Dynamic performance analyze of swing angle torque permanent magnet motor under different structure and winding parameters
A swing angle torque permanent magnet motor operating mechanism is presented which applied in the high voltage circuit breaker. The motor is a permanent magnet motor with limited angle and only working in the starting stage. Based on the operation requirement of high voltage circuit breaker, the dynamic performance of driving motor operating mechanism is achieved by employing the finite element method. The parameters behavior of driving motor is obtained under the different structure and winding parameters, such as the length to diameter ratio, turns and line width ratio, thickness of permanent magnet, pole arc coefficient, length of air-gap and operating voltage. The results indicate that the motor operating mechanism have a good mechanical characteristics and reach the operation of high voltage circuit breaker.
Parameter optimization of the stator winding process for process capability improvement
A stator mainly consists of stator core and windings. These important components are used to generate the magnetic field for rotating the motor. In stator assembly process, the nonconforming products occurred were mostly due to the stator winding machine, especially when the Direct Current Resistance (DCR) value of each stator was concerned. A preliminary study was carried out to investigate the primary causes. The results showed that the appropriate setting values of the starting and ending positions of winding on the X-axis and the copper wire tension were still unknown. Design of experiment technique was applied to figure out the combination of these parameters that jointly optimize the DCR. Then, these levels were implemented in the winding process and data were collected to evaluate the process capability. The results showed that Cp and Cpk indices had been increased from 1.07 and 0.88 to 1.94, and 1.92, respectively.
The mark of sexual preference in the interpretation of texts: preface to a homosexual reading.
Since reading is an interaction or confrontation between the reader and the text-an interaction that depends upon the background and perspectives of the reader as well as on the text being read-we can assume that the dynamics of sexuality and sexual object choice will influence how readers ascribe meaning to literary texts. In fact, although other aspects of our identities come into play when we read, sexual identity is unique and central because of the role that it plays in the creation of subjectivity. Specifically, male homosexuality informs and structures the reading of texts. But what does it be a homosexual reader or to effectuate a homosexual reading of a particular text?