Forced oscillation in LC circuit used for the ignition of discharge lamps

Morais, Lenin Martins Ferreira; Donoso-Garcia, P.F.; Seleme, Seleme Isaac; Cortizo, P.C.

doi:10.1049/iet-pel:20060465

Cited by 4 publications

(4 citation statements)

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“…The proposed ignition circuit is based on a parallel resonant circuit. The parallel resonant circuit is excited with an external periodic voltage square wave through an inverter [26]. The voltage amplitude is V dc , and voltage frequency, ign , is close to the resonance frequency of the circuit depicted in Figure 5.…”

Section: Ignition Circuitmentioning

confidence: 99%

“…The lobe amplitude is determined from the standard ignition voltage of the lamp. The lobe duration is a consequence of the prespecified number of ignition trials [26].…”

Section: Ignition Circuitmentioning

confidence: 99%

“…The gain G mod in (2) is equal to 0.5, due to the amplitude modulation of the signals. The procedure for designing the ignition circuit is as follows [26].…”

Section: Ignition Circuitmentioning

confidence: 99%

“…For F ign = 73 kHz, the DC link voltage is 120 V, whereas for F ign = 67 kHz, the DC link voltage is 250 V. The ignition is performed with the same inverter circuit of the steady state operation. It is based on the forced oscillation (beating) of the voltage frequency [26]. All the tests in the lamps were performed in regions where acoustic resonance occurs, following the procedures adopted in [16] and, in none of the tests this phenomenon was observed.…”

Section: Table III Comparison Of the Modulation Indexes Of Simulationmentioning

confidence: 99%

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Harmonics Injection in Hps Electronic Ballast With Modulation Index Control

Morais¹,

Donoso-Garcia²,

Júnior³

et al. 2013

Eletrônica de Potência

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The modulation index control is used in this work to control the lamp power supply permitting the removal of the output transformer out of the inverterresonant filter setup. The Acoustic resonance in HPS lamps can be avoided by using a controlled PWM inverter and third harmonic injection.Experimental and simulation results are shown for the control of the inverter power subject to variation in the input voltage. Results for different DC bus voltages are also provided which attest the transformer removal and avoid the acoustic resonance with different modulation indexes. An ignitor for high-intensity discharge lamps, based on forced oscillation via an external periodic voltage square wave, supplied by a digitally controlled inverter, is also presented. The crest factor of the current can also be reduced by this approach.1

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Section: Ignition Circuitmentioning

confidence: 99%

“…The lobe amplitude is determined from the standard ignition voltage of the lamp. The lobe duration is a consequence of the prespecified number of ignition trials [26].…”

Section: Ignition Circuitmentioning

confidence: 99%

“…The gain G mod in (2) is equal to 0.5, due to the amplitude modulation of the signals. The procedure for designing the ignition circuit is as follows [26].…”

Section: Ignition Circuitmentioning

confidence: 99%

Section: Table III Comparison Of the Modulation Indexes Of Simulationmentioning

confidence: 99%

See 2 more Smart Citations