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)

Importance

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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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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
CAREFUSION 203, INC.SAN DIEGO, CA17

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Boyle, David Monrovia, CA 12 458
Holmes, Michael Redlands, CA 21 517
Williams, Malcolm San Clemente, CA 48 766

Cited Art Landscape

Patent Info (Count) # Cites Year
 
Other [Check patent profile for assignment information] (3)
* 5,388,575 Adaptive controller for automatic ventilators 80 1992
* 6,247,906 Combined pump and motor device 12 1999
* 6,615,446 Canister vacuum cleaner 10 2001
 
RIC Investments, LLC (1)
* 5,996,731 Compressor muffler 21 1998
 
MICROLIFE MEDICAL HOME SOLUTIONS INC. (1)
* 6,468,222 Metabolic calorimeter employing respiratory gas analysis 202 2000
 
U.S. ENVIRONMENTAL PROTECTION AGENCY (1)
* 6,619,325 Hydraulic hybrid accumulator shut-off valve 25 2001
 
SGS-THOMSON MICROELECTRONICS, INC. (1)
* 5,428,276 Automatic adjustment of commutation delay for brushless DC motor for improved efficiency 34 1994
 
CAREFUSION 203, INC. (1)
* 7,188,621 Portable ventilator system 85 2004
 
BSH BOSCH UND SIEMENS HAUSGERÄTE GMBH (1)
* 2004/0015,364 Electrical appliance, in particular, a ventilator hood 8 2003
 
COMPUMEDICS SLEEP PTY LTD (1)
* 6,349,724 Dual-pressure blower for positive air pressure device 125 2000
 
RESMED LIMITED (1)
* 6,237,592 Auto-calibration of pressure transducer offset 28 1998
 
DELL PRODUCTS L.P. (2)
* 2004/0061,996 Open access monitor stand with multiple APR mounting locations 5 2002
* 2004/0190,236 Flat panel monitor stand 7 2003
 
TECUMSEH PRODUCTS COMPANY (1)
* 6,558,137 Reciprocating piston compressor having improved noise attenuation 30 2001
 
ROBERT BOSCH GMBH (3)
* 5,880,586 Apparatus for determining rotational position of a rotatable element without contacting it 76 1996
* 6,479,987 Angle encoder with four hall sensors and method for angle determination of output signals of the four hall sensors 23 1999
* 6,907,373 Method for calibrating a sensor and switching arrangement for operating a sensor 8 2003
 
CADBURY SCHWEPPES PLC (1)
* 4,637,439 Mini-regulator valve assembly 20 1983
 
ROTRON INCORPORATED (1)
* 4,656,553 Electronically programmable universal brushless DC fan with integral tracking and locked rotor protection 47 1986
 
KIMBERLY-CLARK WORLDWIDE, INC. (1)
* 5,871,465 Remotely programmable infusion system 246 1996
 
Sensormedics Corporation (1)
* 2004/0040,563 Pressure regulating valve for use in continuous positive airway pressure devices 6 2002
 
MOOG INC. (1)
* 6,979,181 Method for controlling the motor of a pump involving the determination and synchronization of the point of maximum torque with a table of values used to efficiently drive the motor 16 2002
 
H.R. TEXTRON, INC. (1)
* 6,239,564 State advance controller commutation loop for brushless D.C. motors 28 1999
 
KABUSHIKI KAISHA TOSHIBA (1)
* 5,253,486 Silencer attenuating a noise from a noise source to be ventilated and a method for active control of its noise attenuation system 19 1991
 
Sundstrand Corporation (7)
* 4,897,583 Variable speed variable torque brushless DC motor 26 1989
* 5,493,200 Control for a brushless generator 89 1993
* 5,461,293 Rotor position detector 71 1993
* 5,495,163 Control for a brushless generator operable in generating and starting modes 48 1993
* 5,495,162 Position-and-velocity sensorless control for starter generator electrical system using generator back-EMF voltage 58 1993
* 5,384,527 Rotor position detector with back EMF voltage estimation 81 1993
* 5,430,362 Engine starting system utilizing multiple controlled acceleration rates 85 1993
 
HUDSON RCI AB (1)
* 6,279,576 Purification system 35 1999
* Cited By Examiner

Patent Citation Ranking

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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
 
HAMILTON SUNDSTRAND SPACE SYSTEMS INTERNATIONAL, INC. (3)
* 8,294,396 Compact FPGA-based digital motor controller 2 2009
* 2011/0006,713 COMPACT FPGA-BASED DIGITAL MOTOR CONTROLLER 1 2009
* RE45388 Compact FPGA-based digital motor controller 0 2013
 
3M INNOVATIVE PROPERTIES COMPANY (2)
* 9,119,979 Method of controlling a powered air purifying respirator 0 2010
* 2012/0138,051 Method of Controlling a Powered Air Purifying Respirator 3 2010
 
Midmark Corporation (1)
* 2012/0060,290 BRUSHLESS DC MOTOR BRAKING FOR A BARRIER FREE MEDICAL TABLE 3 2010
 
CAREFUSION 203, INC. (2)
* 7,607,437 Compressor control system and method for a portable ventilator 5 2004
* 2005/0031,322 Compressor control system for a portable ventilator 10 2004
 
HONEYWELL INTERNATIONAL INC. (1)
* 2011/0114,093 AUTOMATIC FITMENT DETECTION AND FLOW CALIBRATION USING NON-CONTACT SENSING IN POWERED AIR PURIFYING RESPIRATORS 2 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
 
BOSCH SECURITY SYSTEMS BV (2)
* 9,190,940 Brushless motor speed control system 0 2009
* 2013/0169,196 BRUSHLESS MOTOR SPEED CONTROL SYSTEM 0 2009
* Cited By Examiner