ALEXANDRIA, Va., Dec. 16 -- United States Patent no. 12,500,488, issued on Dec. 16, was assigned to HAMILTON SUNDSTRAND Corp. (Charlotte, N.C.).
"Electrical machine" was invented by Grzegorz Ryszard Popek (Birmingham, Great Britain) and Mital Shah (Harrow, Great Britain).
According to the abstract* released by the U.S. Patent & Trademark Office: "An electrical machine includes a first set of windings, a second set of windings and a power controller connected to the first set of windings by a first set of feeder cables. The power controller controls the current and/or voltage supplied to the first set of windings at a control frequency and generates a test signal to supply to the first set of windings. The test signal has one or more frequ...