Light liquid-cooled power electronic unit

A lightweight liquid-cooled power electronics unit comprises: a number of electromagnetic components (10); a cooling circuit (20) having a number of intermediate cooling regions (23), each in intimate contact with one of the electromagnetic components (10), allowing heat transfer by conduction; and a first wall (31) housing at least a first flat manifold (21) constituting part of the cooling circuit (20); wherein each intermediate cooling region (23) of the cooling circuit (20) is defined within a spool (13) inserted between the conductive coil (12) and the magnetic core (11) of each electromagnetic component (10); the first flat manifold (21) comprises a first connection opening (41) oriented towards the electromagnetic component (10), each intermediate cooling region (23) of the cooling circuit (20) being tightly connected to the first flat manifold (21) by a fitting perpendicular to the main surface of the first wall (31) passing through the first connection opening (41). 轻型液冷式功率电子单元，包括：若干电磁部件(10)；具有若干中间冷却