Appendix B Thermal Validation

Note Machining a heatsink base reduces the contact area between the heatsink and the electrical component. You can partially compensate for this effect by filling the machined areas with thermal grease. The grease should not contact the thermocouple junction.

Figure B-3. Mounting a Thermocouple Under a Heatsink

Thermocouple junction bonded to component

ISOMETRIC VIEW

Through hole for thermocouple junction clearance (may require removal of fin material)

Also use for alignment guidance during heatsink installation

Machined groove for thermocouple wire routing

Machined groove for thermocouple wire routing

Thermal pad

Heatsink base

HEATSINK BOTTOM VIEW

74MVME6100 Installation and Use (V6100A/IH2)

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Image 83
Motorola MVME6100 manual Figure B-3. Mounting a Thermocouple Under a Heatsink