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Home >> Cadillac >> 2009 >> Escalade Base, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 3 (Hybrid Engine Controls - Introduction) >> Description and Operation >> Electromagnetic Compatibility Description >> Electromagnetic Compatibility (EMC) >> Circuit Design

Circuit Design

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The drive motor generator power inverter module (PIM) and the accessory DC power control module assembly (APM) each contain filter capacitors connected to the high voltage circuits. These capacitors are necessary to reduce the voltage spikes that occur as a result of the switching of current On and Off. Reducing voltage spikes reduces EMI. The frequency of current switching is also closely regulated. Too high a frequency can cause an increase in EMI generation.

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