以设计输出电流为800mA的高稳定线性稳压器(low-dropout voltage regulator,LDO)为目标,利用工作在线性区的MOS管具有压控电阻特性,构造零点跟踪电路以抵消随输出电流变化的极点,并且采用了改进型米勒补偿方案使电路系统具有60°的...以设计输出电流为800mA的高稳定线性稳压器(low-dropout voltage regulator,LDO)为目标,利用工作在线性区的MOS管具有压控电阻特性,构造零点跟踪电路以抵消随输出电流变化的极点,并且采用了改进型米勒补偿方案使电路系统具有60°的相位裕度,达到了大输出电流下的高稳定性要求.另外,分析了电路在转换发生时电路结构参数和负载整流特性的关系,提出了一种能在瞬间提供大电流的转换速率加强电路,达到了在负载电流从800mA到10mA跳变时,输出电压的跳变量控制在60mV以内,并且最长输出电压恢复时间在500μs以内.芯片采用CSMC公司的0.6μm CMOS数模混合信号工艺设计,并经过流片和测试,测试结果验证了设计方案.展开更多
Recent events related to power system failure have shown that voltage collapse can be a cause of widespread outages.The thrust of this paper is to discuss and establish means of mitigating system voltage instability b...Recent events related to power system failure have shown that voltage collapse can be a cause of widespread outages.The thrust of this paper is to discuss and establish means of mitigating system voltage instability by using a combination of both reactive current droop compensation and line drop compensation.It is shown that the point that the voltage regulator controls can be defined by a new method which is based on a widely accepted voltage stability analysis tool.This tool can be used to determine which generators will have an impact on the maximum permissible loading of a bus.Dynamic analysis was carried out on the CIGRE Nordic test system to study the impact of control point location on time to collapse and it is shown that the new scheme can improve the voltage stability.展开更多
提出了一种利用串联有源电压质量调节器(Active Voltage Quality Regulator,简称AVQR)自身的IGBT开关和负载电流信号强迫旁路双向晶闸管(SCR)电子转换开关快速换流的控制方法,实现了对AVQR的快速投入和切除控制,其投入的响应时间小于900...提出了一种利用串联有源电压质量调节器(Active Voltage Quality Regulator,简称AVQR)自身的IGBT开关和负载电流信号强迫旁路双向晶闸管(SCR)电子转换开关快速换流的控制方法,实现了对AVQR的快速投入和切除控制,其投入的响应时间小于900μs,大大提高了AVQR的工作性能。展开更多
文摘以设计输出电流为800mA的高稳定线性稳压器(low-dropout voltage regulator,LDO)为目标,利用工作在线性区的MOS管具有压控电阻特性,构造零点跟踪电路以抵消随输出电流变化的极点,并且采用了改进型米勒补偿方案使电路系统具有60°的相位裕度,达到了大输出电流下的高稳定性要求.另外,分析了电路在转换发生时电路结构参数和负载整流特性的关系,提出了一种能在瞬间提供大电流的转换速率加强电路,达到了在负载电流从800mA到10mA跳变时,输出电压的跳变量控制在60mV以内,并且最长输出电压恢复时间在500μs以内.芯片采用CSMC公司的0.6μm CMOS数模混合信号工艺设计,并经过流片和测试,测试结果验证了设计方案.
基金Project Supported by National Natural Science Foundation of China(50407010)
文摘Recent events related to power system failure have shown that voltage collapse can be a cause of widespread outages.The thrust of this paper is to discuss and establish means of mitigating system voltage instability by using a combination of both reactive current droop compensation and line drop compensation.It is shown that the point that the voltage regulator controls can be defined by a new method which is based on a widely accepted voltage stability analysis tool.This tool can be used to determine which generators will have an impact on the maximum permissible loading of a bus.Dynamic analysis was carried out on the CIGRE Nordic test system to study the impact of control point location on time to collapse and it is shown that the new scheme can improve the voltage stability.
文摘提出了一种利用串联有源电压质量调节器(Active Voltage Quality Regulator,简称AVQR)自身的IGBT开关和负载电流信号强迫旁路双向晶闸管(SCR)电子转换开关快速换流的控制方法,实现了对AVQR的快速投入和切除控制,其投入的响应时间小于900μs,大大提高了AVQR的工作性能。
