| 摘要 |
<p>A method for controlling and dissipating harmful plasma in industrial production and a motive magnetic filed generating device are disclosed. The motive magnetic field described means a magnetic field that continuously moves in relation with the above plasma. This relative motion includes rotating motion, linear motion and the combination of these two motions. The key point of the invention is to make the motive magnetic field interact with the plasma and thus cause the plasma to rotate or linearly move under the motive magnetic field, so as to achieve an object for controlling and dissipating the plasma. When the invention applies in the technical field of laser welding, it may avoid the disadvantage of blowing off a protective gas. When carrying on a laser anatexis welding, a rotating magnetic field may rotate a liquid metal in a melting bath and squeeze the metal around, thus increasing the working depth of the laser beam. The method and device of the invention also may apply to dissipate the plasma (electric arc) in circuit breaker of circuit system and the plasma in a gas laser.</p> |
