CN106411084A - High power mixed excitation motor with novel water-cooling structure - Google Patents

Abstract

The invention relates to the technical field of motor cooling, in particular to a high-power hybrid excitation motor with a novel water-cooling structure. It includes coaxially arranged stator core, rotor core and rotating shaft; two sets of ring-shaped field windings arranged at intervals along the axial direction of the stator core are installed on the stator core, and multiple sets of armatures are arranged on the inner surface of the circumference of the stator core. Winding; the outer surface of the rotor core is provided with multiple sets of magnetic pole structures, and the stator core is pierced with a number of heat dissipation pipes with cold medium inside. Ring cooling structure between ring field windings. By arranging the radiating pipe between the armature winding and the ring-shaped excitation winding, the invention speeds up the rate of heat conduction, greatly improves the problem that the winding of a large-scale excitation motor is difficult to dissipate heat due to heat generation, and has great popularization value.

Description

A High Power Hybrid Excitation Motor with New Water Cooling Structure

technical field

The invention relates to the technical field of motor cooling, in particular to a high-power hybrid excitation motor with a novel water-cooling structure.

Background technique

Traditional motor cooling methods are mainly divided into air cooling and water cooling. The air cooling method usually arranges radial ventilation grooves in the stator core to form a radial air path, and the heat generated during the operation of the motor is taken away by cooling air to reduce the temperature of the motor; The water-cooling method usually installs a water-cooling base or axial water pipes on the outer circle of the stator core, and the heat in the motor is taken away by the circulating cold water or cold medium to reduce the temperature of the motor. Due to the particularity of the stator structure of the high-power hybrid excitation motor, in addition to the traditional stator core and armature windings, there are stator magnetic sleeves and two sets of ring-shaped excitation windings, which increase the stator loss and increase the difficulty of stator heat dissipation. The magnetic sleeve of the stator is a solid structure, if the radial ventilation groove is used for cooling, the radial air path cannot be formed. In addition, the ring-shaped excitation winding in the high-power hybrid excitation motor is an important component for adjusting the magnetic field. The heat generated by the excitation winding is relatively large. The existing technology generally installs a water-cooled frame or shaft outside the stator magnetic sleeve. To the water pipe, the heat generated by the excitation winding is conducted through the magnetic sleeve and the stator and then taken away through the axial water pipe. The conduction distance is long and the cooling effect is not good. Therefore, the traditional cooling structure cannot be applied to high-power hybrid excitation motors. If the design of the stator cooling structure is unreasonable, the heat of the stator cannot be exported in time, which will have an adverse effect on the long-term stable operation of the motor.

Contents of the invention

The purpose of the present invention is to solve the problem that the cooling structure in the existing high-power hybrid excitation motor mentioned in the background technology is too far away from the excitation winding and the cooling effect is not good, and to provide a high-power hybrid excitation motor with a new water-cooling structure .

The technical solution of the present invention is: a high-power hybrid excitation motor with a new water-cooling structure, including a coaxially arranged stator core, a rotor core and a rotating shaft; the outer surface of the stator core is covered with a magnetic sleeve, and the stator At least two sets of annular field windings arranged at intervals along the axial direction of the stator core are installed on the iron core. There are multiple sets of armature windings arranged along the axial direction of the parallel rotating shaft on the inner circumferential surface of the stator core. Multiple sets of armature windings are arranged along the axial direction of the stator core. arranged at intervals in the circumferential direction of the rotor core; multiple sets of magnetic pole structures are sheathed on the outer circumferential surface of the rotor core,

It is characterized in that: the stator core is pierced with a plurality of radiating pipes with cold medium inside, and the plurality of radiating pipes are arranged at intervals along the circumferential direction to form a center around the axis of the stator core around the armature winding and the ring excitation Ring cooling structure between windings.

Further, the heat dissipation pipe penetrates through the stator core in a direction parallel to the axis of the stator core.

Further, the circumferential outer surface of the heat dissipation pipe is connected with the stator core by interference fit.

