Industry Patents
Patent: 7233112
PWM Switching Power Supply Control Methods
(Click image for PDF of full patent)
| Patent Number: |
7233112 |
| Title: |
PWM Switching Power Supply Control Methods |
| Abstract: |
The solid state switching section of a high frequency PWM switching power
supply may encounter problems in accurately regulating output power when
the requested output power is above a threshold level, the threshold
level typically being a high level approaching one hundred percent of the
power of the sinusoidal AC power source. Below the threshold level, the
power supply is operated in a full PWM mode to regulate the output power
level. Above the threshold level, the power supply is operated in a full
on, continuously conducting mode in a central part of the half cycles of
the AC supply. Outside of this central portion, the power supply is
operated in the in the PWM mode, using a duty cycle within the capability
of the solid state switching section. The output power level is regulated
by varying the duration of the central full on portion of the half cycle.
A similar control method is used for reducing heat generated by the solid
state switching section of the power supply.
|
| Country of Issue: |
US |
| First Named Inventor: |
Burke, Rasmussen |
| Assignee: |
Electronic Theatre Controls |
| Continuation or Divisional of: |
|
| International Classification: |
H05B 37/02 |
| US Classification: |
315/209 |
| Issue Date: |
06-19-2007 |
| Filing Date: |
05-26-2005 |
| Application : |
11/138722 |
| Notes: |
|
| Link to Patent at freepatentsonline.com: |
7233112 at Freepatentsonline |
| Link to World Patent Family1: |
World Patent Family at European Patent Office |
| Link to Google Patents1: |
7233112 at Google Patents |
1. The Google Patents and World Patent Family links will likely not work until a few weeks
after the patent has issued - they take a while to get new patents in their systems.
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