CN202856573U - Multivariant switch magnetic resistance motor - Google Patents

Abstract

The utility model discloses a multi-degree-of-freedom switched reluctance motor, which comprises an inner rotor, a stator surrounding the inner rotor, an outer rotor surrounding the stator, and an air gap is arranged between the two rotors and the stator; the inner rotor and the outer rotor The side facing the stator is provided with non-winding salient pole teeth, the inner and outer sides of the stator are provided with salient pole teeth, the inner and outer sides of the stator are respectively provided with inner windings and outer windings sleeved on the salient pole teeth, the yoke of the stator Internally embedded with a magnetic isolation ring. The utility model integrates two sets of motor systems in the space of the original switched reluctance motor. The inner and outer motors are independent of each other and can be controlled separately. They work in different states to meet the requirements of the load. Two power paths are provided, which greatly improves the efficiency of the system. reliability and flexibility.

Description

A Multi-DOF Switched Reluctance Motor

technical field

The utility model belongs to the field of motor manufacturing and its application, and relates to a multi-degree-of-freedom switched reluctance motor, which is suitable for a switched reluctance motor with any number of phases and any number of stator and rotor slots. the

Background technique

With the development of power electronics technology and control technology, and the rapid rise in the price of rare earth permanent magnet materials, the application of switched reluctance motor systems without permanent magnets has become more and more widespread. The switched reluctance motor has a double salient pole structure. The stator and rotor are made of laminated silicon steel sheets. There is no permanent magnet or winding on the rotor. There are only concentrated windings on the stator. It works according to the principle of "minimum reluctance". Switched reluctance motors have low manufacturing and maintenance costs, simple and reliable structure, good robustness, small starting current, large torque, wide speed range, fast dynamic response, fault tolerance, and no permanent magnets and windings on the rotor. Ideal for high speed operation. Switched reluctance motors have a wide range of applications, and have shown competitiveness in industrial speed control systems, household appliances, and electric drives. Especially in the field of electric vehicles, it has inherent advantages and shows strong development potential. the

The currently proposed switched reluctance motors mainly have a stator and a rotor structure, and the inner rotor structure is the most used. Such a structure cannot produce sufficient power density and control flexibility in some occasions. Therefore, the utility model proposes a new type of multi-degree-of-freedom switched reluctance motor. By cleverly combining two switched reluctance motors, a multi-degree-of-freedom switched reluctance motor with multiple operating modes is formed to further expand Applications of switched reluctance motors. the

Utility model content

Technical problem: The utility model provides a multi-degree-of-freedom switched reluctance motor with higher power density and control flexibility. the

Technical solution: The multi-degree-of-freedom switched reluctance motor of the present invention includes an inner rotor, a stator surrounding the inner rotor, and an outer rotor surrounding the stator, and an air gap is arranged between the two rotors and the stator; the inner rotor and the outer rotor The side facing the stator is provided with non-winding salient pole teeth, the inner and outer sides of the stator are provided with salient pole teeth, the inner and outer sides of the stator are respectively provided with inner windings and outer windings sleeved on the salient pole teeth, the yoke of the stator Internally embedded with a magnetic isolation ring. the

In the utility model, both the inner winding and the outer winding are multi-phase centralized armature windings. the

Compared with the common single-stator and single-rotor switched reluctance motor, the multi-degree-of-freedom switched reluctance motor of the utility model can be equivalent to a complex of two common switched reluctance motors, and the inner rotor and the iron core inside the stator And the armature winding constitutes an inner motor, the outer rotor and the iron core and armature winding on the outside of the stator constitute an outer motor, the magnetic circuit of the inner winding of the stator and the magnetic circuit of the outer winding can be isolated by the magnetic isolation ring. Therefore, the new multi-degree-of-freedom switched reluctance motor can be regarded as two independent motors that do not affect each other, and only rely on the stator part to achieve mechanical integration, but there is no coupling between the magnetic circuit and the circuit. the

It should be pointed out that parameters such as stator-rotor cogging and phase numbers of the new multi-degree-of-freedom switched reluctance motor proposed by the utility model can be flexibly adjusted according to system performance requirements. the

Beneficial effects: the existing double-rotor switched reluctance motor composed of three parts: stator, intermediate rotor and inner rotor has a set of armature windings on the inner teeth of the stator, no winding on the intermediate rotor, and an armature winding on the teeth of the inner rotor. Set of armature windings. This structure determines that it must use brushes and slip rings to complete the energization of the inner rotor winding, and the use of brushes and slip rings will greatly reduce the reliability of the motor. The multi-degree-of-freedom switched reluctance motor of the utility model does not need brushes and slip rings, which shows advantages. Compared with the prior art, the utility model has the following advantages:

1. The motor does not need to use permanent magnets, the cost of materials and production is low, and it can work in harsh environments. the

2. The rotating part of the motor does not need windings, thereby eliminating the need for brushes and slip rings, greatly improving the reliability of the motor, reducing maintenance costs, and especially avoiding the problem of serious temperature rise of the inner rotor of common dual-rotor motors. the

