阅读说明：本技术 多相永磁磁阻电机 (polyphase permanent magnet reluctance motor ) 是由 寇宝泉 赵元胜 杨小宝 于 2019-09-26 设计创作，主要内容包括：多相永磁磁阻电机,涉及电机技术领域,具体涉及多相永磁磁阻电机。本发明解决了现有开关磁阻电机的转矩密度低、峰值电流大、绕组铜耗高；各相绕组工作在开关状态,导致电机转矩波动大、振动与噪声高的问题。本发明所述的多相永磁磁阻电机,通过在定子侧引入永磁体励磁,使绕组在全电周期内工作并产生单向转矩,提升了电机的转矩密度；电机采用双极性电流驱动,提高了绕组利用率,降低了电机铜耗,同时可利用传统的逆变电路驱动,驱动系统成本低、实用性高；实现了绕组磁链与反电势的正弦化,减小了转矩波动及电机的振动、噪声。本发明适用于作为电机使用。(Multiphase permanent magnet reluctance motor relates to motor technical field, concretely relates to multiphase permanent magnet reluctance motor. The invention solves the problems of low torque density, large peak current and high copper consumption of the winding of the existing switched reluctance motor; the phase windings work in a switching state, so that the problems of large torque fluctuation, high vibration and high noise of the motor are caused. According to the multiphase permanent magnet reluctance motor, permanent magnet excitation is introduced to the stator side, so that a winding works in a full electric cycle and generates unidirectional torque, and the torque density of the motor is improved; the motor is driven by bipolar current, so that the utilization rate of a winding is improved, the copper consumption of the motor is reduced, and meanwhile, the motor can be driven by using a traditional inverter circuit, so that the driving system is low in cost and high in practicability; the sine of the winding flux linkage and the counter potential is realized, and the torque fluctuation, the vibration and the noise of the motor are reduced. The invention is suitable for being used as a motor.)

1. the multiphase permanent magnet reluctance motor is characterized by comprising a stator and a rotor, wherein an air gap is formed between the stator and the rotor, and the stator comprises a stator core (1), a stator winding and a permanent magnet (104); the rotor includes a rotor core (2); the rotor core (2) is cylindrical, and a plurality of rotor slots are arranged on the side surface of an air gap of the rotor core (2) at equal intervals along the circumferential direction; the rotor slots form rotor teeth arranged at equal intervals on the side surface of an air gap of the rotor core (2);

The stator core (1) is cylindrical, a plurality of first stator slots (102) are arranged on the side surface of an air gap of the stator core (1) at equal intervals along the circumferential direction, a second stator slot (101) is further formed between every two adjacent first stator slots (102) to form 2nm stator teeth, wherein n is a positive integer, m is the phase number of the motor, and m is larger than or equal to 3;

The widths of the first stator slot (102) and the second stator slot (101) are different;

two stator teeth with a gap of a stator slot II (101) form a group;

Each group of stator teeth is wound with a coil (103); all the coils (103) are connected into an m-phase stator winding, and the surface of one of every two adjacent groups of stator teeth is adhered with a permanent magnet (104); the permanent magnet (104) is magnetized in a radial direction or in a parallel direction; the permanent magnets (104) on each group of stator teeth are oppositely charged.

2. The multiphase permanent magnet reluctance motor is characterized by comprising a stator and a rotor, wherein an air gap is formed between the stator and the rotor, and the stator comprises a stator core (1), a stator winding and a permanent magnet (104);

the rotor includes a rotor core (2); the rotor core (2) is cylindrical, and a plurality of rotor slots are arranged on the side surface of an air gap of the rotor core (2) at equal intervals along the circumferential direction; the rotor slots form rotor teeth arranged at equal intervals on the side surface of an air gap of the rotor core (2);

The stator core (1) is cylindrical, a plurality of first stator slots (102) are arranged on the side surface of an air gap of the stator core (1) at equal intervals along the circumferential direction, a second stator slot (101) is further formed between every two adjacent first stator slots (102) to form 2nm stator teeth, wherein n is a positive integer, m is the phase number of the motor, and m is larger than or equal to 3;

