| 摘要 |
A variable capacitance machine has at least one phase comprising members 31,32 with dielectric material between them and having electrodes 33,34. Relative movement between members 31,32 varies the capacitance between the electrodes 33,34 and the space between them contains a conductive dielectric material 35. The dielectric can be a fluid such as water or an elastomeric material such as gel or a deformable solid such as an acetal co-polymer. There can be multiple separately energised phases (fig 8) and multiple electrodes on one or both members. Electrodes can move relatively linearly or angularly. The dielectric material 35 in the space can have a higher permittivity than either of dielectric materials 36,37 carried by the respective electrodes. The dielectric materials carried by the electrodes can be insulators such as polyimide or mica. The machine can function as a generator or motor and a switched voltage can be applied to the electrodes, such as an alternating voltage having a period less than the dielectric charge migration time constant. |
