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Air Gap Magnetic Field Of Linear Induction Motor
- Jan 18, 2017 -

Because the core of the linear motor and the winding breaking discontinuities caused by asymmetric impedance of each phase winding of the linear motor, so even if the power supply voltage and three-phase symmetrical, in three-phase windings, the three-phase current can not be symmetrical, so not only have a positive moving magnetic field in the air gap, but also exist the reverse of the mobile field, while in the two end but also the formation of pulsating magnetic field. The reverse magnetic field and pulse magnetic field will cause additional loss, the linear motor thrust and efficiency, the effect is still exist in the secondary, so called static longitudinal end effect of linear motor. When the secondary motion, there is a secondary counter suddenly enter and leave because sometimes caused by the moment when the primary edge effect, called dynamic longitudinal edge effect.

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