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Electrodeless lamp dimming circuit and method

A dimming circuit, electrodeless lamp technology, applied in the direction of light source, electric light source, electrical components, etc., can solve the problem of inability to accurately control the power of the electrodeless lamp in a large range, and achieve the effect of avoiding loss of control and accurate control.

Inactive Publication Date: 2014-06-11
上海微桥电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The electrodeless lamp dimming circuit and dimming method provided by the embodiments of the present invention solve the problem in the prior art that the power of the electrodeless lamp cannot be accurately controlled in a wide range

Method used

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  • Electrodeless lamp dimming circuit and method
  • Electrodeless lamp dimming circuit and method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] An embodiment of the present invention provides a dimming circuit for an electrodeless lamp, including: an input filter, a power factor correction PFC main power circuit and an inductance-capacitor LC inverter circuit, wherein the output terminal of the input filter and the PFC main power circuit The input terminals of the power circuit are connected, the output terminal of the PFC main power circuit is connected with the input terminal of the LC inverter circuit, and the electrodeless lamp dimming circuit also includes a microcontroller MCU, a voltage regulating device, and a frequency regulating device and the dimming signal circuit, the input end of the MCU is connected to the output end of the dimming signal circuit, the output end of the MCU is connected to the input end of the voltage regulating device, and the output of the voltage regulating device terminal is connected with the input terminal of the PFC main power circuit, the output terminal of the MCU is conne...

Embodiment 2

[0064] In the embodiment of the present invention, a simple microcontroller (MCU) is used to obtain the dimming signal, and the signal is analyzed, and then the operating frequency of the LC inverter circuit is adjusted through the frequency modulation circuit, and the output voltage of the PFC is adjusted through the voltage regulation circuit. Such as Figure 5 as shown,

[0065] An embodiment of the present invention provides a dimming circuit for an electrodeless lamp, including an input filter, a PFC main power circuit, an LC inverter circuit, an MCU, a frequency modulation circuit, a first control circuit, a voltage regulation circuit, a second control circuit and a dimming Signal circuit, wherein the input end of the MCU is connected to the output end of the dimming signal circuit, one output end of the MCU is connected to the input end of the frequency modulation circuit, and the other output end of the MCU is connected to the input end of the voltage regulation circui...

Embodiment 3

[0069] The MCU that receives the dimming signal controls the LC inverter circuit at the same time. After receiving and analyzing the dimming signal, the MCU directly controls the LC inverter circuit and at the same time sends out the PFC voltage regulation signal to adjust the output voltage of the PFC through the voltage regulation circuit. Figure 6 Shown:

[0070] An embodiment of the present invention provides a dimming circuit for an electrodeless lamp, including an input filter, a PFC main power circuit, an LC inverter circuit, an MCU, a voltage regulating circuit, a second control circuit and a dimming signal circuit, wherein the input of the MCU The terminal is connected to the output terminal of the dimming signal circuit, one output terminal of the MCU is connected to the input terminal of the LC inverter circuit, the other output terminal of the MCU is connected to the input terminal of the voltage regulating circuit, and the output terminal of the voltage regulating...

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Abstract

The embodiment of the invention discloses an electrodeless lamp dimming circuit and method. The method comprises the following steps: an MCU (Microprogrammed Control Unit) is used for receiving the dimming signals sent by a dimming signal circuit; when the dimming signals indicate that the power of the electrodeless lamp needs to be adjusted to be smaller than a preset value, the MCU adjusts the work frequency of an LC inverter, and the power of the electrodeless lamp is reduced to be the preset value of the rated power of the electrodeless lamp, the adjustment of the LC inverter is stopped; and the MCU adjusts the output voltage of PFC (Power Factor Correction) so as to continue to reduce the power of the electrodeless lamp. By applying the diming circuit and method, not only is the diming range of the electrodeless lamp expanded, but also the accurate control on the dimming of the electrodeless lamp is realized.

Description

technical field [0001] The invention relates to the field of electrodeless lamps, in particular to an electrodeless lamp dimming circuit and a dimming method. Background technique [0002] The electrodeless electromagnetic induction lamp is referred to as the electrodeless lamp for short. Its advantages include long life, high luminous efficiency, high power factor, stable luminous flux output, high reliability, high color rendering, low harmonic content, low temperature fast start, wide Color temperature range, instant restart, no flicker and no glare. The benefits that the application of electrodeless lamps can bring to users include high efficiency and energy saving, greatly reducing the cost of lamp replacement, and reducing maintenance costs. Electrodeless lamps are considered to be one of the most promising light sources in the future. [0003] The logic function diagram of the composition of the electrodeless lamp ballast is as follows figure 1 As shown, after the p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B41/36
Inventor 张培忠
Owner 上海微桥电子科技有限公司