根据下面你所提供的参考文献的两段文章，你说的“庞加莱在100多年前看到的小漏洞”可能就是庞加莱所说的“位移电流理论的一个缺点”。庞加莱没说过：“...位移电流...可以推动自由电子运动，使电子获得能量，但是反过来，运动的电子...不能对位移电流有任何影响，....于是能量就不守恒了。”
http://www.hitesla.org/ShowPost.asp?ThreadID=444
值得指出，虽然 Maxwell 用位移电流概念成功地解释了电容器电路中的电流连续性的问题，并预言了电磁波的存在，但他错误地把电磁位的瞬时解（Instantaneous vector potential）作为电磁场以无穷大速度传播的理论依据，以致位移电流概念受到质疑。
谢谢你提供的参考文献。
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Lorentz himself, whowas very familiar with Poincar´e’s publications and who used retarded potentials from 1902 in his theory, stated pointedly in 1906 that ‘an electromagnetic field in the ether is never produced by any other causes than the presence and motion of electrons’. In Lorentz theory all fields—bound electric and magnetic and free radiation fields—are generated by charges: contrary to J J Thomson, changing electric fields do not generate magnetic fields. （意思：劳伦兹认为电磁场只能由电荷产生，改变电场不能产生磁场。）
In 1901 Poincar´e found another weakness in displacement current theory. He showed that when the displacement current is acted on by a magnetic field it ‘does not experience any mechanical action according to the theory of Lorentz’. Although the displacement current neither produces a magnetic field nor is affected by a magnetic field in Lorentz electromagnetism, it remained a physical reality for both Poincar´e and Lorentz as a process in the ether equivalent to light and as contributing to the closure of currents in an open circuit. （意思：按劳伦兹理论，庞加莱发现位移电流理论的另一个缺点：位移电流不产生磁场，位移电流和生磁场之间没有互作用。）
John Roche,“The present status of Maxwell's displacement current,” Eur. J. Phys. 19,155 (1998). http://128.112.100.2/~kirkmcd/examples/EM/roche_ejp_19_155_98.pdf
http://www.hitesla.org/ShowPost.asp?ThreadID=444
值得指出，虽然 Maxwell 用位移电流概念成功地解释了电容器电路中的电流连续性的问题，并预言了电磁波的存在，但他错误地把电磁位的瞬时解（Instantaneous vector potential）作为电磁场以无穷大速度传播的理论依据，以致位移电流概念受到质疑。
谢谢你提供的参考文献。
---------------------------------------------------------------
Lorentz himself, whowas very familiar with Poincar´e’s publications and who used retarded potentials from 1902 in his theory, stated pointedly in 1906 that ‘an electromagnetic field in the ether is never produced by any other causes than the presence and motion of electrons’. In Lorentz theory all fields—bound electric and magnetic and free radiation fields—are generated by charges: contrary to J J Thomson, changing electric fields do not generate magnetic fields. （意思：劳伦兹认为电磁场只能由电荷产生，改变电场不能产生磁场。）
In 1901 Poincar´e found another weakness in displacement current theory. He showed that when the displacement current is acted on by a magnetic field it ‘does not experience any mechanical action according to the theory of Lorentz’. Although the displacement current neither produces a magnetic field nor is affected by a magnetic field in Lorentz electromagnetism, it remained a physical reality for both Poincar´e and Lorentz as a process in the ether equivalent to light and as contributing to the closure of currents in an open circuit. （意思：按劳伦兹理论，庞加莱发现位移电流理论的另一个缺点：位移电流不产生磁场，位移电流和生磁场之间没有互作用。）
John Roche,“The present status of Maxwell's displacement current,” Eur. J. Phys. 19,155 (1998). http://128.112.100.2/~kirkmcd/examples/EM/roche_ejp_19_155_98.pdf
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