An on-chip power-on reset circuit with a brown-out detection capability is implemented in a 0. 18 μm CMOS. A pF-order capacitor is charged with a proportional-to-absolute-temperature （PTAT） current from a bandgap r...An on-chip power-on reset circuit with a brown-out detection capability is implemented in a 0. 18 μm CMOS. A pF-order capacitor is charged with a proportional-to-absolute-temperature （PTAT） current from a bandgap reference with limited loop bandwidth and slow start-up feature, to generate a reset signal with high robustness and wide-range supply rise time. An embedded brown- out detector based on complementary voltage-to-current （V-to-I） conversion and current comparison can accurately respond to the brown-out event with high robustness over process and temperature when the supply is lower than 1.5 V and the brown-out duration is longer than 0. 1 ms. The presented design with embedded offset voltage cancellation consumes a quiescent current of 8. 5 μA from a 1. 8 V supply and works over ambient temperature of -40° to 120°.展开更多
在复合功率分流混合动力系统中,通过离合器对功率分流装置与动力部件进行离合和制动,可以进一步提高动力性和经济性。传统湿式离合器为适应商用车大扭矩需求,需增加摩擦片数量和体积,导致成本上升和拖曳损失,而机械式离合器虽体积小、...在复合功率分流混合动力系统中,通过离合器对功率分流装置与动力部件进行离合和制动,可以进一步提高动力性和经济性。传统湿式离合器为适应商用车大扭矩需求,需增加摩擦片数量和体积,导致成本上升和拖曳损失,而机械式离合器虽体积小、承载扭矩大,但在超越过程中产生摩擦损失,无法满足混合动力商用车对可控方向锁止和双向非接触自由的需求。设计了一种多模非接触式可控单向离合器,可实现正向锁止、反向锁止以及双向自由三种模式,承载扭矩大同时避免了拖曳和摩擦损失。对多模非接触式可控单向离合器静态和模式切换过程进行了分析,以提高承载扭矩、减小瞬态冲击和实现轻量设计为目标建立了优化模型,提出融合带精英策略的非支配排序遗传算法(Non-dominated sorting genetic algorithmⅡ,NSGA2)、约束有序加权平均算子(Constrained ordered weighted averaging,COWA)和优劣解距离法(Technique for order preference by similarity to ideal solution,TOPSIS)的多目标优化决策方法,与初始方案相比,承载扭矩提升了23.5%、空转角减少了13.7%、关键部件体积减小了0.5%;搭载混合动力专用变速箱进行了台架试验,验证了设计方法的可行性。研究为大扭矩多模非接触式可控单向离合器的设计提供了参考。展开更多
基金Supported by the National Natural Science Foundation of China(6130603761201182)
文摘An on-chip power-on reset circuit with a brown-out detection capability is implemented in a 0. 18 μm CMOS. A pF-order capacitor is charged with a proportional-to-absolute-temperature （PTAT） current from a bandgap reference with limited loop bandwidth and slow start-up feature, to generate a reset signal with high robustness and wide-range supply rise time. An embedded brown- out detector based on complementary voltage-to-current （V-to-I） conversion and current comparison can accurately respond to the brown-out event with high robustness over process and temperature when the supply is lower than 1.5 V and the brown-out duration is longer than 0. 1 ms. The presented design with embedded offset voltage cancellation consumes a quiescent current of 8. 5 μA from a 1. 8 V supply and works over ambient temperature of -40° to 120°.
文摘在复合功率分流混合动力系统中,通过离合器对功率分流装置与动力部件进行离合和制动,可以进一步提高动力性和经济性。传统湿式离合器为适应商用车大扭矩需求,需增加摩擦片数量和体积,导致成本上升和拖曳损失,而机械式离合器虽体积小、承载扭矩大,但在超越过程中产生摩擦损失,无法满足混合动力商用车对可控方向锁止和双向非接触自由的需求。设计了一种多模非接触式可控单向离合器,可实现正向锁止、反向锁止以及双向自由三种模式,承载扭矩大同时避免了拖曳和摩擦损失。对多模非接触式可控单向离合器静态和模式切换过程进行了分析,以提高承载扭矩、减小瞬态冲击和实现轻量设计为目标建立了优化模型,提出融合带精英策略的非支配排序遗传算法(Non-dominated sorting genetic algorithmⅡ,NSGA2)、约束有序加权平均算子(Constrained ordered weighted averaging,COWA)和优劣解距离法(Technique for order preference by similarity to ideal solution,TOPSIS)的多目标优化决策方法,与初始方案相比,承载扭矩提升了23.5%、空转角减少了13.7%、关键部件体积减小了0.5%;搭载混合动力专用变速箱进行了台架试验,验证了设计方法的可行性。研究为大扭矩多模非接触式可控单向离合器的设计提供了参考。
