Research and manufacture of electromagnetic brake disc on automobile

LONG Yun-mei， LIN Qiu-feng， ZENG Jing， HE Rong-xin，
 PENG Ma-bao， ZENG Wen-gao， CHEN Wei-tao
（Guangzhou College， South China University of Technology， Guangzhou 510800， China）

Abstract： In order to solve the problem of the hydraulic brake system of automobile for its complicate structure， heavy weight and great drain on the resources， the electromagnetic brake technology was applied to the automobiles. After the analysis of disc electromagnetic brake reinforcement structure modeling and stress simulation，the corresponding relationship between the brake pedal travel，current size and braking force was established. A method was presented that taking electromagnetic as the power source and through the reinforcement structure enlarge the electromagnetic force to the expected brake force and drive the friction brake to make the car brake become true. Based on theoretically calculation and experiment，the control of electromagnetic force， ABS performance and the thermal stability of the brake were evaluated. On the solid model， the stability of electromagnetic brake， the varing of the electromagnetic force between the distance of gag bit and iron core， the varing between the current of the electromagnetic loop and the pedal travel were tested. The experimental results show that the electromagnetic force can reach 780 N，the reaction time is only 0.019 6 s， which meet the requirements of automobile brake， the electromagnetic brake system can react faster than the hydraulic brake system， that its structure is more simple and easier for integration and distant control.
Key words： brake system； disc electromagnetic brake； reinforcement structure； electromagnetic force； brake test