Motor base structure with low eddy current loss

Abstract

The utility model relates to a motor base structure with low eddy current loss, which comprises a cast iron base, a plurality of notches are uniformly distributed on an inner cylinder of the cast iron base, an aluminum magnetic isolation strip is mounted in each notch in a matched manner, and a single aluminum magnetic isolation strip is flat and completely attached to the notch; a driving end machine cover mounting lug, a lead wire lapping area, an iron core area, a fan area and a non-driving end machine cover mounting lug are sequentially arranged on the cast iron machine base in the axial direction, the aluminum magnetic isolation strip is mounted in the iron core area, and mounting ground feet are arranged at the bottom of the cast iron machine base. The motor base is compact and reasonable in structure and convenient to operate, the problem that the cast iron base generates a large amount of eddy current loss in a high-frequency alternating magnetic field can be effectively solved through the design that the magnetic strips are arranged in the cast iron base, meanwhile, the heat dissipation problem of the base can be met, and the working reliability of the whole motor base is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor base technical field especially a low eddy current loss's motor base structure. BACKGROUND

[0002] "AC motor" is used for realizing mechanical energy and AC power conversion machinery. Due to the huge development of AC power system, AC motor has become the most commonly used motor, and its structure is simple, easy to manufacture, relatively firm, and easy to make into high-speed, high-voltage, large-current and large-capacity motor.

[0003] Cast iron base is mostly used in industrial AC motor, and such base will produce eddy current loss in alternating magnetic field. In today's environmental protection problem, low-carbon life has become the main theme of the times. High-efficiency motor is the demand of the times, and eddy current loss has a great influence on motor efficiency. Eddy current loss has a negative impact on the operation of motor, on the one hand, it wastes energy and increases operating cost, on the other hand, the heat generated by eddy current increases the temperature of motor, which affects the service life of motor, and even burns the motor. At present, small motors in the prior art mostly use integral cast aluminum base to reduce eddy current loss, while large motors are generally not treated. SUMMARY

[0004] In view of the above-mentioned shortcomings in the prior art, the present application provides a low eddy current loss motor base structure with reasonable structure, thereby effectively solving the problem of large eddy current loss of cast iron base in high-frequency alternating magnetic field, and also meeting the problem of heat dissipation of the base, so that the working reliability of the whole motor base is greatly improved.

[0005] The technical scheme adopted by the utility model is as follows:

[0006] A low eddy current loss motor base structure, comprising a cast iron base, a plurality of slots are uniformly distributed on the inner cylinder of the cast iron base, an aluminum magnetic shielding strip is fitted and installed in each slot, each aluminum magnetic shielding strip is flat, and each aluminum magnetic shielding strip is completely attached to the slot; the cast iron base is sequentially provided with a driving end cover mounting bracket, a lead-in wire lap joint area, a core area, a fan area and a non-driving end cover mounting bracket along the axial direction, the aluminum magnetic shielding strip is installed in the core area, and the bottom of the cast iron base is provided with a mounting foot.

[0007] As a further improvement of the above technical scheme:

[0008] The cast iron base is of an integrated structure.

[0009] The cast iron base is made of high-strength gray cast iron.

[0010] The number of aluminum magnetic shielding strips is equal to the number of poles of the motor.

[0011] The aluminum magnetic isolation strip is in a long strip structure.

[0012] The aluminum magnetic isolation strip is in a long strip structure.

[0013] The aluminum magnetic isolation strip is in a long strip structure.

[0014] The utility model discloses the beneficial effect is as follows:

[0015] The utility model discloses compact structure, reasonable, convenient operation, through the design of the installation magnetic strip in cast iron base, can effectively solved the cast iron base in the high frequency alternating magnetic field produces a large number of eddy current loss's problem, can also satisfy the base heat dissipation problem simultaneously, makes the whole motor base's work reliability greatly improves. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the structure schematic drawing of the utility model.

[0017] Figure 2 It is the structure schematic drawing of another angle of the utility model.

[0018] Figure 3 It is the explosion drawing of the utility model.

[0019] Figure 4 It is the sectional view of the utility model.

[0020] Among them: 1, cast iron base;2, aluminum magnetic isolation strip;

[0021] 101, drive end machine cover mounting tab;102, lead wire lap joint area;103, iron core area;104, fan area;105, non-drive end machine cover mounting tab;106, slot. DETAILED DESCRIPTION

[0022] The specific implementation of the utility model will be described below in combination with the drawings.

