Electricity: motive power systems – Synchronous motor systems – Brushless motor closed-loop control
Reexamination Certificate
2007-02-01
2009-12-01
Duda, Rina I (Department: 2837)
Electricity: motive power systems
Synchronous motor systems
Brushless motor closed-loop control
C318S400320, C318S599000
Reexamination Certificate
active
07626349
ABSTRACT:
A heating, ventilating and/or air conditioning (HVAC) system includes a system controller, a motor controller, an air-moving component, and a permanent magnet motor having a stationary assembly, a rotatable assembly in magnetic coupling relation to the stationary assembly, and a shaft coupled to the air-moving component. The motor controller is configured for performing sinewave commutation in response to one or more control signals received from the system controller to produce continuous phase currents in the permanent magnet motor for driving the air-moving component. By using sinewave commutation (in contrast to square wave commutation), the noise and vibration produced by the HVAC system is markedly reduced.
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“Closed-Loop Vector Yorque Control,” www.worldservo.com/html/features/vector.htm; [retrieved on Nov. 22, 2006]; pp. 1-3.
“Sinewave Commutation,” www.worldservo.com/html/features/sine.htm; [retrieved on Nov. 22, 2006]; pp. 1-3.
Carrier Mark E.
Henderson Michael I.
Marcinkiewicz Joseph G.
Shahi Prakash B.
Woodard Arthur E.
Duda Rina I
Emerson Electric Co.
Harness & Dickey & Pierce P.L.C.
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