基于无源控制的车用双管升压变换器研究
Research on automotive dual-switches boost converter based on passive control
范灿明 1李惠林 1边东生 2何锋1
作者信息
- 1. 贵州大学机械工程学院 贵阳 550025
- 2. 奇瑞万达贵州客车股份有限公司 贵阳 550025
- 折叠
摘要
新能源汽车能处于正确的电压级别下安全可靠地运行,DC/DC变换器发挥着重要作用,针对其现有控制方法多为线性控制,难以应对负载与输入电压参数多变的情况的问题;在非线性控制既无源控制的基础上引入了PI阻抗反馈补偿环路的概念,提出了一种PI阻抗补偿无源控制策略.为证明其优越性,与现有方法进行了比较.并针对负载与输入电压参数变化情况进行了模拟仿真,结果表明,该策略在输入电压跌落8 V后,仅产生了2 V的波动;负载突变为初值的一半时,仅用了不到0.01 s便重新抬升至给定电压值.由仿真结果可得,该策略不仅响应速度快、不会产生超调现象,而且在负载和输入电压发生较大变化的情况下,仍能很好的抵御外部干扰并保持输出电压的稳定性和优秀的电压纹波抑制效果,具有良好的鲁棒性.
Abstract
New energy vehicles are designed to operate reliably at precise voltage levels,and the DC/DC converters play a pivotal role in this operation.However,the existing control methods for these converters are predominantly linear and struggle to adapt to varying load and input voltage conditions.To address this,we propose the"PI Impedance Compensation Passive Control Strategy,"which incorporates a PI impedance feedback compensation loop based on non-linear control principles.To establish its superiority,a comparative analysis was conducted against existing methods.Simulations focused on assessing the strategy's performance under varying load and input voltage conditions.Results showed a mere 2 V fluctuation after an 8 V drop in input voltage.In the scenario of a sudden load transition to half of its initial value,the strategy swiftly readjusted to the designated voltage in under 0.01 seconds.These simulations confirmed the strategy's rapid response without overshooting.Even in instances of significant load and input voltage variations,the strategy effectively mitigated external disturbances,maintaining output voltage stability and achieving outstanding voltage ripple suppression,highlighting its robustness.
关键词
无源控制/双管升压变换器/DC/DC变换器/鲁棒性Key words
passive control/dual-switches boost converter/DC/DC converter/robustness引用本文复制引用
出版年
2024
NETL
NSTL
万方数据