Thermal characteristic of double-side tabular permanent magnet linear synchronous motor in different working models

Double-side tabular permanent magnet linear synchronous motors (PMLSM), which is incorporated with high power pulse technology, so as to be high power pulsed-PMLSM (PP-PMLSM), is mainly applied in the aspect of short-term acceleration. Under large current, the motor generates high instantaneous thrust and accelerates the load immediately to the expected velocity. The high winding current density and large loss of the motor brings about the issue of fast temperature rise. Meanwhile, the temperature rise is not only correlated with the loss, but also the motor working modes. According to the principles of heat transfer, this paper establishes the numerical model of the two-dimensional (2D) primary transient temperature field, and the basic assumptions and boundary conditions are then provided. Furthermore, under the electromagnetic analysis of the motor, the inner loss and its distribution are researched and identified, which become the discussing foundation of the motor thermal characteristic as follows, under both periodic and short-term continuous working models. Ultimately, the calculating and experimental results furnish the basis of the design and application of double-side tabular PMLSM.