3. There are neither windings nor permanent magnets on the inner and outer rotors of the motor, so the moment of inertia is small, and the speed regulation response is fast, which is suitable for high-speed operation. the

4. The winding is a concentrated coil with low winding difficulty and short ends, which effectively reduces copper consumption and facilitates the heat dissipation of the motor. the

5. The motor has two sets of inner and outer stator windings, and the mutual inductance between the two can be ignored (the circuit and the magnetic circuit are completely isolated), which realizes the complete decoupling of the inner motor and the outer motor, and the inner motor and the outer motor can be independently and flexibly controlled. They can also be mutually redundant in case of failure. the

6. The motor has good fault-tolerant performance, and the internal and external motor parameters can be flexibly selected to improve redundancy and reliability. the

7. The space utilization rate of the motor is greatly improved, and the efficiency and power density of the motor system are higher than those of ordinary switched reluctance motors, and the structure is more compact. the

8. The structure is flexible, and the number of phases and the number of slots of the inner motor and the outer motor can be selected according to needs, and the number of phases and the number of slots of the inner motor and the outer motor can be the same or different. the

9. The two internal and external motor systems are independent of each other, have redundancy, and can be flexibly controlled to adjust their working status, and can work in various modes such as electric-electric, power-electric, electric-power, power-power, etc., to meet the load different needs. the

10. It can complete the function of electrical stepless speed regulation to replace planetary gears and brushed motor speed regulation devices, and has great application prospects in hybrid electric vehicles and wind power generation systems. the

Description of drawings

Fig. 1 is a transverse cross-sectional structure schematic diagram of a multi-degree-of-freedom switched reluctance motor with three-phase stator 12 slots/rotor 8 poles of the inner motor and an outer motor three-phase stator 12 slots/rotor 8 poles of the present utility model. the

There are: an inner rotor 1, a stator 2, an outer rotor 3, an inner winding 21, an outer winding 22, and a magnetic isolation ring 23. the

Detailed ways

Taking the multi-degree-of-freedom switched reluctance motor of an inner motor three-phase stator with 12 slots/rotor 8 poles and an outer motor with three-phase stator 12 slots/rotor 8 poles as shown in Figure 1 as an example, the utility model is described in detail Technical solutions. the

The motor of the utility model includes an inner rotor 1, a stator 2 surrounding the inner rotor 1, and an outer rotor 3 surrounding the stator 2, and an air gap is arranged between the two rotors and the stator 2; the inner rotor 1 and the outer rotor 3 face the stator 2 One side of the stator 2 is provided with salient pole teeth without windings, and the inner and outer sides of the stator 2 are provided with salient pole teeth. The yoke of 2 is embedded with a magnetic isolation ring 23 . In this embodiment, the inner rotor 1 has 8 salient pole teeth, the stator 2 has a double salient pole structure, the inner and outer sides of the stator 2 have 12 salient pole teeth, and the outer rotor 3 has 8 salient pole teeth. It should be noted that the orientations mentioned here all refer to the radial direction. the

Coils are sheathed on the salient pole teeth inside the stator, and every four groups are connected in series to form a concentrated winding of one phase, thereby forming a concentrated inner winding 21 of three phases. Coils are sheathed on the salient pole teeth on the outer side of the stator, and every four groups are connected in series to form a concentrated winding of one phase, thereby forming a concentrated outer winding 22 of three phases. the

There is no electromagnetic coupling between the inner and outer motor subsystems of this multi-degree-of-freedom switched reluctance motor, and it can be controlled independently according to two ordinary switched reluctance motors. The controllable parameters are much more than ordinary switched reluctance motors, and it is very flexible. the

When both the inner and outer motor subsystems of the multi-degree-of-freedom switched reluctance motor are operated electrically, two sets of mechanical energy with different power, different speed, and different torque can be output to apply to different loads. the

When both the inner and outer motor subsystems of the multi-degree-of-freedom switched reluctance motor are in power generation operation, two sets of electric energy with different power, different frequency and different amplitude can be output. the

Even, the two internal and external motor subsystems of the multi-degree-of-freedom switched reluctance motor can perform power generation operation and the other electric operation to meet different needs. the

The novel multi-degree-of-freedom switched reluctance motor proposed by the utility model integrates two common switched reluctance motors in the space of one motor to provide two power flow paths. The flexibility of the system is greatly improved and the scope of application is expanded. the

Claims (2)

1. multivariant switched reluctance machines, it is characterized in that, this motor comprises internal rotor (1), around the stator (2) of described internal rotor (1), around the external rotor (3) of described stator (2), be provided with air gap between described two rotors and the stator (2);

Internal rotor (1) and external rotor (3) are provided with salient pole tooth without winding towards a side of stator (2), the inside and outside both sides of stator (2) are provided with the salient pole tooth, the inside and outside both sides of stator (2) are respectively arranged with inboard winding (21) and the outside winding (22) that is enclosed within on the salient pole tooth, and the yoke section of stator (2) is embedded with magnetism-isolating loop (23).

2. multivariant switched reluctance machines according to claim 1 is characterized in that, described inboard winding (21) and outside winding (22) are heterogeneous centralized armature winding.

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