Patent ID: 11936323
Assignee: ANNEXAIR INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 9:
10. A method for simultaneously controlling a plurality of permanent magnet electronically commutated motors by a single variable frequency drive (VFD), wherein the VFD is connected to the plurality of permanent magnet electronically commutated motors, and wherein each motor of the plurality of permanent magnet electronically commutated motors does not contain a built-in VFD, the method comprising:
receiving, by the VFD, signals of back electromotive force corresponding to a motor of the plurality of permanent magnet electronically commutated motors; and
transmitting, based on the signals of back electromotive force and to each permanent magnet electronically commutated motor of the plurality of permanent magnet electronically commutated motors, pulses of alternating current.