The widths of the first stator slot (102) and the second stator slot (101) are different;

two stator teeth with a gap of a stator slot II (101) form a group;

each group of stator teeth is wound with a coil (103); all the coils (103) are connected into an m-phase stator winding, and a permanent magnet (104) is attached to the surface of one stator tooth in each group of stator teeth; two stator teeth adhered with the permanent magnet (104) and two stator teeth not adhered with the permanent magnet (104) are arranged at intervals;

the permanent magnet (104) is magnetized in a radial direction or in a parallel direction; the magnetizing directions of the permanent magnets (104) on the two adjacent stator teeth adhered with the permanent magnets (104) are the same.

3. the multiphase permanent magnet reluctance motor is characterized by comprising a stator and a rotor, wherein an air gap is formed between the stator and the rotor, and the stator comprises a stator core (1), a stator winding and a permanent magnet (104);

the rotor includes a rotor core (2); the rotor core (2) is cylindrical, and a plurality of rotor slots are arranged on the side surface of an air gap of the rotor core (2) at equal intervals along the circumferential direction; the rotor slots form rotor teeth arranged at equal intervals on the side surface of an air gap of the rotor core (2);

the stator core (1) is cylindrical, a plurality of first stator slots (102) are arranged on the side surface of an air gap of the stator core (1) at equal intervals along the circumferential direction, a second stator slot (101) is further formed between every two adjacent first stator slots (102) to form 2nm stator teeth, wherein n is a positive integer, m is the phase number of the motor, and m is larger than or equal to 3;

the widths of the first stator slot (102) and the second stator slot (101) are different;

Two stator teeth with a gap of a stator slot II (101) form a group;

each group of stator teeth is wound with a coil (103), and all the coils (103) are connected into an m-phase stator winding;

each stator tooth is attached with a permanent magnet (104), and the permanent magnet (104) is magnetized in the radial direction or in parallel;

The magnetizing directions of the permanent magnets (104) on the two stator teeth of the same group are opposite;

The gap is that the magnetizing directions of the permanent magnets (104) on the two stator teeth of the first stator slot (102) are the same.

4. the multiphase permanent magnet reluctance motor is characterized by comprising a stator and a rotor, wherein an air gap is formed between the stator and the rotor, and the stator comprises a stator core (1), a stator winding and a permanent magnet (104); the rotor includes a rotor core (2); the rotor core (2) is cylindrical, and a plurality of rotor slots are arranged on the side surface of an air gap of the rotor core (2) at equal intervals along the circumferential direction; the rotor slots form rotor teeth arranged at equal intervals on the side surface of an air gap of the rotor core (2);

The stator core (1) is cylindrical, a plurality of stator slots III (105) are arranged on the side surface of an air gap of the stator core (1) at equal intervals along the circumferential direction to form 2nm stator teeth, wherein n is a positive integer, m is the phase number of a motor, and m is more than or equal to 3;

each stator tooth is wound with a coil (103); all the coils (103) are connected into m symmetrical stator windings, each stator tooth is attached with a permanent magnet (104), and the permanent magnets (104) are magnetized in the radial direction or in parallel; the magnetizing directions of the permanent magnets (104) on the stator teeth wound by the m adjacent coils (103) belonging to different phases are the same, and the magnetizing directions of the permanent magnets (104) on the stator teeth wound by the coils (103) belonging to the same phase are opposite.

