电子元件与材料2026，Vol.45Issue(5)：541-548,8.DOI:10.14106/j.cnki.1001-2028.2026.1509
一种面向电机驱动的全模拟SPWM波产生电路
An all-analog SPWM wave generation circuit for motor drive
摘要
Abstract
To address the low integration and poor compatibility with motor-driven H-bridges caused by the reliance of existing SPWM wave generation circuits on digital control units,an all-analog integrated SPWM wave generation circuit was designed.An 8-segment linear DAC was adopted as the core of sine wave synthesis,and a quarter-period sine wave was achieved through 256-step fine approximation,combined with a logic selection circuit to complete the sine wave output.A programmable capacitor array was used to adjust the peak value of the triangular wave,and a high-speed comparator was employed to compare the sine wave with the triangular wave in real time to generate the SPWM wave.The circuit was designed using a 0.18 μm BCD process,and the test results showed that the sine wave step error was less than±0.5%,the triangular wave peak adjustment linearity error was less than±1.2%,and the SPWM wave duty cycle error was less than 1.05%.This circuit solves the pain points of difficult integration and response lag in traditional schemes,and provides key technical supports for the monolithic integration of high-performance motor-driven chips.关键词
SPWM波生成/DAC线性拟合/电机驱动/模拟集成Key words
SPWM wave generation/DAC linear fitting/motor drive/analog integration分类
信息技术与安全科学引用本文复制引用
孟凯,孙江,薛茜芊,易运恒,彭文辉..一种面向电机驱动的全模拟SPWM波产生电路[J].电子元件与材料,2026,45(5):541-548,8.基金项目
国家重点研发计划(2023YFB3210200) （2023YFB3210200）
