讨论了静电场中零电势参考点选择的规律和在物理教学中的应用。
The paper mainly discusses what choice systematicness of zero potential reference in electrostatic field.
通过静电学、低频交流、直流等电路实例，质疑了电势零点问题，并对此进行了澄清。
Through electrostatics and examples of low-frequency alternating current and direct-current circuit, the problem of zero potential point is queried and clarified.
对电势零点的选取问题进行了分析，重点论述了电势零点如何选取及所限定的条件。
The problem of choice of zero point of electric potential is analyzed. concentrating on how to choose and the limited conditions.
最后讨论零点不同的电势如何进行叠加。
Eventually, it debates how to superpose the electric potential when the zero point is different.
利用泊松方程（零偏压时耗尽层宽度作为边界条件）积分计算出其电场分布、电势分布等重要结特性。
Some important characteristics, such as build-in electric field distribution, build-in potential distribution were calculated by poisson′equation.
本文采用虚拟中点的方法来识别反电势过零点，然后对过零点进行处理得到无刷电机换向的六个关键位置。
This paper USES "virtual neutral point method" to measure the "zero crossing", then the soft deal "zero crossing" to get the six key position to commutate.
本文采用虚拟中点的方法来识别反电势过零点，然后对过零点进行处理得到无刷电机换向的六个关键位置。
This paper USES "virtual neutral point method" to measure the "zero crossing", then the soft deal "zero crossing" to get the six key position to commutate.
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