Experimental Cooling Study Of The Synchronous Permanent-magnet Plane Motor

Recently, in order to meet the demands of high precision and ultra-precisionpositioning technology, a plane-driven device with high-speed and accurate and precisemachine appears, which is called plane motor. Relative to the rotary motor, planarmotor is an open field, which need more power to produce the necessary moving thrust.Thus, there will need higher power consumption when the motor working. This willlead to significantly temperature rise of motor parts and environment, resulting in thefluctuations of thrust and inaccurately positioning, as well as bring down the life andreliability of the motor. Therefore, the design of the cooling system is an importantguarantee for the planar motor.In this paper, various thermal solutions were analyzed to find a proper coolingmethod for the cooling of a moving-coil planar motor, based on the institutionalcharacteristics of the plane motors. According to the design limits of heat sink, anindirectly liquid cooling was chosen for planar motor, and two different water-cooledheat sinks were designed. Simulation of the cooling effect of the heat sink, usingthermal analysis software Icepak was performed to analyze the flow and heat transfercharacteristics of the working fluid. Then the heat sinks were processed andexperiments were designed to study the cooling of coil sets of the plane motor. Thewater tank, the governor pump and sensors in the experimental system were selectedbased on the calculation of the heat sinks, building a performance testing platform ofheat sink. Finally, using pure water as working fluid, the performances of two differentheat sinks were tested. The flow characteristics and heat transfer performance of heatsinks at different conditions were obtained. The simulation results and experimentalresults were compared under the same boundary conditions in experiments. Thesimulation results are in good agreement with the experimental results.Finally, MATLAB software was used to optimize the channel size of the heat sink.Then flow channel structure of heat sink was modified. The optimized heat sinkimproved the uniformity of the coil upper surface temperature. The maximumtemperature rise of the coil upper surface is1.97℃, which meet the demand that the temperature rise does not exceed2℃. Meanwhile, the pressure loss of within the flowchannel of the heat sink was reduced dramatically, providing a reference for thesubsequent heat sink design and optimization for the plane motor.