The new heatsink includes geometric water channels that are designed to ensure low values of the thermal resistance, even at moderate coolant flows, while retaining a robust structure compatible with high clamping force needed by large area power semiconductors. The geometric design used for water channels also ensures a highly uniform cooling over the whole surface area. Usual heatsink to input water thermal resistance (for flow rate of 10 L/min), is 4.3 K/kW (two coolers + 1 semiconductor) and 5.6 K/kW (three coolers + 2 semiconductors).
“The high quality surface finish, with a typical flatness of 20micrometers, makes these coolers ideally suited for use with our high performance Press-pack IGBTs (T1800EB45A & T2400EB45E), but not exclusively,” stated Frank Wakeman, Westcode’s marketing and technical support manager. “Additionally, they are designed to be used with all large area power devices such as Thyristors and Rectifier Diodes with contact electrodes from 90mm to 125mm diameter and clamping pressure up to 13 x106 Pa. Typical applications for the coolers would be in Megawatt power level drives and high power rectifiers, such as in heavy industrial applications, or for electric trains’ trackside substations, as well as all applications in the electricity generation and distribution. The high efficiency cooling provided with these coolers, enables the customers to achieve high power density in their systems with much reduced footprint.”
The new cooler is available in two versions: XW180GC34A without integral connecting bus bar and the XW180GC34B with integral connecting bus bar. The limit dimensions of cooler are 147mm x 142mm (262mm for the version with bus bar) x 34mm thick, water connection is 3/8 BSPP x 34mm Deep (minimum thread depth 14mm).
