ELECTROMAGNETIC INTERFERENCE SUPPRESSING APPARATUS FOR HIGH-FREQUENCY SIGNAL GENERATION DEVICE

• US 20100118506A1
• Filed: 12/24/2007
• Published: 05/13/2010
• Est. Priority Date: 12/31/2006
• Status: Active Grant

• Current Assignee: Signify Holding B.V. (Signify N.V.)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: CHENG, Ming
• Granted Patent: US 8,134,845 B2
• Time in Patent Office: Days
• US Class Current: 361/818
• CPC Class Codes: H05B 41/02 Details
• CPC Class Codes: Y02B 20/00 Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps

Abstract

The present utility model relates to an electromagnetic interference suppressing apparatus for a high-frequency signal generation device. The high-frequency signal generation device includes an inverter means which is used for converting a direct current signal into a high-frequency alternating current signal, wherein the electromagnetic interference suppressing apparatus includes an electric conductor which is in capacitive or inductive coupling with the high-frequency signal generation device and is connected to the reference zero voltage point of the direct current signal. With the present utility model, the electromagnetic interference generated by the high-frequency signal generation device may be effectively suppressed in the case where a reliable earthing is not achievable. The present utility model relates also to an electronic ballast having the function of suppressing electromagnetic interference, and a fluorescent lamp of a compact type having the function of suppressing electromagnetic interference.

Claims

1. An electromagnetic interference suppressing apparatus for a high-frequency signal generation device, the high-frequency signal generation device comprising an inverter means which is used for converting a direct current signal into a high-frequency alternating current signal, wherein the electromagnetic interference suppressing apparatus includes an electric conductor which is in capacitive or inductive coupling with the high-frequency signal generation device and is connected to the reference zero voltage point of the direct current signal.

2. The electromagnetic interference suppressing apparatus according to claim 1, wherein the electric conductor is a metal enclosure surrounding the high-frequency signal generation device

3. The electromagnetic interference suppressing apparatus according to claim 1, wherein the high-frequency signal generation device is an electronic ballast for driving a gas discharge lamp in operation.

4. An electronic ballast system, comprising an electronic ballast and an electric conductor;

the electronic ballast includings a rectifying means for converting a low-frequency alternating current signal into a direct current signal and an inverter means for converting the direct current signal into a high-frequency alternating current signal;

the electric conductor being disposed around the electronic ballast, coupled to the electronic ballast via a capacitor or an inductor and connected to the reference zero voltage point of the direct current signal.

5. An energy-saving lamp of a compact type, comprising a lamp enclosure portion;

the enclosure portion being provided with an electronic ballast inside, and the electronic ballast including a rectifying means for converting a low-frequency alternating current signal into a direct signal and an inverter means for converting the direct current signal into a high-frequency alternating current signal;

the lamp enclosure portion including a metal enclosure inside, the metal enclosure being disposed between the electronic ballast and the lamp enclosure, coupled to the electronic ballast via a capacitor or an inductor and connected to the reference zero voltage point of the direct current signal in the electronic ballast.