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OUPower.com • View topic - Ignition coil circut

Ignition coil circut

Here we will discuss many topics on electronic designs and circuits for various functions. PIC Chip programming has enormous potential in so many applications, that will be included in this forum as well.

Postby kevinsatterfield » Fri Aug 10, 2007 8:31 pm

Thank You again Gary for the diodes,I havent had a chance to try them yet but Im looking forward to it.The idea I wanted to try was take the output of an ignition coil and run it thru them diodes for a rectified DC pulse...are there any precautions I shuld take to prevent damage to those diodes in use'n em this way?
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Postby kevinsatterfield » Tue Aug 14, 2007 12:12 am

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Postby kevinsatterfield » Tue Aug 14, 2007 9:37 pm

ok is it not power? is it 7,000wats of energy? ANy body ???
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Inductive discharge

Postby SeaMonkey » Wed Aug 15, 2007 4:50 pm

Kevin,

When the primary turns of the Ignition Coil are powered with the 12 Volts DC (13.8V to 14.4V) it is at a Current level of several amperes.

The Current is permitted to flow by the control circuitry until the magnetic field energy in the core of the coil is at a maximum.

Then the Primary Current is disrupted which allows the magnetic field that has been built up to collapse very rapidly.

It is the high rate of speed of the magnetic field collapse that induces a very high voltage into the Secondary Turns of the Ignition Coil which is able to produce a brief spark of several tens of milliamperes of current.

The Instantaneous Power of the spark can indeed be very high for a few microseconds. All of the Electrical Energy that had been pumped into the coil as a low voltage current in the Primary is suddenly released in a very short time as a High Voltage Low Current pulse in the Secondary.

It's approximately the same amount of energy, minus losses of the coil's copper, but it's compressed in time into a high energy burst.

Over the long term, the average power is quite low.
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Postby kevinsatterfield » Wed Aug 15, 2007 8:05 pm

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