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General-purpose electronic ballast

An electronic ballast, a general-purpose technology, applied in electric light sources, electrical components, lighting devices, etc., can solve problems such as temperature rise and low conversion efficiency, and achieve the effect of low cost and component saving

Active Publication Date: 2014-06-25
SHENZHEN LONGMAN SCI & TECH IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of low conversion efficiency and temperature rise in the current three-stage full-bridge power conversion electronic ballast for metal halide lamps, the present invention provides a two-stage ( Double BUCK) soft switching technology, with higher efficiency and lower cost, fundamentally improves reliability and stability

Method used

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Embodiment 1

[0024] Example 1, such as figure 1 , figure 2 As shown, this embodiment is an electronic ballast using a single-chip microcomputer as the main controller. , and then use its internal program to generate a control signal, and then control the MOS tube as a switch through the modulation and driving circuit, and output a voltage suitable for the lamp to work or start. Such as figure 1 As shown: the general-purpose electronic ballast of this embodiment includes a ballast inductor L1 connected in series with the lamp L, and a high-frequency current generating circuit that generates a high-frequency current flowing through the lamp L and the ballast inductor L1 and The control circuit takes the microprocessor MCU as the core. in:

[0025] The high current generating circuit includes MOS transistor Q1 and MOS transistor Q2, energy storage capacitor E1 and energy storage capacitor E2, freewheeling diode D1 and freewheeling diode D2, clamping diode D2 and clamping diode D4.

[00...

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Abstract

The invention provides a general-purpose electronic ballast, which comprises a ballast inductor, a high-frequency current generating circuit and a control circuit, wherein the ballast inductor is connected with a lamp in series; the ballast inductor generates high-frequency current which flows through the lamp and the ballast inductor; and the control circuit controls the current and the voltage of the lamp based on MCU as the core. The general-purpose electronic ballast is different from existing three-stage hardware switch technique and adopts an independently developed single-chip two-stage control mode, thereby greatly saving elements and devices and minimizing cost. The circuit principle of the invention is applicable to electronic ballast applications of all watts, thereby bringing a revolutionary change to the industry of electronic ballasts.

Description

technical field [0001] The invention relates to the field of electronic ballasts, in particular to an electronic ballast using a microprocessor as a controller. Background technique [0002] Electronic ballast is a kind of ballast, which refers to electronic equipment that uses electronic technology to drive electric light sources to produce the required lighting. Corresponding to it is an inductive ballast (or ballast). More and more modern fluorescent lamps use electronic ballasts, which are light and compact, and can even integrate electronic ballasts with lamp tubes. Go for starters alone. Electronic ballasts can also have more functions, such as improving or eliminating the flickering phenomenon of fluorescent lamps by increasing the current frequency or current waveform (such as becoming a square wave); it is also possible to use DC power for fluorescent lamps through the power inverter process. [0003] As a kind of energy-saving lighting appliance, electronic ball...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B41/26
Inventor 陈洪川叶太军林德全
Owner SHENZHEN LONGMAN SCI & TECH IND