电机的定子结构以及电机
By designing interconnected oil channels in the yoke and teeth of the motor stator structure, uniform cooling of the stator core is achieved, solving the problem of uneven cooling in the prior art and improving the heat dissipation efficiency and working efficiency of the motor.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NAKAZAKI MOTOR (SUZHOU) CO LTD
- Filing Date
- 2025-07-16
- Publication Date
- 2026-07-17
AI Technical Summary
The existing stator structure of motors cannot simultaneously cool the yoke and teeth of the stator core, resulting in uneven cooling, poor heat dissipation, and reduced motor efficiency.
Design a motor stator structure that uses connected oil channels for the yoke and the teeth, with the cooling oil entering and exiting from the same end to achieve direct cooling of the stator core yoke and teeth. The connected oil channels simplify the flow path of the cooling oil.
It improves the heat dissipation capacity and cooling uniformity of the stator core, enhances the heat dissipation efficiency and power density of the motor, and improves the working efficiency of the motor.
Smart Images
Figure CN224520781U_ABST
Abstract
Claims
1. A stator structure for an electric motor, characterized in that, include: A stator core (10) is annular and has multiple cooling oil channels (11) arranged sequentially and spaced apart along the circumference of the stator core (10). Each cooling oil channel (11) includes a yoke oil channel (111) and a tooth oil channel (112). Both the yoke oil channel (111) and the tooth oil channel (112) extend axially along the stator core (10). The tooth oil passage (112) is arranged radially along the stator core (10), and the yoke oil passage (111) and the tooth oil passage (112) are connected. The yoke oil passage (111) has an oil inlet (1111), and the tooth oil passage (112) has an oil outlet (1121). Along the axial direction of the stator core (10), the oil inlet (1111) and the oil outlet (1121) of the same cooling oil passage (11) are located at the same end of the stator core (10).
2. The stator structure of an electric motor according to claim 1, characterized in that, The cooling oil passage (11) further includes a connecting oil passage (113), which connects the yoke oil passage (111) and the tooth oil passage (112) so that the yoke oil passage (111) and the tooth oil passage (112) are connected in series.
3. The stator structure of an electric machine according to claim 2, characterized in that The connecting oil passage (113) extends radially along the stator core (10).
4. The stator structure of the electric machine according to claim 1, characterized by The plurality of cooling oil channels (11) include: a first type of cooling oil channel (21) and a second type of cooling oil channel (22) along the axial direction of the stator core (10), the stator core (10) having a first end (12) and a second end (13), the oil inlet (1111) and the oil outlet (1121) of the first type of cooling oil channel (21) being located at the first end (12) of the stator core (10), and the oil inlet (1111) and the oil outlet (1121) of the second type of cooling oil channel (22) being located at the second end (13) of the stator core (10).
5. The stator structure of the motor according to claim 4, characterized in that, At least one of the two adjacent cooling oil passages (11) is the first type of cooling oil passage (21), and the other is the second type of cooling oil passage (22).
6. The stator structure of the electric machine according to claim 4, characterized in that, The stator core (10) includes: a core body (14), a first core lamination (15), a second core lamination (16), a third core lamination (17), and a fourth core lamination (18). Along the axial direction of the stator core (10), the first core lamination (15) and the second core lamination (16) are located on one side of the core body (14), the second core lamination (16) is located between the first core lamination (15) and the core body (14), the third core lamination (17) and the fourth core lamination (18) are located on the other side of the core body (14), and the fourth core lamination (18) is located between the third core lamination (17) and the core body (14). The first core plate (15) has a first oil hole (151), the second core plate (16) has a second oil hole (161), and the core body (14) has a third oil hole (141). The first oil hole (151), the second oil hole (161), and the third oil hole (141) are arranged one-to-one to form the yoke oil passage (111) of the first type of cooling oil passage (21). The first core plate (15) has a fourth oil hole (152), the second core plate (16) has a fifth oil hole (162), and the core body (14) has a sixth oil hole (142). The fourth oil hole (152), the fifth oil hole (162), and the sixth oil hole (142) are arranged one-to-one to form the tooth oil passage (112) of the first type of cooling oil passage (21). The third core plate (17) has a seventh oil hole (171), the fourth core plate (18) has an eighth oil hole (181), and the core body (14) has a ninth oil hole (143). The seventh oil hole (171), the eighth oil hole (181), and the ninth oil hole (143) are arranged one-to-one to form the yoke oil passage (111) of the second type of cooling oil passage (22). The third core plate (17) has a tenth oil hole (172), the fourth core plate (18) has an eleventh oil hole (182), and the core body (14) has a twelfth oil hole (144). The tenth oil hole (172), the eleventh oil hole (182), and the twelfth oil hole (144) are arranged one-to-one to form the tooth oil passage (112) of the second type of cooling oil passage (22).
7. A stator structure of an electric machine according to claim 6, characterized in that The fourth core lamination (18) has a first communicating oil hole (183) that extends radially along the fourth core lamination (18) and is configured as a portion of the corresponding cooling oil channel (11). The first communicating oil hole (183) communicates with the third oil hole (141) and the sixth oil hole (142); and / or The second core plate (16) has a second connecting oil hole (163) which extends radially along the second core plate (16) and is configured as a portion of the corresponding cooling oil channel (11). The second connecting oil hole (163) connects the ninth oil hole (143) and the twelfth oil hole (144).
8. The stator structure of the electric machine according to claim 6, characterized in that, The structure of the first core lamination (15) is the same as that of the third core lamination (17); and / or The structure of the second core piece (16) is the same as that of the fourth core piece (18).
9. The stator structure of an electric machine according to any one of claims 1-3, characterized in that, At least a portion of the tooth oil passage (112) is located at the corresponding stator tooth (31) of the stator core (10).
10. An electric machine characterized by The stator structure (100) includes the motor (1) according to any one of claims 1-9.
11. The electric machine of claim 10, wherein, Also includes: A housing (200) is provided inside the stator structure (100). Along the radial direction of the stator structure (100), the housing (200) has a housing sidewall (210) opposite to the stator structure (100). The housing sidewall (210) forms a plurality of oil inlets (220). Along the axial direction of the stator structure (100), a portion of the plurality of oil inlets (220) is located on one side of the stator structure (100), and another portion of the plurality of oil inlets (220) is located on the other side of the stator structure (100).