Production method of despinning acceleration magnetic field for low-speed spinning spatial unmagnetized metal debris

The invention relates to a production method of a despinning acceleration magnetic field for low-speed spinning spatial unmagnetized metal debris. According to the magnetic field setting method, the variable magnetic field is applied in the direction orthogonal with a constant despinning magnetic field, thus, eddy currents are generated inside debris conductors and act together with eddy currents generated by debris spinning motion under the action of the constant magnetic field, the eddy current effect in the low-speed spinning debris is improved, the despinning torque under the action of the constant magnetic field is increased, and the despinning time of the debris is shortened. Compared with the prior art, the method has the following advantages that the variable magnetic field is used for generating the eddy currents superimposed on the eddy currents generated by the spinning motion of the unmagnetized metal debris in the magnetic field, the despinning torque is generated, the energy transfer efficiency is improved, the despinning torque is increased, and the despinning time is shortened.