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
Control unit of a ride level control system, and ride level control system
Power device and method of packaging same
Content output control device and content output control method
Electric motor
Connector with shielding device and method for manufacturing connector
Apparatus for generating electrical energy from rocking activated energy
Multiple carrier compression scheme
  Randomly Featured Patents
Display element and display device
Exercise chair
Marking tape
Vibration machine for compacting materials, in particular an earth compacting machine
Two port network with shared elements for combining and filtering luma and chroma components to form composite video signal
Piston for internal combustion engine
Sidactor fail-safe device
Copy holder
Method of fabricating a dual damascene structure
Two section laundry basket