CN106230212A - A kind of single phase multi high frequency aluminum winding electric machine - Google Patents

Abstract

The present invention relates to a motor, in particular to a single-phase multi-pole high-frequency aluminum winding motor used in the electromechanical compound transmission of vehicles, which abandons the enameled wire winding structure in the traditional motor stator and uses a single guide bar as the single-phase winding , The end of the motor is reduced, and the consumption of aluminum and iron core materials is reduced, which not only greatly reduces the weight of the motor, improves the power density, but also reduces the manufacturing cost to a certain extent.

Description

A single-phase multi-pole high-frequency aluminum winding motor

technical field

The invention relates to a motor, in particular to a single-phase, multi-pole, high-frequency aluminum winding motor used in electromechanical compound transmission of vehicles.

Background technique

For electric vehicles, due to the limited overall space, vehicle motors need to have high power density. Due to the constraints of the internal space of electric vehicles, vehicle motors are mostly designed to be flat. However, the power density of flat motors is very sensitive to the tip length, and an increase in the tip length will greatly reduce the power density. Traditional motor windings mostly use three-phase windings and are composed of multi-turn coils, resulting in increased axial length and complicated wire embedding process. Not only does it require more enameled wires, it consumes more copper, the manufacturing cost is high, and the weight of the motor is heavy. In addition, due to the low resistivity of copper, the skin effect is obvious at high frequencies and the loss is large. In terms of motor failure, traditional motors often cause insulation damage due to excessive temperature in the coil during operation.

Contents of the invention

Aiming at the problems existing in the above-mentioned prior art, the present invention provides a single-phase multi-pole high-frequency aluminum winding motor, which abandons the enameled wire winding structure in the traditional motor stator, reduces the size of the motor end, and reduces the aluminum and iron core materials. The consumption not only greatly reduces the weight of the motor, improves the power density, but also reduces the manufacturing cost to a certain extent.

The single-phase multi-pole high-frequency aluminum winding motor has the following structure, including: stator slots, stator teeth, stator yokes, permanent magnets, rotor yokes and guide bars; the stator slots are straight slots, and the guide bars are embedded In the stator slot, it is used as a single-phase winding; the stator teeth and the stator slot are alternately arranged on the stator yoke; the permanent magnet is arranged on the rotor yoke.

Preferably, the guide bar is a single guide bar, and the stator slot is wound in an S-shaped arrangement, and aluminum is preferably used as the material.

Preferably, the number ratio of the stator slots, the stator teeth and the permanent magnets is 1:1:1.

Preferably, the tooth width of the stator teeth and the thickness ratio of the stator yoke and the rotor yoke are 2:1:1. The stator tooth tips and roots have the same width in the circumferential direction.

Preferably, the motor may adopt an outer rotor inner stator structure or an inner rotor outer stator structure.

Preferably, a vehicle is provided, which adopts the above electric motor.

Preferably, a hub motor is provided, which adopts the above motor structure in the form of an outer rotor and an inner stator.

The invention can realize the following beneficial effects: the winding coefficient of the motor is equal to 1, and the utilization rate of the magnetic field and the full rate of the stator slot are relatively high. The length of the end is greatly reduced, the amount of wires is saved, and the embedded wire process is simplified. When the aluminum guide bar is used, the mass is lighter than the copper guide bar, so that the motor is lighter in weight, and effectively reduces the high-frequency skin effect and reduces the high-frequency winding loss; due to the increase in the number of poles, the pole pitch decreases, and each pair of magnetic poles is closed. At the magnetic circuit end, the thickness of the stator yoke and rotor yoke is reduced to only half of the tooth width, which saves the core material and facilitates the heat dissipation of the motor, effectively improving the power density of the motor; The output voltage waveform is close to a square wave, which is convenient for rectification and power generation, and improves the utilization rate of the waveform. The shape of the motor is further flattened, which is more suitable for electric vehicles and other occasions with more restrictions on installation space.

Description of drawings

Fig. 1 is a schematic diagram of a single-phase multi-pole high-frequency aluminum winding motor of the present invention

Fig. 2 is a partial enlarged view of the single-phase multi-pole high-frequency aluminum winding motor of the present invention

Fig. 3 is a schematic diagram of a single-phase winding formed by S-shaped arrangement of guide bars in the present invention

detailed description

Hereinafter, specific embodiments of the present invention will be described in detail in conjunction with the accompanying drawings. As shown in Figures 1 and 2, a single-phase multi-pole high-frequency aluminum winding motor includes: stator slots (1), stator teeth (2), stator yokes (3), permanent magnets (4), rotor yokes (5) and conductors bar (6); the stator slot (1) is a straight slot, and the guide bar (6) is embedded in the stator slot (1) for use as a single-phase winding; the stator teeth (2) and The stator slots (1) are arranged in a staggered manner on the stator yoke (3); the permanent magnets (4) are arranged on the rotor yoke (5).

