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Old 08-18-2014, 12:17 AM   #923 (permalink)
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Originally Posted by MPaulHolmes View Post
Have the low side be the low side switch in the boost converter. The inductor connects to the collector of the low side switch. Now, the high side IGBT has the diode built in from high side emitter to high side collector. That's the regular diode in the boost converter. The high side switch is what allows the regen to go to the batteries. During regen, low side IGBT off, and high side IGBT on with 100% duty.
I attached a captured image from the AEVA discussion.

The low side is D, high side is U. During regen, D is off, and U is On, as you describe above, right?

Would that put a large over-voltage on the battery terminals? Or would the voltage 'drop' across the IGBT with the large currents involved? Or did I hijack the wrong diagram?
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