一种基于变频器直流母线的电压稳定方法及系统
By constructing a virtual capacitor by connecting a supercapacitor in parallel with the DC bus of the frequency converter, and combining data processing and IGBT chip junction temperature, the voltage is dynamically adjusted, which solves the problem of inaccurate DC bus voltage control and improves the stability and lifespan of the frequency converter.
CN121584986BActive Publication Date: 2026-07-17SHENZHEN SAMWHA POWER TECH CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHENZHEN SAMWHA POWER TECH CO LTD
- Filing Date
- 2026-01-27
- Publication Date
- 2026-07-17
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Figure CN121584986B_ABST
Abstract
本申请公开了一种基于变频器直流母线的电压稳定方法及系统，其中方法包括：采用超级电容与直流母线并联构建虚拟电容，采集数据并对数据进行预处理并输出标准化数据集；基于标准化数据集，获取虚拟电容值，并用于控制超级电容以校正参数，同时获取虚拟电容SOC；根据工况数据获取动态母线电压基准，结合直流母线电压获取校正后实际电压偏差，与目标偏差对比获取校正误差，再结合IGBT芯片结温获取校正参数权重；根据动态母线电压基准判断直流母线状态，并基于工况数据与虚拟电容SOC，控制虚拟电容充放电以稳定直流母线的电压。通过上述方式，本申请能够实现对直流母线的精确调整，从而确保直流母线的电压处于稳定状态，提高变频器的性能与寿命。
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