A high thermal conductivity insulation structure for the primary coil of a linear motor for urban rail vehicles

Abstract

The invention discloses a linear motor primary coil high-heat-conduction insulating structure used for an urban rail vehicle. The linear motor primary coil high-heat-conduction insulating structure comprises an insulating structural slot, a magnetic slot wedge, a high-heat-conduction slot insulator, a high-heat-conduction insulating packing strip, high-heat-conduction polyester-glass belts, high-heat-conduction polyimide films, high-heat-conduction mica tapes and electromagnetic wires. On the basis that the insulation performance and the mechanical performance are not lost, the improvement of the heat-conduction coefficient of each part is fully considered for the design of the high-heat-conduction insulating structure, the temperature rise of a linear motor is effectively lowered, the electrical insulation performance, the mechanical performance and the heat resistance are excellent, the high-heat-conduction insulating structure is well compatible with impregnating varnish of systems such as epoxy anhydride, organosilicon and polyester imide, and the linear motor insulating structure is applicable to a CPI technology. By means of reasonable combination design, the heat-conduction coefficient of the linear motor insulating structure is fundamentally improved, and the design requirements and trend of the motor in the future are achieved.

Description

Technical field [0001] The invention relates to the field of motors, in particular to a linear motor primary coil high thermal conductivity insulation structure for urban rail vehicles. Background technique [0002] The installation size of linear motors for urban rail vehicles is strictly limited, requiring compact structure, high power, small size, and light weight. Linear motors generate a large amount of heat due to their high current density, and the local maximum can reach 140°C or even higher. As the key insulation material of linear motors, it is mainly composed of some organic polymer materials (usually adhesives) and inorganic materials (usually mica paper and glass fiber cloth) with low thermal conductivity. The thermal conductivity of the general insulation structure At 0.20~0.25W / mK, the linear motor will prevent heat from dissipating to the core and cooling medium during the operation of the linear motor, resulting in a higher temperature rise of the motor, and a hi...

AI Technical Summary

Problems solved by technology

As the key insulating material for linear motors, it is mainly composed of organic polymer materials (usually adhesives) and inorganic materials (usually mica paper and glass fiber cloth, etc.) with low thermal conductivity. The thermal conductivity of the generally composed insulating structure At 0.20~0.25W / mK, the heat will be prevented from dissipating to the iron core and cooling medium during the operation of the linear motor, resulting in a higher temperature rise of the motor, and a higher working temperature will inevitably cause aging and failure of the insulating material and reduce the electrical performance and mechanical properties, thereby affecting the service life

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