Rearch on Implementation and Fault Diagnosis of Doubly Salient Starter/Generator Control System

　　Rearch on Implementation and Fault Diagnosis of Doubly Salient Starter/Generator Control System
　　The technology of starter/generator is an important direction of the development of motor and power generation technology. Doubly Salient Electro-magnet Machine is a new type Machine that derived from Doubly Salient Permanent-magnet Machine, it inherited the advantages of simple structure, high reliability and being fit to high speed operation from DSPM. In the mean time, the problems of voltage regulating and eliminating magnetism under fault state were solved owing to the advent of DSEM. DSES/G and DSEG have begun to be researched to use in aero and Block Ceramic Magnets wind power generation field. Then the demand of its reliability is promoted. However, once the weakest part of the system such as main power converter is in fault, it may bring serious consequence.
　　So the key to improving the system reliability is failures detection and on-line diagnosis.This paper introduces the structure, magnetic characteristics and mathematic model of DSEM firstly, and then analyzes integral working principle of DSES/G. Finally the characteristics of DSES/G are summarized.DSES/G system implementation is an important step of subject research, this paper establishes experiment platform based on DSP+CPLD after completing system model simulation, and proves the validity of the system by experiment research, finally designs the display interface by using virtual instrument LabVIEW.In order to better diagnosing fault of the weakest part of the system, this paper does simulation research firstly, analyzes the situation and impact to the system after different faults. These researches provide theoretical guidance to the on-line fault diagnosis.This paper finally http://www.chinamagnets.biz/Ceramic/Block-Ceramic-Magnets.php implements on-line fault diagnosis of converter which is the weakest link of the system in starting process and generating process. In starting process, a new method implements open-circuit on-line fault diagnosis through opening un-work arm bridge’s MOSFET by software, and implements open-circuit and short-circuit on-line fault diagnosis through changing the position of current sensor by hardware. In generating process, this paper uses wavelet analysis which has strong analytical capabilities to non-symmetric cycle signal and combines virtual instrument LabVIEW to implementing on-line fault diagnosis of diodes.