公开(公告)号：US20250052245A1

公开(公告)日：2025-02-13

申请号：US18718882

申请日：2022-12-02

Applicant: GRUNDFOS HOLDING A/S

Inventor： Steen MIKKELSEN ,  Troels JEPSEN ,  Keld Folsach RASMUSSEN ,  Kristian CHRISTOFFERSEN

IPC: F04D13/06 ,  F04D1/00 ,  F04D29/42 ,  F04D29/58 ,  H02K5/18 ,  H02K9/19 ,  H02K11/33

Abstract: An integrated electric motor drive. The motor drive having rotatable parts with a drive shaft and a rotor, wherein the drive shaft extends along a rotor axis and the rotor is mechanically coupled to the drive shaft; and static parts having a stator and power electronics for controlling an electric current through the stator. The integrated electric motor drive has a liquid cooling system with a closed liquid cooling circuit and a liquid coolant agitator. The closed liquid cooling circuit is filled with liquid coolant being in thermal contact with the stator and/or the power electronics. The liquid coolant agitator is arranged and configured to circulate the liquid coolant along the closed liquid cooling circuit. The liquid coolant agitator is mounted within the closed liquid cooling circuit to be rotatable about the rotor axis, and the liquid coolant agitator is magnetically coupled to the movable parts.

公开(公告)号：US20220200397A1

公开(公告)日：2022-06-23

申请号：US17551540

申请日：2021-12-15

Applicant: GRUNDFOS HOLDING A/S

Inventor： Steen MIKKELSEN ,  Keld Folsach RASMUSSEN

IPC: H02K5/22 ,  H02K1/14 ,  H02K15/03

Abstract: An electric pump drive motor three-phase stator assembly (1) includes three sets of stator segments (Si,j), configured in a ring about a stator axis (R). Each set includes n≥2 stator segments arranged in an n-fold rotational symmetry about the stator axis. Each stator segment includes a coil (3) having a first coil wire end and a second coil wire end. A plurality of 3n−3 connection wires (Wi,k) connect coils of a respective set of stator segments in series. A first and a second interposed stator segment are arranged in circumferential direction between the two connected coils of the respective set of stator segments. 3n−5 of the connection wires span across the first interposed stator segment at a distance (r1) to the stator axis and across the second interposed stator segment at a second distance (r2) to the stator axis (R). The second distance is larger than the first distance.