Further, the stator core is composed of at least three coaxial iron rings that are sleeved on the outside of the rotor core. The iron rings are made of laminated silicon steel sheets. A plurality of iron rings are arranged at intervals. There is a group of annular excitation windings; said annular excitation windings are close to the outer surface of the stator core circumference.

Further, each group of magnetic pole structures includes two core poles and two permanent magnet poles; the two core poles are relatively arranged on the outer circumferential surface of the rotor core with the axis of the rotating shaft as the center, and the two permanent magnet poles are relatively arranged on the rotor with the axis of the rotating shaft as the center. On the circumferential outer surface of the iron core, the iron core poles and the permanent magnet poles are alternately arranged at intervals.

Further multiple sets of magnetic pole structures are arranged at intervals along the axial direction of the rotating shaft, and the core poles and permanent magnetic poles in adjacent two sets of magnetic pole structures are arranged alternately.

By arranging the heat dissipation pipe between the armature winding and the ring-shaped excitation winding, the invention shortens the distance between the heat dissipation pipe and the winding, improves the efficiency of heat conduction, speeds up the rate of heat conduction, and greatly improves the heat generation of the large excitation motor winding. The problem of not being easy to dissipate heat has great promotional value.

Description of drawings

Fig. 1: the schematic diagram of longitudinal section structure of the present invention;

Figure 2: a schematic diagram of a transverse cross-sectional structure of the present invention;

Among them: 1—magnetic sleeve; 2—annular excitation winding; 3—stator core; 4—radiating pipe; 5—armature winding; 6—core pole; 7—rotor core; 8—permanent magnet pole; 9—rotating shaft.

detailed description

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figures 1-2, it includes the stator core 3, the rotor core 7 and the rotating shaft 9, and the three are coaxially arranged, wherein the rotating shaft 9 is placed on the central axis of the rotor core 7, and the rotor core 7 is placed on the central axis of the stator core 3 . The stator core 3 in this embodiment is composed of three iron rings, each iron ring is laminated by silicon steel sheets, the three iron rings are coaxially arranged, and are arranged at intervals along the axial direction of the parallel rotating shaft 9. In this embodiment, there are Annular excitation winding 2, two sets of annular excitation windings 2 are arranged at intervals along the axial direction of the parallel rotating shaft 9, and a plurality of installation grooves along the axial direction of the parallel rotating shaft 9 are opened on the inner circumferential end surface of the stator core 3, and the installation grooves are embedded with There are armature windings 5, the armature windings 5 are wire windings arranged along the axial direction of the parallel rotating shaft 9, and multiple groups of armature windings 5 are distributed in a ring around the axis of the rotating shaft 9 along the circumferential direction of the iron ring, and generate a magnetic field after electrification , the armature winding 5 and the annular field winding 2 are not in contact with each other, the armature winding 5 is located on the inner circumferential surface of the stator core 3 , and the annular field winding 2 is close to the outer circumferential surface of the stator core 3 . The outer surface of the stator core 3 is covered with a magnetic sleeve 1 .

The rotor core 7 of this embodiment is fixed on the rotating shaft 9, and the outer circumferential surface of the rotor core 7 is equipped with core poles 6 and permanent magnet poles 8, and two core poles 6 and two permanent magnet poles 8 are combined to form a set of magnetic pole structures. There are multiple sets of magnetic pole structures arranged on the core 7, and the multiple sets of magnetic pole structures are arranged at intervals along the axial direction of the rotor core 7. The core poles 6 and the permanent magnetic poles 8 in the adjacent two sets of magnetic pole structures are arranged in a staggered manner. The two core poles 6 are arranged relative to the axis of the rotating shaft 9 with an interval of 180°, and the same two permanent magnet poles 8 are arranged opposite to the axis of the rotating shaft 9 with an interval of 180°.

