公开(公告)号：US20240345166A1

公开(公告)日：2024-10-17

申请号：US18629865

申请日：2024-04-08

Applicant: Tektronix, Inc.

Inventor： Krishna N H Sri ,  Niranjan R Hegde ,  Christopher J. Loberg ,  Shubha B

IPC: G01R31/34

CPC classification number: G01R31/343

Abstract: A test and measurement instrument includes one or more processors to acquire first, second, and third phase drive signals applied to a three-phase motor. A motor drive analyzer performs a direct-quadrature-zero, DQZ, transformation on the acquired first, second, and third phase drive signals to produce direct (D), quadrature (Q), and zero (Z) components, and generates an overlapped DQ phasor plot illustrating the D and Q components along with frequency domain representations of the D and Q components. The motor driver analyzer displays, on a user interface, the generated overlapped DQ phasor plot and an overlapped DQ spectra plot from the frequency domain representations of the D and Q components to enable a user to detect motor defects through visual characteristics of the overlapped DQ phasor and DQ spectra plots. The motor driver analyzer removes an offset and filters the D and Q components prior generating the overlapped DQ phasor plot.