电动汽车功率驱动单元设计

以电动汽车用永磁同步电机为控制对象,介绍了功率驱动单元的设计方法,包括基本结构、功率器件的选取及其驱动电路设计,以及保护电路的结构和参数设计;该方法选用MOSFET作为功率器件,降低了功率驱动单元设计的成本;采用的保护电路设计方法从参数设计入手,并通过电路布局的优化,极大地降低了MOSFET漏极和源极间dudt引发的干扰,提高了功率驱动单元的性能;应用结果表明,采用该方法设计的功率驱动单元性能优良,已成功应用于电动汽车驱动系统中。

Design of Power Driver Unit Used for Electric Vehicles

For the Permanent Magnet Synchronous Motor in electric vehicles,the design method of power driver unit is introduced,including the topology structure,the electronic components selection,the driver circuit design,the protect circuits structure and their parameters.In this method,MOSFET is selected as power components to decrease the system cost.Through the parameter design and improvement of circuits layout,the design method of protect circuits decreases the disturbance generated by dudt and improves the performance of power driver unit.The application result shows that the performance of the power driver unit is well and has been used in the driving system of the electric vehicles successfully.