resistance, amps, energy
I've been thinking about the CDI resistors as well...
With a 150w inverter supplying 1.25A of power, that equates to 96ohms
of resistance, so in order to charge up the CDI cap with .5A it would
have to be increased to 240ohms, and they(it) would need to be rated
at approximately 60W, correct?
An example would be if I used one of my 250V 22uF caps... I've really got no
idea what one of these would require in the way of amperage to hold a proper
charge with the motor firing at 2000rpm. If I use 240ohms and it turns out
to be too much, is there a danger of having it melt or explode?
The following calculations will show that such a capacitor will contain
687.5 Joules of energy if fully charged, equating to the same amount of 120v
watts drawing 5.73A! Surely this is not a true representation of what amount
of power would need to be applied. Mysterious.
I've been thinking about the CDI resistors as well...
With a 150w inverter supplying 1.25A of power, that equates to 96ohms
of resistance, so in order to charge up the CDI cap with .5A it would
have to be increased to 240ohms, and they(it) would need to be rated
at approximately 60W, correct?
An example would be if I used one of my 250V 22uF caps... I've really got no
idea what one of these would require in the way of amperage to hold a proper
charge with the motor firing at 2000rpm. If I use 240ohms and it turns out
to be too much, is there a danger of having it melt or explode?
The following calculations will show that such a capacitor will contain
687.5 Joules of energy if fully charged, equating to the same amount of 120v
watts drawing 5.73A! Surely this is not a true representation of what amount
of power would need to be applied. Mysterious.
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