PCIM 2016 Matt Reeves

Wolverine has 100+ years history with decades long customer partnerships.

In 1935, Wolverine invented the first high performance heat transfer tubes and

revolutionized the HVAC commercial chiller industry.

Wolverine is the premier heat transfer design partner for OEM’s like Carrier, Trane, Parker,

York.

Global core markets served: HVAC, Refrigeration & Appliance, Water Heater/Boiler,

Process & Chemical, Electronics Cooling.

MicroCool a Division of Wolverine Tube Inc.

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MicroCool Division

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Wolverine® MDT Enhanced Tube MicroCool®

MDT Enhanced Flat Plate

The MicroCool® division has leveraged Wolverine’s MDT tube surface enhancement technologies and transferred the

technology to flat plates.

This technology is used to create baseplates for power electronics, liquid cooled coldplates, two phase evaporators,

micro-channel surfaces and much more.

In 2013 Microcool launched a catalog line of standard liquid cooled coldplates specifically for the cooling of power

electronics, as well as a free on-line coldplate simulator.

Today MicroCool continues to innovate and now has the best performing mass produced coldplates on the market.

Through smart design and complementary core technologies MicroCool coldplates are also the most cost effective.

MicroCool Core Technologies: Micro Deformation Technology (MDT)

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Micro Deformation works like a plow in a field: Our patented

tooling moves through ductile materials (typically aluminum

or copper) to create fins and pin fins without wasting material

or scrap.

Fin pattern range:

• Density: 10-100 fins per inch.

• Fin thickness: fin thickness = gap

• Fin Height: 0.5-6mm

Pin pattern range:

• Density: 10-25 fins per inch

• Pin thickness: 1.2 - 0.5mm dia and min gap

• Pin Height: 1-8mm

• Pin pattern is “in line” and not staggered

In line pin fin 12fpi

In line pin fin 20fpi (XP)

MicroCool Core Technologies: Friction Stir Welding (FSW)

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Friction Stir Welding (FSW) is a solid state joining process, meaning frictional heat is generated

between the wear-resistant welding tool, and the material of the work pieces. Joining the work pieces

together while staying below the melting point. This creates a leak proof seal that is stronger and

more reliable than any other cold plate joining method.

MicroCool® has become the expert in friction stir welding high conductivity 1100 series aluminum

MDT™ pin plates into all types of machined, extruded and cast aluminum alloys.

MicroCool Products

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Standard IGBT Coldplates Custom Coldplates

Thermosiphons 2 Phase Evaporators MDT Fin/Pin Plates

Standard Coldplates: 3000 Series Overview

CFD balanced parallel cooling

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The 3000 series coldplates are designed to fit the 10 most common IGBT form factors and layouts on the market today. They can however be easily customized to fit your need. By combining Extruded ‘tubs’, MDT pin fin inside and FSW construction, we can achieve the highest performing, and most cost effective coldplate available today.

Standard Coldplates: 3000 Series Models & Pricing

MDT™ In Line Pin Fin Options:

4mm tall standard in line pin fin (1mm dia/gap)

4mm tall extra performance (XP) in line pin fin

(0.5 dia/gap)

Fitting Options: 3/8 NPT G3/8 (BSPP) SAE-6

Electroless Nickel Plating inside and out for fluid

compatibility

Coldplate length options: Extrusions can be cut to

any length, to accommodate multiple IGBT modules.

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*Call for volume pricing

Custom Coldplates

Double Sided

Cast

Large Assemblies

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Custom Extrusions

Coldplate Comparison

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Common aluminum

with pressed in

copper tube:

MicroCool FSW

Coldplate with MDT

inside.

Testing Equipment

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Coolant 50/50 WEG

Temperature Measurement location

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The goal was to measure the

maximum coldplate surface

temperature

Mock IGBT Heater Blocks

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14

Results

New Block F/P

Flow Rate PD CP3001 PD CP-Copper Pipe

CP3001 VS CP-Copper Pipe

3 0.023 0.089 6 0.051 0.34 9 0.076 0.74

12 0.14 1.3

15 0.21 1.46

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

3 6 9 12 15

Pre

ssu

re D

rop

(b

ar)

Flow Rate (L/min)

Pressure Drop

CP3001 - New block CP-CopperPipe

New Block F/T

Flow Rate TR(℃/W) CP3001 TR(℃/W) CP-CopperPipe

CP3001 VS CP-Copper Pipe

3 0.04 0.058

6 0.027 0.038

9 0.021 0.03

12 0.018 0.025

15 0.017 0.024

0

0.01

0.02

0.03

0.04

0.05

0.06

0.07

3 6 9 12 15The

rmal

Re

sist

ance

(℃

/W)

Flow Rate (L/min)

Thermal Resistance

CP3001 - New block CP-CopperPipe

MicroCool VS Copper Tube Coldplate

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3X

4.4X

5.7X

5.9X 4.7X

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

3 6 9 12 15

Flow Rate (l/min)

Pressure Drop (Bar)

MicroCool Copper Tube

33%

34% 30% 24% 29%

0

0.01

0.02

0.03

0.04

0.05

0.06

0.07

3 6 9 12 15

Flow Rate (l/min)

Thermal Resistance (C/W)

MicroCool Copper Tube

• 30% less thermal resistance

• 5X less pressure drop

Cost

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MicroCool Coldplate

Single piece price $255

Volume price: $100*

*1000+ units

Copper Tube Coldplate

Single piece price: $323

Volume price: ??

Thank You

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Robust FSW Construction MDT® Inside Balanced parallel cooling