Motor driving apparatus with rotational speed limitation function and fan apparatus with rotational speed limitation function
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 14, 2014
Grant Date -
Apr 10, 2014
app pub date -
Oct 4, 2012
filing date -
Oct 4, 2012
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A motor driving apparatus is applied to a fan and motor mechanism and a voltage supply unit. The motor driving apparatus includes a motor driving unit, a voltage division resistor, a first resistor, a first switch unit, a second resistor, a second switch unit, a third resistor, a third switch unit, a transistor switch, and a pulse width modulation unit. The first switch unit, the second switch unit, and the third switch unit are configured to select the rotational speed upper limitation of the fan and motor mechanism for suppressing noise.
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