The activity of candida Sp lipase(CSL) in catalytic hydrolysis of olive oil has been investigated in W/O reversed micelle of AEOT/isooctane/water system and compared with that of AOT/isooctane/water system. The result...The activity of candida Sp lipase(CSL) in catalytic hydrolysis of olive oil has been investigated in W/O reversed micelle of AEOT/isooctane/water system and compared with that of AOT/isooctane/water system. The results indicated that the activity of lipase in AEOT/isooctane reversed micelles was about 2 times that in AOT/isooctane reversed micelles in the optimum water content(W 0=12) and pH=7.2, and the maximum hydrolysis rate(V max) increased nearly 3 times.展开更多
对内置式永磁同步电机(IPMSM)转子静止初始位置检测技术进行研究,提出一种基于高频信号注入法的高精度IPMSM初始位置检测方法。该方法通过向电机绕组中注入高频旋转电压信号,通过带通滤波器得到高频电流响应,利用同步旋转坐标变换将高...对内置式永磁同步电机(IPMSM)转子静止初始位置检测技术进行研究,提出一种基于高频信号注入法的高精度IPMSM初始位置检测方法。该方法通过向电机绕组中注入高频旋转电压信号,通过带通滤波器得到高频电流响应,利用同步旋转坐标变换将高频电流响应的正、负序分量进行分离;然后分别对三相高频电流正、负序分量的相角进行最小二乘估计,利用任意一相高频电流正、负序分量的相角差提取出转子的位置信息;最后通过磁路饱和效应对转子N、S极性进行辨别。该方法具有较高的检测准确度,平均检测误差约为1.73°电角度,对一台11 k W的内置式永磁同步电机的实验表明了该方法的正确性。展开更多
文摘The activity of candida Sp lipase(CSL) in catalytic hydrolysis of olive oil has been investigated in W/O reversed micelle of AEOT/isooctane/water system and compared with that of AOT/isooctane/water system. The results indicated that the activity of lipase in AEOT/isooctane reversed micelles was about 2 times that in AOT/isooctane reversed micelles in the optimum water content(W 0=12) and pH=7.2, and the maximum hydrolysis rate(V max) increased nearly 3 times.
文摘对内置式永磁同步电机(IPMSM)转子静止初始位置检测技术进行研究,提出一种基于高频信号注入法的高精度IPMSM初始位置检测方法。该方法通过向电机绕组中注入高频旋转电压信号,通过带通滤波器得到高频电流响应,利用同步旋转坐标变换将高频电流响应的正、负序分量进行分离;然后分别对三相高频电流正、负序分量的相角进行最小二乘估计,利用任意一相高频电流正、负序分量的相角差提取出转子的位置信息;最后通过磁路饱和效应对转子N、S极性进行辨别。该方法具有较高的检测准确度,平均检测误差约为1.73°电角度,对一台11 k W的内置式永磁同步电机的实验表明了该方法的正确性。
