摘要
提出了一种新型的PWM-PSM双模调制技术,通过检测大功率器件驱动信号的占空比来判断系统负载的轻重,从而控制模式间的转换;在降低对取样电路精度要求的同时,有利于实现控制模块的数字化,提高转换效率。另外,为了提高驱动信号的稳定性,采用一个5位的DAC来实现锯齿波信号的数字化,增大噪声容限。仿真结果验证了设计的正确性。该控制方法已经成功应用于一款多功能的集成汽车电子调节器中。
A new PWM-PSM dual-mode modulation technology was proposed, which was based on the detection of the duty cycle of the high power device to estimate the degree of the system load, and then controlled the conversion of the mode. This new sampling method could reduce the stringent demands of sampling circuits to achieve digital control of modulation mode and improve the transfer efficiency. Moreover, a new saw tooth generator was proposed to reduce the sensitivity of driving signal, which used a 5-bit DAC to change the linear slope of the saw tooth signal to step-form. The simulated results verified that this design were valid. This new sampling method and signal steadying strategy had been used in an integrated multifunctional automobile regulator circuit.
出处
《微电子学》
CAS
CSCD
北大核心
2015年第6期751-754,759,共5页
Microelectronics
基金
国家自然科学基金资助项目(61464002)
贵州省重点实验室能力建设项目(黔科合计Z字[2010]4006)
贵州省科学技术基金资助项目(黔科合J字[2014]2067号)
贵州大学博士基金资助项目(贵大人基合字(2013)20号)
