2025-01-22 19:21:18 +01:00
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freq - frequency in Hz
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3.70 - excitation from one battery (3.7V)
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7.40 - excitation from two batteries in series (7.40V)
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In no case the current from excitation is allowed to go above 2A. In no experiment the current is observed to be above 1.5A.
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The results in tables are output voltages measured at 1000:1 HV probe, hence the output voltage is given in kV.
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2025-01-25 18:46:19 +01:00
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Flyback configuration with TIP122 NPN transistor with 330 Ohms resistor in base is used.
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2025-01-22 19:21:18 +01:00
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Single cascade is used with 30 capacitors and 60 (30x two-in-series) diodes 1N4007.
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Power supplied by RIGOL DP832 at frequency for max output DC voltage is measured, too.
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ETD49 core with 4 isolated layers as secondary, no gaps and 3-turn primary
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freq 3.70 7.40
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------------------
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1k 4.52 8.42
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2k 6.67 12.47
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3k 7.76 14.78
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4k 8.80 16.75
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5k 9.35 17.23
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6k 9.60 18.31
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7k 9.85 18.82
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8k 9.71 18.87
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9k 9.53 18.75
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10k 9.49 18.75
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15k 9.01 18.40
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20k 8.68 18.11
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25k 8.13 17.38
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30k 7.50 16.44
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35k 6.77 15.35
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Max power @7kHz / 3.7V = 1.01W
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Max power @7kHz / 7.4V = 4.08W
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ETD49 core with 4 isolated layers as secondary, no gaps and 1-turn primary
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freq 3.70 7.40
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------------------
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1k 1.32 3.83
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2k 1.90 4.90
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3k 1.87 5.31
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4k 2.91 7.67
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5k 2.46 6.33
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6k 2.17 6.45
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7k 1.87 6.36
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8k 2.18 7.38
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9k 2.99 9.84
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10k 4.36 13.49
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12k 9.04 18.61
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15k 6.71 14.17
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20k 2.69 7.21
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25k 1.39 3.97
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30k 0.85 2.36
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35k 0.55 1.34
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Max power @13kHz / 3.7V = 1.84W
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Max power @12kHz / 7.4V = 8.07W
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ETD49 with 4 isolated layers as secondary, 100um gaps and 3-turn primary
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freq 3.70 7.40
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------------------
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1k 3.10 7.08
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2k 4.19 9.53
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3k 4.88 11.13
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4k 5.38 12.29
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5k 5.68 13.05
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6k 6.09 13.92
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7k 6.90 15.44
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8k 6.91 15.39
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9k 6.62 14.84
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10k 6.84 15.33
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15k 7.88 17.61
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20k 9.07 19.35
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24k 8.88 18.59
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25k 8.83 18.19
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30k 7.67 15.57
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35k 6.08 11.83
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Max power @20kHz / 3.7V = 0.88W
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Max power @20kHz / 7.4V = 4.11W
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ETD49 core with 4 isolated layers as secondary, 100um gaps and 1-turn primary
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freq 3.70 7.40
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------------------
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1k 0.71 2.22
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2k 1.11 2.78
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3k 1.10 3.01
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4k 1.06 3.22
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5k 1.39 4.11
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6k 1.05 3.68
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7k 2.10 4.72
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8k 3.56 8.13
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9k 1.44 4.37
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10k 1.44 4.20
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15k 1.41 4.19
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20k 4.41 9.17
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24k 11.01 19.46
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25k 9.25 16.53
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30k 2.32 4.81
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35k 1.12 1.84
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Max power @20kHz / 3.7V = 1.80W
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Max power @20kHz / 7.4V = 8.17W
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ETD49 core with one layer secondary, no gaps and 1-turn primary)
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freq 3.70 7.40
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------------------
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1k 1.08 4.11
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2k 1.57 5.79
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3k 1.86 7.35
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4k 2.15 8.25
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5k 2.25 8.87
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6k 2.37 9.38
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7k 2.50 9.55
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8k 2.07 9.49
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9k 4.43 12.20
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10k 4.41 12.36
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15k 8.13 12.31
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20k 7.70 14.44
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25k 7.19 13.45
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30k 6.67 12.51
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35k 6.46 12.45
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Trafo #2 (Git repository > Hardware development > 4-HV > Trafos)
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freq 3.70 7.40
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------------------
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1k 0.61 1.61
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2k 0.87 2.22
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3k 0.93 2.35
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4k 1.12 2.43
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5k 1.07 3.47
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6k 1.88 3.48
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7k 1.37 3.28
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8k 1.22 3.16
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9k 1.27 3.63
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10k 1.18 4.41
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15k 2.10 4.27
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20k 5.13 6.52
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25k 3.49 9.03
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30k 2.21 6.10
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35k 1.47 3.97
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Trafo #3 (Git repository > Hardware development > 4-HV > Trafos)
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freq 3.70 7.40
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------------------
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1k 4.55 11.21
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2k 6.84 15.02
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3k 7.93 17.17
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4k 9.02 18.50
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5k 9.63 19.21
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6k 10.01 19.75
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7k 10.14 20.03
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8k 9.94 20.05
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9k 11.10 21.15
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10k 9.86 22.19
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15k 8.97 20.67
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20k 8.81 20.98
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25k 7.44 18.47
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30k 7.60 16.05
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35k 8.90 17.44
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Max power @11kHz / 3.7V = 1.10W
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Max power @12kHz / 7.4V = 4.41W
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Trafo #1 (Git repository > Hardware development > 4-HV > Trafos)
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!During the testing (above 7kV at the output of the cascade) the trafo experiences interalbreakdowns that can be heard!
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freq 3.70 7.40
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------------------
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1k 2.33 4.06
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2k 3.18 5.49
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3k 3.53 6.02
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4k 3.81 6.63
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5k 4.54 7.67
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6k 4.90 8.91
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7k 4.38 8.07
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8k 4.43 6.92
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9k 4.75 7.53
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10k 5.33 8.63
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15k 6.73 12.86
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20k 8.59 14.52
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25k 7.40 12.37
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30k 5.51 8.83
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35k 4.19 5.90
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