Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Compensation of motor control using current-RPM relation for a ventilation system










Image Number 14 for United States Patent #8134319.

A method of constant airflow control includes various controls to accomplish a substantially constant airflow rate over a significant change of the static pressure in a ventilation duct. One control is a constant IRPM control, which is primarily used in a low static pressure range. Another control is a constant RPM control, which is primarily used in a high static pressure range. These controls requires neither a static pressure sensor nor an airflow rate sensor to accomplish substantially constant airflow rate while static pressure changes. Also, the method improves the accuracy of the control by correcting certain deviations that are caused by the motor's current-RPM characteristics. To compensate the deviation, the method adopts a test operation in a minimum static pressure condition. Also disclosed is an apparatus for conducting these control methods.








 
 
  Recently Added Patents
Transmission apparatus, receiving apparatus, method, and storage medium
Reactor core of liquid metal cooled reactor
Image processing apparatus
Tandem electric machine arrangement
Hydrothermal synthesis of nanocubes of sillenite type compounds for photovoltaic applications and solar energy conversion of carbon dioxide to fuels
Materials and methods for stress reduction in semiconductor wafer passivation layers
Mobile communication device
  Randomly Featured Patents
Device for determining amount of deployment of an anchor from a rope compartment having an anchor line through hole
Disc implant
Process for the production of petroleum coke
Methods and apparatus for applying liquid fluoropolymer solutions to substrates
Ink jet inks containing toner particles as colorants
Weather-resistant polyacetal resin composition and weather-resistant molded articles formed thereof
Polymerization catalysts
Tie clip mounted behind a tie
Film cartridge for a compact camera
Receptacle