Patent ID: 7535372
Filing Date: 2009-05-19
Classification: G01R,H02P

Abstract:
1. A method for measuring the operating state of a synchronous motor by using a composite power angle meter, wherein the method comprises the steps of: a. using the composite power angle meter to obtain stator voltage and current signals, a magnetic excitation voltage and current signals, a magnetic excitation adjustment signal and a system voltage signal of the synchronous motor in real time; b. performing internal controlling programs to calculate parameters of the synchronous motor in real time; c. depicting various electric and mechanical model graphs as well as end composite magnetic leakage graph of the synchronous motor, and displaying the graphs on a display; and wherein the steps for depicting images of composite power angle graph of a non-salient-pole synchronous motor are: (1) establishing image coordinates of a composite power angle graph, an electric power angle vector graph, a motor mechanical model graph, a motor mechanical model schematic graph, a synchronous composite power angle graph and a motor end composite magnetic leakage graph of a non-salient-pole synchronous motor as follows: Composite power angle graph: A Electric power angle vector graph: A Motor mechanical model graph: A Motor mechanical model schematic graph: A Synchronous composite power angle graph: A Motor end composite magnetic leakage graph: T wherein the electric power angle vector graph is the power angle vector graph of the non-salient-pole synchronous motor within the electric machine theory; vector vertexes of magnetic excitation potential in the power angle vector graph of the non-salient-pole synchronous motor have the same planar coordinates as points A (2) wherein in a gist of imaging: A Point A Point A wherein the marks move with the moving of the positions of the coordinate points, and the relative positions of the marks and corresponding coordinate points keep constant;