| 摘要 |
Two coils, between which a sample is kept in a contactless suspended state, are connected to separate power sources, at least one of which comprises a phase shifter. Both power sources are controlled by a common oscillation generator. If both currents in the coils are in phase, a magnetic dipole-field of high heating capacity is obtained. If the two currents in the coils are in counterphase, a quadrupole-field is obtained, which generates a high positioning force. By modifying the phase difference, it is possible to generate optional superpositions of the dipole-field and the quadrupole-field, whereby the parts of heating capacity and positioning capacity can be varied.
|
