Pump arrangement having temperature control components

A pump arrangement for conveying a lubricating fluid to a component of a motor vehicle, comprising:

• a housing;
• a gear pump rotatably supported in the housing and including a first pump member and a second pump member, wherein a—pumping effect of the lubricating fluid is produced in response to relative rotation between the first and second pump members;
• an electric motor adapted to rotatably drive the first pump member, the electric motor including a stator and a rotor, the stator being fixed to the housing and arranged concentrically with respect to the first pump member, the rotor being fixed to the first pump member and configured to define an annular gap with the stator, wherein the lubricating fluid is present in the annular gap between the stator and rotor, and wherein the rotor has a lower thermal conductivity than the first pump member;
• wherein the stator includes a stator core having a plurality of radially aligned stator poles, windings surrounding the stator poles, and an electrically insulating material provided between adjacent stator poles, and wherein the stator includes a cylindrical inner surface formed alternately by terminal ends of the stator poles and the electrically insulating material;
• wherein the rotor is a ring element having a plurality of magnets and surrounds an outer circumference of the first pump member;
• wherein the ring element further includes a first heat insulating layer disposed radially between the magnets and the annular gap to define the annular gap between the inner surface of the stator and an outer surface of the first heat insulating layer for reflecting heat arising from the stator to hold the heat in the annular gap to heat the lubricating fluid in the annular gap to provide improved cold starting to the pump arrangement.