5. the multiphase permanent magnet reluctance motor is characterized by comprising a stator and a rotor, wherein an air gap is formed between the stator and the rotor, and the stator comprises a stator core (1), a stator winding and a permanent magnet (104); the rotor includes a rotor core (2); the rotor core (2) is cylindrical, and a plurality of rotor slots are arranged on the side surface of an air gap of the rotor core (2) at equal intervals along the circumferential direction; the rotor slots form rotor teeth arranged at equal intervals on the side surface of an air gap of the rotor core (2);

the stator core (1) is cylindrical, a plurality of first stator slots (102) are arranged on the side surface of an air gap of the stator core (1) at equal intervals along the circumferential direction, two second stator slots (101) are further arranged between every two adjacent first stator slots (102) at equal intervals to form 2nm stator teeth, wherein n is a positive integer, m is the phase number of the motor, and m is larger than or equal to 3;

The widths of the first stator slot (102) and the second stator slot (101) are different;

coils (103) are embedded in each stator slot I (102) and each stator slot II (101) to form m symmetrical stator windings;

the surface of each stator tooth is adhered with a permanent magnet (104);

the permanent magnet (104) is magnetized in the radial direction or in parallel;

the magnetizing directions of the permanent magnets (104) on each mk adjacent stator teeth are the same, the magnetizing directions of the permanent magnets (104) on the mk stator teeth are opposite to the magnetizing directions of the permanent magnets (104) on the mk adjacent stator teeth on two sides of the permanent magnets, and k is an integer.

6. A multiphase permanent magnet reluctance machine according to claim 1, 2, 3, 4 or 5, wherein the permanent magnets (104) are shaped as tiles or plates.

7. The multiphase permanent magnet reluctance machine according to claim 1, 2, 3 or 5, wherein a magnetic shield is provided in each of the first stator slot (102) and the second stator slot (101).

8. a multiphase permanent magnet reluctance machine according to claim 1, 2, 3, 4 or 5, wherein the rotor is made of a highly permeable material.

9. The multiphase permanent magnet reluctance machine of claim 1, 2, 3, 4 or 5, wherein the stator is formed by m single-phase stator units which are coaxially connected in series along the circumferential direction; the m stator units sequentially have a difference of 360 DEG/m in electrical angle along the circumferential direction.

10. the multiphase permanent magnet reluctance machine of claim 9, wherein the pitch of the rotor is 2 times the pitch of the stator of the single phase stator unit, and the stator winding of the single phase stator unit is a single phase winding.

Technical Field

the invention belongs to the technical field of motors, and particularly relates to a multiphase permanent magnet reluctance motor.

background

the structure of a traditional switched reluctance motor is shown in fig. 6, wherein a stator and a rotor of the motor are both in a salient pole structure, windings are concentrated windings, and the end parts of the concentrated windings are short. By sequentially energizing the stator field windings, the stator poles interact with the rotor poles to produce torque. Because the rotor is not provided with the winding and the permanent magnet 104 and is only formed by laminating silicon steel sheets, the rotor can bear higher mechanical stress and is suitable for high-speed operation; the motor has low cost, simple structure, reliable operation and wide high-efficiency speed regulation range; the starting torque is high, and the starting current is small; the device can adapt to severe working environments such as high temperature, high humidity, strong vibration, large overload, high rotating speed and the like, and is successfully applied to the fields of industry, energy, aerospace and the like.

however, the windings of each phase of the switched reluctance motor can obtain unidirectional torque only when operating within a half electrical cycle. The motor has low torque density due to the failure to work in the full electric cycle; reactive exciting current and active torque current in winding current are superposed, so that peak current is large and winding copper consumption is high; the windings of each phase work in a switching state, so that the motor has large torque fluctuation and high vibration and noise.

disclosure of Invention

the invention aims to solve the problems of low torque density, large peak current and high copper consumption of a winding of the existing switched reluctance motor; the problems of large motor torque fluctuation, high vibration and high noise caused by the fact that each phase winding works in a switch state are solved, and the multiphase permanent magnet reluctance motor is provided.

the first structure of the multiphase permanent magnet reluctance motor comprises a stator and a rotor, wherein an air gap is formed between the stator and the rotor, and the stator comprises a stator core 1, a stator winding and a permanent magnet 104; the rotor includes a rotor core 2; the rotor core 2 is cylindrical, and a plurality of rotor slots are arranged on the side surface of an air gap of the rotor core 2 at equal intervals along the circumferential direction; the plurality of rotor slots form rotor teeth arranged at equal intervals on the air gap side surface of the rotor core 2;

the stator core 1 is cylindrical, a plurality of first stator slots 102 are arranged on the side surface of an air gap of the stator core 1 at equal intervals along the circumferential direction, a second stator slot 101 is further arranged between every two adjacent first stator slots 102 to form 2nm stator teeth, wherein n is a positive integer, m is the phase number of a motor, and m is larger than or equal to 3;

