Electronic ballast for high voltage sodium lamp

A technology for electronic ballasts and high-pressure sodium lamps, applied in the field of ballasts, can solve problems such as difficulty in quality assurance

Active Publication Date: 2013-06-12
SHANGHAI MUNICIPAL ELECTRIC POWER CO +2
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  • Abstract
  • Description
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Problems solved by technology

But the complex circuit does not mean stability and also brings difficulties to the quality assurance in the production process

Method used

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  • Electronic ballast for high voltage sodium lamp

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Embodiment Construction

[0007] Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

[0008] Such as figure 1 The schematic block diagram of the electronic ballast for high-pressure sodium lamps is shown. The electronic ballast with AC 220V input from the power supply 1 first passes through the EMI filter circuit 2 realized by the combination of common-mode inductors and capacitors, and then enters the rectification and active power factor correction circuit 3. The bridge rectifier and bridge pair are converted...

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Abstract

The invention relates to a high-voltage sodium lamp electronic ballast; the ballast comprises an EMI filter circuit, a ballast circuit and an APFC circuit, an independent driving circuit, an LC oscillatory circuit and a starting and triggering circuit, a current sampling magnetic ring and a MCU controller. The high-voltage sodium lamp interface is equipped with the current sampling ring, the MCU controller measures whether the sampled current is high (the lamp loop is short circuited) or low (the lamp loop is open), a comparator discovers the abnormal state of the lamp output loop in time, and the high and low driving circuits are closed within half control-driven cycle. Compared with the protection adopted on the forestage of the circuit, the protection measurement of the proposal is adopted, which is more effective and safer; in addition, the starting and triggering is shut after 3 seconds, which prevents that the long-time triggering caused by the open circuit of the lamp can damage other electronic parts.

Description

technical field [0001] The invention relates to a ballast, in particular to an electronic ballast used in a high-pressure sodium lamp. Background technique [0002] The rise of the green lighting industry in the world makes electronic ballasts popular. Relevant enterprises have all spotted the huge business opportunities hidden in electronic ballasts. In particular, the energy-saving potential hidden in the high-pressure sodium lamp is more concerned by everyone. The high-pressure sodium lamp (HPS lamp) is a high-intensity gas discharge lamp (HID lamp) with excellent performance. Its advantages are high luminous efficiency, long life, and good light color. , so it is widely used. According to statistics, if all high-pressure gas discharge lamps in the country are replaced with electronic ballasts, 24.6 billion kWh of electricity can be saved throughout the year, which can solve the current 1 / 3 of the country's electricity shortage. Therefore, many designers in the field o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B41/292H05B41/288
CPCY02B20/208Y02B20/204Y02B20/00
Inventor 叶传良宋若槑
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO
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