Circulation pump assembly

A method for manufacturing a circulation pump assembly comprising a wet-running, electrical drive motor with a stator, a plurality of motor electronics, a pump casing, a cover, a potting mass and a motor housing connected to the pump casing, the method comprising the steps of:

• providing the motor housing such that the motor housing is closed at a first axial end by an air gap sleeve and such that the motor housing comprises an opening at an opposite, second axial end;
• inserting the stator and the motor electronics through the opening into the motor housing;
• pressure-free pouring of the potting mass through the opening into the motor housing;
• closing the opening by the cover after pressure-free pouring of the potting mass through the opening in the motor housing, whereby the motor housing forms a combined stator and electronics housing accommodating the stator of the drive motor as well accommodating the motor electronics, wherein the circulation pump assembly further comprises at least one electrical connection cable which extends outwards out of the motor housing, wherein one end portion of the at least one electrical connection cable is embedded in the potting mass such that the potting mass is engaged with sheathing of the at least one electrical connection cable to form a strain relief device, and the at least one electrical connection cable is led out of the potting mass in a direction towards the second axial end and extends outwards out of the motor housing transversely to the direction towards the second axial end, wherein a portion of the at least one electrical connection cable extends from a position adjacent to at least one component of the motor electronics to a position located in an interior of the motor housing without any intervening electrical connections, the portion of the at least one electrical connection cable being in direct contact with the potting mass and surrounded by the potting mass;
• the potting mass being a one-piece potting mass, the one-piece potting mass surrounding the stator, the portion of the at least one electrical connection cable and the motor electronics, the cable being embedded into the potting mass such that the cable forms at least a portion of the strain relief device.

A circulation pump assembly comprising:

• a wet-running, electrical drive motor with a stator;
• motor electronics;
• a pump casing;
• a cover;
• a potting mass;
• a motor housing connected to the pump casing, wherein the motor housing is a combined stator and electronics housing accommodating the stator of the drive motor as well as accommodating the motor electronics, the motor housing having a first axial end, which faces the pump casing, that is closed by an air gap sleeve of the drive motor and the motor housing having a second axial end which is away from the pump casing and comprises an opening closed by the cover and the motor housing having an interior in a region adjacent the first axial end that is filled with the potting mass which surrounds the stator and the motor electronics, the motor housing having a motor housing interior space, the motor housing interior space being free of the potting mass, wherein at least a portion of the motor housing defines at least a portion of a cable receiving opening;
• and
• an electrical connection cable extending from a position in the potting mass through the motor housing space and the cable receiving opening to a position located outside of the motor housing, wherein a first extent of the electrical connection cable is in contact with the potting mass and a second extent of the electrical connection cable is located in the motor housing interior space at a spaced location from the potting mass, the first extent of the electrical connection cable extending continuously and without intervening separable electrical connections from a first position located adjacent to at least one of the motor electronics to a second position in the potting mass located at a spaced location from the first position;
• wherein the potting mass is formed in one-piece to define a one-piece potting mass structure.