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:
Feb. 16, 2010
Filed:
Dec. 12, 2007
John F. Gonder, Mountlake Terrace, WA (US);
John F. Gonder, Mountlake Terrace, WA (US);
The Boeing Company, Chicago, IL (US);
Abstract
Reference signals are combined with a chop frequency signal in a pulse width modulator (PWM) to provide plural inputs to a multi-phase H-bridge amplifier. Also provided to the bridge amplifier is a high voltage DC input which is converted by the pulsed inputs to the bridge amplifier to a variable AC voltage for driving a motor. The AC drive voltage is also provided to a variable frequency voltage-controlled oscillators (VCOs) in a feedback arrangement, with the variable frequency VCO outputs heterodyned with each of plural outputs of a multi-phase ring oscillator to provide plural baseband signals having a constant phase relationship at a high frequency. The baseband signals form the aforementioned reference signals provided to the PWM in the feedback arrangement with closed loop control and frequency and phase discrimination using phase lock loop techniques for synchronous motor control over a range of DC-100 kHz with 0-25 MHz VCOs.