Methods and apparatus for controlling current in an electrical machine
First Claim
1. A method for determining electric currents for an electrical machine, said method comprising:
- generating a first real power current demand signal and a first reactive power current demand signal; and
determining at least one of a second real power current demand signal and a second reactive power current demand signal by;
prioritizing at least one of a second real power current demand signal over a second reactive power current demand signal and the second reactive power current demand signal over the second real power current demand signal; and
comparing at least one of the first real power current demand signal and first reactive power current demand signal to at least one electrical machine current limit signal.
2 Assignments
0 Petitions
Accused Products
Abstract
A method for determining electric currents for an electrical machine includes generating a first real power current demand signal and a first reactive power current demand signal. The method also includes determining at least one of a second real power current demand signal and a second reactive power current demand signal by prioritizing a second real power current demand signal over a second reactive power current demand signal. Alternatively, the method also includes determining at least one of a second real power current demand signal and a second reactive power current demand signal by prioritizing the second reactive power current demand signal over the second real power current demand signal. The method further includes comparing at least one of the first real power current demand signal and first reactive power current demand signal to at least one electrical machine current limit signal.
-
Citations
20 Claims
-
1. A method for determining electric currents for an electrical machine, said method comprising:
-
generating a first real power current demand signal and a first reactive power current demand signal; and determining at least one of a second real power current demand signal and a second reactive power current demand signal by; prioritizing at least one of a second real power current demand signal over a second reactive power current demand signal and the second reactive power current demand signal over the second real power current demand signal; and comparing at least one of the first real power current demand signal and first reactive power current demand signal to at least one electrical machine current limit signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A control system for determining electric currents for an electrical machine comprising:
-
at least one real power current demand signal functional logic block configured to modulate a real power current demand signal within a first band and modulate a reactive power current demand signal within a second band, wherein said first band is greater than said second band; at least one reactive power current functional logic block configured to modulate a reactive power current demand signal within a third band and modulate a real power current demand signal within a fourth band, wherein said third band is greater than said fourth band; and at least one selection mechanism configured to select at least one of said real power current demand signal functional logic block and said reactive power current demand signal functional logic block. - View Dependent Claims (10, 11, 12, 13, 14)
-
-
15. A wind turbine generator comprising:
-
a rotor comprising a hub, at least one rotor blade coupled to said hub, and a rotor shaft coupled to said hub for rotation therewith; at least one electrical generator coupled to said rotor shaft; at least one frequency converter electrically coupled to said electrical generator; and a control system for determining electric currents in at least one of said at least one electrical generator and said at least one frequency converter, said control system comprising at least one real power current demand signal functional logic block, at least one reactive power current functional logic block, and at least one selection mechanism, said at least one real power current demand signal functional logic block configured to modulate a real power current demand signal within a first band and modulate a reactive power current demand signal within a second band, wherein said first band is greater than said second band, said at least one reactive power current functional logic block configured to modulate a reactive power current demand signal within a third band and modulate a real power current demand signal within a fourth band, wherein said third band is greater than said fourth band, said at least one selection mechanism configured to select at least one of said real power current demand signal functional logic block and said reactive power current demand signal functional logic block. - View Dependent Claims (16, 17, 18, 19, 20)
-
Specification