高压直流航空燃油泵电机堵转故障检测与应急控制技术研究

针对航空燃油泵用无刷直流电机(BLDCM)发生堵转故障现象，从故障原因、故障检测技术、故障严重程度、故障可控性及故障影响范围出发进行深入的研究，旨在提出并验证一种工程上可用的BLDCM故障检测方法与故障应急控制机制。针对BLDCM发生堵转时与堵转后的运行工况，设计了一套基于BLDCM转速和母线电流的故障检测与应急控制机制；完成了对BLDCM堵转故障检测及应急控制机制仿真。借助已有的燃油泵用BLDCM试验台，完成BLDCM堵转故障条件下的故障检测与应急控制机制验证。在传统的堵转故障停机保护基础上，针对BLDCM运行过程中堵转故障发生的几率和消失的先后，设计了一种降低PWM占空比延时重启的堵转故障应急控制机制，提高了堵转故障后系统的生存能力，降低了虚警率。结果具有技术成熟度和工程应用价值。

Research on High Voltage DC Aircraft Fuel Pump Motor Blockage Fault Detection and Emergency Control Technology

The brushless direct current motor (BLDCM) for aviation fuel pump has the blockage rotor failure fault phenomena. The fault factors, detecting technologies, and severity, controllability and impact areas are analyzed, and a method of fault detection and emergency control mechanism for BLDCM is designed. Then, for the operating condition of the BLDCM during and after blockage, a method of fault detection and emergency control mechanisms based on the BLDCM speed and bus current is designed and the simulations are completed. With the help of the existed BLDCM test bench for fuel pump, the fault detection and emergency control mechanism verification under the condition of the BLDCM blockage failure are completed. Based on the traditional stoppage protection, an emergency control mechanism of blockage failure which reduces the PWM duty cycle and delayed restart is designed according to the occurrence probability and disappearance sequence of the blockage failure in the BLDCM operation process. The control mechanism improves the survival ability of the system after blockage failure and reduces the false alarm rate. The results have technical maturity and provide engineering application value.