| 摘要 |
The invention discloses a method for evaluation of switched reluctance motor system reliability through quantitative analysis of three-level Markov model. Through analysis of the operating condition of switched reluctance motor drive system under first-level faults, second-level faults and third-level faults, 4 valid states and 1 invalid state under first-level faults, 14 valid states and 4 invalid states under second-level faults, and 43 valid states and 14 invalid states under third-level faults are obtained. If initial normal state and final invalid state are also considered, a three-level Markov model will have 62 valid states and 20 invalid states in total. A state transition diagram of the switched reluctance motor drive system under three-level faults is established, a state transition matrix is obtained, a probability matrix P(t) of the system in valid states is attained, the sum of all elements of the probability matrix P(t) in valid states is calculated, and MTTF is obtained from reliability function R(t) through calculation, thereby realizing evaluation of switched reluctance motor system reliability through quantitative analysis of a three-level Markov model. The method has a desirable engineering application value. |
