Dual three-phase permanent magnet synchronous motor

Abstract

The utility model relates to a dual three-phase permanent magnet synchronous motor, which is structurally characterized in that a stator comprises a stator iron core with a winding, a stator groove is arranged on the stator iron core, 32 magnetic conductive teeth are distributed around the stator groove, a rotor comprises a rotor iron core, a rotating shaft is arranged in a rotor hole in the center of the rotor iron core, and a permanent magnet is arranged in a permanent magnet groove of the rotor iron core. 36 stator groove shapes are uniformly distributed in the circumferential direction, and the interval angle between every two stator groove shapes is 5 degrees. A spacing groove is arranged in the middle of each stator groove to divide the stator groove into adjacent first and second grooves. The motor has the advantages that the structural design is simple, compact and reasonable, the cost is low, and the magnetic field action area between the stator and the rotor is increased by arranging the plurality of magnetic conductive teeth on the stator iron core with the winding, so that the effect of improving the torque density is achieved. And meanwhile, through the specially designed stator punching sheet groove type, the motor can effectively reduce temperature rise and motor noise, and the torque, the reliability and the efficiency of the motor can be improved under the condition that the rotating speed of the motor is not changed.

Description

TECHNICAL FIELD

[0001] The utility model relates to a double three-phase permanent magnet synchronous motor, and particularly relates to a double three-phase permanent magnet synchronous motor with improved torque density. BACKGROUND

[0002] With the continuous development of science and technology, permanent magnet synchronous motor drive technology has been widely used in industrial and civil fields due to its advantages of high efficiency, energy saving, environmental protection, etc. In particular, double three-phase permanent magnet synchronous motor drive technology has more advantages in the fields of transportation, wind power, electric tools, etc. In the field of transportation, double three-phase permanent magnet synchronous motor drive technology is applied to high-speed trains and urban rail transit systems, improving the operating efficiency and stability of the system. In the field of wind power, double three-phase permanent magnet synchronous motor drive technology is applied to wind turbine generators, reducing operating noise and improving power generation efficiency. In the field of electric tools, double three-phase permanent magnet synchronous motor drive technology improves the operating efficiency and durability of the tools and reduces maintenance costs.

[0003] With the increasing use of double three-phase permanent magnet synchronous motors in these fields, providing higher torque at low speed has become the main direction of research breakthroughs in recent years. The higher the torque, the wider the range of application, and the more competitive the market. To increase torque, the torque density must be increased during design. SUMMARY

[0004] The utility model provides a double three-phase permanent magnet synchronous motor, which aims to overcome the above-mentioned deficiencies in the prior art and effectively improve the torque density.

[0005] The technical solution of the utility model is a double three-phase permanent magnet synchronous motor, which comprises a stator and a rotor. The stator comprises a stator core with windings, and the stator core is provided with a stator slot shape. There are 32 magnetically conductive teeth distributed around the stator slot shape. The rotor comprises a rotor core, and a rotating shaft is arranged in the rotor hole at the center of the rotor core. Permanent magnets are arranged in the permanent magnet slots of the rotor core. The arrangement of the magnetically conductive teeth increases the magnetic field acting area between the stator and the rotor, thereby improving the torque density.

[0006] Preferably, the stator core is provided with two sets of windings, and the two sets of windings are respectively connected to corresponding three-phase alternating current power sources. The two sets of windings are respectively arranged in two stator slot shapes that are offset by 30°.

[0007] Preferably, the stator slot shapes are uniformly distributed around the circumference and there are a total of 36 stator slot shapes. The interval angle between each stator slot shape is 5°. This arrangement effectively reduces the temperature rise and noise of the motor.

[0008] Preferably, each of the stator slot shapes is provided with a spacing slot in the middle, each stator slot shape is separated into adjacent first and second slots by the spacing slot. A 72-slot structure is formed. The motor can be further reduced in temperature rise and motor noise.

[0009] The utility model discloses a simple and compact structure design, lower cost, through the multiple magnetic conduction tooth of opening on the stator core of winding, the magnetic field acting area between stator and rotor is increased, and the effect of improving torque density is further reached. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is the structure schematic diagram of the utility model double three-phase permanent magnet synchronous motor.

[0011] 1 in drawing is stator core, 2 is magnetic conduction tooth, 3 is rotor core, 4 is permanent magnet, 5 is rotating shaft, 31 is rotor hole, 11 is stator slot shape, 111 is first slot, 112 is second slot, 12 is spacing slot. DETAILED DESCRIPTION

[0012] The utility model will be further explained in detail in conjunction with embodiment and specific implementation.

[0013] As Figure 1 Shown, a double three-phase permanent magnet synchronous motor, its structure includes stator and rotor, the stator includes the stator core 1 of winding, is equipped with stator slot shape 11 on stator core 1, and stator slot shape 11 is distributed with magnetic conduction tooth 2 around, preferably 32, the rotor includes rotor core 3, is equipped with rotating shaft 5 in the rotor hole 31 of rotor core 3 center, and the permanent magnet slot of rotor core 3 is equipped with permanent magnet 4. The stator core 1 of the present application is designed with a special stator slot shape 11, which is evenly distributed around the circumference and has a total of 36. Each stator slot shape 11 has an interval angle of 5° between them. Each stator slot shape 11 is provided with a spacing slot 12 in the middle, which separates the adjacent first slot 111 and second slot 112. This forms a 72-slot structure.

[0014] According to the above structure, the stator core 1 is provided with two sets of windings, and the two sets of windings are connected to corresponding three-phase alternating current power sources. The two sets of windings exist in two stator slot shapes 11 that are offset by 30°.

[0015] The multiple magnetic conduction teeth 2 evenly opened on the stator core 1 with winding can increase the magnetic field acting area between the stator and the rotor, thereby improving the torque density. The structure is simple, compact and reasonable, and the cost is low. Under the condition that the motor speed remains unchanged, the motor torque density can be improved, thereby improving the torque of the double three-phase permanent magnet synchronous motor.

[0016] Each of the above components is of the prior art, and a person skilled in the art can use any model and prior design that can achieve the corresponding function.

[0017] The above merely describes preferred embodiments of the present application, and it should be noted that, for those skilled in the art, without departing from the inventive concept, a number of modifications and improvements can be made, which all fall within the protection scope of the present application.

Claims

1. A dual three-phase permanent magnet synchronous motor, characterized in that: The application relates to a motor, which comprises a stator and a rotor, the stator comprises a stator core (1) with windings, the stator core (1) is provided with stator slot shapes (11), 32 magnetically conductive teeth (2) are distributed around the stator slot shapes (11), the rotor comprises a rotor core (3), a rotating shaft (5) is arranged in a rotor hole (31) in the center of the rotor core (3), and permanent magnets (4) are arranged in permanent magnet grooves of the rotor core (3).

2. A dual three-phase permanent magnet synchronous motor as claimed in claim 1, characterized in that, The stator core (1) is provided with two sets of windings, the two sets of windings are connected with corresponding three-phase alternating current power sources respectively, and the two sets of windings exist in two stator slot shapes (11) which are staggered by 30 DEG respectively.

3. A dual three-phase permanent magnet synchronous motor as claimed in claim 2, characterized in that, The stator slot shapes (11) are uniformly distributed in a circle and totally 36 in number, and the interval angle between each stator slot shape (11) is 5 DEG.

4. A dual three-phase permanent magnet synchronous motor as claimed in claim 3, characterized in that, Each stator slot shape (11) is provided with a spacing groove (12) in the middle, and each stator slot shape (11) is divided into adjacent first grooves (111) and second grooves (112) by the spacing groove (12).

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