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 18:47:28 +01:00
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Push-pull configuration with two 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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Double cascade is used with 16 capacitors and 16 BY6 diodes (8 of each per side).
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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, 2x3-turn primary
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freq 3.70 7.40
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------------------
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1k 2.51 3.89
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2k 3.62 6.09
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3k 4.23 7.95
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4k 4.65 9.18
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5k 4.91 9.77
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6k 5.08 10.16
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7k 5.19 10.35
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8k 5.24 10.47
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9k 5.28 10.56
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10k 5.29 10.61
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15k 5.09 10.46
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20k 4.70 10.02
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25k 4.38 9.58
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30k 4.16 9.20
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35k 4.09 9.13
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Max power @10kHz / 3.7V = 2.00W
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Max power @10kHz / 7.4V = 7.39W
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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 4.46 8.60
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2k 5.51 11.88
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3k 6.12 15.20
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4k 6.31 17.60
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5k 6.43 18.15
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6k 7.11 19.82
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7k 6.60 21.93
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8k 6.26 22.05
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9k 6.81 22.74
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10k 7.67 14.76
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15k 5.50 11.95
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20k 5.70 13.29
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25k 6.58 15.33
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30k 7.68 17.28
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35k 9.08 18.78
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40k 10.23 18.05
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45k 11.35 17.15
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50k 11.38 16.33
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55k 9.73 14.77
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60k 6.97 12.40
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Max power @45kHz / 3.7V =2.68W
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Max power @ 9kHz / 7.4V =W
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