Self-oscillating electronic discharge lamp ballast with dimming control

Publication Date
2004-02-24Filing Date
2001-12-14Inventor
Lee, Fred C.
Tao, Fengfeng
Metadata
Show full item recordAbstract
A simplified electronic ballast for a discharge lamp which provides dimming by control of inverter frequency through modulation of magnetizing current in a transformer such that the switching frequency is made substantially independent of the load presented. The principle of frequency control in a manner independent of the load is extendable to other types of loads and power supplies and converters to regulate power coupled to the load. Clamping capacitors are used to replace other clamping circuits in order to allow current injection to be controlled by a simple variable voltage while frequency control by current injection provides enhanced circuit performance.
Assignee
Virginia Tech Intellectual Properties, Inc.
Patent Number
6696803
Application Number
10014800
Primary/U.S. Class
315/291
Other/U.S. Class
315/224
315/307
CPC Class
H05B41/2827
H05B41/3925
Y02B20/185
Patent Type
utility
Collections
- Virginia Tech Patents [685]