The authors have studied the motion mechanism of the magnetic fluid in a reciprocating seal gap,on the basis of which the authors obtain an anti pressure formula of the reciprocating shaft magnetic fluid seal from gen...The authors have studied the motion mechanism of the magnetic fluid in a reciprocating seal gap,on the basis of which the authors obtain an anti pressure formula of the reciprocating shaft magnetic fluid seal from general Navier Stokes equation.In order to verify the correctness of the anti pressure formula,the authors have calculated the magnetic field distribution of seal structure and have gotten the maximum still anti pressure.Finally,the authors have verified the influence of speed and stroke on the seal anti pressure.展开更多
为尽可能避免动力电池在使用过程中出现过度充放电从而缩短使用寿命的问题,提出限流均衡和混合均衡相结合的动力电池主动均衡控制策略,建立主动均衡控制仿真模型,分别进行限流均衡、混合均衡及两种均衡策略对比的仿真分析,结果表明:提...为尽可能避免动力电池在使用过程中出现过度充放电从而缩短使用寿命的问题,提出限流均衡和混合均衡相结合的动力电池主动均衡控制策略,建立主动均衡控制仿真模型,分别进行限流均衡、混合均衡及两种均衡策略对比的仿真分析,结果表明:提出的主动均衡控制方法能有效避免电池组不一致性问题,很好满足均衡控制要求。基于dS P ACE/AutoBox搭建主动均衡控制硬件在环实验系统,分别进行恒流充、放电与变流放电下均衡控制实验,结果表明:主动均衡控制策略在各种工况下都能快速实现电池组的均衡,且有较好的均衡效果。展开更多
基金National Natural Science F oundation of China(No.59705004)
文摘The authors have studied the motion mechanism of the magnetic fluid in a reciprocating seal gap,on the basis of which the authors obtain an anti pressure formula of the reciprocating shaft magnetic fluid seal from general Navier Stokes equation.In order to verify the correctness of the anti pressure formula,the authors have calculated the magnetic field distribution of seal structure and have gotten the maximum still anti pressure.Finally,the authors have verified the influence of speed and stroke on the seal anti pressure.
文摘为尽可能避免动力电池在使用过程中出现过度充放电从而缩短使用寿命的问题,提出限流均衡和混合均衡相结合的动力电池主动均衡控制策略,建立主动均衡控制仿真模型,分别进行限流均衡、混合均衡及两种均衡策略对比的仿真分析,结果表明:提出的主动均衡控制方法能有效避免电池组不一致性问题,很好满足均衡控制要求。基于dS P ACE/AutoBox搭建主动均衡控制硬件在环实验系统,分别进行恒流充、放电与变流放电下均衡控制实验,结果表明:主动均衡控制策略在各种工况下都能快速实现电池组的均衡,且有较好的均衡效果。
