Multi-tap ballast protective circuit and multi-tap ballast
A technology for protecting circuits and ballasts, which is applied in the field of multi-tap ballast protection circuits and multi-tap ballasts, which can solve problems such as ballast tap wiring errors and burnout, and achieve automatic switching of voltage gears to avoid burnout Effect
Inactive Publication Date: 2012-08-22
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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Problems solved by technology
[0004] The purpose of the embodiments of the present invention is to provide a multi-tap ballast protection circuit, which aims to solve the problem of burning out caused by incorrect wiring of the taps of the ballast
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[0013] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0014] The embodiment of the present invention detects the input voltage, judges the voltage gear according to the input voltage, and controls the switch to automatically connect the corresponding ballast tap, so as to solve the problem of burnout caused by incorrect wiring of the ballast tap.
[0015] The implementation of the present invention will be described in detail below in conjunction with specific embodiments.
[0016] figure 1 The structural principle of the multi-tap ballast protection circuit provided by the first embodiment of the present invention is shown. The multi-tap ballast pr...
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The invention is suitable for the field of a lighting driving, and provides a multi-tap ballast protective circuit and a multi-tap ballast. The circuit comprises a voltage converting unit connected with a commercial power network, a voltage detection unit and a switching control unit, wherein the voltage converting unit is used for changing alternating current into low voltage direct current; the voltage detection unit is connected with the voltage converting unit, is used for detecting low voltage direct current so as to judge input voltage of the commercial power network, and provides detection current; and the switching control unit is connected with the voltage detection unit, and is used for controlling to switch on a ballast tap terminal which corresponds to the commercial power network according to the detection current. According to the embodiment of the invention, the voltage converting unit changes the alternating current into the low voltage direct current, when the detection unit detects the input voltage, and the voltage gear is judged; and the switching control unit automatically switches on the ballast tap terminal which corresponds to the commercial power network so as to realize automatic switchover voltage gear, and preventing the ballast from being burnt caused by a wiring error.
Description
technical field [0001] The invention belongs to the field of lighting driving, and in particular relates to a multi-tap ballast protection circuit and a multi-tap ballast. Background technique [0002] As a driving device, ballasts are widely used in lighting products. The so-called ballasts use the induced electromotive force generated at the moment of power-on or power-off. When the input voltage fluctuates, keep the light source stable. [0003] However, in order to adapt to different start-up voltages, ballasts with multiple tap terminals to match multiple voltage inputs are currently used as lighting drivers. However, when wiring, users often make mistakes due to too many tap terminals of the ballast. line, causing the ballast to burn out. Contents of the invention [0004] The purpose of the embodiments of the present invention is to provide a protection circuit for a multi-tap ballast, aiming at solving the problem of burning out caused by incorrect wiring of the ...
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IPC IPC(8): H05B41/285
Inventor 周明杰梁校津张建锋
Owner OCEANS KING LIGHTING SCI&TECH CO LTD