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
Image generation based on a plurality of overlapped swathes
Methods for isolating ligands of the human bitter taste receptor TAS2R49
Restore software with aggregated view of content databases
Processing circuitry for use with a position sensor
Optical recording medium, and method for producing optical recording medium
Centralized behavioral information system
Methods and compositions for inhibition of neutrophil exocytosis
  Randomly Featured Patents
DC jack connector
Carton with spout
Flush pot assembly for user requiring care-taking
Vapor compression distillation apparatus
Color picture tube with support arrangement for a rectangular shadow mask
Golf ball for putting practice
Method for the commercial production of transgenic plants
Self contained, cryogenic mixed gas single phase storage and delivery system and method for body cooling, gas conditioning and utilization
System and method for measuring pin voltages of electronic components
Saponin and preservative compositions for reduction of protozoa