Driving apparatus for fan motor

Electricity: motor control systems – Closed loop speed control system for dc motor with commutator – Armature control by digital or combined analog and digital...

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C388S819000, C318S400010

Reexamination Certificate

active

07826722

ABSTRACT:
A driving apparatus for fan motors, electrically connected between a pulse width modulation (PWM) signal generator and a controller, includes a converter electrically connected to the PWM signal generator, generating a first reference voltage according to the duty cycle of a PWM signal generated by the PWM signal generator; a reference voltage generator electrically connected to an external power source, generating a second reference voltage according to the external power source; and a comparator having a first and second input terminal and an output terminal; wherein the first input terminal is electrically connected to the converter, the second input terminal is connected to the reference voltage generator and the output terminal is connected to the controller, and when the first reference voltage is greater than the second reference voltage, a driving signal is output from the output terminal to the controller to control the rotation speed of the fan motor.

REFERENCES:
patent: 4855652 (1989-08-01), Yamashita et al.
patent: 5167709 (1992-12-01), Shinohara et al.
patent: 5675231 (1997-10-01), Becerra et al.
patent: 6407525 (2002-06-01), Horng et al.
patent: 6943517 (2005-09-01), Yoshitomi et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Driving apparatus for fan motor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Driving apparatus for fan motor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Driving apparatus for fan motor will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-4246990

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.