HID (high intensity discharge) ballast based on DSP (digital signal processor)
A technology of ballasts and transformers, applied in the field of circuits, can solve problems such as stable operation of gas discharge lamps
Inactive Publication Date: 2015-01-14
SHANGHAI SEEYAO ELECTRONICS CO LTD
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Problems solved by technology
As a new light source, gas discharge lamps have the advantages of high luminous intensity and long life. However, due to the harsh temperature environment of most vehicles, the ballasts of existing gas discharge lamps are often difficult to use in harsh environments. The gas discharge lamp works stably, so it is necessary to improve the ballast of the existing gas discharge lamp
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[0015] The implementation of the present invention will be illustrated by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.
[0016] see figure 1 . It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached to this specification are only used to match the content disclosed in the specification, for those who are familiar with this technology to understand and read, and are not used to limit the implementation of the present invention. Limiting conditions, so there is no technical substantive meaning, any modification of structure, change of proportional relationship or adjustment of size, without affecting the effect and purpose of the present invention, should still fall within the scope of the present invention. The disclosed technical content must be within the scope covered. At the same time, term...
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The invention provides an HID (high intensity discharge) ballast based on a DSP (digital signal processor). The HID ballast comprises a fly-back power supply unit, an H-bridge driving circuit, an H-bridge circuit, a power supply parameter sampling circuit, a zero voltage sampling circuit and a digital signal processing circuit, wherein the fly-back power supply unit is provided with a controlled switch tube and is used for carrying out converting, rectifying and filtering operations on a power supply; the H-bridge driving circuit is connected to the output end of the fly-back power supply unit; the H-bridge circuit is connected with the H-bridge driving circuit; the power supply parameter sampling circuit is connected with the fly-back power supply unit and is used for sampling the power supply parameters of the power supply and the power supply parameters output by the fly-back power supply unit; the zero voltage sampling circuit is connected with the controlled switch tube and is used for sampling a zero passage signal of the controlled switch tube; and the digital signal processing circuit is connected with the power supply parameter sampling circuit and the zero voltage sampling circuit, and is used for outputting a driving signal for controlling the H-bridge driving circuit based on a sampling result of the power supply parameter sampling circuit and controlling the controlled switch tube to switch on and switch off based on the zero passage signal output by the zero voltage sampling circuit. The HID ballast based on the DSP has the advantage of realizing the zero voltage switch of the switch tube.
Description
technical field [0001] The invention relates to the circuit field, in particular to a DSP-based HID ballast. Background technique [0002] With the development of technology, more and more vehicles have begun to use gas discharge lamps (HID). As a new light source, gas discharge lamps have the advantages of high luminous intensity and long life. However, due to the harsh temperature environment of most vehicles, the ballasts of existing gas discharge lamps are often difficult to use in harsh environments. The gas discharge lamp works stably, so it is necessary to improve the ballast of the existing gas discharge lamp. Contents of the invention [0003] In view of the above-mentioned shortcomings of the prior art, the object of the present invention is to provide a DSP-based HID ballast to realize zero-voltage switching of the switching tube. [0004] In order to achieve the above purpose and other related purposes, the DSP-based HID ballast provided by the present invent...
Claims
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IPC IPC(8): H05B41/282
Inventor 蒋荡华王永和王艳周张宝安李国阳
Owner SHANGHAI SEEYAO ELECTRONICS CO LTD