Electric components and electrical equipment

Abstract

The present invention provides an electric component and electrical equipment, comprising a stator component and a rotor component. The stator component includes a stator core and a stator compensation component, which is disposed on the stator core. The rotor component is compatible with the stator component and includes a rotor core and a rotor compensation component, which is disposed on the rotor core. When the electric component is powered on and in operation, the stator compensation component and the rotor compensation component generate a periodically fluctuating electromagnetic torque through magnetic field interaction. This electromagnetic torque, also known as the compensation torque, is generated by the interaction between the spatially stationary bias magnetic field generated by the stator compensation component and the spatially rotating bias magnetic field generated by the rotor compensation component. This torque is compensated for through the structure of the electric component itself, avoiding torque imbalance in the compressor, reducing speed fluctuations in the compressor, and thereby reducing vibration and noise.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to an electric component and electrical equipment. Background Art

[0002] Currently, in related technologies, during the gas compression process, the gas resistance torque of the compressor changes periodically, causing the compressor load torque to fluctuate periodically. However, since the output torque of the compressor drive motor is a constant value, the compressor experiences torque imbalance, which in turn causes compressor speed fluctuations. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0004] To this end, a first aspect of the present invention provides an electric component.

[0005] A second aspect of the present invention provides an electrical device.

[0006] In view of this, a first aspect of the present invention provides an electric component, including a stator component and a rotor component, the stator component including a stator core and a stator compensation component, and the stator compensation component is arranged on the stator core; the rotor component is adapted to the stator component, the rotor component including a rotor core and a rotor compensation component, and the rotor compensation component is arranged on the rotor core; wherein, when the electric component is energized and running, the stator compensation component and the rotor compensation component generate a compensation torque through the action of a magnetic field.

[0007] In this technical solution, an air gap exists between the stator assembly and the rotor assembly. The stator assembly is provided with a stator core and a stator compensation assembly, while the rotor assembly is provided with a rotor core and a rotor compensation assembly. When the electric assembly is operating, the stator compensation assembly in the stator assembly and the rotor compensation assembly in the rotor assembly interact with each other to generate a compensating torque through the spatial static bias magnetic field generated by the stator compensation component and the spatial rotating bias magnetic field generated by the rotor compensation component. This allows torque compensation to be achieved through the structure of the electric assembly itself, allowing the output torque of the electric assembly to change in accordance with the compressor's gas compression process, thereby avoiding torque imbalance in the compressor, reducing compressor speed fluctuations, and thereby reducing vibration and noise. This can be particularly effective when the compressor is operating at low frequency and low speed, thereby reducing compressor speed fluctuations, vibration and noise, and improving the compressor's low-frequency performance.

[0008] In addition, single-cylinder compressors have the advantages of simple structure and low cost, and can be widely used in refrigeration equipment such as air conditioners and refrigerators. However, the load torque of single-cylinder compressors fluctuates greatly. If torque compensation is not performed, obvious speed fluctuations will occur, generating vibration and noise and reducing reliability, seriously affecting the low-frequency performance of the compressor. The method of the present application can compensate for the torque of the single-cylinder compressor, thereby better reducing speed fluctuations, reducing vibration and noise, and improving the low-frequency performance of the single-cylinder compressor.

[0009] Moreover, compared with the conventional method of generating compensation torque by regulating the motor current through electronic control, there is no need to introduce additional compensation current, nor will it cause the efficiency of the electric drive system to decrease, and the required torque compensation can be met.

[0010] Specifically, when the motor assembly is operating, the stator and rotor assemblies generate driving torque based on the operating principle of a permanent magnet synchronous motor with a pole-slot arrangement of P (P is the number of rotor poles of the motor assembly, specifically 2, 4, 6, 8, or 10) and Z (Z is the number of slots in the stator core of the motor assembly, specifically 3, 6, 9, or 12) slots, providing power for compressing gas in the compressor cylinder. Furthermore, the stator bias permanent magnets and / or the stator bias coils and rotor bias permanent magnets generate a compensation torque. For each rotation of the motor assembly, the fundamental frequency of the compensation torque is 1. The driving torque and the compensation torque are combined to form the motor assembly's total combined output torque, which is used to drive the compressor cylinder to achieve gas compression. When the driving torque is insufficient, the driving torque is combined with the inverse compensation torque to form the motor assembly's total combined output torque, providing positive compensation for the driving torque. When the driving torque is excessive and exceeds the required torque, the driving torque is combined with the inverse compensation torque to form the combined output torque, providing negative compensation for the driving torque.

[0011] Specifically, the stator compensating component forms a spatial static bias magnetic field distribution along the circumferential direction in the air gap, while the rotor compensating component forms a spatial rotating bias magnetic field distribution along the circumferential direction in the air gap and rotates synchronously with the rotor assembly. When the electric assembly is operating, the spatial rotating bias magnetic field distribution generated by the rotor compensating component interacts with the spatial static bias magnetic field distribution generated by the stator compensating component. Both have a pole pair number of 1, satisfying the condition of equal magnetic field pole pairs, thus forming a torque effect. Due to the relative motion between the rotating bias magnetic field distribution and the static bias magnetic field distribution, the torque generated is not a constant value, but an alternating torque with periodic changes in direction and magnitude. The alternating period is equal to the mechanical period of the compressor operation divided by the number of magnetic field pole pairs. Therefore, the number of cycles of the compensation torque is 1 for each rotation of the electric assembly.

[0012] The spatial arrangement of the stator and rotor assemblies can be flexible and varied, as long as they can rotate relative to each other. These arrangements include, but are not limited to, radial and axial magnetic flux configurations. Reference can be made to the spatial arrangement of the stator and rotor in a permanent magnet synchronous motor.

[0013] When the electric component is working, the stator compensation component in the stator component and the rotor compensation component in the rotor component will generate magnetic fields, and the compensation torque is generated by the interaction between the spatial static bias magnetic field generated by the stator compensation component and the spatial rotating bias magnetic field generated by the rotor compensation component.

[0014] In addition, in the above technical solution provided by the present invention, the electric component may also have the following additional technical features:

[0015] In one technical solution of the present invention, the stator compensation assembly includes at least two groups of stator compensation components, and the magnetic directions of at least two groups of stator compensation components are opposite; the rotor compensation assembly includes at least two groups of rotor compensation components, and the magnetic directions of at least two groups of rotor compensation components are opposite.

