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Compact sine constant-current dimming device

A constant-current dimming, compact technology, applied in lighting devices, output power conversion devices, light sources, etc., can solve the problems of low power density, complex main circuit topology and control methods, and low system reliability. The effect of less harmonic content, simple structure and less harmonic pollution

Active Publication Date: 2014-04-23
NO 719 RES INST CHINA SHIPBUILDING IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the problems of the existing AC/AC chopping sinusoidal constant current dimming scheme, the main circuit topology and control mode are complicated

Method used

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  • Compact sine constant-current dimming device
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  • Compact sine constant-current dimming device

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Example Embodiment

[0039] The technical solutions of the present invention will be further described below with reference to the accompanying drawings.

[0040] figure 1 A compact sinusoidal constant current dimming device according to an embodiment of the present invention is shown. In this embodiment, the rated power of the compact sinusoidal constant current dimming device is 15kVA, and the switching frequency of the insulated gate bipolar transistor is 10kHz. The compact sinusoidal constant current dimming device includes a digital signal processing unit, a drive circuit, an input filter circuit, an AC chopper circuit, an output filter circuit, and an isolation booster transformer. The AC chopper circuit includes: a forward transmission circuit and a rear to the transmission circuit.

[0041] like figure 1 As shown, the circuit includes an input filter inductor L1, an input filter capacitor C1, insulated gate bipolar transistors T1, T2, T3, T4 constituting a bidirectional chopper switch, an...

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Abstract

The invention relates to a compact sine constant-current dimming device which comprises a digital signal processing unit, a drive circuit, an input filter circuit, a AC-AC chopper circuit, an output filter circuit and an isolation step-up transformer, wherein the AC-AC chopper circuit includes a forward transmission circuit and a backward transmission circuit. The invention provides an easy-to-realize compact AC-AC chopper sine constant-current dimming scheme in order to solve the problem that an AC-AC chopper sine constant-current dimming scheme of a common-collector bidirectional switch structure has the defects of complex structure and control mode, low system reliability, low power density and the like. According to the scheme, high-frequency chopping control is carried out on an input alternating-current constant voltage source, high-precision constant-current output is realized, and the device has the advantages of compact structure, stable and reliable work and easy power unit modularization.

Description

technical field [0001] The invention relates to the technical field of power electronics engineering, in particular to a symmetrically structured compact AC / AC chopping sinusoidal constant current dimming device. Background technique [0002] People who work in a closed environment have been working and living in the space for a long time, and their visual acuity and work efficiency are reduced. A lighting system with dimming function can provide adequate illuminance while providing workers with appropriate visual stimulation, maintain their visual acuity, and significantly reduce energy consumption. [0003] At present, there is a distributed dimming scheme with built-in low-voltage and low-power dimming devices in lighting fixtures. The problem with this scheme is that the working current of the lamps is difficult to be completely consistent, and there are differences in illuminance between lamps. In addition, the structure of the entire lighting system is complex, and it...

Claims

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Application Information

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IPC IPC(8): H02M5/293H02M1/12H05B37/02
Inventor 欧阳晖蔡凯吴浩伟李小谦周樑徐正喜陈涛魏华姚川李鹏姜波李可维邢贺鹏金惠峰罗伟耿攀孙朝晖谢炜吴大立李兴东余跃听雷津袁阳
Owner NO 719 RES INST CHINA SHIPBUILDING IND
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