Study On The Uniformity Of Transverse Magnetic Flux Induction Heating

Transverse magnetic flux induction heating technology(TFIH)has the advantages of high flexibility,low heating frequency,low reactive power and continuous heating in heat treatment of metal plates.With the continuous development of modern machinery manufacturing industry,people have put forward higher requirements for the performance of metal plates,and traditional single-coil structure transverse flux induction heaters are difficult to meet the needs of industrial applications.Therefore,the improvement of single-coil transverse flux induction heaters has attracted much attention.The temperature distribution uniformity at the outlet of the traditional single-coil transverse flux induction heater is poor,which seriously affects the heat treatment effect of metal plate.The concentric double positive hexagonal coil structure transverse flux induction heater including the transmit coil and the external relay coil was designed by using the magnetic coupling resonance mechanism,which improved the uniformity of temperature distribution and improved the quality of heat treatment.According to the "coil projection law",the change of magnetic permeability during heat treatment and the side length of the transmitting coil and relay coil directly affect the uniformity of heating,so this paper studies the magnetic permeability and coil parameters,and finally realizes the uniform distribution of temperature at the outlet of the transverse flux induction heater.In this paper,the impedance characteristics of the traditional single-coil transverse flux induction heater,the circuit topology,the principle of magnetic coupling resonance mechanism and impedance characteristics of the two-coil transverse flux induction heater are analyzed,and the advantages of the uniformity of temperature distribution at the outlet of the two-coil transverse flux induction heater are verified,and the dominant factors affecting the uniformity of temperature distribution at the outlet of the heater are derived.Secondly,for the purpose of achieving uniform heat treatment,the advantages of the transverse magnetic flux induction heater with regular hexagon coil structure are verified through theoretical derivation and magnetic simulation analysis,and the relationship between magnetic permeability and magnetic field strength amplitude and the relationship between the side length of the transmitting coil and the relay coil is obtained.Then,while building the topology in PSIM for simulation,finite element simulation was carried out on the transverse flux induction heater model of double hexagonal coil structure in ANASYS Maxwell,which verified the advantages of uniform heating of the transverse flux induction heater with double hexagon coil structure.Finally,a low-power experimental platform is built to verify the correctness and feasibility of the proposed scheme.