[0016] In this technical solution, the stator compensation assembly is composed of at least two groups of stator compensation assembly components, and the magnetic directions of the two groups of stator compensation components are opposite. Similarly, the rotor compensation assembly is also composed of at least two groups of rotor compensation components, and the magnetic pole directions are opposite. Such an arrangement can be achieved in the process of operation of the electric component. By setting at least two groups of stator compensation components and two groups of rotor compensation components, the electric component can generate a compensating torque by interacting with the spatial static bias magnetic field generated by the stator compensation component and the spatial rotating bias magnetic field generated by the rotor compensation component during the process of inhaling and exhausting gas, thereby compensating for the torque of the electric component.

[0017] Specifically, the magnetic directions of the two groups of stator compensation components are opposite. The magnetic direction of the two groups of stator compensation components is clockwise, that is, the group of stator compensation components is magnetized in the clockwise direction, and the magnetic direction of the other group of stator compensation components is counterclockwise, that is, the group of stator compensation components is magnetized in the counterclockwise direction.

[0018] Specifically, the magnetization direction of one group of stator compensation components in the two groups of stator compensation components is from the axis of the stator core to the outer wall of the stator core, and the magnetization direction of the other group of stator compensation components in the two groups of stator compensation components is from the outer wall of the stator core to the axis of the stator core.

[0019] Specifically, the rotor compensation assembly includes two groups of rotor compensation components, and the magnetic directions of the two groups of rotor compensation components are opposite. The magnetization direction of one group of rotor compensation components in the two groups of rotor compensation components is from the axis of the rotor core to the outer wall of the rotor core, and the magnetization direction of the other group of rotor compensation components in the two groups of rotor compensation components is from the outer wall of the rotor core to the axis of the rotor core.

[0020] In one technical solution of the present invention, a plurality of first slots are provided on the stator core, and the plurality of first slots are arranged along the circumference of the stator core; at least two groups of stator compensation components are permanent magnets, and are arranged in the plurality of first slots.

[0021] In this technical solution, the stator compensation component in the stator compensation assembly is a permanent magnet, and the magnetism of the permanent magnet itself can be used to generate a magnetic field without the need for additional current, and a compensation torque can be generated when the electric assembly is running. A plurality of first slots are provided in the stator core, and the stator compensation assembly can be installed in the slots provided along the circumference of the stator core, so that the stator core and the stator compensation assembly together constitute a stator assembly, and the manner of providing a plurality of first slots can realize the selection of the number of permanent magnets to be set in the first slots according to the size of the required compensation torque during the operation of the electric assembly.

[0022] Specifically, when the number of first slots is four, the four first slots are divided into two groups, with two first slots in each group, and there are two groups of stator compensation components, one group of stator compensation components in the two groups of stator compensation components is arranged in one group of first slots in the two groups of first slots, and the other group of stator compensation components in the two groups of stator compensation components is arranged in the other group of first slots in the two groups of first slots. The magnetic directions of the two groups of stator compensation components are opposite, thereby forming a stator compensation component with a pole pair number of 1 and a pole number of 2 on the stator assembly.

[0023] Specifically, when the number of first slots is six, the six first slots are divided into two groups, with three first slots in each group, and there are two groups of stator compensation components, one group of stator compensation components in the two groups of stator compensation components is arranged in one group of first slots in the two groups of first slots, and the other group of stator compensation components in the two groups of stator compensation components is arranged in the other group of first slots in the two groups of first slots. The magnetic directions of the two groups of stator compensation components are opposite, thereby forming a stator compensation component with a pole pair number of 1 and a pole number of 2 on the stator assembly.

[0024] Specifically, the permanent magnets in the stator compensation assembly can also be installed on the teeth of the stator core. The magnetization direction of one group of stator permanent magnets is from the axis of the stator core to the outer wall of the stator core, and the magnetization direction of the other group of permanent magnets in the two groups of permanent magnets is from the outer wall of the stator core to the axis of the stator core.

[0025] Specifically, the permanent magnets in the stator compensation assembly can also be installed in the tooth shoe of the stator core. The magnetization direction of one group of stator permanent magnets is from the axis of the stator core to the outer wall of the stator core, and the magnetization direction of the other group of permanent magnets in the two groups of permanent magnets is from the outer wall of the stator core to the axis of the stator core.

[0026] In one technical solution of the present invention, at least two groups of stator compensation components are coils wound around the stator core.

[0027] In this technical solution, the stator compensation component can also be a coil, which is wound around the stator core in a winding manner. The stator bias coil is equivalent to the stator bias permanent magnet in generating an air gap magnetic field. Moreover, by using the coil as the stator compensation component, a magnetic field can be generated by passing current into the coil. The magnitude and direction of the current in the coil can be adjusted, so that the current of the coil can be regulated, and the magnitude and direction of the magnetic field generated by the coil can be regulated.

[0028] Moreover, when current is passed through the coil, a magnetic field is generated. When the current is disconnected, no magnetic field is generated in the coil. Therefore, when the electric component needs to compensate for the torque, current is passed through the coil to compensate for the torque. When the torque compensation is not needed, the current in the coil is turned off, thereby realizing control over whether the torque compensation is needed.

[0029] Specifically, the coil can be wound around the yoke of the stator core, and a DC current is applied to the coil, with the current direction flowing in from the outside of the yoke and out from the inside. The current direction in the coils with opposite magnetic poles is flowing in from the inside of the yoke and out from the outside.

[0030] The coil can also be wound around the teeth of the stator core. The direction of the DC current applied to the coil is to flow into one side of the teeth of the stator core and out of the other side. The current directions of the coils with opposite magnetic poles are also opposite.

[0031] In one technical solution of the present invention, at least two groups of rotor compensation components are permanent magnets, which are attached to the outer surface of the rotor core and are arranged along the circumference of the rotor core.

[0032] In this technical solution, the rotor compensation component in the rotor compensation assembly is a permanent magnet, and the magnetism of the permanent magnet itself can be used to generate a magnetic field without the need for additional current. The compensation torque can be generated when the electric assembly is running, which can reduce the power consumption in the process of compensating the torque, thereby reducing the waste of energy in the process of compensating the torque. In addition, the use of permanent magnets as rotor compensation components does not require additional current or additional control circuits, and the permanent magnets also have the characteristics of flexible and diverse layout methods.

[0033] Specifically, the permanent magnets in the rotor compensation component can also be a built-in structure installed inside the rotor core, and the magnetization direction of one group of rotor permanent magnets is from the axis of the rotor core to the outer wall of the rotor core, and the magnetization direction of the other group of permanent magnets in the two groups of permanent magnets is from the outer wall of the rotor core to the axis of the rotor core.

[0034] In one technical solution of the present invention, the rotor assembly further includes rotor poles, which are attached to the outer surface of the rotor core or embedded in the rotor core.

[0035] In this technical solution, the rotor poles are arranged on the rotor core. The rotor poles can be attached to the outer surface of the rotor core or embedded in the rotor core. When the electric component is running, the rotor poles can cooperate with the stator component to realize the basic functions of the electric component during operation to ensure the stable operation of the electric component.

[0036] Furthermore, the rotor's main permanent magnets can be arranged in a variety of flexible ways, ensuring that a main magnetic field distribution with a fundamental pole number P is generated circumferentially within the air gap. These arrangements include, but are not limited to, a Halbach array structure, a surface-mount structure where the permanent magnets are mounted on the core surface, and an internal structure where the permanent magnets are mounted within the core. In other words, any permanent magnet arrangement used in conventional permanent magnet motors can be readily adapted and used.

[0037] In one technical solution of the present invention, at least two groups of rotor compensation components and the rotor poles are an integrated structure.

[0038] In this technical solution, the rotor compensation component and the rotor pole are set as an integrated structure, and the rotor pole and the rotor compensation component are combined and arranged together, so that the assembly process becomes simpler and the structure becomes more stable.

[0039] Specifically, the equivalent combination of the rotor poles and the rotor compensation components also forms a superimposed main magnetic field and a spatial rotating bias magnetic field distribution with a pole pair number of 1 (the number of poles is 2) in the air gap along the circumferential direction. In the arrangement, the magnetizing direction of the rotor poles and the rotor compensation components is from the axis of the rotor core to the outer wall of the rotor core, and the other set of magnetizing directions is from the outer wall of the rotor core to the axis of the rotor core.

[0040] Specifically, the rotor assembly contains only rotor poles, without rotor compensation components, and one side of the rotor pole is thicker than the other. The number of rotor poles, P, satisfies the specific mathematical relationship, P = 2. Because the number of rotor pole pairs is 1, the rotor poles also function as the aforementioned rotor compensation components, interacting with the spatially stationary bias magnetic field distribution generated by the stator compensation component to produce compensating torque.

[0041] In one technical solution of the present invention, the stator core includes a stator yoke and stator teeth, and the stator teeth are connected to the stator yoke; the stator assembly also includes a stator winding, and the stator winding is wound on the stator teeth.

[0042] In this technical solution, the stator core includes a stator yoke and stator teeth, with stator windings wound around the stator teeth, enabling the stator windings to be installed and fixed. Furthermore, the stator windings can mate with the rotor poles in the rotor assembly to achieve the basic functions of the electric component during operation, ensuring stable operation. Specifically, when the electric component is operating, the stator and rotor assemblies generate driving torque according to the operating principle of a permanent magnet synchronous motor with a P-pole, Z-slot configuration, providing power for compressing gas in the compressor cylinder.

[0043] In one technical solution of the present invention, the stator compensation assembly is arranged on the stator yoke.

[0044] In this technical solution, the stator compensation component is arranged on the stator yoke, which not only realizes the installation and fixation of the stator compensation component to ensure that the compensation torque can be generated during the operation of the electric component, but also the stator compensation component is arranged on the stator yoke instead of the stator teeth, which can reduce the impact on the stator tooth structure to ensure the strength of the stator teeth and avoid damage to the original structure of the stator teeth.

[0045] In one technical solution of the present invention, the stator compensation component is arranged between the stator teeth and the stator yoke, or is arranged on the stator teeth.

[0046] In this technical solution, the stator compensation component is arranged between the stator teeth and the stator yoke, and the stator compensation component can also be installed and fixed to ensure that a compensation torque can be generated during the operation of the electric component. Moreover, the stator compensation component is arranged between the stator teeth and the stator yoke, rather than on the stator teeth and the stator yoke, which can reduce the impact on the structure of the stator teeth and the stator yoke, thereby ensuring the strength of the stator teeth and the stator, and avoiding damage to the original structure of the stator teeth and the stator yoke.

[0047] In one technical solution of the present invention, the stator compensation assembly is arranged on the inner surface of the stator teeth.

[0048] In this technical solution, the stator compensation component is arranged on the inner surface of the stator teeth, which not only realizes the installation and fixation of the stator compensation component to ensure that the compensation torque can be generated during the operation of the electric component, but also the stator compensation component is arranged on the inner surface of the stator teeth instead of the stator teeth and yoke, which can reduce the impact on the stator structure to ensure the strength of the stator teeth and yoke and avoid damage to the original structure of the stator.

[0049] In one technical solution of the present invention, the electric component also includes a shell, a rotating shaft and a cylinder. The shell has a stator assembly arranged inside the shell; the rotating shaft is inserted into the rotor assembly after rotation; the cylinder includes a cylinder body and a piston, the cylinder body is connected to the shell, and the piston is connected to the rotating shaft.

[0050] In this technical solution, the stator assembly is arranged in the shell, and the rotating shaft is inserted into the rotor assembly, so that when the electric assembly rotates, the rotor assembly is driven to rotate by the rotating shaft, and then the rotor compensation component in the rotor assembly interacts with the stator compensation component arranged in the shell to generate a compensation torque. The stator assembly and the rotor assembly generate torque according to the principle of permanent magnet synchronous motor, and thus can provide initial power for the compressor cylinder to compress gas.

[0051] In one technical solution of the present invention, the number of poles of the rotor compensation component is 2; the number of poles of the stator compensation component is 2.

[0052] In this technical solution, the stator bias permanent magnets and / or stator bias coils form a spatially stationary bias magnetic field distribution with a pole pair number of 1 (or 2) along the circumferential direction in the air gap. The rotor bias permanent magnets form a spatially rotating bias magnetic field distribution with a pole pair number of 1 (or 2) along the circumferential direction in the air gap. This spatially rotating bias magnetic field distribution rotates synchronously with the rotor assembly.

[0053] In one technical solution of the present invention, the electric component is a motor or a compressor.

[0054] In this technical solution, the electric component is a motor or a compressor, so that the motor or the compressor also has the function of torque compensation.

[0055] A second aspect of the present invention provides an electrical device, comprising the above-mentioned electric component. Therefore, the electrical device has all the beneficial effects of any of the above-mentioned technical solutions.

[0056] In this technical solution, there is an air gap between the stator assembly and the rotor assembly, the stator assembly is provided with a stator core and a stator compensation assembly, and the rotor assembly is provided with a rotor core and a rotor compensation assembly. When the electric assembly is working, the stator compensation assembly in the stator assembly and the rotor compensation assembly in the rotor assembly interact with each other through the spatial static bias magnetic field generated by the stator compensation component and the spatial rotating bias magnetic field generated by the rotor compensation component to generate a compensation torque, thereby achieving torque compensation through the structure of the electric assembly itself, so that the output torque of the electric assembly can change with the compressor compressing gas process, avoiding torque imbalance in the compressor, reducing the speed fluctuation of the compressor, and thus reducing vibration and noise. Especially when the compressor is working at low frequency and low speed, the speed fluctuation of the compressor can be better reduced, vibration and noise can be reduced, and the low-frequency performance of the compressor can be improved.

[0057] In addition, single-cylinder compressors have the advantages of simple structure and low cost, and can be widely used in refrigeration equipment such as air conditioners and refrigerators. However, the load torque of single-cylinder compressors fluctuates greatly. If torque compensation is not performed, obvious speed fluctuations will occur, generating vibration and noise and reducing reliability, seriously affecting the low-frequency performance of the compressor. The method of the present application can compensate for the torque of the single-cylinder compressor, thereby better reducing speed fluctuations, reducing vibration and noise, and improving the low-frequency performance of the single-cylinder compressor.

[0058] Moreover, compared with the conventional method of generating compensation torque by regulating the motor current through electronic control, there is no need to introduce additional compensation current, nor will it cause the efficiency of the electric drive system to decrease, and the required torque compensation can be met.

[0059] Specifically, when the motor assembly is operating, the stator and rotor assemblies generate driving torque based on the operating principle of a permanent magnet synchronous motor with a pole-slot arrangement of P (P is the number of rotor poles of the motor assembly, specifically 2, 4, 6, 8, or 10) and Z (Z is the number of slots in the stator core of the motor assembly, specifically 3, 6, 9, or 12) slots, providing power for compressing gas in the compressor cylinder. Furthermore, the stator bias permanent magnets and / or the stator bias coils and rotor bias permanent magnets generate a compensating torque. For each rotation of the motor assembly, the fundamental frequency of the compensating torque is 1. The driving torque and the compensating torque are combined to form the motor assembly's total combined output torque, which is used to drive the compressor cylinder to achieve gas compression. When the driving torque is insufficient, the driving torque is combined with the inverse compensating torque to form the motor assembly's total combined output torque, providing positive compensation for the driving torque. When the driving torque is excessive, exceeding the required torque, the driving torque is combined with the inverse compensating torque to form the combined output torque, providing negative compensation for the driving torque.

[0060] Specifically, the stator compensating component forms a spatial static bias magnetic field distribution along the circumferential direction in the air gap, while the rotor compensating component forms a spatial rotating bias magnetic field distribution along the circumferential direction in the air gap and rotates synchronously with the rotor assembly. When the electric assembly is operating, the spatial rotating bias magnetic field distribution generated by the rotor compensating component interacts with the spatial static bias magnetic field distribution generated by the stator compensating component. Both have a pole pair number of 1, satisfying the condition of equal magnetic field pole pairs, thus forming a torque effect. Due to the relative motion between the rotating bias magnetic field distribution and the static bias magnetic field distribution, the torque generated is not a constant value, but an alternating torque with periodic changes in direction and magnitude. The alternating period is equal to the mechanical period of the compressor operation divided by the number of magnetic field pole pairs. Therefore, the number of cycles of the compensation torque is 1 for each rotation of the electric assembly.

[0061] The spatial arrangement of the stator and rotor assemblies can be flexible and varied, as long as they can rotate relative to each other. These arrangements include, but are not limited to, radial and axial magnetic flux configurations. Reference can be made to the spatial arrangement of the stator and rotor in a permanent magnet synchronous motor.

[0062] When the electric component is working, the stator compensation component in the stator component and the rotor compensation component in the rotor component will generate magnetic fields, and the compensation torque is generated by the interaction between the spatial static bias magnetic field generated by the stator compensation component and the spatial rotating bias magnetic field generated by the rotor compensation component.

[0063] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0065] Figure 1 A schematic diagram of an electric component with a torque compensation function according to an embodiment of the present invention is shown;

[0066] Figure 2 A schematic diagram showing the relationship between the driving torque, the compensation torque and the resultant output torque according to an embodiment of the present invention is shown;

[0067] Figure 3 FIG2 shows a schematic diagram of a formation mechanism of a compensation torque according to an embodiment of the present invention;

[0068] Figure 4 One of the schematic diagrams of a stator assembly in an electric assembly according to one embodiment of the present invention is shown;

[0069] Figure 5 One of the schematic diagrams of a stator assembly in an electric assembly according to one embodiment of the present invention is shown;

[0070] Figure 6 One of the schematic diagrams of a stator assembly in an electric assembly according to one embodiment of the present invention is shown;

[0071] Figure 7 One of the schematic diagrams of a stator assembly in an electric assembly according to one embodiment of the present invention is shown;

[0072] Figure 8 One of the schematic diagrams of a rotor assembly in an electric assembly according to one embodiment of the present invention is shown;

[0073] Figure 9One of the schematic diagrams of a rotor assembly in an electric assembly according to one embodiment of the present invention is shown;

[0074] Figure 10 FIG1 shows one of the schematic diagrams of air gap magnetic field distribution generated by the combined arrangement of rotor poles and rotor compensation components in an electric component according to an embodiment of the present invention;

[0075] Figure 11 FIG1 shows one of the schematic diagrams of the air gap magnetic field distribution generated in the air gap by the rotor magnetic poles alone in the electric component according to one embodiment of the present invention;

[0076] Figure 12 FIG1 shows one of the schematic diagrams of the air gap magnetic field distribution generated in the air gap by the rotor compensation component alone in the electric component according to one embodiment of the present invention;

[0077] Figure 13 One of the schematic diagrams of a rotor assembly in an electric motor assembly according to an embodiment of the present invention is shown.

[0078] in, Figures 1 to 13 The corresponding relationship between the reference numerals and component names is as follows:

[0079] 10 stator assembly, 108 stator winding, 110 stator core, 112 stator yoke, 114 stator teeth, 120 stator compensation component, 122 coil, 20 rotor assembly, 202 rotor core, 204 rotor poles, 206 rotor compensation component. DETAILED DESCRIPTION

[0080] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0081] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0082] Refer to the following Figures 1 to 13 Electrical components and electrical devices according to some embodiments of the present invention are described.

[0083] Example 1:

[0084] The present invention provides an electric component, including a stator component 10 and a rotor component 20, wherein the stator component 10 includes a stator core 110 and a stator compensation component, and the stator compensation component is arranged on the stator core 110; the rotor component 20 is adapted to the stator component 10, and the rotor component 20 includes a rotor core 202 and a rotor compensation component, and the rotor compensation component is arranged on the rotor core 202; wherein, when the electric component is running and energized, the stator compensation component and the rotor compensation component generate a compensation torque through the action of a magnetic field.

[0085] like Figure 1 、 Figure 2 and Figure 3 As shown, an air gap exists between the stator assembly 10 and the rotor assembly 20. The stator assembly 10 is provided with a stator core 110 and a stator compensation assembly, while the rotor assembly 20 is provided with a rotor core and a rotor compensation assembly. When the electric assembly is operating, the stator compensation assembly in the stator assembly 10 and the rotor compensation assembly in the rotor assembly 20 generate a compensating torque due to the interaction between the spatially static bias magnetic field generated by the stator compensation component 120 and the spatially rotating bias magnetic field generated by the rotor compensation component 206. This achieves torque compensation through the structure of the electric assembly itself, allowing the output torque of the electric assembly to change with the compressor's gas compression process, avoiding torque imbalance in the compressor and reducing compressor speed fluctuations, thereby reducing vibration and noise. This can be particularly effective when the compressor is operating at low frequency and low speed, effectively reducing compressor speed fluctuations, vibration, and noise, thereby improving the compressor's low-frequency performance.

[0086] In addition, single-cylinder compressors have the advantages of simple structure and low cost, and can be widely used in refrigeration equipment such as air conditioners and refrigerators. However, the load torque of single-cylinder compressors fluctuates greatly. If torque compensation is not performed, obvious speed fluctuations will occur, generating vibration and noise and reducing reliability, seriously affecting the low-frequency performance of the compressor. The method of the present application can compensate for the torque of the single-cylinder compressor, thereby better reducing speed fluctuations, reducing vibration and noise, and improving the low-frequency performance of the single-cylinder compressor.

[0087] Moreover, compared with the conventional method of generating compensation torque by regulating the motor current through electronic control, there is no need to introduce additional compensation current, nor will it cause the efficiency of the electric drive system to decrease, and the required torque compensation can be met.

[0088] Specifically, when the electric assembly is operating, the stator assembly 10 and rotor assembly 20, on the one hand, generate driving torque according to the operating principle of a permanent magnet synchronous motor with a pole-slot combination of P (P is the number of rotor poles of the electric assembly, which can be 2, 4, 6, 8, or 10, etc.) and Z (Z is the number of slots in the stator core 110 of the electric assembly, which can be 3, 6, 9, or 12, etc.), providing power for the compressor cylinder to compress gas. On the other hand, the stator bias permanent magnet or the stator bias coil and rotor bias permanent magnet generate compensation torque. For each rotation of the electric assembly, the fundamental wave period of the compensation torque is 1. The driving torque and the compensation torque are superimposed to form the total combined output torque of the electric assembly, which is used to drive the compressor cylinder to achieve the gas compression function. When the driving torque is insufficient, the driving torque is superimposed on the same-direction compensation torque to form the total synthetic output torque of the electric component, that is, positive compensation is performed on the driving torque; and when the driving torque is too large and exceeds the required torque, the driving torque is superimposed on the reverse compensation torque to form the synthetic output torque, that is, negative compensation of the driving torque can be achieved.

[0089] Specifically, the stator compensating component 120 forms a spatial static bias magnetic field distribution along the circumferential direction in the air gap, and the rotor compensating component 206 forms a spatial rotating bias magnetic field distribution along the circumferential direction in the air gap and rotates synchronously with the rotor assembly 20. When the electric assembly is operating, the spatial rotating bias magnetic field distribution generated by the rotor compensating component 206 interacts with the spatial static bias magnetic field distribution generated by the stator compensating component 120. Both have a pole pair number of 1, satisfying the condition of equal magnetic field pole pairs, thereby generating a torque effect. Due to the relative motion between the rotating bias magnetic field distribution and the static bias magnetic field distribution, the torque generated is not a constant value, but an alternating torque with periodic changes in direction and magnitude. The alternating period is equal to the mechanical period of the compressor operation divided by the number of magnetic field pole pairs. Therefore, the number of cycles of the compensation torque is 1 for each rotation of the electric assembly.

[0090] The spatial arrangement of the stator assembly 10 and the rotor assembly 20 is flexible and diverse, as long as the stator assembly 10 and the rotor assembly 20 can rotate relative to each other. Spatial arrangements of the stator assembly 10 and the rotor assembly 20 include, but are not limited to, radial flux structures and axial flux structures, and can refer to the spatial arrangement of the stator and rotor of a permanent magnet synchronous motor.

[0091] When the electric component is working, the stator compensation component in the stator component and the rotor compensation component in the rotor component will generate magnetic fields, and the compensation torque is generated by the interaction between the spatial static bias magnetic field generated by the stator compensation component 120 and the spatial rotating bias magnetic field generated by the rotor compensation component 206.

[0092] exist Figure 1 In the figure, the arrow represents the magnetization direction. Figure 2 and Figure 3The mid-circle angle is the angle corresponding to the position of the rotor. Figure 2 、 Figure 3 N·m represents the unit of torque, compensation torque, driving torque and synthetic output torque.

[0093] Example 2:

[0094] This embodiment provides an electric component. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0095] The present invention provides an electric component, wherein the stator compensation component includes at least two groups of stator compensation components 120, and the magnetic directions of the at least two groups of stator compensation components 120 are opposite; the rotor compensation component includes at least two groups of rotor compensation components 206, and the magnetic directions of the at least two groups of rotor compensation components 206 are opposite.

[0096] In this technical solution, the stator compensation assembly is composed of at least two groups of stator compensation assembly components, and the magnetic directions of the two groups of stator compensation components 120 are opposite. Similarly, the rotor compensation assembly is also composed of at least two groups of rotor compensation components 206, and the magnetic pole directions are opposite. Such an arrangement can be achieved in that, during the operation of the electric component, by setting at least two groups of stator compensation components 120 and two groups of rotor compensation components, when the electric component inhales and exhausts gas, the spatial static bias magnetic field generated by the stator compensation component 120 interacts with the spatial rotating bias magnetic field generated by the rotor compensation component 206 to generate a compensation torque, thereby compensating the torque of the electric component.

[0097] Specifically, the magnetic directions of the two groups of stator compensation components 120 are opposite. The magnetic direction of the two groups of stator compensation components 120 is clockwise, that is, the group of stator compensation components 120 is magnetized in the clockwise direction, and the magnetic direction of the other group of stator compensation components 120 is counterclockwise, that is, the group of stator compensation components 120 is magnetized in the counterclockwise direction.

[0098] Specifically, the magnetization direction of one set of stator compensation components 120 in the two sets of stator compensation components 120 may be from the axis of the stator core 110 to the outer wall of the stator core 110 , and the magnetization direction of the other set of stator compensation components 120 in the two sets of stator compensation components 120 may be from the outer wall of the stator core 110 to the axis of the stator core 110 .

[0099] Specifically, the rotor compensation assembly includes two groups of rotor compensation components 206. The magnetic directions of the two groups of rotor compensation components 206 are opposite. The magnetization direction of one group of rotor compensation components 206 is from the axis of the rotor core 202 to the outer wall of the rotor core 202, and the magnetization direction of the other group of rotor compensation components 206 is from the outer wall of the rotor core 202 to the axis of the rotor core 202.

[0100] Example 3:

[0101] This embodiment provides an electric component. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0102] The present invention provides an electric component, wherein a stator core 110 is provided with a plurality of first slots, and the plurality of first slots are arranged along the circumference of the stator core 110; at least two groups of stator compensation components 120 are permanent magnets, and are arranged in the plurality of first slots.

[0103] like Figure 4 and Figure 5 As shown, the stator compensation component 120 in the stator compensation assembly is a permanent magnet, and the magnetism of the permanent magnet itself can be used to generate a magnetic field without the need for additional current application, and a compensation torque can be generated when the electric assembly is running. A plurality of first slots are provided in the stator core 110, and the stator compensation assembly can be installed in the slots arranged along the circumference of the stator core 110, so that the stator core 110 and the stator compensation assembly together constitute the stator assembly 10, and the manner of setting a plurality of first slots can realize the selection of the number of permanent magnets to be set in the first slots according to the size of the required compensation torque during the operation of the electric assembly.

[0104] Specifically, when the number of first slots is four, the four first slots are divided into two groups, with two first slots in each group, and there are two groups of stator compensation components 120, one group of stator compensation components 120 in the two groups of stator compensation components 120 is arranged in one group of first slots in the two groups of first slots, and the other group of stator compensation components 120 in the two groups of stator compensation components 120 is arranged in the other group of first slots in the two groups of first slots. The magnetic directions of the two groups of stator compensation components 120 are opposite, thereby forming a stator compensation component with a pole pair number of 1 and a pole number of 2 on the stator assembly 10.

[0105] Specifically, when the number of first slots is six, the six first slots are divided into two groups, each group has three first slots, and there are two groups of stator compensation components 120, one group of stator compensation components 120 in the two groups of stator compensation components 120 is arranged in one group of first slots in the two groups of first slots, and the other group of stator compensation components 120 in the two groups of stator compensation components 120 is arranged in the other group of first slots in the two groups of first slots. The magnetic directions of the two groups of stator compensation components 120 are opposite, thereby forming a stator compensation component with a pole pair number of 1 and a pole number of 2 on the stator assembly 10.

[0106] Specifically, the permanent magnets in the stator compensation assembly can also be installed on the teeth of the stator core 110. The magnetization direction of one group of stator permanent magnets is from the axis of the stator core 110 to the outer wall of the stator core 110, and the magnetization direction of the other group of permanent magnets in the two groups of permanent magnets is from the outer wall of the stator core 110 to the axis of the stator core 110.

[0107] Specifically, the permanent magnets in the stator compensation assembly can also be installed in the tooth shoe portion of the stator core 110. The magnetization direction of one group of stator permanent magnets is from the axis of the stator core 110 to the outer wall of the stator core 110, and the magnetization direction of the other group of permanent magnets in the two groups of permanent magnets is from the outer wall of the stator core 110 to the axis of the stator core 110.

[0108] Figure 4 、 Figure 5 The arrow shown in the figure indicates the magnetization direction.

[0109] Example 4:

[0110] This embodiment provides an electric component. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0111] The present invention provides an electric component, wherein at least two groups of stator compensation components 120 are coils 122 wound around the stator core 110 .

[0112] like Figure 6 and Figure 7 As shown, in this technical solution, the stator compensation component 120 can also be a coil 122, which is wound on the stator core 110 in a winding manner. The stator bias coil is equivalent to the stator bias permanent magnet in generating an air gap magnetic field. Moreover, by using the coil 122 as the stator compensation component 120, it is only necessary to pass current into the coil 122 to generate a magnetic field. The magnitude and direction of the current in the coil 122 can be adjusted, so that the current of the coil 122 can be regulated, and then the magnitude and direction of the magnetic field generated by the coil 122 can be regulated.

