電力変換装置
JP7892083B2Active Publication Date: 2026-07-17MITSUBISHI ELECTRIC CORP
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- MITSUBISHI ELECTRIC CORP
- Filing Date
- 2023-02-03
- Publication Date
- 2026-07-17
AI Technical Summary
Benefits of technology
【0008】 本願明細書に開示される一例の電力変換装置は、スイッチング回路の入力側に磁気結合リアクトルを備え、磁性体コアのギャップの調整により、PWM制御の位相であるPWM位相が同じレグに接続された巻線間の結合度が、PWM位相が異なるレグに接続された巻線間の結合度よりも高いので、巻線間の結合度の大小関係を用いてインダクタンスを高めると共に巻線の電流振幅を低減することができる。
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Abstract
This electric power conversion device (50) comprises: a switching circuit (4) in which a plurality of legs (41) are connected in parallel, each of the plurality of legs (41) having an upper arm (S1) and a lower arm (S2) connected in series; a magnetic coupling reactor (3) in which a number of windings (31, 32, 33, 34) equal to the number of legs (41) are magnetically coupled to each other; and a control circuit (7) that performs PWM control at a phase shift of 180 degrees and drives the plurality of legs (41). In the magnetic coupling reactor (3): one end of each of the windings (31, 32, 33, 34) is connected to an input terminal (18a); the other end of each of the windings (31, 32, 33, 34) is connected to a connection point (Na) between the upper arm (S1) and the lower arm (S2) in the corresponding leg (41); and the degree of magnetic coupling between windings (31, 33 and 32, 34) connected to legs (41) having the same PWM phase, which is the phase of the PWM control, is higher than the degree of magnetic coupling between windings connected to legs having different PWM phases.
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