The widths of the first stator slot 102 and the second stator slot 101 are different;

two stator teeth with the gap of the second stator slot 101 form a group;

each group of stator teeth is wound with a coil 103; all the coils 103 are connected into an m-phase stator winding, and a permanent magnet 104 is attached to the surface of one of every two adjacent groups of stator teeth; the permanent magnet 104 is magnetized in the radial direction or in parallel; the permanent magnets 104 on each set of stator teeth are oppositely charged.

the second structure of the multiphase permanent magnet reluctance motor comprises a stator and a rotor, wherein an air gap is formed between the stator and the rotor, and the stator comprises a stator core 1, a stator winding and a permanent magnet 104;

the rotor includes a rotor core 2; the rotor core 2 is cylindrical, and a plurality of rotor slots are arranged on the side surface of an air gap of the rotor core 2 at equal intervals along the circumferential direction; the plurality of rotor slots form rotor teeth arranged at equal intervals on the air gap side surface of the rotor core 2;

the stator core 1 is cylindrical, a plurality of first stator slots 102 are arranged on the side surface of an air gap of the stator core 1 at equal intervals along the circumferential direction, a second stator slot 101 is further arranged between every two adjacent first stator slots 102 to form 2nm stator teeth, wherein n is a positive integer, m is the phase number of a motor, and m is larger than or equal to 3;

The widths of the first stator slot 102 and the second stator slot 101 are different;

two stator teeth with the gap of the second stator slot 101 form a group;

each group of stator teeth is wound with a coil 103; all the coils 103 are connected into an m-phase stator winding, and a permanent magnet 104 is attached to the surface of one of each group of stator teeth; two stator teeth adhered with the permanent magnets 104 and two stator teeth not adhered with the permanent magnets 104 are arranged at intervals;

the permanent magnet 104 is magnetized in the radial direction or in parallel; the magnetizing directions of the permanent magnets 104 on the adjacent two stator teeth adhered with the permanent magnets 104 are the same.

The multiphase permanent magnet reluctance motor comprises a stator and a rotor, wherein an air gap is formed between the stator and the rotor, and the stator comprises a stator core 1, a stator winding and a permanent magnet 104;

the rotor includes a rotor core 2; the rotor core 2 is cylindrical, and a plurality of rotor slots are arranged on the side surface of an air gap of the rotor core 2 at equal intervals along the circumferential direction; the plurality of rotor slots form rotor teeth arranged at equal intervals on the air gap side surface of the rotor core 2;

The stator core 1 is cylindrical, a plurality of first stator slots 102 are arranged on the side surface of an air gap of the stator core 1 at equal intervals along the circumferential direction, a second stator slot 101 is further arranged between every two adjacent first stator slots 102 to form 2nm stator teeth, wherein n is a positive integer, m is the phase number of a motor, and m is larger than or equal to 3;

The widths of the first stator slot 102 and the second stator slot 101 are different;

Two stator teeth with the gap of the second stator slot 101 form a group;

Each group of stator teeth is wound with a coil 103; all coils 103 are connected into m-phase stator windings;

each stator tooth is attached with a permanent magnet 104, and the permanent magnet 104 is magnetized in the radial direction or in parallel;

The magnetizing directions of the permanent magnets 104 on the two stator teeth in the same group are opposite;

The gap is that the magnetizing directions of the permanent magnets 104 on the two stator teeth of the first stator slot 102 are the same.

