The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 01, 2009
Filed:
Feb. 01, 2007
Joseph G. Marcinkiewicz, St. Peters, MO (US);
Arthur E. Woodard, Manchester, MO (US);
Prakash B. Shahi, St. Louis, MO (US);
Mark E. Carrier, Wildwood, MO (US);
Michael I. Henderson, North Yorkshire, GB;
Joseph G. Marcinkiewicz, St. Peters, MO (US);
Arthur E. Woodard, Manchester, MO (US);
Prakash B. Shahi, St. Louis, MO (US);
Mark E. Carrier, Wildwood, MO (US);
Michael I. Henderson, North Yorkshire, GB;
Emerson Electric Co., St. Louis, MO (US);
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.