In a preferred embodiment of the present application, the guide bar (6) adopts a single guide bar as shown in FIG. 3 in an S-shaped arrangement to wrap around the stator slot (1). Assuming that the motor has 36 slots, the guide bar enters from the end face of the first slot A, enters the end face of the second slot B from the end face of the first slot B, and then enters the end face of the third slot A from the end face of the second slot A, and so on. Lead out from the end face of the 36th slot A to form an S-shaped winding.

In a preferred embodiment of the present application, the material of the guide bar (6) is aluminum.

In a preferred embodiment of the present application, the quantity ratio of the stator slots (1), the stator teeth (2) and the permanent magnets (4) is 1:1:1.

In a preferred embodiment of the present application, the ratio of the tooth width of the stator teeth (2) and the thickness of the stator yoke (3) to the thickness of the rotor yoke (5) is 2:1:1.

The maximum number of poles of the permanent magnet (4) is limited by the processing technology of the stator silicon steel sheet and the permanent magnet. The specific number depends on the specification of the generator, but usually it must be an integer multiple of 2 and cannot be lower than a certain number of poles , should ensure its multi-polar characteristics. The magnetic flux generated by a certain N pole of the permanent magnet (4) flows into the adjacent stator tooth (2), divides into two paths at the top of the stator tooth (2), flows into the stator yoke (3), and then flows through the adjacent two stator teeth, then pass through the S pole adjacent to the N pole, and finally return to the N pole through the rotor yoke (5). Therefore, assuming that the air gap magnetic density of the generator is 0.8T, and the working magnetic density of the stator magnetic steel is 1.4T, the ratio of the thickness of the permanent magnet (4) to the tooth width of the stator tooth (2) is 7:4; at the same time, the stator tooth (2) ) tooth width to stator yoke (3) and rotor yoke (5) ratio is 2:1:1; therefore the thickness of permanent magnet (4), stator tooth (2) tooth width, stator yoke (3) and rotor yoke thickness The ratio is 7:4:2:2. The stator slot (1) is in the shape of an open slot, and the cross-sectional shape of a single aluminum guide bar (6) is similar to the stator slot (1) in shape and size, and is very easy to be embedded in the slot.

In a preferred embodiment of the present application, the motor has an outer rotor inner stator structure.

In a preferred embodiment of the present application, the motor has an inner rotor and outer stator structure.

In a preferred embodiment of the present application, a vehicle is provided, which adopts the above-mentioned single-phase multi-pole high-frequency aluminum winding motor.

In a preferred embodiment of the present application, a hub motor is provided, which adopts the above motor structure in the form of an outer rotor and an inner stator.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (10)

1. a single phase multi high frequency aluminum winding electric machine, it is characterised in that: including: stator slot (1), stator tooth (2), stator yoke (3), permanent magnet (4), rotor yoke (5) and sliver (6)；Described stator slot (1) is straight trough, and described sliver (6) is embedded described In stator slot (1), for as single-phase winding；Described stator tooth (2) and described stator slot (1) are staggered and are arranged on stator yoke (3) on；Described permanent magnet (4) is arranged on described rotor yoke (5).

2. motor as claimed in claim 1, it is characterised in that: described sliver (6) is single sliver.

3. the motor as according to any one of aforementioned right is wanted, it is characterised in that: described sliver (6) uses S type to arrange and is wound around institute State stator slot (1).

4. the motor as according to any one of aforementioned right is wanted, it is characterised in that: the material of described sliver (6) is aluminum.

5. as aforementioned right want according to any one of motor, it is characterised in that: described stator slot (1), described stator tooth (2) with The quantity of described permanent magnet (4) is than for 1:1:1.

6. the motor as according to any one of aforementioned right is wanted, it is characterised in that: the facewidth of described stator tooth (2), described stator The thickness of yoke (3) thickness and described rotor yoke (5) ratio is for 2:1:1.

7. the motor as according to any one of aforementioned right is wanted, it is characterised in that: described motor is outer rotor inner stator structure.

8. the motor as according to any one of aforementioned right is wanted, it is characterised in that: described motor is internal rotor outer stator structure.

9. a vehicle, it is characterised in that: use such as motor in any one of the preceding claims wherein.

10. a wheel hub motor, it is characterised in that its structure is motor as claimed in claim 7.