Pump system supplied by frequency inverter e.g. for room heating medium circulation pump

摘要

The pump system has an electric motor and a gyro-pump driven by it. A clamp-on casing (8) attached to the motor housing (7) contains a frequency inverter, the base of the casing having an opening to allow heat from the power stage to escape. A heat conducting plate (6) arranged near the opening is thermally connected to a corresp. motor housing connecting surface (5). The clamp-on casing is made of metal and designed as a cooling body for convection cooling. The heat generating components of the power electronics are encapsulated in a metal intermediate housing (12) open to the casing opening, but otherwise closed, whereby at least two chambers at different temp. levels are formed in the clamp-on casing.