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一种增强型PWM电路设计
电子技术应用
刘满丽,郭建,强小燕
中国电子科技集团公司第五十八研究所
摘要: 增强型PWM(ePWM)支持高分辨率占空比动态调整,广泛应用于电机控制、光伏逆变器等领域。设计了一款ePWM电路,基于微边沿定位(MEP)逻辑实现分辨率约为150 ps的脉宽调制,且内有自检诊断模式能够动态地、实时地测量出MEP逻辑在工作时最佳运行状况。该电路已成功应用于多款芯片的研制,可以实现对各种设备的精准控制和调节,提高系统的稳定性和可靠性。
中图分类号:TP391 文献标志码:A DOI: 10.16157/j.issn.0258-7998.257541
中文引用格式: 刘满丽,郭建,强小燕. 一种增强型PWM电路设计[J]. 电子技术应用,2026,52(10):50-53.
英文引用格式: Liu Manli,Guo Jian,Qiang Xiaoyang. An enhanced PWM circuit design[J]. Application of Electronic Technique,2026,52(10):50-53.
An enhanced PWM circuit design
Liu Manli,Guo Jian,Qiang Xiaoyang
No.58 Research Institute of China Electronics Technology Group Corporation
Abstract: Enhanced PWM (ePWM) supports high-resolution dynamic adjustment of duty cycle and is widely used in fields such as motor control and photovoltaic inverters. This paper designs an ePWM circuit that achieves pulse-width modulation with a resolution of approximately 150 picoseconds (ps) based on Micro-Edge Positioning (MEP) logic. Additionally, the circuit incorporates a built-in self-test and diagnosis mode, which enables dynamic and real-time measurement of the optimal operating conditions of the MEP logic during operation. Having been successfully applied in the development of multiple chip models, this circuit can realize precise control and regulation of various devices, thereby enhancing the stability and reliability of the system.
Key words : PWM;high resolution;MEP;self-test and diagnosis

引言

随着社会的发展,电气智能化技术不断升级,尤其新能源汽车产业对电机控制要求越来越高[1-2]。其中ePWM在现代汽车中已成为电控系统的“脉搏发生器”,具有高效能、高集成和高可靠等特点[3-4]。在汽车电子中通过ePWM数字信号控制功率器件,实现高效能量转换与动态响应,其应用覆盖驱动、控制、传感等核心系统,因此对高分辨率PWM的研究变得十分迫切[5-7]。本文设计的ePWM电路支持高分辨率占空比动态调整,由时钟分频模块、PWM信号产生模块、高分辨率模块和校准模块4个关键子模块构成。这些子模块的协同工作确保了PWM信号的精确生成与控制。根据用户需求,各子模块会生成特定的PWM波形,以实现对开关管和开关电路的控制。


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作者信息:

刘满丽,郭建,强小燕

(中国电子科技集团公司第五十八研究所,江苏 无锡 214072)

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