Designing dimmable electronic ballast with frequency control

Moo, C.S.; Cheng, Hong; Chen, H.N.; Yen, Hau-Chen

doi:10.1109/apec.1999.750441

Cited by 51 publications

(13 citation statements)

References 13 publications

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“…In practice, the lamp arc can be considered as a resistor in high frequency operation ( 20 kHz) [8]. The equivalent lamp resistance is defined by , where is the RMS value of the lamp voltage and is the RMS value of the lamp current.…”

Section: A Brief Summary Of Single Sensor Estimation Techniquementioning

confidence: 99%

“…However, the on-state voltage of these lamps after full ignition is typically less than or around 100 V. The wide range of lamp arc voltage makes it difficult or expensive to install voltage sensor across the lamp directly if the lamp arc condition has to be monitored continuously. For evaluation of various dimming techniques [5], [7], [8], the monitoring of the lamp arc condition and other system parameters is essential. As the lamp arc characteristic is nonlinear and varies with temperature and working life, closed-loop control with lamp power feedback could be a better approach to obtain stable lamp arc operation.…”

Section: Introductionmentioning

confidence: 99%

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Parameter Monitoring of High-Frequency Electronically Operated Discharge Lamp Systems

Qiu

Hui²,

Chung³

2005

IEEE Trans. Power Electron.

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Discharge lamps require high ignition voltage from typically one to several kilovolts for cold-start, but have low onstate voltage of typically 100 V. For discharge arc monitoring purposes, it is difficult or uneconomical to implement voltage sensor to cover such a wide range of voltage. In this paper, a nonintrusive and electrically isolated method, based on the single-sensor principle, is used to derive the system parameters and variables for system monitoring and control purposes. Unlike the traditional resistive potential divider for voltage feedback, the proposed method is nondissipative. Only one coupled winding is used to derive the converter inductor voltage, from which the lamp power, lamp arc resistance and inverter dc link voltage can be accurately derived. The proposal is verified with good agreement between derived values and measurements in an electronic ballast-fluorescent lamp system. The proposal can be useful in applications in which sensing the voltage across the load is either difficult or costly.

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Section: A Brief Summary Of Single Sensor Estimation Techniquementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Parameter Monitoring of High-Frequency Electronically Operated Discharge Lamp Systems

Qiu

Hui²,

Chung³

2005

IEEE Trans. Power Electron.

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“…The variable switching frequency control is popularly used in practical implementation because of its simplicity [10][11][12][13][14][15][16][17]. When the switching frequency is located further away from the resonance of the tank, less energy is coupled to the lamps, and the lamps dim.…”

Section: Variable Switching Frequency Controlmentioning

confidence: 99%

General Discussion on Dimming Control Method Used for Discharge Lamp

Dong

Cheng

et al. 2006

2006 2nd International Conference on Power Electronics Systems and Applications

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“…For the lamp that needs to use a power converter to operate, the control parameter can be classified variable switching frequency control, dynamic duty-ratio control and dynamic bus voltage control. The variable switching frequency control is popularly used in practical implementation because of its simplicity [4][5][6][7][8]. When the switching frequency is located further away from the resonance of the tank, the resonance energy stored in the tank is less and hence less energy is coupled to the lamps, and the lamps dim.…”

Section: Introductionmentioning

confidence: 99%

Research on dimming control method of electronic ballast for the automotive HID headlight

Dong

Cheng

2008

2008 13th International Power Electronics and Motion Control Conference

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It is the purpose of this paper to explore the problem of dimming the HID lamp used in the automotive headlight system. To investigate the relationship between the lamp power and control parameters, a power-dependent HID lamp model is established in this paper. The two methods, dynamic duty-ratio control and dynamic bus voltage control, are analyze and applied in the system. The dynamic bus voltage control which can be realized according to the structure of controller is stressed in this paper. The simulation results and experimental results give the difference between the different dimming control methods.

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Designing dimmable electronic ballast with frequency control

Cited by 51 publications

References 13 publications

Parameter Monitoring of High-Frequency Electronically Operated Discharge Lamp Systems

Parameter Monitoring of High-Frequency Electronically Operated Discharge Lamp Systems

General Discussion on Dimming Control Method Used for Discharge Lamp

Research on dimming control method of electronic ballast for the automotive HID headlight

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