CAJ | 학술논문

作为电机驱动系统中的控制指令载体,PWM 波的信号完整性影响整个系统的可靠性和任务完成能力,但是国内外的相关研究报道却很少。为了提高 PWM 波在传输过程中的信号完整性,设计了一种新型 PWM 波的故障保护与诊断电路。其通过将 DSP 输出的 PWM 波与经过驱动芯片处理后的信号进行一系列逻辑操作,并利用硬件电路设定判定阈值,若两波形不符合度大于设定阈值则禁止 PWM 波的输出。试验证明,当 PWM 波在传输过程中发生突变或较大延迟时,该电路能够及时诊断出故障,并将故障部分进行隔离,起到了保护功率器件的作用,提高了电机驱动系统的可靠性。
작위전궤구동계통중적공제지령재체,PWM 파적신호완정성영향정개계통적가고성화임무완성능력,단시국내외적상관연구보도각흔소。위료제고 PWM 파재전수과정중적신호완정성,설계료일충신형 PWM 파적고장보호여진단전로。기통과장 DSP 수출적 PWM 파여경과구동심편처리후적신호진행일계렬라집조작,병이용경건전로설정판정역치,약량파형불부합도대우설정역치칙금지 PWM 파적수출。시험증명,당 PWM 파재전수과정중발생돌변혹교대연지시,해전로능구급시진단출고장,병장고장부분진행격리,기도료보호공솔기건적작용,제고료전궤구동계통적가고성。
As a command carrier of the motor-driven system,signal integrity of PWM has impacts on reliability and ability to fulfill tasks for the whole system.However,there few research report at home and abroad.A new-type circuit of fault protection and diagnosis is proposed for improving the signal integrity of PWM during transmission.A series of logical operations are to deal with PWM from DSP and signals modulated by drivers in this circuit.And decision thresholds are set up by hardware circuits,the PWM output is inhibited when non-coincidence value between the two signals is larger than decision thresholds.It is verified by experiments that,this circuit can be able to diagnose faults in time,and parts of fault can be insulated,if a sudden change or big delay occurs during PWM transmission.So that it plays a protective role for power devices,and the reliability of the motor-driven system is improved.