Brushless DC fan module incorporating integral fan control circuit with a communication port for receiving digital commands to control fan
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 21, 2002
Grant Date -
N/A
app pub date -
Mar 31, 2000
filing date -
Mar 31, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A fan module includes integral fan control circuitry which independently implements a self-contained start and run motor control loop and also includes a communications port to accept commands from a host processor and to provide status and other data in response to queries from the host processor. In one embodiment, the fan module interfaces with a two-wire serial bus, such as an I.sup.2 C bus or SMbus, and accepts commands and provides status and data in a serial digital format. A variety of commands such as on/off, and various speed control settings may be received from the host system. The actual speed of the fan may be reported back when queried by the host system. In some embodiments the temperature of the fan or of the air flow through the fan may be reported back when queried. The entire fan control circuit may be incorporated within the fan housing and a simple serial two-wire interface may be provided in addition to the two power terminals for the fan, resulting in a compact four-wire interface for the fan module.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully