WO2023164884A1

WO2023164884A1 - Synchronous reluctance tangential induction coil rotor

Info

Publication number: WO2023164884A1
Application number: PCT/CN2022/079041
Authority: WO
Inventors: 罗灿
Original assignee: 罗灿
Priority date: 2022-03-03
Filing date: 2022-03-03
Publication date: 2023-09-07

Abstract

A synchronous reluctance tangential induction coil rotor, which is composed of a rotor core and a tangential induction coil, and can serve as a component for forming a synchronous reluctance motor together with a stator, an electrode, a supporting component, a casing, etc. The rotor core is formed by stacking axially bent steel sheets insulated from one another, the part in which the steel sheets are arranged radially being a direct-axis part, and the part in which the steel sheets are arranged tangentially being an quadrature-axis part. A radial induction coil is composed of an outer conducting bar, a front end ring and a rear end ring, and surrounds the direct-axis part of the rotor core, and a tangential induction coil is composed of an outer conducting bar, a front end ring, an inner conducting bar and a rear end ring, and surrounds the quadrature-axis part of the rotor core. Both the radial induction coil and the tangential induction coil can allow an induction current to form a current loop.

Description

Synchronous Reluctance Tangential Induction Coil Rotor

technical field

The invention relates to an axial lamination rotor of a synchronous reluctance motor. Specifically, a tangential induction coil consisting of an outer guide bar, a front end ring, an inner guide bar and a rear end ring is arranged around the cross axis of the rotor core. This axially laminated rotor is a synchronous reluctance tangential induction coil rotor.

Background technique

The main components of the motor include stators, rotors, poles, supporting components and casings. The rotor is a key component, improving the structure and operation mechanism of the rotor can improve the performance of the motor. The axial laminated rotor of the traditional synchronous reluctance motor, the rotor core is stacked with mutually insulated curved steel sheets parallel to the axial direction, the part of the steel sheets arranged radially is the straight axis, and the steel sheets are arranged tangentially Part is the cross axis. In order to improve the starting characteristics of the synchronous reluctance motor, guide bars, front-end rings and rear-end rings are generally arranged on the rotor. The radial coil formed by them surrounds the direct axis part of the rotor core. Under the action of the rotating stator magnetic field, the radial coil The induction generates a radial induced magnetic field, which interacts with the stator magnetic field to provide the rotor with a starting torque, which is not large. The invention proposes to improve the structure of the axially laminated rotor, and the outer guide bar, the front end ring, the inner guide bar and the rear end ring are arranged on the rotor, and the tangential induction coil formed by them surrounds the cross-axis part of the rotor core; at the same time, the outer The radial induction coil composed of guide bar, front end ring and rear end ring surrounds the direct axis part of the rotor core. Such a rotor structure innovates the operating mechanism and can generate two kinds of induced magnetic fields to provide greater starting torque to the rotor and improve the starting performance of the synchronous reluctance motor. The alternating current used by the synchronous reluctance motor is a current in which the current potential of each phase changes sinusoidally over time, including sinusoidal alternating current, near-sinusoidal alternating current, and simulated sinusoidal alternating current generated by an inverter, all of which are mature technologies. The control of alternating current adopts mature technology.

The invention proposes a synchronous reluctance tangential induction coil rotor, improves the synchronous reluctance motor by improving the rotor structure, and improves the starting performance of the motor. The motor industry needs the synchronous reluctance tangential induction coil rotor of the present invention to improve synchronous reluctance motors.

Contents of the invention

The synchronous reluctance tangential induction coil rotor of the present invention is composed of a rotor iron core and a tangential induction coil; it can be used as a component to form a synchronous reluctance motor with stators, electrodes, supporting components, casings and other components. The stator, poles, supporting parts and casing adopt mature technology, and the synchronous reluctance motor composed of mature technology adopts mature technology. The present invention is characterized in that:

The rotor core is composed of rotor shaft, steel sheet and insulation layer, manufactured by mature technology, stacked by mutually insulated axially bent steel sheets. The rotor shaft can be a solid structure or a non-solid structure. The steel sheet is made of high magnetic permeability material, and the insulating layer is stacked alternately along the axial direction. The steel sheets arranged radially are the straight axis part, and the steel sheets arranged tangentially are the cross axis part.

The tangential induction coil is composed of an outer guide bar, a front ring, an inner guide bar and a rear end ring, all of which are made of conductive materials. The outer guide bars are distributed axially and embedded under the outer surface of the rotor iron core, and the inner guide bars are distributed axially and embedded under the inner surface of the rotor iron core. Drill holes under the surface of the rotor core to embed the outer and inner guide bars. The front-end ring short-circuits the front ends of each guide bar in front of the rotor iron core, and the rear-end ring short-circuits the rear ends of each guide bar behind the rotor iron core. The shorts are interconnected for electrical conduction. The coil composed of the outer guide bar, the front ring and the rear end ring surrounds the direct axis of the rotor core, which is called the radial induction coil; the coil composed of the outer guide bar, the front ring, the inner guide bar and the rear end ring alternates around the rotor core The shaft part is called the tangential induction coil, and both the radial induction coil and the tangential induction coil can be used for induction current to form a current loop.

The present invention forms a multi-phase AC synchronous reluctance motor as a rotor, a multi-phase AC stator and the like, as shown in FIG. 1 , which is a cross-sectional view of a three-phase AC synchronous reluctance motor. In the figure, the front end ring and the rear end ring are not cut, and the electrodes, supporting parts and casing are not drawn. In the figure, 1 is the stator yoke, 2 is the stator pole, and 3 is the armature winding. 1, 2 and 3 are common The three-phase AC two-pair magnetic pole pair stator is marked. The braces on the outside of the stator core indicate the phase number of the armature winding. The armature winding and phase number adopt mature technology. 4 is the steel sheet, 5 is the insulating layer, and 6 is the Outer guide bar, 7 is an inner guide bar, and 8 is a rotor shaft. The present invention forms a two-phase AC synchronous reluctance motor with components such as a two-phase AC stator. Referring to FIG. The supporting parts and the casing are not shown. In the figure, 1 is the stator yoke, 2 is the stator pole, and 3 is the armature winding. 1, 2 and 3 jointly mark the two-phase AC two-pair magnetic pole pair stator, and the stator pole The phase number marked on the armature winding around the pole, the armature winding and the phase number adopt mature technology, 4 is the steel sheet, 5 is the insulation layer, 6 is the outer guide bar, 7 is the inner guide bar, 8 is the rotor shaft. This specification and the accompanying drawings only describe the basic shape and mutual relationship of the rotor core, outer guide bar, inner guide bar, front end ring, rear end ring and rotor shaft, and do not describe the specific size parameters of these parts. The specific size parameters of these parts should be optimized according to the specific needs of the motor, and these optimized designs use mature technology.

The traditional rotor adopts the axial lamination rotor core, only the guide bars located on the outer side of the rotor core, and no inner guide bars. The guide bar, front end ring and rear end ring form the direct axis part of the radial coil around the rotor core; see Figure 4. The synchronous reluctance tangential induction coil rotor adopts the axial lamination rotor core, which has both outer guide bars and inner guide bars. The outer guide bar, front end ring, inner guide bar and rear end ring form a tangential induction coil around the rotor core. cross-axis part. The synchronous reluctance tangential induction coil rotor innovates the structure of the rotor.

The traditional rotor only has radial induction coils. When the stator is supplied with alternating current, the stator magnetic field enters the rotor along the radial direction to form a radial magnetic flux. Rotating the stator magnetic field causes the radial magnetic flux to change, and the changed radial magnetic flux passes through the radial induction coil. The coil generates an induced current, and a radially induced magnetic field is generated in the radially induced coil, and the radially induced magnetic field interacts with the stator magnetic field to cause the rotor to rotate. Synchronous reluctance motor composed of tangential induction coil rotor, when the stator is supplied with alternating current, the stator magnetic field first enters the rotor along the radial direction to form a radial magnetic flux, and then circulates along the steel sheet to form a tangential magnetic flux, and the rotating stator magnetic field causes Both the radial magnetic flux and the tangential magnetic flux are changing, and the changing radial magnetic flux passes through the radial induction coil to generate an induced current, forming the first radial induction magnetic field in the radial induction coil; at the same time, the changing The tangential magnetic flux passes through the tangential induction coil to generate an induced current around the quadrature axis, and the tangential induction magnetic field generated in the tangential induction coil gathers to form a second radial induction magnetic field; these two radial induction magnetic fields Interacts with the stator magnetic field, causing the rotor to turn. Compared with the traditional radial coil synchronous reluctance rotor, the synchronous reluctance tangential induction coil rotor innovates the operating mechanism and improves the motor efficiency. There is no axial lamination synchronous reluctance rotor with the same structure before the present invention.

The synchronous reluctance tangential induction coil rotor is beneficial in that: the structure of the axial laminated rotor is improved, the operating mechanism is innovated, and the starting performance and efficiency of the synchronous reluctance motor can be improved.

The rotor, rotor core, high magnetic flux material, aggregation, steel sheet, insulation layer, direct axis, quadrature axis, radial flux, tangential flux, radial induced magnetic field, stator, pole columns, stator pole pairs The number and the stator magnetic field are mature technologies. The guide bar, front end ring, rear end ring, conductive material, armature winding, radial coil, induction current, short circuit and current loop are all mature technologies.

Description of drawings

FIG. 1 is one of the cross-sectional views of a three-phase AC synchronous reluctance motor with two pairs of magnetic poles, which is also a schematic diagram of Embodiment 1. In the figure, 1 is the stator yoke, 2 is the stator pole, and 3 is the armature winding, there are (+a, -c, +b, -a, +c, -b, +a', -c', +b ', -a', +c' and -b') are twelve groups in total, 4 is the steel sheet, 5 is the insulating layer, 6 is the outer guide bar, 7 is the inner guide bar, and 8 is the rotor shaft.

2 is a cross-sectional view of a two-phase AC synchronous reluctance motor with two pairs of magnetic poles, which is also a schematic diagram of Embodiment 2. In the figure, 1 is the stator yoke, 2 is the stator pole, and 3 is the armature winding, including (+a, +b, -a, -b, +a', +b', +c' and -b') A total of eight groups, 4 for the steel sheet, 5 for the insulation layer, 6 for the outer guide bar, 7 for the inner guide bar, 8 for the rotor shaft.

Fig. 3 is the second cross-sectional view of a three-phase AC synchronous reluctance motor with three pairs of magnetic poles, which is also a schematic diagram of embodiment 3. In the figure, 1 is the stator yoke, 2 is the stator pole, and 3 is the armature winding, there are (+a,-c,+b,-a,+c,-b,+a′,-c′,+b ', -a', +c', -b', +a", -c", +b", -a", +c" and -b"), a total of eighteen groups, 4 for steel sheet, 5 for Insulation layer, 6 is the outer guide bar, 7 is the inner guide bar, and 8 is the rotor shaft.

Fig. 4 is a sectional view of a traditional three-phase AC synchronous reluctance motor with two pairs of magnetic poles. In the figure, 1 is the stator yoke, 2 is the stator pole, and 3 is the armature winding, there are (+a, -c, +b, -a, +c, -b, +a', -c', +b ', -a', +c' and -b') are twelve groups in total, 4 is a steel sheet, 5 is a guide bar, 6 is an insulating layer, and 7 is a rotor shaft.

In each figure, the electrodes, supporting parts, casing, etc. are not shown, and the front end ring and the rear end ring are not shown. Each component only shows the mutual relationship, and does not reflect the actual size. The quantity of outer guide strips and inner guide strips is for reference only, and the actual quantity is optimized according to actual needs, and mature technology is adopted for optimized settings.

Detailed ways

Embodiment 1: The synchronous reluctance tangential induction coil rotor is composed of the rotor core and the tangential induction coil; as a component and a three-phase AC stator, electrodes, support components and casings and other components to form a three-phase AC with two pairs of magnetic poles Synchronous reluctance motor, see Figure 1.

The rotor core is composed of rotor shaft, steel sheet and insulation layer, manufactured by mature technology, stacked by mutually insulated axially bent steel sheets. The rotor shaft can be a solid structure or a non-solid structure. The steel sheet is made of high magnetic permeability material, and the insulating layer is stacked alternately along the axial direction. The steel sheets arranged radially are the straight axis part, and the steel sheets arranged tangentially are the cross axis part. In this embodiment, the rotor core has four direct axes and four orthogonal axes.

Figure 1 is a cross-sectional view of the motor, the front end ring and the rear end ring are not cut out, the electrodes, supporting parts and casing are not drawn, in the figure 1 is the stator yoke, 2 is the stator pole, 3 is the armature winding , 1, 2 and 3 jointly mark the two pairs of magnetic pole pairs of the three-phase alternating current stator. The curly brackets outside the stator core indicate the phase number of the armature winding. The armature winding and phase number adopt mature technology. 4 is steel sheet. 5 is an insulating layer, 6 is an outer guide bar, 7 is an inner guide bar, 8 is a rotor shaft, and the rotor shaft adopts a non-solid structure of high-strength steel.

The operating mechanism of the motor in this embodiment is: when the stator is supplied with three-phase alternating current, a rotating stator magnetic field is formed, with two pairs of magnetic poles. The stator magnetic field first enters the rotor in the radial direction to form a radial magnetic flux, and then circulates along the steel sheet. The tangential magnetic flux is formed, and the rotation of the stator magnetic field causes both the radial magnetic flux and the tangential magnetic flux to change, and the changing radial magnetic flux passes through the radial induction coil to generate an induced current, forming the first type in the radial induction coil Radial induction magnetic field; at the same time, the changing tangential magnetic flux passes through the tangential induction coil to generate an induced current around the quadrature axis, and the tangential induction magnetic field generated in the tangential induction coil gathers to form a second radial Induced magnetic fields; these two radially induced magnetic fields interact with the stator magnetic field, causing the rotor to turn.

Embodiment 2: The synchronous reluctance tangential induction coil rotor is composed of the rotor core and the tangential induction coil; as a component, it forms two pairs of magnetic pole pairs with the two-phase AC stator, electrodes, support components and casing. Synchronous reluctance motor, see Figure 2.

Figure 2 is a cross-sectional view of the motor. The front end ring and the rear end ring are not cut in the figure, and the electrodes, supporting parts and casing are not drawn. In the figure, 1 is the stator yoke, 2 is the stator pole, and 3 is the armature winding. , 1, 2 and 3 jointly mark the two-phase AC two-pair magnetic pole pair stator, and the phase number of the armature winding around the pole is marked on the stator pole. The armature winding and phase number adopt mature technology, and 4 is Steel sheet, 5 is an insulating layer, 6 is an outer guide bar, 7 is an inner guide bar, 8 is a rotor shaft, and the rotor shaft adopts a non-solid structure of high-strength steel.

The operating mechanism of the motor in this embodiment is: when the stator is supplied with two-phase alternating current, a rotating stator magnetic field is formed, with two pairs of magnetic poles. The stator magnetic field first enters the rotor in the radial direction to form a radial magnetic flux, and then circulates along the steel sheet. The tangential magnetic flux is formed, and the rotation of the stator magnetic field causes both the radial magnetic flux and the tangential magnetic flux to change, and the changing radial magnetic flux passes through the radial induction coil to generate an induced current, forming the first type in the radial induction coil Radial induction magnetic field; at the same time, the changing tangential magnetic flux passes through the tangential induction coil to generate an induced current around the quadrature axis, and the tangential induction magnetic field generated in the tangential induction coil gathers to form a second radial Induced magnetic fields; these two radially induced magnetic fields interact with the stator magnetic field, causing the rotor to turn.

Embodiment 3: The synchronous reluctance tangential induction coil rotor is composed of the rotor core and the tangential induction coil; as a component and a three-phase AC stator, electrodes, support components, and a casing to form three pairs of magnetic pole pairs for a three-phase AC Synchronous reluctance motor, see Figure 3.

The rotor core is composed of rotor shaft, steel sheet and insulation layer, manufactured by mature technology, stacked by mutually insulated axially bent steel sheets. The rotor shaft can be a solid structure or a non-solid structure. The steel sheet is made of high magnetic permeability material, and the insulating layer is stacked alternately along the axial direction. The steel sheets arranged radially are the straight axis part, and the steel sheets arranged tangentially are the cross axis part. In this embodiment, the rotor core has six direct axes and six orthogonal axes.

Figure 3 is a sectional view of the motor, in which the front end ring and the rear end ring are not cut, and the electrodes, supporting parts and casing are not drawn. In the figure, 1 is the stator yoke, 2 is the stator pole, and 3 is the armature winding , 1, 2 and 3 jointly mark the two pairs of magnetic pole pairs of the three-phase alternating current stator. The curly brackets outside the stator core indicate the phase number of the armature winding. The armature winding and phase number adopt mature technology. 4 is steel sheet. 5 is an insulating layer, 6 is an outer guide bar, 7 is an inner guide bar, 8 is a rotor shaft, and the rotor shaft adopts a non-solid structure of high-strength steel.

The operating mechanism of the motor in this embodiment is: when the stator is supplied with three-phase alternating current, a rotating stator magnetic field is formed, with three pairs of magnetic poles. The stator magnetic field first enters the rotor in the radial direction to form a radial magnetic flux, and then circulates along the steel sheet. The tangential magnetic flux is formed, and the rotation of the stator magnetic field causes both the radial magnetic flux and the tangential magnetic flux to change, and the changing radial magnetic flux passes through the radial induction coil to generate an induced current, forming the first type in the radial induction coil Radial induction magnetic field; at the same time, the changing tangential magnetic flux passes through the tangential induction coil to generate an induced current around the tangential part, and the tangential induction magnetic field generated in the tangential induction coil gathers to form a second radial Induced magnetic fields; these two radially induced magnetic fields interact with the stator magnetic field, causing the rotor to turn.

Each of the

above embodiments

1 and 2 has described the synchronous reluctance tangential induction coil rotor with four quadrature axes and four direct axes, which is also a rotor with two pairs of pole pairs; embodiment 3 has described the rotor with six quadrature axes Six direct-axis synchronous reluctance tangential induction coil rotors, which is also a rotor with three pairs of pole pairs. Synchronous reluctance tangential induction coil rotors with a greater number of pole pairs also belong to the protection scope of the present invention, and these rotors with a greater number of pole pairs can be deduced by using public knowledge.

The above describes the basic principles, main features and advantages of the present invention. Those skilled in the industry should understand that the present invention is not limited to the above-mentioned embodiments, and all changes and improvements of the present invention fall within the scope of the claimed invention without departing from the spirit and scope of the present invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims

The synchronous reluctance tangential induction coil rotor is composed of the rotor core and the tangential induction coil; it can be used as a component to form a motor with stators, electrodes, supporting components, casings and other components, and is characterized in that:

The rotor core is composed of rotor shaft, steel sheet and insulating layer. It is manufactured by mature technology. It is stacked by mutually insulated axially bent steel sheets. The steel sheets arranged radially are the straight shaft part, and the steel sheets are arranged tangentially. is the intersection part;

The tangential induction coil is composed of outer guide bars, front-end rings, inner guide bars and rear end rings. The outer guide bars are embedded in the outer surface of the rotor core along the axial direction, and the inner guide bars are embedded in the rotor iron core along the axial distribution. Under the surface, the front end ring short-circuits the front end of each guide bar in front of the rotor core, and the rear end ring short-circuits the rear end of each guide bar behind the rotor core; the coil composed of the outer guide bar, front end ring and rear end ring surrounds the rotor The direct axis part of the iron core is called the radial induction coil; the coil composed of the outer guide bar, the front end ring, the inner guide bar and the rear end ring surrounds the cross axis part of the rotor core, which is called the tangential induction coil, and the radial induction coil and the Tangential induction coils can be used for induction current to form a current loop.
The synchronous reluctance tangential induction coil rotor as claimed in claim 1 forms a motor with the stator, electrodes, supporting parts, casing and other components, and the operating mechanism of the motor: the stator magnetic field first enters the rotor along the radial direction to form a radial magnetic flux, Then flow along the steel sheet to form a tangential magnetic flux. Rotating the stator magnetic field causes both the radial magnetic flux and the tangential magnetic flux to change. The changing radial magnetic flux passes through the radial induction coil to generate an induced current, which is induced in the radial direction The first radial induction magnetic field is formed in the coil; at the same time, the changing tangential magnetic flux passes through the tangential induction coil to generate an induced current around the tangential part, and the tangential induction magnetic field generated in the tangential induction coil gathers A second radially induced magnetic field is formed; these two radially induced magnetic fields interact with the stator magnetic field, causing the rotor to rotate.