Method and arrangement for monitoring a permanently excited synchronous machine
AssigneeZF Friedrichshafen AG
InventorHassan Lamsahel
Life of this patent
Estimating the term…
Abstract
The present disclosure provides a method for monitoring a rotor position sensor of a PSM machine having at least three phases operated by a field oriented control, where the electrical angle of the PSM machine may corresponds with a rotor position. A first calculation of the electrical angle of the PSM machine may be based on a measured mechanical rotor position and the pole-pair number of the PSM machine. A second calculation of the electrical angle of the PSM machine may be based on the phase of a phase current indicator and regulated target currents in the d,q-coordinate system. The method may include a comparison of the values of the respective electrical angles of the PSM machine determined by the first calculation and the second calculation.
Claims16
A method for monitoring a rotor position sensor of a PSM machine having at least three phases operated by a field oriented control, wherein the electrical angle (Θel) of the PSM machine corresponds with a rotor position, the method comprising:
- a first calculation of the electrical angle (Θel1) of the PSM machine, wherein the first calculation is based on a measured mechanical rotor position and the pole-pair number of the PSM machine;
- a second calculation of the electrical angle (Θel2) of the PSM machine, wherein the second calculation is based on the phase of a phase current indicator and regulated target currents in the d,q-coordinate system;
- and
- a comparison of the values of the respective electrical angles (Θel1, Θel2) of the PSM machine determined by the first calculation and the second calculation.
An assembly for monitoring a PSM machine having at least three phases operated by a field oriented control, the assembly comprising:
- at least one position sensor configured to determine the rotor position (Θmech) of the PSM machine;
- a sampling device for sampling the phase current of at least one of the phases;
- an execution device for performing at least a first calculation and a second calculation, wherein the first calculation and the second calculation independently determine the rotor position of the PSM machine;
- and
- a monitoring device, the monitoring device configured to evaluate errors when a deviation is detected between the determined rotor position as respectively determined by the first calculation and the second calculation.
Dependencies are inferred from the claim text.