对于24V内置热有限微电压源逆变器的基于相位移的不连续PWM方法的研究
1School of Electrical Engineering, China University of Mining and Technology, University Road No.1, Xuzhou 221116, China.
Micromachines
|October 29, 2025
概括
本研究介绍了微逆变器的自适应性不连续脉冲宽度调制 (DPWM) 方法. 它提高了3-6%的效率,并在热量有限的应用中减少了高达50%的切换损失.
科学领域:
- 电气工程 电气工程
- 电力电子 电力电子 电力电子
- 控制系统 控制系统
背景情况:
- 微逆变器对于需要紧尺寸和高效散热的热量有限应用至关重要.
- 传统的不连续脉冲宽度调制 (DPWM) 方法可以提高逆变器的效率,但在不同的功率因子中是次优的.
- 三相电压源逆变器 (3ph-VSI) 面临效率挑战,原因是电机等负载的功率因素变化.
研究的目的:
- 开发一种通用DPWM方法,具有可调节的相位转移角度,以在3ph-VSI中获得最佳效率.
- 在不同运行功率因子下解决固定DPWM方法的局限性.
- 为了提高24V内置微逆变器的效率和减少切换损失,用于苛刻的应用.
主要方法:
- 提出了一种通用DPWM方法,具有可持续调节的相位转移角度.
- 该方法将操作划分为五个功率因子角度间隔,用于自动调节相位转移.
- 同步参考框架相锁循环 (SRF-PLL) 用于实时功率因子计算.
主要成果:
- 拟议的DPWM方法在不同的功率因子中将逆变器效率提高了3-6%.
- 与传统的DPWM方法相比,切换损失减少了40-50%.
- 在24V内置3ph-VSI平台上的实验验证证证了效率提升和动态性能.
结论:
- 适应式DPWM方法为3ph-VSI提供了显著的效率提高和损失减少.
- 这种技术非常适合小型的,受热限制的逆变器.
- 一般化的DPWM方法在各种功率因子中提供最佳性能.
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