by a response delay time of the current sensor is defined as a first integration period, a period between off-timing of a third arm and on-timing of a fifth arm is defined as a second period and a period for which the second period is delayed by the response delay time of the current sensor is defined as a second integration period, in the power conversion device, a control part corrects off-timing of the fifth arm in such a manner that a first integration value which is obtained by integrating a measurement of the current sensor for the first integration period becomes close to zero, or corrects off-timing of the seventh arm in such a manner that a second integration value which is obtained by integrating the measurement of the current sensor for the second integration period becomes close to zero.SELECTED DRAWING: Figure 2 【課題】電流センサの応答性が低くても、循環電流を高精度に抑制できる、電力変換装置の提供。【解決手段】第１アームのオフタイミングと第７アームのオンタイミングとの間の期間を第１期間とし、第１期間を電流センサの応答遅れ時間遅らせた期間を第１積分期間とし、第３アームのオフタイミングと第５アームのオンタイミングとの間の期間を第２期間とし、第２期間を電流センサの応答遅れ時間遅らせた期間を第２積分期間とするとき、制御部は、電流センサの計測値を第１積分期間積分して得られる第１積分値が零に近づくように第５アームのオフタイミングを補正する、又は電流センサの計測値を第２積分期間積分して得られる第２積分値が零に近づくように第７アームのオフタイミングを補正する、電力変換装置。【選択図】図２