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Method for solving problem of high-frequency driving acoustic resonance of high voltage sodium lamp

A high-pressure sodium lamp and acoustic resonance technology, applied in the field of lighting, can solve the problems of lamp extinguishing and blasting, arc bending, acoustic resonance, etc., and achieve the effects of saving electric energy, prolonging service life and improving light efficiency.

Inactive Publication Date: 2012-12-19
SUN YAT SEN UNIV
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Problems solved by technology

However, when the high-pressure sodium lamp is driven at high frequency (10KHz~200KHz), acoustic resonance will occur. At this time, the arc bends and breaks, and the lamp goes out or even explodes.
In order to avoid acoustic resonance, the current high-frequency electronic ballast products are reluctant to choose a working frequency above 40KHz, so that they cannot make good use of the advantages of high-pressure sodium lamps driven by high frequency

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  • Method for solving problem of high-frequency driving acoustic resonance of high voltage sodium lamp
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  • Method for solving problem of high-frequency driving acoustic resonance of high voltage sodium lamp

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Embodiment Construction

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] The present invention needs to be used in an electronic ballast adopting embedded control, and its core components are preferably DSP or single-chip microcomputer with timer, AD converter, PWM output controller and the like. The electronic ballast has conventional rectification, PFC (power factor correction), constant current or constant power control of the load (high pressure sodium lamp), DC / AC frequency conversion control. The present invention is added therein as a link of frequency conversion control.

[0021] The realization method of the present invention is to continuously detect the acoustic resonance phenomenon during normal operation, once the initial symptom of the acoustic resonance is detected, it immediately jumps to work at another frequency. The specific method is that the embedded controller continuously rea...

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Abstract

The invention provides a method for solving the problem of high-frequency driving acoustic resonance of a high voltage sodium lamp which can operate under high frequency, improve lighting effect, save electric energy and prolong service life and which is easy and feasible in operation. In the method, an embedded electronic ballast is adopted. The embedded electronic ballast is characterized in that a frequency hopping program is added in a frequency conversion controller of the electronic ballast. The method for solving the problem of high-frequency driving acoustic resonance of the high voltage sodium lamp comprises the steps of: 1. detecting the problem in the initial stage of the acoustic resonance, and 2. adopting the frequency hopping method to get rid of the existing working frequency to work under another frequency.

Description

technical field [0001] The invention belongs to the technical field of lighting, and in particular relates to the problem that high-pressure sodium lamps generate acoustic resonance when driven at high frequencies. Background technique [0002] High-pressure sodium lamps are the same as other gas discharge lamps. Increasing the frequency of the external driving power can improve the light efficiency and achieve the purpose of saving electricity; at the same time, it can also reduce the loss of the cathode and increase the life. However, when the high-pressure sodium lamp is driven at high frequency (10KHz~200KHz), acoustic resonance phenomenon will occur. At this time, the arc bends and breaks, and the lamp goes out or even explodes. In order to avoid acoustic resonance, current high-frequency electronic ballast products are unwilling to choose a working frequency above 40KHz, so that they cannot make good use of the advantages of high-frequency sodium lamps driven by high-f...

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Application Information

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IPC IPC(8): H05B41/28
Inventor 马利明史斌宁郑寿森王飞
Owner SUN YAT SEN UNIV
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