[0023] As Figures 1-4 The low eddy current loss motor base structure of the embodiment includes a cast iron base 1, and the inner cylinder of the cast iron base 1 is uniformly provided with a plurality of slots 106. An aluminum magnetic isolation strip 2 is mounted in each slot 106. Each aluminum magnetic isolation strip 2 is flat, and each aluminum magnetic isolation strip 2 is completely attached to the slot 106. The cast iron base 1 is sequentially provided with a drive end machine cover mounting tab 101, a lead wire lap joint area 102, an iron core area 103, a fan area 104, and a non-drive end machine cover mounting tab 105 along the axial direction. The aluminum magnetic isolation strip 2 is installed in the iron core area 103. The bottom of the cast iron base 1 is provided with a mounting foot. The overall cast iron base 1 has good stability.

[0024] The cast iron base 1 is of an integrated structure, which is convenient to manufacture and low in cost.

[0025] The cast iron base 1 is made of high-strength gray cast iron.

[0026] The number of the aluminum magnetic separation strips 2 is the same as the number of poles of the motor.

[0027] The aluminum magnetic separation strips 2 are in long strip structure.

[0028] The aluminum magnetic separation strips 2 are in arc structure.

[0029] The shape of the aluminum magnetic separation strips 2 can be adjusted according to the size of the actual motor, as shown in Figs. Figure 1 , Figure 2 and Figure 3 , the aluminum magnetic separation strips 2 of the embodiment are six, and the head of the aluminum magnetic separation strips 2 is provided with a step to adapt to installation.

[0030] The aluminum magnetic separation strips 2 are in interference fit with the notches 106.

[0031] The plurality of aluminum magnetic separation strips 2 arranged in the axial direction are inserted into the inner cylinder of the cast iron base 1, the aluminum magnetic separation strips 2 are in flat shape and are uniformly distributed on the inner cylinder, and the number of the aluminum magnetic separation strips 2 is the same as the number of poles of the motor.

[0032] The aluminum magnetic separation strips 2 mainly have two functions:

[0033] One is to separate the magnetic circuit of the magnetic field in the cast iron base 1 and prevent the generation of eddy current;

[0034] The second is that the heat transfer performance of aluminum is better than that of cast iron, which can better assist heat dissipation.

[0035] The cast iron base 1 is made of high-strength gray cast iron, which is easy to manufacture and has low cost.

[0036] The cast iron base 1 is made of high-strength gray cast iron, which is easy to manufacture and has low cost.

[0037] The cast iron base 1 is made of high-strength gray cast iron, which is easy to manufacture and has low cost.

[0038] The cast iron base 1 is made of high-strength gray cast iron, which is easy to manufacture and has low cost.

[0039] In the actual production and manufacturing process:

[0040] First, the cast iron base 1 is cast directly through a casting process, and then the aluminum magnetic separation strip 2 is matched and inserted at the slot 106 of the inner core area 103 of the cast iron base 1, the number of the aluminum magnetic separation strip 2 is ensured to be the same as the pole number of the motor, the overall installation is convenient and fast, and the working efficiency is high.

[0041] The above description is an explanation of the utility model, not a limitation of the utility model, the range defined by the utility model is seen from the claims, and any form of modification can be made within the protection range of the utility model.

Claims

1. A motor frame structure with low eddy current loss, characterized in that: The machine includes a cast iron base (1), on which a plurality of slots (106) are evenly distributed on the inner cylinder. An aluminum magnetic strip (2) is installed in each slot (106). The individual aluminum magnetic strip (2) is flat and fits completely with the slot (106). The cast iron base (1) is provided with a drive end cover mounting bracket (101), a lead wire connection area (102), a core area (103), a fan area (104), and a non-drive end cover mounting bracket (105) in sequence along the axial direction. The aluminum magnetic strip (2) is installed in the core area (103). The bottom of the cast iron base (1) is provided with mounting feet.

2. The motor frame structure with low eddy current loss as described in claim 1, characterized in that: The cast iron base (1) is an integral structure.

3. The motor frame structure with low eddy current loss as described in claim 1, characterized in that: The cast iron base (1) is made of high-strength gray cast iron.

4. The motor frame structure with low eddy current loss as described in claim 1, characterized in that: The number of aluminum magnetic strips (2) is related to the number of poles of the motor.

5. The motor frame structure with low eddy current loss as described in claim 1, characterized in that: The aluminum magnetic shielding strip (2) has a long strip structure.

6. The motor frame structure with low eddy current loss as described in claim 1, characterized in that: The aluminum magnetic strip (2) has an arc-shaped structure.

7. The motor frame structure with low eddy current loss as described in claim 1, characterized in that: The aluminum magnetic strip (2) and the slot (106) are fitted with an interference fit.

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