Eddy Current Braking Force Analysis of a Water-Cooled Ironless Linear Permanent Magnet Synchronous Motor

1. IntroductionLinear motor performance testing covers a broad range of aspects, with the motor loading test serving as a key component [1]. Traditional testing platforms often encounter problems such as inadequate precision, slow response, and an inability to maintain continuous loading. Nevertheless, the trend is shifting toward the direct loading technique of linear motors, increasingly preferred for its rapid response, contactless transmission, and high accuracy [2,3]. The introduction of Ironless Linear Permanent Magnet Synchronous Motors (ILPMSMs) has further increased the loading precision of testing platforms. Although these motors have reduced thrust density due to the absence of iron cores in their primary coils, their non-cogging and low thrust fluctuation attributes make them ideal for high-precision, non-positioning systems [4].Increasing the thrust density of ILPMSMs requires amplifying the current in the primary winding. This elevation in current leads to a greater deman...