the multiphase permanent magnet reluctance motor comprises a stator and a rotor, wherein an air gap is formed between the stator and the rotor, and the stator comprises a stator core 1, a stator winding and a permanent magnet 104; the rotor includes a rotor core 2; the rotor core 2 is cylindrical, and a plurality of rotor slots are arranged on the side surface of an air gap of the rotor core 2 at equal intervals along the circumferential direction; the plurality of rotor slots form rotor teeth arranged at equal intervals on the air gap side surface of the rotor core 2;

The stator core 1 is cylindrical, a plurality of stator slots III are arranged on the side surface of an air gap of the stator core 1 at equal intervals along the circumferential direction to form 2nm stator teeth, wherein n is a positive integer, m is the phase number of a motor, and m is more than or equal to 3;

Each stator tooth is wound with a coil 103; all the coils 103 are connected into m symmetrical stator windings, each stator tooth is attached with a permanent magnet 104, and the permanent magnets 104 are magnetized in a radial direction or in parallel; the magnetizing directions of the permanent magnets 104 on the stator teeth wound by the m adjacent coils 103 belonging to different phases are the same, and the magnetizing directions of the permanent magnets 104 on the stator teeth wound by the m adjacent coils 103 belonging to the same phase are opposite.

The structure five of the multiphase permanent magnet reluctance motor comprises a stator and a rotor, wherein an air gap is formed between the stator and the rotor, and the stator comprises a stator iron core 1, a stator winding and a permanent magnet 104; the rotor includes a rotor core 2; the rotor core 2 is cylindrical, and a plurality of rotor slots are arranged on the side surface of an air gap of the rotor core 2 at equal intervals along the circumferential direction; the plurality of rotor slots form rotor teeth arranged at equal intervals on the air gap side surface of the rotor core 2;

the stator core 1 is cylindrical, a plurality of first stator slots 102 are arranged on the side surface of an air gap of the stator core 1 at equal intervals along the circumferential direction, two second stator slots 101 are further arranged between every two adjacent first stator slots 102 at equal intervals to form 2nm stator teeth, wherein n is a positive integer, m is the phase number of a motor, and m is more than or equal to 3;

the widths of the first stator slot 102 and the second stator slot 101 are different;

a coil 103 is embedded in each of the first stator slot 102 and the second stator slot 101 to form m symmetrical stator windings;

The surface of each stator tooth is adhered with a permanent magnet 104;

The permanent magnet 104 is magnetized in radial direction or in parallel;

the magnetizing directions of the permanent magnets 104 on each mk adjacent stator teeth are the same, and the magnetizing directions of the permanent magnets 104 on the mk stator teeth are opposite to those of the permanent magnets 104 on the mk adjacent stator teeth on two sides of the permanent magnets 104, wherein k is an integer.

According to the multiphase permanent magnet reluctance motor, permanent magnet excitation is introduced to the stator side, so that a winding works in a full electric cycle and generates unidirectional torque, and the torque density of the motor is improved; the motor is driven by bipolar current, so that the utilization rate of a winding is improved, the copper consumption of the motor is reduced, and meanwhile, the motor can be driven by using a traditional inverter circuit, so that the driving system is low in cost and high in practicability; the sine of the winding flux linkage and the back electromotive force is realized, and the torque fluctuation, the vibration and the noise of the motor are reduced; meanwhile, the characteristics of simple and firm structure and the like of the traditional switched reluctance motor are kept; the permanent magnet is adopted for excitation, and the motor has the advantages of simple structure, high efficiency, high power density, high reliability and high safety.

Drawings

Fig. 1 is a schematic structural diagram of a multiphase permanent magnet reluctance motor according to a first embodiment;

Fig. 2 is a schematic structural diagram of a multiphase permanent magnet reluctance motor according to a second embodiment;

fig. 3 is a schematic structural diagram of a multiphase permanent magnet reluctance motor according to a third embodiment;

fig. 4 is a schematic structural diagram of a multi-phase permanent magnet reluctance motor according to a fourth embodiment;

fig. 5 is a schematic structural diagram of a multi-phase permanent magnet reluctance motor according to a fifth embodiment;

Fig. 6 is a schematic structural view of a conventional switched reluctance motor.

Detailed Description

the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

it should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

the invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.