Double-slot multi-winding parallel stator structure

Abstract

The utility model relates to a double-slot multi-winding parallel stator structure, which belongs to the technical field of motors and comprises a stator and a coil, a plurality of outer teeth are uniformly distributed on the outer side of the stator, a stator slot is arranged between two adjacent outer teeth, the coil is arranged on the two adjacent outer teeth in a surrounding manner, the coil and the two outer teeth form a winding, and the winding is wound on the stator slot. Each winding is provided with a head leading-out wire and a tail leading-out wire, the head leading-out wires of the windings of the same type are mutually connected, the tail leading-out wires of the windings of the same type are mutually connected, and the head leading-out wires and the tail leading-out wires extend towards one side of the outer teeth. The double-slot multi-winding parallel stator structure can improve the rotating speed and the overload capacity of a motor while improving the slot fullness rate.

Description

TECHNICAL FIELD

[0001] The utility model belongs to motor technical field, especially a kind of double-slot multi-winding parallel stator structure. BACKGROUND

[0002] The winding of current electric vehicle wheel hub motor is multi-line parallel structure, which originated around 2000. At that time, automatic winding equipment was extremely rare, and motor manufacturers could only use traditional manual wire embedding process to manufacture motors. Moreover, multi-line parallel winding is simple to learn and easy to operate, and has been widely used to date.

[0003] Due to the low operating voltage of electric vehicle wheel hub motor and the small number of turns of winding, each phase winding on the corresponding stator tooth is electrically connected in series. Therefore, on the same base, the rated speed of the motor is proportional to the number of turns of winding. After changing the number of turns of winding, the speed range of the motor changes greatly. Therefore, in order to reduce the speed range of the motor, many motor manufacturers have to reduce the number of turns of winding on some stator teeth (we call it non-equal number of turns winding). As a result, the power of the motor decreases, the starting torque becomes smaller, the motor pulsating torque component increases, the working noise becomes larger, and the working stability of the motor becomes worse.

[0004] Due to the low number of turns of winding, the traditional series winding structure uses multi-strand wire and parallel winding process, which is difficult to achieve orderly and uniform winding structure even through automatic equipment. Therefore, the stator slot fill factor cannot be effectively improved, and the power of the wheel hub motor is insufficient. SUMMARY

[0005] The utility model aims at providing a double-slot multi-winding parallel stator structure with reasonable structure, which adopts double-slot multi-winding parallel method to improve the slot fill factor, the speed of the motor and the overload capacity.

[0006] The utility model is achieved as follows:

[0007] A double-slot multi-winding parallel stator structure includes a stator and a coil. The outer side of the stator is evenly distributed with a plurality of outer teeth. A stator slot is arranged between adjacent two outer teeth. The coil is arranged around the adjacent two outer teeth. The coil and the two outer teeth form a winding. The winding is provided with a head lead-out wire and a tail lead-out wire. The head lead-out wires of the same type of winding are connected to each other. The tail lead-out wires of the same type of winding are connected to each other. The head lead-out wire and the tail lead-out wire are both extended to one side of the outer tooth.

[0008] In the double-slot multi-winding parallel stator structure, the windings are three-phase windings, namely U-phase windings, V-phase windings and W-phase windings, and the U-phase windings, the V-phase windings and the W-phase windings are arranged in sequence, and the V-phase windings are located between the W-phase windings and the U-phase windings.

[0009] In the double-slot multi-winding parallel stator structure, the coils in a single winding are one.

[0010] In the double-slot multi-winding parallel stator structure, the number of stator slots is a multiple of 12.

[0011] In the double-slot multi-winding parallel stator structure, the number of stator slots is 36 or 48 or 60 or 72.

[0012] The utility model discloses compared with prior art outstanding and beneficial technical effect is:

[0013] The utility model discloses a stator is provided with a plurality of windings, and a plurality of windings are connected together according to different categories, which ensures the slot fill factor, and can improve the corresponding power, the motor speed and overload capacity are stronger. ACCURACY OF DRAWINGS

[0014] Figure 1 It is the structural diagram of the utility model.

[0015] Figure 2 It is the A place of the utility model of the enlarged view.

[0016] 1 - stator, 2 - outer tooth, 3 - stator slot, 10 - coil. DETAILED DESCRIPTION

[0017] The utility model will be further described in conjunction with the specific embodiment of the accompanying drawings:

[0018] As Figure 1 And Figure 2 Shown: a double-slot multi-winding parallel stator structure, including stator 1 and coil 10, the outer side of stator 1 is evenly distributed with a plurality of outer teeth 2, and the stator slot 3 is arranged between the adjacent two outer teeth 2, the coil 10 is arranged around the adjacent two outer teeth 2, the coil 10 and two outer teeth 2 form a winding, the winding is provided with head lead-out wire and tail lead-out wire, the head lead-out wire of the same category winding is connected with each other, the tail lead-out wire of the same category winding is connected with each other, the head lead-out wire and tail lead-out wire are all extended to the side of outer tooth, specifically, the head lead-out wire and tail lead-out wire are all extended to the side of outer tooth, which is to facilitate the parallel connection of the winding, a plurality of windings are connected together according to different categories, which ensures the slot fill factor, and can improve the corresponding power, the motor speed and overload capacity are stronger.

[0019] In the double-slot multi-winding parallel stator structure, the windings are three-phase windings, namely a U-phase winding, a V-phase winding and a W-phase winding, the U-phase winding, the V-phase winding and the W-phase winding are arranged in sequence, and the V-phase winding is located between the W-phase winding and the U-phase winding, which is specifically to facilitate the arrangement and identification of the windings.

[0020] In the double-slot multi-winding parallel stator structure, the number of coils in a single winding is one, which is specifically to facilitate the mechanical equipment to wind the coils on the outer teeth.

[0021] In the double-slot multi-winding parallel stator structure, the number of stator slots 3 is a multiple of 12.

[0022] In the double-slot multi-winding parallel stator structure, the number of stator slots 3 is 36 or 48 or 60 or 72.

[0023] The above embodiments are only preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, so that: any equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A double slot multi-winding parallel stator structure, characterized by: The motor comprises a stator (1) and a coil (10), the stator (1) is uniformly provided with a plurality of outer teeth (2), a stator slot (3) is arranged between adjacent two outer teeth (2), the coil (10) is arranged around the adjacent two outer teeth (2), the coil (10) and the two outer teeth (2) form a winding, the winding is provided with a head lead-out wire and a tail lead-out wire, the head lead-out wires of windings of the same category are connected with each other, the tail lead-out wires of windings of the same category are connected with each other, and the head lead-out wire and the tail lead-out wire are arranged to extend to one side of the outer tooth.

2. The dual slot multi-winding parallel stator structure of claim 1, wherein: The winding is a three-phase winding, which is a U-phase winding, a V-phase winding and a W-phase winding, the U-phase winding, the V-phase winding and the W-phase winding are arranged in sequence, and the V-phase winding is located between the W-phase winding and the U-phase winding.

3. The dual slot multi-winding parallel stator structure of claim 1 or 2, wherein: The coil in a single winding is one.

4. The dual slot multi-winding parallel stator structure of claim 3, wherein: The number of the stator slots (3) is a multiple of 12.

5. The dual slot multi-winding parallel stator structure of claim 4, wherein: The number of the stator slots (3) is 36, 48, 60 or 72.

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