文章介绍了一种电动汽车用永磁同步电机的设计方法,其在满足电机牵引特性、热设计和体积限制要求的前提下能实现电机在整车NEDC(new European drive cycle)路谱工况下的效率最优;通过对乘用车NEDC路谱工况下能量消耗点的分布进行分析,...文章介绍了一种电动汽车用永磁同步电机的设计方法,其在满足电机牵引特性、热设计和体积限制要求的前提下能实现电机在整车NEDC(new European drive cycle)路谱工况下的效率最优;通过对乘用车NEDC路谱工况下能量消耗点的分布进行分析,引入能量效率中心点概念,实现在NEDC路谱工况下对电机能耗和效率的快速评估,为电机效率的定向优化设计提供依据;结合电机铜耗和铁耗分配优化技术,分别对基于能量中心点的效率优化方案和传统的额定点效率最优方案进行对比并通过试验,验证了该设计方案的有效性和实用性。展开更多
We study a negative donor center, a neutral donor in a spherical Gaussian potential quantum dot by using the matrix diagonalization of Hamiltonian within the effective-mass approximation. We calculate the energy E（ ...We study a negative donor center, a neutral donor in a spherical Gaussian potential quantum dot by using the matrix diagonalization of Hamiltonian within the effective-mass approximation. We calculate the energy E（ D^-） as functions of Gaussian potential size and depth, the same calculations as performed with the parabolic approximation. The dependence of the ground state of the neutral shallow donor and the negatively charged donor on the dot size and the potential depth is investigated.展开更多
文摘文章介绍了一种电动汽车用永磁同步电机的设计方法,其在满足电机牵引特性、热设计和体积限制要求的前提下能实现电机在整车NEDC(new European drive cycle)路谱工况下的效率最优;通过对乘用车NEDC路谱工况下能量消耗点的分布进行分析,引入能量效率中心点概念,实现在NEDC路谱工况下对电机能耗和效率的快速评估,为电机效率的定向优化设计提供依据;结合电机铜耗和铁耗分配优化技术,分别对基于能量中心点的效率优化方案和传统的额定点效率最优方案进行对比并通过试验,验证了该设计方案的有效性和实用性。
基金The project supported by National Natural Science Foundation of China under Grant No. 10775053
文摘We study a negative donor center, a neutral donor in a spherical Gaussian potential quantum dot by using the matrix diagonalization of Hamiltonian within the effective-mass approximation. We calculate the energy E（ D^-） as functions of Gaussian potential size and depth, the same calculations as performed with the parabolic approximation. The dependence of the ground state of the neutral shallow donor and the negatively charged donor on the dot size and the potential depth is investigated.
