Stator winding

Abstract

The invention discloses a novel 27-slot 6-pole three-double-layer hybrid winding, each phase is provided with two groups of coils, each group is provided with # imgabs0 # coils, and each phase winding is formed by three layers and double layers; the problem that the 27-slot 6-pole multiple relation double-voltage design is difficult can be effectively solved; and the cost of newly opening a stator and rotor punching die and a winding die can be saved, and the production cost is saved.

Description

Technical Field

[0001] The invention relates to the field of motor manufacturing, and in particular to a novel winding. Background Art

[0002] The 27-slot stator is mostly used for motors with a relatively small 6-pole frame (H63-80). Due to the small outer diameter of the stator of the small frame size, the number of stator slots cannot be designed too much. When designing motors with multiple dual voltages (such as 190 / 380V, 230 / 460V, etc. used in a few countries and regions), since the voltage needs to be changed by changing the number of parallel branches, each set of windings must be symmetrical or the number of coils in each set must be the same. Whether single-layer, double-layer, or single-double-layer windings are used, 27-slot 6-pole cannot be achieved. Usually, in this case, it is necessary to change the number of stator and rotor slots and re-open the stator and rotor dies, but the order volume of small 6-pole motors is relatively small, and the cost of opening the die is too high. Summary of the invention

[0003] The object of the present invention is to provide a stator winding, which is intended to satisfy a small motor with 27 stator slots and 6 poles in a power supply system with a multiple relationship and dual voltage.

[0004] To achieve the above-mentioned invention object, the present invention adopts the following technical scheme: a motor stator winding, characterized in that: the stator is a 27-slot 6-pole stator winding including U, V, W three-phase windings, the voltage is a multiple relationship dual voltage power supply, the winding is a double-layer and triple-layer mixed embedded in the stator slot and the number of winding turns is an even number, the U, V, W three-phase windings are symmetrically distributed, each phase has 2 groups of coils, each group has 5 coils, and each group has 1 coil whose number of turns is equal to the number of turns of other windings

[0005] In the above scheme, the fifth coil in the middle is divided into two parts and disconnected in the middle. The 9 coils in each phase are divided into two groups. When A=2, each group has 4 coils and the three-phase resistance is balanced. The slots of the turns winding all have three layers of winding, but the total number of turns is the same as the number of other slots, except that there is an additional middle layer of insulation. The present invention can achieve a 27-slot 6-pole multiple relationship dual voltage design by changing the winding and embedding method of the winding, which can save the cost of opening new stator and rotor dies and winding dies, thereby saving production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 This is the expanded diagram of 27-slot, 6-pole, three-double-layer winding;

[0007] Figure 2 This is the distribution diagram of the U-phase winding coil and the slots it is embedded in. DETAILED DESCRIPTION

[0008] For an ordinary 27-slot 6-pole double-layer winding, there should be 9 coils. When the number of parallel branches A=2, three-phase resistance imbalance will occur. This application proposes a solution based on this problem. The specific solution is a motor stator winding, characterized in that: the stator is a 27-slot 6-pole stator winding including U, V, and W three-phase windings, the voltage is a multiple relationship of dual voltage power supply, the winding is a double-layer and triple-layer mixed embedded in the stator slot and the number of winding turns is an even number, the U, V, and W three-phase windings are symmetrically distributed, each phase has 2 groups of coils, each group has 5 coils, and each group has 1 coil whose number of turns is equal to the number of turns of other windings.

[0010] In other words, the above solution is to divide the fifth coil in the middle into two parts, and disconnect it in the middle. The 9 coils in each phase are divided into two groups. When A=2, each group has 4 coils, and the three-phase resistance is balanced. The slots of the turns winding all have three layers of winding, but the total number of turns is the same as the other slot numbers, except that there is an additional middle layer of insulation. For the ordinary 27-slot 6-pole double-layer winding of the small motor base, 9 coils should be set up to achieve it. The present invention can achieve a 27-slot 6-pole multiple relationship dual voltage design by changing the winding and embedding method of the winding, which can save the cost and time of opening new stator and rotor dies and winding dies, and save production costs.

[0011] The voltage is a dual voltage power supply with a multiple relationship, that is, the power supply voltage is a multiple relationship of 190 / 380V or 230 / 460V. The power supply voltage is the power supply voltage of a specific area, which is different from the common electric power supply of 220 / 380V in my country.

