In order to improve the electromagnetic compatibility of powertrain control module （PCM）, a system procedure of vehicular PCM electromagnetic alteration is presented in this paper. First of all, the box of the PCM i...In order to improve the electromagnetic compatibility of powertrain control module （PCM）, a system procedure of vehicular PCM electromagnetic alteration is presented in this paper. First of all, the box of the PCM is divided into different cabins to eliminate interferences between power supply circuit, analog circuit and digital circuit. Secondly, the working principle and electromagnetic （EM） characters of all the signals adopted by a typical PCM are analyzed. Then according to specific electromagnetic characters, different measures are adopted in corresponding signal process circuits or signal transfer cables, such as ground layout designing, power supply protecting, signal shielding and drive cable interference suppressing. Finally, further improvement may also needed regarding to practical electromagnetic compatibility test effects. The final test shows that, with all the measures mentioned above, the conducted emission of a PCM can be reduced by 20 dB; meanwhile, the radiated emission can be reduced by 30 dB comparing to the original system.展开更多
Electromagnetic relay is a widely used apparatus which usually works in a magnetic disturbance environment. To evaluate its electromagnetic compatibility (EMC) in a static magnetic field, dynamic characteristics of a ...Electromagnetic relay is a widely used apparatus which usually works in a magnetic disturbance environment. To evaluate its electromagnetic compatibility (EMC) in a static magnetic field, dynamic characteristics of a clapper relay in a uniform static magnetic field situation based on the finite element method (FEM) is studied. Influences of the magnetic field on dynamic parameters (delay time, pick-up time, end pressure, and final velocity) as well as a situation in which the relay cannot function normally are analyzed. Simulation reveals that the external magnetic field which weakens the relay’s air-gap field has a greater influence on the relay’s dynamic parameters than the one strengthening the field. The validity of the simulation is verified by measured results of coil current and armature displacement.展开更多
为解决商用车在行驶过程中,传统的液压助力转向系统阻力较大且效率较低,并且在长期使用后保养不当容易泄露,可能引起事故等问题,对电动辅助转向电机控制算法和设计进行了研究。电动辅助转向电机选择永磁同步电机,通过应用模糊PID(Propor...为解决商用车在行驶过程中,传统的液压助力转向系统阻力较大且效率较低,并且在长期使用后保养不当容易泄露,可能引起事故等问题,对电动辅助转向电机控制算法和设计进行了研究。电动辅助转向电机选择永磁同步电机,通过应用模糊PID(Proportional Integral Derivative)算法可以精确,快速地调制到参考值。同时采用拓展卡尔曼滤波器可以估算永磁同步电机的转子位置,减小控制器的体积及成本。在驱动系统中,由于大电流耦合路径多样严重影响电机控制系统的电磁兼容性能,所以电机控制时采用驱动系统EMC(Electro Magnetic Compatibility)设计。实验结果表明,基于模糊PID算法以及拓展卡尔曼滤波器的永磁同步电机控制可以应用于商用车电动辅助转向电机控制中。展开更多
It is urgent to solve various problems in electromagnetic （EM） engineering under the increasingly complicated environment. Some expert systems （ES） come into being just to keep up with the demand for solving these...It is urgent to solve various problems in electromagnetic （EM） engineering under the increasingly complicated environment. Some expert systems （ES） come into being just to keep up with the demand for solving these problems. Combined with the analysis of development orES technology and the development trend of EM engineering software in recent years, the application orES technology in EM engineering is discussed, and especially the progress of complete ES in electromagnetic compatible （EMC） is introduced.展开更多
基金Sponsored by the Ministerial Level Foundation(10660060220)
文摘In order to improve the electromagnetic compatibility of powertrain control module （PCM）, a system procedure of vehicular PCM electromagnetic alteration is presented in this paper. First of all, the box of the PCM is divided into different cabins to eliminate interferences between power supply circuit, analog circuit and digital circuit. Secondly, the working principle and electromagnetic （EM） characters of all the signals adopted by a typical PCM are analyzed. Then according to specific electromagnetic characters, different measures are adopted in corresponding signal process circuits or signal transfer cables, such as ground layout designing, power supply protecting, signal shielding and drive cable interference suppressing. Finally, further improvement may also needed regarding to practical electromagnetic compatibility test effects. The final test shows that, with all the measures mentioned above, the conducted emission of a PCM can be reduced by 20 dB; meanwhile, the radiated emission can be reduced by 30 dB comparing to the original system.
基金Project (No. 513230502) supported by the PLA General ArmamentDepartment of China
文摘Electromagnetic relay is a widely used apparatus which usually works in a magnetic disturbance environment. To evaluate its electromagnetic compatibility (EMC) in a static magnetic field, dynamic characteristics of a clapper relay in a uniform static magnetic field situation based on the finite element method (FEM) is studied. Influences of the magnetic field on dynamic parameters (delay time, pick-up time, end pressure, and final velocity) as well as a situation in which the relay cannot function normally are analyzed. Simulation reveals that the external magnetic field which weakens the relay’s air-gap field has a greater influence on the relay’s dynamic parameters than the one strengthening the field. The validity of the simulation is verified by measured results of coil current and armature displacement.
文摘为解决商用车在行驶过程中,传统的液压助力转向系统阻力较大且效率较低,并且在长期使用后保养不当容易泄露,可能引起事故等问题,对电动辅助转向电机控制算法和设计进行了研究。电动辅助转向电机选择永磁同步电机,通过应用模糊PID(Proportional Integral Derivative)算法可以精确,快速地调制到参考值。同时采用拓展卡尔曼滤波器可以估算永磁同步电机的转子位置,减小控制器的体积及成本。在驱动系统中,由于大电流耦合路径多样严重影响电机控制系统的电磁兼容性能,所以电机控制时采用驱动系统EMC(Electro Magnetic Compatibility)设计。实验结果表明,基于模糊PID算法以及拓展卡尔曼滤波器的永磁同步电机控制可以应用于商用车电动辅助转向电机控制中。
基金the Key Project of Chinese Ministry of Education (No. 104166)
文摘It is urgent to solve various problems in electromagnetic （EM） engineering under the increasingly complicated environment. Some expert systems （ES） come into being just to keep up with the demand for solving these problems. Combined with the analysis of development orES technology and the development trend of EM engineering software in recent years, the application orES technology in EM engineering is discussed, and especially the progress of complete ES in electromagnetic compatible （EMC） is introduced.
