Charging and discharging circuit and frequency converter
By dividing the control cycle of the three-phase interleaved BUCK-BOOST circuit into three sub-cycles and setting different duty cycles in each sub-cycle, phase-shifting sampling is achieved, solving the control problem of the three-phase interleaved BUCK-BOOST converter, improving the simplicity and accuracy of sampling and control, and enhancing the versatility of the circuit.
CN122419210APending Publication Date: 2026-07-17SHANGHAI SIGRINER STEP ELECTRIC
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHANGHAI SIGRINER STEP ELECTRIC
- Filing Date
- 2025-01-15
- Publication Date
- 2026-07-17
Smart Images
Figure CN122419210A_ABST
Abstract
本公开实施例涉及电路领域，提供一种充放电电路及变频器，包括：三相交错BUCK‑BOOST电路，所述三相交错BUCK‑BOOST电路包括：三相上桥单元用于提供充电电压，三相下桥单元用于提供放电电压；控制模块，控制模块与三相交错BUCK‑BOOST电路电连接，用于提供驱动三相上桥单元及三相下桥单元运行的控制信号，控制信号同时控制三相上桥单元的三个充电IGBT，或者，同时控制三相下桥单元的三个放电IGBT，其中，控制信号包括多个重复单元的控制周期，每个控制周期包括时间相等的三个子周期，每个子周期控制三相上桥单元的三个充电IGBT运行的占空比不全相同，或者，每个子周期控制三相下桥单元的三个放电IGBT运行的占空比不全相同。可以降低控制难度。
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