| Contact pressure and temperature are key factors that greatly influence on the performance of brakes. A finite element model is built based on the special component of a new electric brake. Then the finite element method is used to analyze the magnetic field, contact pressure and temperature of electric brake.Considering the magnetic contact between the electromagnet and the iron plate, the magnetic flux density in the electromagnet is studied with ANSYS. Then the electromagnetic force at different air gap is calculated and the relationship between electromagnetic force and air gap is drawn. And it is predicted that the electromagnetic force in the whole electromagnet is symmetrical in the front-rear direction and unsymmetrical in the left-right direction.Contact pressure between electromagnet and iron plate, and contact pressure between brake lining and drum is studied. Because of the difference of materials for a electromagnet body, the contact pressure on the bottom of iron core and the up-shell is larger than that on the bottom of friction material. The stableness of electromagnet is studied and the conclusion is drawn. Due to the balanced torque, the electromagnet is stable in the brake process.Considering the heat generation, the convection of air flow and the distribution of heat flux between the contact pair, a thermal analysis model for brake is established. Because the contact pressure of the contact pair and the temperature field of brake are in a coupled relationship, a coupled-field method is used to analyze the transient temperature field of brake.The analysis results of down-hill process are verified with the infrared images taken with the infrared camera.The results make a good foundation to the further study on the performance analysis and the structure optimization to the brake.
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