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
System and method of detecting and locating intermittent and other faults
Portable computer
High density molecular memory storage with read and write capabilities
Dye sensitised solar cell
Nanoparticle entrapment of materials
Electronic component, a semiconductor wafer and a method for producing an electronic component
Method and apparatus for executing load distributed printing
  Randomly Featured Patents
Class I anti-CEA antibodies and uses thereof
Attitude indicator comparator warning system
Accounting and cash-transfer system for filling stations having metered pumps
System and method of determining a position of a radiation scattering/reflecting element
Flash EEPROM system which maintains individual memory block cycle counts
Impact gauge
Device for monitoring a plurality of systems of an aircraft including a display displaying tasks already performed
Braking mechanism for document table drive means in a copying apparatus
Thermally dissipating tactical mount for firearm accessories and devices
Method for preparing a magnetic recording medium