- #71
trini
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well, considering that i only need 150 A, isn't there some way i could get that kind of current without needing the capacitors at all?
trini said:ok i have updated the design.
i will use 14 car batteries in series to get to 168 V DC. The coil will be 4 cm long, 5 layers high, making the N/l ratio 5000 using 1 mm wire[(40 x 5)/0.04]. This equates to a 9.69 Ohm resistance, making the current through my coil 17.337 A.
17.337 x 168 = 2913 J/s = 174,752 J/min
the volumetric heat capacity of copper is 3.45 J/cm^3/K
Using l = 367 m, r = 0.0005 m
c = 12,661 J/K
By holding the current while i heat the powder, i will get an even stronger final B field in my magnet. I need to heat the powder to 200 C throughout but not over that, then let it cool. I can quickly heat up the metal using an IR lamp
so if i run my Current for 1 minute, this will equate to a 13.8 K rise in my coils.
I will use jumper cables to connect the coil to the batteries, and heat the powder using a magnetron. I will need to perform tests to determine heating rates of the magnetron, what would be the best way to measure the core temperature of my powder? i was thinking a digital thermometer with a probe may work, but i need something that will give me fast readouts, as i can't let the powder get even 1 degree above 200( i may just heat to about 190 to be safe, i only need to get it to 175, to work, but 200 is optimum)
trini said:... Now this implies(since I'm using DC) that i need a voltage or 564 V.
Any ideas on a DC power supply to drive this thing?
564V 2.4 A(minimum)
Please also see my edits above.trini said:Oh no this isn't for the capacitors, I'm using dc to magnetise the material, so you gave me my answer in your first paragraph lol, thanks!
The required capacitance can be calculated using the formula C=I*t/V, where C is the capacitance in Farads, I is the current in Amperes, t is the pulse duration in seconds, and V is the voltage in Volts. In this case, the required capacitance would be 16000 A * t / V.
The maximum voltage that the capacitor bank can handle depends on the individual capacitors used in the bank. It is important to choose capacitors with a voltage rating that is higher than the expected voltage of the pulse. It is also recommended to have a safety margin of at least 20% to prevent damage to the capacitors.
Proper connection and discharge of the capacitors is crucial to prevent damage to the bank and ensure accurate pulsing. It is important to follow the manufacturer's instructions for connecting the capacitors in parallel and to use appropriate discharge resistors to safely discharge the bank before pulsing.
The capacitor bank can be used for both continuous pulsing and short bursts, depending on the design and specifications of the capacitors used. It is important to choose capacitors with a high pulse discharge rating for continuous pulsing applications.
To protect the capacitor bank from overcharging, it is important to use a charging circuit with a voltage regulator and to monitor the voltage during pulsing. Overheating can be prevented by choosing capacitors with a high pulse discharge rating and by ensuring proper cooling and ventilation of the bank.