System for controlling a plurality of synchronous permanent magnet electronically commutated motors
AssigneeAnnexair Inc.
InventorsFrançois LEMIEUX, Thomas LIBANET
Life of this patent
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Abstract
A system for simultaneously controlling a plurality of PM AC motors includes a single VFD operatively connected to a power source. The single VFD is programmable to have predetermined operating conditions. The plurality of PM AC motors is operatively connected to the single VFD. Each PM AC motor is free of a built-in VFD. Each PM AC motor is operated in accordance with the operating conditions of the single VFD.
Claims20
A variable frequency drive (VFD) configured to simultaneously control a plurality of permanent magnet electronically commutated motors, wherein:
- the VFD is connected to at least one power source,
- the VFD is connected to the plurality of permanent magnet electronically commutated motors,
- the VFD controls a speed and a torque of each of the plurality of permanent magnet electronically commutated motors, and
- each motor of the plurality of permanent magnet electronically commutated motors does not contain a built-in VFD.
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.
A system for simultaneously controlling a plurality of permanent magnet electronically commutated motors, the system comprising:
- a variable frequency drive (VFD) connected to at least one power source and to the plurality of permanent magnet electronically commutated motors, wherein the VFD transmits alternating current (AC) pulses to the plurality of permanent magnet electronically commutated motors based on a signal of back electromotive force from the plurality of permanent magnet electronically commutated motors;
- and
- the plurality of permanent magnet electronically commutated motors, wherein each permanent magnet electronically commutated motor does not include a built-in variable frequency drive.
Dependencies are inferred from the claim text.