Title:
携帯型人工呼吸器用のコンプレッサ制御システム
Document Type and Number:
Japanese Patent JP2007501072
Kind Code:
A
Abstract:
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 approximatiOl~i 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.
Inventors:
Boyle, David
Holmes, Michael
Williams, Malcolm
Holmes, Michael
Williams, Malcolm
Application Number:
JP2006522701A
Publication Date:
January 25, 2007
Filing Date:
August 03, 2004
Export Citation:
Assignee:
PULMONETIC SYSTEMS,INC.
International Classes:
A61M16/00; A47C3/025; A62B7/00; F01C1/18; H02P6/16; A61M11/00; A61M16/10; A61M16/12; A61M16/20; A61H
Domestic Patent References:
| JP2001062765A | 2001-03-13 | |||
| JP2004340681A | 2004-12-02 | |||
| JPH1198884A | 1999-04-09 | |||
| JPH06503484A | 1994-04-21 | |||
| JPH03505170A | 1991-11-14 | |||
| JP2002340610A | 2002-11-27 |
Attorney, Agent or Firm:
Hironobu Onda
Makoto Onda
Makoto Onda