[0113] Moreover, when current is passed through the coil 122, a magnetic field is generated. When the current is disconnected, no magnetic field is generated in the coil 122. Therefore, when the electric component needs to compensate for the torque, current is passed through the coil 122 to compensate for the torque. When the torque compensation is not required, the current in the coil 122 is turned off, thereby realizing control over whether the torque compensation is needed.

[0114] Specifically, the coil 122 can be wound around the yoke of the stator core 110, and a DC current is applied to the coil 122, with the current direction flowing in from the outside of the yoke and out from the inside. The current direction in the coil 122 with opposite magnetic poles is flowing in from the inside of the yoke and out from the outside.

[0115] The coil 122 can also be wound around the teeth of the stator core 110. The direction of the DC current applied to the coil 122 is to flow into one side of the teeth of the stator core 110 and out of the other side. The current directions of the coils 122 with opposite magnetic poles are also opposite.

[0116] Embodiment 5:

[0117] This embodiment provides an electric component. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0118] The present invention provides an electric component, wherein at least two groups of rotor compensation components 206 are permanent magnets, which are attached to the outer surface of the rotor core 202 and are arranged along the circumference of the rotor core 202 .

[0119] like Figure 1 As shown, the rotor compensation component 206 in the rotor compensation assembly is a permanent magnet, and the magnetism of the permanent magnet itself can be used to generate a magnetic field without the need for additional current, and a compensation torque can be generated when the electric component is running, which can reduce the power consumption in the process of compensating the torque, thereby reducing the waste of energy in the process of compensating the torque. In addition, the use of permanent magnets as the rotor compensation component 206 does not require additional current or additional control circuits, and the permanent magnets also have the characteristics of flexible and diverse arrangements.

[0120] Specifically, the permanent magnets in the rotor compensation component 206 can also be a built-in structure installed inside the rotor core 202, and the magnetization direction of one group of rotor permanent magnets is from the axis of the rotor core 202 to the outer wall of the rotor core 202, and the magnetization direction of the other group of permanent magnets in the two groups of permanent magnets is from the outer wall of the rotor core 202 to the axis of the rotor core 202.

[0121] Example 6:

[0122] This embodiment provides an electric component. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0123] The present invention provides an electric component, wherein the rotor component 20 further includes a rotor pole 204 . The rotor pole 204 is attached to the outer surface of the rotor core 202 or embedded in the rotor core 202 .

[0124] like Figure 8 As shown, the rotor pole 204 is set on the rotor core. The rotor pole 204 can be attached to the outer surface of the rotor core 202 or embedded in the rotor core 202. When the electric component is running, the rotor pole 204 can cooperate with the stator component 10 to realize the basic functions of the electric component during operation to ensure the stable operation of the electric component.

[0125] Furthermore, the rotor's main permanent magnets can be arranged in a variety of flexible ways, ensuring that a main magnetic field distribution with a fundamental pole number P is generated circumferentially within the air gap. These arrangements include, but are not limited to, a Halbach array structure, a surface-mount structure where the permanent magnets are mounted on the core surface, and an internal structure where the permanent magnets are mounted within the core. In other words, any permanent magnet arrangement used in conventional permanent magnet motors can be readily adapted and used.

[0126] Figure 8 The arrow in the middle indicates the magnetization direction.

[0127] Embodiment seven:

[0128] This embodiment provides an electric component. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0129] The present invention provides an electric assembly, wherein at least two sets of rotor compensation components 206 and rotor poles 204 are integrated into one structure.

[0130] like Figure 9 、 Figure 10 、 Figure 11 、 Figure 12 and Figure 13 As shown, the rotor compensation component 206 and the rotor pole 204 are set as an integrated structure, and the rotor pole 204 and the rotor compensation component 206 are combined and arranged together, so that the assembly process becomes simpler and the structure becomes more stable.

[0131] Specifically, the equivalent combination of the rotor poles 204 and the rotor compensation component 206 also forms a superimposed main magnetic field and a spatial rotating bias magnetic field distribution with a pole pair number of (1 pole number is 2) in the air gap along the circumferential direction. In the arrangement, the magnetization direction of the rotor poles 204 and the rotor compensation component 206 is from the axis of the rotor core 202 to the outer wall of the rotor core 202, and the other set of magnetization directions is from the outer wall of the rotor core 202 to the axis of the rotor core 202.

[0132] Specifically, the rotor assembly 20 contains only rotor poles 204, without the rotor compensating element 206. One side of the rotor poles is thicker than the other. The number of poles P of the rotor poles 204 satisfies the specific mathematical relationship P = 2. Because the number of pole pairs of the rotor poles 204 is 1, the rotor poles 204 also function as the aforementioned rotor compensating element 206, interacting with the spatially stationary bias magnetic field distribution generated by the stator compensating element 120 to generate compensating torque.

[0133] The distribution trend of the magnetic flux density of the air gap magnetic field generated by the rotor pole 204 in the air gap is as follows: Figure 10 shown.

[0134] If the rotor poles 204 and the rotor compensation component 206 are not arranged together, the distribution trend of the magnetic flux density of the air gap magnetic field generated in the air gap by the rotor poles 204 alone is as follows: Figure 11 shown.

[0135] If the rotor poles 204 and the rotor compensation component 206 are not arranged together, the distribution trend of the magnetic flux density of the air gap magnetic field generated in the air gap by the rotor compensation component 206 alone is as follows: Figure 12 shown.

[0136] The effect of the superposition of the distribution of the magnetic flux density of the air gap magnetic field generated by the rotor pole 204 alone and the rotor compensation component 206 alone in the air gap is the same as that of the rotor compensation component 206. Figure 9 The distribution of the magnetic flux density of the air gap magnetic field generated by the combined arrangement shown is consistent.

[0137] exist Figure 10 、 Figure 11 and Figure 12 In the figure, the horizontal axis represents the circumferential angle, the vertical axis represents the magnetic flux density, and T represents the unit of magnetic flux density, Tesla.

[0138] Embodiment 8:

[0139] This embodiment provides an electric component. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0140] The present invention provides an electric component, wherein the stator core 110 includes a stator yoke 112 and stator teeth 114 , and the stator teeth 114 are connected to the stator yoke 112 ; the stator component 10 further includes a stator winding 108 , and the stator winding 108 is wound on the stator teeth 114 .