The armature winding 5 and the annular field winding 2 of this embodiment will generate a large amount of heat during use. In order to conduct this part of heat, this embodiment is provided with a plurality of cooling pipes with cold medium inside the stator core 3. 4. The heat dissipation pipe 4 runs through the stator core 3 along the axial direction parallel to the stator core 3. The inlet and outlet ends of the heat dissipation pipe 4 are located outside the stator core 3. 3 is connected by interference fit to ensure sufficient contact between the heat dissipation pipe 4 and the stator core 3, and has good heat dissipation performance.

In this embodiment, a plurality of heat dissipation pipes 4 are installed on the stator core 3, and the plurality of heat dissipation pipes 4 are distributed at intervals in a ring along the circumferential direction of the stator core 3 with the axis of the stator core 2 as the center, and the heat dissipation pipes 4 are arranged on the armature winding 5 Between the ring field winding 2.

In actual use, by passing cold medium into the heat dissipation pipe 4, the cold medium flows through the heat dissipation pipe 4 to take away the heat generated by the armature winding 5 and the annular field winding 2, avoiding a large amount of heat deposited on the stator core 3 and causing its Rapid heating affects use.

The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above-mentioned embodiments, and that described in the above-mentioned embodiments and the description only illustrates the principles of the present invention, and the present invention also has various aspects without departing from the spirit and scope of the present invention. Variations and improvements all fall within the scope of the claimed invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (6)

1. a kind of high-power hybrid-excitation motor with water cooling structure, including coaxially arranged stator core (3), rotor ferrum The heart (7) and rotating shaft (9)；Described stator core (3) circumferential outer surface is arranged with magnetic conduction sleeve (1), and stator core (3) is upper to install There are at least two groups along the spaced apart circular excitation winding of stator core (3) axis direction (2), in the circumference of stator core (3) Multigroup armature winding (5) laid vertically is provided with surface, multigroup armature winding (5) is along the circumference side of stator core (3) To arranged for interval；It is arranged with multigroup field structure on the described circumferential outer surface of rotor core (7),

It is characterized in that：It is equipped with the radiating tube (4) that many inside are connected with cold medium, many dissipate in described stator core (3) The circumferentially spaced arrangement of heat pipe (4) forms and is looped around armature winding (5) and ring centered on the axis of stator core (3) Annular heat radiation structure between shape Exciting Windings for Transverse Differential Protection (2).

2. as claimed in claim 1 a kind of high-power hybrid-excitation motor with water cooling structure it is characterised in that：Described Radiating tube (4) along parallel stator core (3) axis direction insertion stator core (3).

3. as claimed in claim 1 or 2 a kind of high-power hybrid-excitation motor with water cooling structure it is characterised in that： Described radiating tube (4) circumferential outer surface is connected with stator core (3) interference fit.

4. as claimed in claim 1 a kind of high-power hybrid-excitation motor with water cooling structure it is characterised in that：Described Stator core (3) by least three ring sets, the coaxial iron hoop outside rotor core (7) forms, iron hoop is by silicon steel plate stacking Become, multiple iron hoop arranged for intervals, between two neighboring iron hoop, be provided with one group of circular excitation winding (2)；Described circular excitation Winding (2) is near stator core (3) circumferential outer surface.

5. as claimed in claim 1 a kind of high-power hybrid-excitation motor with water cooling structure it is characterised in that：Every group Field structure includes two pieces of poles (6) unshakable in one's determination and two pieces of permanent-magnet poles (8)；Two pieces of poles (6) unshakable in one's determination are relative centered on rotating shaft (9) axis Be arranged on the circumferential outer surface of rotor core (7), two pieces of permanent-magnet poles (8) centered on rotating shaft (9) axis positioned opposite in turning On the circumferential outer surface of son iron core (7), pole (6) unshakable in one's determination and the spaced staggered arrangement of permanent-magnet pole (8).

6. as claimed in claim 1 a kind of high-power hybrid-excitation motor with water cooling structure it is characterised in that：Multigroup Field structure is along rotating shaft (9) axial direction arranged for interval, the pole unshakable in one's determination (6) in two adjacent groups field structure and permanent-magnet pole (8) phase Mutually interlaced arrangement.