[0012] The rule sequence is as follows:

[0013] 2 coils for U phase━1 coil for V phase━2 coils for W phase━1 coil for U line━2 coils for V phase…, two full-slot coils of the same phase are embedded in the same two slots and the two slots are three-layer windings, and the other slots are double-layer windings.

[0014] See also Figure 1 , the new 27-slot 6-pole three-double-layer winding expansion diagram is a three-phase winding. They are: U phase winding 1, V phase winding 2, W phase winding 3. The three-phase windings are evenly distributed, each phase winding has 2 groups, each group has 4 Coils, each of which is composed of a three-layer winding 5 and four double-layer windings 4. The winding and inserting sequence is shown in the following table (taking a 96-turn coil as an example):

[0016] The above table is a summary table of winding and embedding.

[0017] The winding sequence is as follows: According to Table 1, there are 2 types of windings, 3 groups of each type, and each group has Full turns coil:

[0018] The first winding: first wind two full-turn coils, leaving a bridge wire; then wind one full-turn coil, leaving a bridge wire; finally wind two more coils, the first of which is a full-turn coil and the second is Full turns coil;

[0019] The second winding: first winding Wind a full-turn coil, leaving a bridge wire; wind another full-turn coil, leaving a bridge wire; wind two full-turn coils in succession, leaving a bridge wire again; finally wind another full-turn coil.

[0020] Insertion sequence: According to Table 1, the insertion sequence is 2 coils for U line - 1 coil for V phase - 2 coils for W phase - 1 coil for U line - 2 coils for V phase..., two coils for the same phase The full-slot coil is embedded in the same two slots, and these two slots become three-layer windings. The other slots are double-layer windings. For details on the distribution diagram of U-phase embedded in each slot, see Figure 2 , see the internal expansion diagram of the three-phase winding Figure 1 .

[0021] The above 12 outgoing lines and each group has the same number of coils can realize a 2△ / △ connection multiple relationship dual voltage design. It can also be connected to a 9-outgoing line 2Y / Y connection multiple relationship dual voltage design with an internal star point (U4, V4, W4 short-circuited together).

[0022] Figure 1 The number 1 is the U-phase winding, 2 is the V-phase winding, 3 is the W-phase winding, 4 is the double-layer winding, and 5 is the triple-layer winding; Figure 1 , 2 The slot position 11 is the U-phase 5th slot in which three layers of U-phase windings are embedded. The three layers of windings are 96 turns, 48 ​​turns, and 48 turns respectively.

Claims

1. A motor stator winding, characterized in that: The stator is a 27-slot 6-pole stator winding including U, V, W three-phase windings, the voltage is a multiple relationship dual voltage power supply, the winding is a double-layer and triple-layer mixed embedded in the stator slot and the number of winding turns is an even number, U, V, W three-phase windings are symmetrically distributed, each phase has 2 groups of coils, each group has 5 coils, of which each group has 1 coil with the number of turns equal to the number of turns of other windings 2. The motor stator winding according to claim 1, characterized in that: The power supply voltage is a multiple of 190 / 380V or 230 / 460V.

3. The motor stator winding according to claim 1 or 2, characterized in that: A 27-slot, 6-pole double-layer winding should have 9 coils. The fifth coil in the middle is divided into two parts and disconnected in the middle. The 9 coils in each phase are divided into two groups. When A=2, each group has 4 coils.

4. The motor stator winding according to claim 1, characterized in that: There are two types of windings, each with 3 groups. The winding sequence of the two types of windings is as follows: The first winding: first wind two full-turn coils, leaving a bridge wire; then wind one full-turn coil, leaving a bridge wire; finally wind two more coils, the first of which is a full-turn coil and the second is Full turns coil; The second winding: first winding Wind a full-turn coil, leaving a bridge wire; wind another full-turn coil, leaving a bridge wire; wind two full-turn coils in succession, leaving a bridge wire again; finally wind another full-turn coil.

5. The motor stator winding according to claim 1 or 4, characterized in that: The rule sequence is as follows: U phase 2 coils - V phase 1 coil - W phase 2 coils - U line 1 coil - V phase 2 Coils..., two full-slot coils of the same phase are embedded in the same two slots and the two slots are three-layer windings, The other slots are all double-layer windings.

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