IGBT Heat Sink Modules for Central PV Inverters

Requirement

The customer’s central inverters sit in PV plant halls with power modules side by side along a duct. Maintenance requires pulling a single module without touching the machine. Their previous module had a thin base that spread heat poorly, so centre devices ran hot, and the rail-guided modular mounting made contact easy to misalign.

Our approach

We thickened the base so heat spreads laterally before reaching the fins, oriented fins along the duct with pitch varied between inlet and return, and machined a locating step on the module bottom to match the rail. Weight plus a retainer hold contact, and the mounting face is milled flat so a swapped module recovers contact without adjustment.

Delivery and inspection

First batch of 24 with flatness and step-dimension records, plus a swap procedure per module.

Project summary

Centre device temperature dropped and modules restore contact on reinsertion without re-adjustment. The construction is now standard for the customer’s hall-type inverters.