High power density motor with water cooling structure

Abstract

The invention discloses a high-power density motor with a water cooling structure and belongs to the field of high-power density motors. The high-power density motor with the water cooling structure is characterized in that a stator winding is annularly sheathed on a stator iron core by adopting a back winding way, an inner side winding is placed in an internal slot in the stator iron core, an outer side winding is placed in an external slot in the stator iron core, and an end winding is placed on an end supporting frame; the axial lengths of an internal-layer machine case and an external-layer machine case are the same, seamless welding is adopted, dimension of the outer surface of the internal-layer machine case and the dimension of the inner surface of the external-layer machine case are in tight fit, and supporting ribs are arranged at intervals for forming a continuous water channel; projected gear teeth in the inner circle of the internal-layer machine case and an external slot in the stator iron core are assembled in tight fit; copper loss and iron loss during operation of a motor can be transmitted to a water cooling machine case. The high-power density motor with the water cooling structure has the advantages that the structure is simple, the effect is obvious, the defects of the existing airtight oil cooling system that the sealing degree is high and auxiliary equipment is complex are overcome, and the problem that the cooling effect of an open-type air cooling system is poor is solved; a cooling system of the high-density motor is effectively improved, the working temperature rise of the motor is reduced, and the system stability of the motor is improved.

Description

Technical field

[0001] The invention relates to a high-power density motor and its cooling system, and belongs to the electrical field. Background technique

[0002] High power density motors generally have the characteristics of high working speed, small size, high material utilization, fast dynamic response and high efficiency of the transmission system, and they have the advantages of high efficiency and high power factor. Therefore, in the fields of distributed power generation systems, flywheel energy storage systems, aerospace, high-speed grinders, hybrid vehicles, ships, textiles, centrifugal compressors for air conditioners or refrigerators, as well as in military vehicles, tanks, aircraft, land and sea defenses , Mobile power supply and other military fields have advantages and good application prospects.

[0003] Compared with conventional motors, the thermal load of high-power density motors has increased significantly, and the loss per unit volume of the motor and the ...

Examples

Embodiment Construction

[0042] The embodiments of the present invention will be further described with reference to the accompanying drawings:

[0043] Such as Figure 1-Figure 9 As shown, a high-power-density motor with a water-cooled structure includes: stator winding 1, stator core 2, casing, rotor 4, rotating shaft 5, end cover 6 and bearings;

[0044] An inner slot 2-1 and an outer slot 2-2 are evenly distributed along the circumference on the inner and outer circles of the stator core 2;

[0045] The number of inner grooves 2-1 and outer grooves 2-2 on the stator core 2 are equal, and the corresponding inner grooves 2-1 and outer grooves 2-2 are at the same radius;

[0046] The cross-sectional area of ​​the outer tank 2-2 is greater than 30%-50% of the cross-sectional area of ​​the inner tank 2-1;

[0047] The stator winding 1 is looped on the stator core 2 in a back-winding manner. The inner winding 1-1 is placed in the inner slot 2-1 on the stator core 2, and the outer winding 1-2 is placed in the out...

Technical field

[0001] The invention relates to a high-power density motor and its cooling system, and belongs to the electrical field. Background technique

[0002] High power density motors generally have the characteristics of high working speed, small size, high material utilization, fast dynamic response and high efficiency of the transmission system, and they have the advantages of high efficiency and high power factor. Therefore, in the fields of distributed power generation systems, flywheel energy storage systems, aerospace, high-speed grinders, hybrid vehicles, ships, textiles, centrifugal compressors for air conditioners or refrigerators, as well as in military vehicles, tanks, aircraft, land and sea defenses , Mobile power supply and other military fields have advantages and good application prospects.

[0003] Compared with conventional motors, the thermal load of high-power density motors has increased significantly, and the loss per unit volume of the motor and the ...

Examples

Embodiment Construction

[0042] The embodiments of the present invention will be further described with reference to the accompanying drawings:

[0043] Such as Figure 1-Figure 9 As shown, a high-power-density motor with a water-cooled structure includes: stator winding 1, stator core 2, casing, rotor 4, rotating shaft 5, end cover 6 and bearings;

[0044] An inner slot 2-1 and an outer slot 2-2 are evenly distributed along the circumference on the inner and outer circles of the stator core 2;

[0045] The number of inner grooves 2-1 and outer grooves 2-2 on the stator core 2 are equal, and the corresponding inner grooves 2-1 and outer grooves 2-2 are at the same radius;

[0046] The cross-sectional area of ​​the outer tank 2-2 is greater than 30%-50% of the cross-sectional area of ​​the inner tank 2-1;

[0047] The stator winding 1 is looped on the stator core 2 in a back-winding manner. The inner winding 1-1 is placed in the inner slot 2-1 on the stator core 2, and the outer winding 1-2 is placed in the out...

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