ingineria iluminatului - Journal of Lighting Engineering - Prof. Florin ...

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4.4 LED 62 W luminaire The LED luminaire is manufactured by GreenLux (62 W GLP 6060-30 Lighting Panel), and it is driven by a PWM driver. The dimming levels (2÷8) are appointed by manufacturer, and the selection between different levels is done with the use of a remote control. The measurement results are presented in Table 4. Figure 6 shows the amplitude variation of the current harmonics of the light source during the Office lighting with old and new light sources dimming process (a), and the voltage and current wave-shapes (b). As the light output is decreased, the current amplitude, the active power, the apparent power, the reactive power and the power factor have lower values. The increased values of THDI are due mostly to the decrease of the fundamental current harmonic amplitude - Figure 6 (a). The voltage level, CRI and CCT do not vary during dimming. Table 4 Electric and luminous parameters at different dimming levels Parameter Unit Not dimmed 1 Dimming levels, set by the remote control 2 3 4 5 6 7 8 Active power W 62.3 48.4 35.8 27.7 18.7 9.5 7.4 0.7 Reactive power VAR 19.2 18.5 17.8 16.1 14.5 12.8 11.5 6.8 Apparent power VA 65.2 51.8 40.1 32.1 23.7 16.0 14.0 6.8 Voltage amplitude V 230 230 230 230 230 230 230 230 Current amplitude A 0.283 0.225 0.174 0.139 0.103 0.07 0.06 0.03 Frequency Hz 50 50 50 50 50 50 50 50 Power factor 0.956 0.93 0.89 0.86 0.79 0.60 0.54 0.10 THDI % 11.45 15.85 18.61 26.20 37.37 41.58 40.31 0.40 Luminous flux lm 3460 2840 2200 1700 1150 530 400 0 CRI 56 56 56 56 56 56 56 - CCT K 3000 3000 3000 3000 3000 3000 3000 - Luminous efficacy lm/W 55.54 58.68 61.45 61.37 61.50 55.79 54.05 - (a) (b) Figure 6 The amplitude variation of the current harmonics of the light source during the dimming process (a), and the voltage and current wave-shapes (b): voltage wave-shape - yellow; current wave-shape for the not dimmed case (level 1) - dark blue, and for the mentioned dimming levels (level 2 - purple; level 3 - aqua blue; level 4 - brown; level 5 - orange; level 6 - green; level 7 - blue; level 8 – white). Ingineria Iluminatului 2010; 12, 2: 5-22 13
H C. ALBU, Liisa HALONEN, E TETRI, F POP 4.5 LED 12 W Thorn luminaire Next, a 12 W LED luminaire, manufactured by Thorn (BaseLed 165 MRE 1x12 W LED) has been tested; the dimming process was achieved with the use of a triac dimmer (CO/TECH EMD 200, 40-300 W, 230 V). The electric, luminous and power quality characteristics are presented in Table 5. Figure 7 shows the amplitude variation of the current harmonics of the light source during the dimming process (a), and the voltage and current wave-shapes (b) for the not dimmed case and dimmed at different voltage levels, with the employment of the triac dimmer. The CRI and CCT do not suffer variations during dimming. The odd current harmonics have increased amplitudes (especially the third order), as the voltage amplitude is decreased. Table 5 Electric and luminous parameters Parameter Voltage level, % of fundamental Unit Not dimmed 100 75 50 Active power W 11.8 11.6 8 5.6 Reactive power VAR 5.4 4.8 12.3 7.1 Apparent power VA 13 12.5 14.6 9 Voltage amplitude V 230 229.3 172.5 112.6 Current amplitude A 0.056 0.054 0.085 0.08 Frequency Hz 50 50 50 50 Power factor 0.92 0.92 0.55 0.62 THDI % 22.34 28.46 65.70 94.28 Luminous flux lm 640 638 330 195 CRI 96.4 96.4 96.4 96.4 CCT K 3450 3450 3450 3450 Luminous efficacy lm/W 54.24 55.00 41.25 34.82 (a) (b) Figure 7 The amplitude variation of the current harmonics of the light source during the dimming process (a), and the voltage and current wave-shapes (b): for the not dimmed case (voltage wave-shape – yellow, current wave-shape – light yellow), and for the mentioned voltage levels, with the employment of the triac dimmer (100% of input voltage: voltage wave-shape – orange, current wave-shape – light orange; 75% of input voltage: voltage wave-shape – blue, current wave-shape – light blue; 50% of input voltage: voltage wave-shape – green, current wave-shape – light green). 14 Ingineria Iluminatului 2010; 12, 2: 5-22
Page 1 and 2: INGINERIA ILUMINATULUI Volume 12, N
Page 3 and 4: Universitatea Tehnică din Cluj-Nap
Page 5 and 6: fluorescent tubes and noval, solid
Page 7 and 8: H C. ALBU, Liisa HALONEN, E TETRI,
Page 13: H C. ALBU, Liisa HALONEN, E TETRI,
Page 25 and 26: C BIANCHI, Andreea BIRO Buildings d
Page 27 and 28: C BIANCHI, Andreea BIRO Modern stru
Page 29 and 30: C BIANCHI, Andreea BIRO dim electri
Page 31 and 32: C BIANCHI, Andreea BIRO illuminance
Page 34 and 35: INFLUENCE OF THE ROAD SURFACE ON TH
Page 36 and 37: Influence of the road surface on th
Page 44 and 45: Table 5 presents the values of inst
Page 46 and 47: ASSESSMENT OF DAYLIGHT TRANSPORT CA
Page 48 and 49: Assessment of daylight transport ca
Page 56 and 57: Ingineria Iluminatului 2010; 12, 2:
Page 58 and 59: Rogier van DER HEIDE, Philips Light
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Page 62 and 63: LED’s - Are we there yet? Writing
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(discussed in later section), and a
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lamps from the market (and mainly i
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Ingineria Iluminatului 2010; 12, 2:
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There are two highlights: the INGIN
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Ingineria Iluminatului 2010; 12, 2:
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This issue is sponsored by EnergoBi
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