Ironically , in many cases the program may not care to even check the outcome of the select into and the condition handlers work was in vain 具有諷刺意味的是,在許多情況下,程序甚至可能不在乎檢查select into的結(jié)果是什么,因此,條件處理程序的工作是徒勞的。
As the 3d electromagnetic field calculation region of the tfpm is not suitable for the periodic condition , the calculation must be done for the whole region . it takes too much time . firstly , a method is adopted to simplify the 3d model with periodic condition 本文的工作主要包括以下幾部分內(nèi)容:首先對(duì)本文研究的橫向磁通電機(jī)的三維電磁場(chǎng)分析模型進(jìn)行了簡(jiǎn)化,提出了對(duì)不符合周期條件的求解區(qū)域在工程設(shè)計(jì)允許的范圍內(nèi)進(jìn)行簡(jiǎn)化處理的方法,同時(shí)對(duì)商業(yè)軟件進(jìn)行了二次開(kāi)發(fā),編制了周期條件處理程序,減少了三維電磁場(chǎng)計(jì)算時(shí)間。