Pulse width modulation power supply for loads such as artificial horizon indicator gyros and the like
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 25, 1989
Grant Date -
N/A
app pub date -
Jun 23, 1986
filing date -
Jun 23, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An AC power supply circuit for an AC motor having a main winding and an auxiliary winding includes a capacitor between the auxiliary and main windings to produce a signal having a phase related to the deviation of the motor from a desired rpm. A rectifier receives the phase signal to generate an error signal of magnitude related to the deviation of the motor rpm from the desired operating rpm. A pulse width modulator circuit generates a square wave having a variable duty cycle for connection to the motor, the duty cycle being minimum at the desired operating rpm. The pulse width modulator circuit is responsive to the error signal to increase the duty cycle of the square wave as the motor rpm deviates from the desired operation rpm, so that the motor rpm is maintained over a range of power supply voltages and other operating conditions.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
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