Analysis of starting and synchronization process for line start IPM motors
This paper presents an improved analytical method for determining the synchronizing capability of a line start interior permanent magnet (IPM) synchronous motor. Approximate solution techniques based on average torque analysis for determining the critical slip and maximum inertia are also presented. A dynamic d-q axis model of the motor is developed to investigate the run-up response as well as synchronization capability of line start IPM synchronous motors. The start-up and synchronization performances of a 1hp 208V 4-pole line start IPM motor for various loads have been obtained using MATLAB. Experimental investigations have been also carried out for the same 1 hp IPM motor and test results are presented to support simulation results.
Synchronization process of permanent magnet synchronous motor from over synchronous speed
This paper presents the results of a numerical analysis of the process of synchronizing a medium-power permanent magnet synchronous motor. The investigated motor has a switchable stator winding whereby the number of stator field poles can be changed and (two-stage) starting to a speed higher than the rated one and synchronization from a supersynchronous speed can be effected. The numerical analysis of the synchronization process was carried out using a field-circuit model of the motor.
Dynamic Performance Analysis of Permanet Magnet Synchronous Motors Magnet Synchronous Motors
Unlike conventional synchronous motors, a permanent magnet motor develops considerable break torque during its asynchronous mode of operation. An accurate prediction of the run-up characteristics of these motors is quite important. This paper presents the results of digital computer simulation of the transient performance of P.M. synchronous motors. This is achieved by the numerical solution of the machine dynamic equations including the effects of saturation. A discussion is provided to show the influence of various design parameters on the motor dynamic performances. Finally test results are included also to show the close agreement between calculated and measured results.