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
Carrier sense multiple access (CSMA) protocols for power line communications (PLC)
Solid-state imaging device, method for manufacturing solid-state imaging device, and electronic apparatus
System and method for access of user accounts on remote servers
Accessory sleeve
Methods and apparatus for preserving privacy in an RFID system
Automated measurement of concentration and/or amount in a biological sample
Event-associating software application for accessing digital media
  Randomly Featured Patents
Branch instruction executing device for tracing branch instruments based on instruction type
Method of operating a pneumatic brake servo-unit
Type II quantum well optoelectronic devices
Navigating images using image based geometric alignment and object based controls
Musical pacifier
Dispensing assembly having coded attachment of an accessory to a multiple component cartridge or dispensing device using differently sized inlets and outlets
Pendant or charm
Aircraft seat having improved user lumbar load characteristics during a crash event
Displaying application information in an application-switching user interface
Foot warming heating element and method of manufacturing foot warming heating element