US Patent Application No: 2008/0092,893

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COMPRESSOR CONTROL SYSTEM FOR A PORTABLE VENTILATOR

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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, CA13

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Boyle, David - 20 253
Holmes, Michael - 29 323
Williams, Malcolm - 65 536

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
CAREFUSION 203, INC. (1)
7,607,437 Compressor control system and method for a portable ventilator 2 2004
 
HAMILTON SUNDSTRAND SPACE SYSTEMS INTERNATIONAL, INC. (1)
8,294,396 Compact FPGA-based digital motor controller 0 2009