Electronic ballast of high voltage sodium lamp

Abstract

The invention discloses an electronic ballast of a high voltage sodium lamp, and belongs to the field of electronic elements. The electronic ballast of the high voltage sodium lamp comprises a filter, a PFC rectifier, an inverter circuit, a high voltage sodium lamp, an auxiliary power supply, a control circuit and a starter, wherein an output end of the filter is connected with the PFC rectifier; the output end of the PFC rectifier is connected with the inverter circuit; two ends of the inverter circuit are connected with the high voltage sodium lamp; the starter is connected to two ends of the high voltage sodium lamp; the control circuit is respectively connected with the PFC rectifier and the inverter circuit; the auxiliary circuit is connected to the control circuit; the inverter circuit is a high-frequency inverter circuit; the frequency is 31-37KHz; the inverter circuit is also connected with a drive circuit; the driver circuit is connected with a frequency modulation control circuit. According to the electronic ballast of the high voltage sodium lamp, the acoustic resonance phenomenon in the electronic ballast of the high-frequency high voltage sodium lamp is removed, the damage to the sodium lamp is reduced, the service life of the sodium lamp is prolonged, the working frequency of the high-frequency high voltage sodium lamp is improved to 30-40KHz from 100-400Hz, the luminous efficiency is significantly improved, the energy consumption is reduced by 40%-50%.

Description

technical field [0001] The invention belongs to the field of electronic components, in particular to an electronic ballast for a sodium lamp. Background technique [0002] Xenon lamps, also known as HID gas discharge headlamps, use high-pressure xenon wrapped in quartz tubes to replace traditional tungsten filaments to provide higher color temperature and more focused lighting. Since the xenon lamp is a beam of arc light formed by activating xenon gas with high-voltage current, it can continuously discharge and emit light between two electrodes. The power of ordinary car bulbs reaches 55 watts, while the xenon lamp only needs 35 watts, which is reduced by nearly half. Xenon lamps can significantly reduce the burden on the vehicle's electrical system. The color temperature of car xenon lamps is between 4000K and 6000K, which is much higher than that of ordinary car headlight bulbs. It has high brightness. The light color of 4300K ​​xenon lamp is white to yellowish. Due to ...

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Problems solved by technology

[0004] For HID lamps, theoretically, the luminous efficiency is the highest when the operating frequency is 30-40KHz. If the sound oscillation frequency is the same, there may be sound resonance, which will cause the lamp arc to vibrate or extinguish, and cause damage to the lamp. At present, the sound resonance problem of this electronic ballast has not been well solved.

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