Rotor position detection in an electrical machine
First Claim
1. A method of determining error in the output of a rotor position transducer (rpt) providing first signals, the method comprising:
- operating an electrical machine so as to produce the first signals and to produce, from a sensorless position detection algorithm, second signals indicative of the position of a rotor of the electrical machine; and
comparing the first and second signals to produce an error value relating to the first signals.
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 the use of a position detection algorithm so as to provide compensations to the control system of the machine. The compensations 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.
27 Citations
16 Claims
-
1. A method of determining error in the output of a rotor position transducer (rpt) providing first signals, the method comprising:
-
operating an electrical machine so as to produce the first signals and to produce, from a sensorless position detection algorithm, second signals indicative of the position of a rotor of the electrical machine; and
comparing the first and second signals to produce an error value relating to the first signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. Apparatus for determining error in the output of a rotor position transducer (rpt) providing first signals, the apparatus comprising:
-
means for storing a sensorless position detection algorithm operable to produce second signals indicative of the position of the rotor; and
control means for operating a machine so as to produce the first and second signals. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
-
Specification