Performance analysis of permanent magnet synchronous motors. II. Operation from variable source and transient characteristics

For pt.I see ibid., vol.5, no.2, p.366-73 (1990). A comprehensive analysis of the transient performance of a permanent magnet (PM) synchronous motor operating from a variable source is described. Internal damping is modeled, and optimum values of design parameters which improve transient performance are obtained. The effects of varying the supply voltage and frequency on the optimum values of these parameters are demonstrated. Simulated nonlinear response to a load change and starting performance are discussed. The results illustrate that significant improvement in transient performance can be achieved over a wide range of voltage and frequencies when some parameters are properly chosen