US Patent Application No: 2008/0092,893

Number of patents in Portfolio can not be more than 2000

COMPRESSOR CONTROL SYSTEM FOR A PORTABLE VENTILATOR

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A method and apparatus for controlling a brushless DC (BLDC) motor over a wide range of angular speeds is presented. Analog magnetic sensors provide continuous signal measurements related to the rotor angular position at a sample rate independent of rotor angular speed. In one embodiment, analog signal measurements are subsequently processed using an arctangent function to obtain the rotor angular position. The arctangent may be computed using arithmetic computation, a small angle approximation, a polynomial evaluation approach, a table lookup approach, or a combination of various methods. In one embodiment, the BLDC rotor is used to drive a Roots blower used as a compressor in a portable mechanical ventilator system.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
CAREFUSION 203, INC.SAN DIEGO, CA15

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Boyle, David - 20 303
Holmes, Michael - 29 366
Williams, Malcolm - 65 603

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Patent Info (Count) # Cites Year
 
Other [Check patent profile for assignment information] (1)
* 2011/0308,523 AIR ON DEMAND BREATHING SYSTEM USING A DYNAMIC TRANSDUCER FOR CONTROLLING AIR 0 2011
 
3M INNOVATIVE PROPERTIES COMPANY (1)
* 2012/0138,051 Method of Controlling a Powered Air Purifying Respirator 1 2010
 
HAMILTON SUNDSTRAND SPACE SYSTEMS INTERNATIONAL, INC. (3)
* 8,294,396 Compact FPGA-based digital motor controller 1 2009
* 2011/0006,713 COMPACT FPGA-BASED DIGITAL MOTOR CONTROLLER 1 2009
* RE45388 Compact FPGA-based digital motor controller 0 2013
 
MIDMARK CORPORATION (1)
* 2012/0060,290 BRUSHLESS DC MOTOR BRAKING FOR A BARRIER FREE MEDICAL TABLE 2 2010
 
CAREFUSION 203, INC. (1)
* 7,607,437 Compressor control system and method for a portable ventilator 3 2004
 
HONEYWELL INTERNATIONAL INC. (1)
* 2011/0114,093 AUTOMATIC FITMENT DETECTION AND FLOW CALIBRATION USING NON-CONTACT SENSING IN POWERED AIR PURIFYING RESPIRATORS 1 2009
 
KABUSHIKI KAISHA YASKAWA DENKI (2)
* 8,884,572 Signal processor, encoder, and motor system 0 2012
* 2013/0026,965 SIGNAL PROCESSOR, ENCODER, AND MOTOR SYSTEM 0 2012
 
DEERE & COMPANY (2)
8,897,954 Method for calibrating position sensor on electric motor 0 2011
* 2012/0279,791 Method for Calibrating Position Sensor on Electric Motor 0 2011
* Cited By Examiner