US Patent 8659896 Cooling apparatuses and power electronics modules

A cooling apparatus for a power electronics system includes a jet plate, a target plate, a plurality of fluid collection passageways, and a fluid outlet. The jet plate includes an array of impingement jets having a jet body and an impingement jet channel. The target plate includes an array of microchannel cells having a plurality of radially-extending wavy-fin microchannels. The coolant fluid is directed toward an impingement location through the array of impingement jets and travels through the wavy-fin microchannels. The plurality of fluid collection passageways are arranged in a grid pattern such that the coolant fluid exits the wavy-fin microchannels and flows into the plurality of fluid passageways. The coolant fluid exits the cooling apparatus through the fluid outlet. The cooling apparatus may be incorporated into a power electronics module having a power electronics device to cool the power electronics device.