Rotor position detection in an electrical machine
First Claim
Patent Images
1. A method of determining error in the output of a rotor position transducer of an electrical machine under test, the method comprising:
- deriving a calibration result for operation of the machine under predetermined conditions, the calibration result being at least a value of at least one parameter of the machine under test;
operating the machine under the predetermined conditions and recording the at least one parameter as a test result; and
comparing the calibration result with the test result to determine an error, and storing the error.
2 Assignments
0 Petitions
Accused Products
Abstract
An electrical machine has a rotor position transducer which provides output signals to a control system. The output signals contain errors due to component shortcomings and manufacturing imperfections. A method is disclosed which is able to determine the errors in the signals by comparison with calibrated data, so as to provide corrections to the control system of the machine. The corrections may be stored in the control system and used to improve the accuracy of the transducer output signals, thus improving the output of the machine.
15 Citations
18 Claims
-
1. A method of determining error in the output of a rotor position transducer of an electrical machine under test, the method comprising:
-
deriving a calibration result for operation of the machine under predetermined conditions, the calibration result being at least a value of at least one parameter of the machine under test; operating the machine under the predetermined conditions and recording the at least one parameter as a test result; and comparing the calibration result with the test result to determine an error, and storing the error. - View Dependent Claims (2, 3, 4, 5, 6, 7, 9, 10, 11)
-
-
8. A method of determining error in the output of a rotor position transducer of an electrical machine under test, the method comprising:
-
deriving a calibration result for operation of the machine under predetermined conditions, the calibration result being at least a value of at least one parameter of the machine under test; operating the machine under the predetermined conditions and recording the at least one parameter as a test result; and comparing the calibration result with the test result; wherein the machine is controlled by a controller, the determined error in the rotor position transducer output being stored in the controller and used to compensate for errors in the rotor position transducer during operation of the machine. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
-
Specification