[0141] like Figure 1As shown, stator core 110 includes a stator yoke 112 and stator teeth 114. Stator windings 108 are wound around stator teeth 114, achieving the installation and fixation of stator windings 108. Stator windings 108 can also cooperate with rotor poles 204 in rotor assembly 20 to achieve the basic functions of the electric assembly during operation and ensure stable operation of the electric assembly. Specifically, when the electric assembly is operating, stator assembly 10 and rotor assembly 20 generate driving torque according to the operating principle of a permanent magnet synchronous motor with a pole-slot arrangement of P poles and Z slots, providing power for the compressor cylinder to compress gas.

[0142] Embodiment 9:

[0143] This embodiment provides an electric component. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0144] The present invention provides an electric component, wherein the stator compensation component is arranged on the stator yoke 112 .

[0145] like Figure 1 As shown, the stator compensation component is arranged on the stator yoke 112, which can not only realize the installation and fixation of the stator compensation component 120 to ensure that the compensation torque can be generated during the operation of the electric component, but also the stator compensation component is arranged on the stator yoke 112 instead of the stator teeth 114, which can reduce the impact on the structure of the stator teeth 114, thereby ensuring the strength of the stator teeth 114 and avoiding damage to the original structure of the stator teeth 114.

[0146] Embodiment 10:

[0147] This embodiment provides an electric component. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0148] The present invention provides an electric component, wherein the stator compensation component is disposed between the stator teeth 114 and the stator yoke 112 .

[0149] like Figure 4 As shown, the stator compensation component 120 is arranged between the stator teeth 114 and the stator yoke 112, and the stator compensation component 120 can also be installed and fixed to ensure that a compensation torque can be generated during the operation of the electric component. Moreover, the stator compensation component is arranged between the stator teeth 114 and the stator yoke 112, rather than on the stator teeth 114 and the stator yoke 112, so as to reduce the impact on the structure of the stator teeth 114 and the stator yoke 112, so as to ensure the strength of the stator teeth 114 and the stator, and avoid damage to the original structure of the stator teeth 114 and the stator yoke 112.

[0150] Example 11:

[0151] This embodiment provides an electric component. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0152] The present invention provides an electric component, wherein the stator compensation component is disposed on the inner surface of the stator teeth 114 .

[0153] like Figure 5 As shown, the stator compensation component is arranged on the inner surface of the stator teeth 114, which not only realizes the installation and fixation of the stator compensation component 120 to ensure that the compensation torque can be generated during the operation of the electric component, but also the stator compensation component is arranged on the inner surface of the stator teeth 114 instead of on the stator teeth 114 and the yoke 112, which can reduce the impact on the structure of the stator 114, thereby ensuring the strength of the stator teeth 114 and the yoke, and avoiding damage to the original structure of the stator 114.

[0154] Example 12:

[0155] This embodiment provides an electric component. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0156] The present invention provides an electric component, which also includes a shell, a rotating shaft and a cylinder. The shell has a stator assembly 10 arranged inside the shell; the rotating shaft is inserted into the rotor assembly 20 after rotation; the cylinder includes a cylinder body and a piston, the cylinder body is connected to the shell, and the piston is connected to the rotating shaft.

[0157] The stator assembly 10 is arranged in the shell, and the rotating shaft is inserted into the rotor assembly 20, so that when the electric assembly rotates, the rotor assembly 20 is driven to rotate by the rotating shaft, thereby realizing that the rotor compensation component 206 in the rotor assembly 20 interacts with the stator compensation component 120 arranged in the shell to generate a compensation torque. The stator assembly 10 and the rotor assembly 20 generate torque according to the principle of permanent magnet synchronous motor, and thus can provide initial power for the compressor cylinder to compress gas.

[0158] Example 13:

[0159] This embodiment provides an electric component. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0160] The present invention provides an electric component, wherein the number of poles of the rotor compensation component is 2; the number of poles of the stator compensation component is 2.

[0161] The stator bias permanent magnet or the stator bias coil forms a spatial static bias magnetic field distribution with a pole pair number of 1 and a pole number of 2 in the air gap along the circumferential direction. The rotor bias permanent magnet forms a spatial rotating bias magnetic field distribution with a pole pair number of 1 and a pole number of 2 in the air gap along the circumferential direction. The spatial rotating bias magnetic field distribution rotates synchronously with the rotor assembly 20.

[0162] Example 14:

[0163] This embodiment provides an electric component. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0164] The present invention provides an electric component, which is a motor or a compressor.

[0165] The electric component is a motor or a compressor, so that the motor or the compressor also has a torque compensation function.

[0166] Embodiment 15:

[0167] The present invention provides an electrical device, comprising the above-mentioned electric component, and therefore, the electrical device has all the beneficial effects of any of the above-mentioned technical solutions.

[0168] There is an air gap between the stator assembly 10 and the rotor assembly 20. The stator assembly 10 is provided with a stator core 110 and a stator compensation assembly, and the rotor assembly 20 is provided with a rotor core and a rotor compensation assembly. When the electric assembly is working, the stator compensation assembly in the stator assembly 10 and the rotor compensation assembly in the rotor assembly 20 interact with the spatial static bias magnetic field generated by the stator compensation component 120 and the spatial rotating bias magnetic field generated by the rotor compensation component 206 to generate a compensation torque, thereby achieving torque compensation through the structure of the electric assembly itself, so that the output torque of the electric assembly can change with the compressor compression process, avoiding torque imbalance in the compressor, reducing the speed fluctuation of the compressor, and thus reducing vibration and noise. Especially when the compressor is working at low frequency and low speed, the speed fluctuation of the compressor can be better reduced, vibration and noise can be reduced, and the low-frequency performance of the compressor can be improved.

[0169] In addition, single-cylinder compressors have the advantages of simple structure and low cost, and can be widely used in refrigeration equipment such as air conditioners and refrigerators. However, the load torque of single-cylinder compressors fluctuates greatly. If torque compensation is not performed, obvious speed fluctuations will occur, generating vibration and noise and reducing reliability, seriously affecting the low-frequency performance of the compressor. The method of the present application can compensate for the torque of the single-cylinder compressor, thereby better reducing speed fluctuations, reducing vibration and noise, and improving the low-frequency performance of the single-cylinder compressor.

[0170] Moreover, compared with the conventional method of generating compensation torque by regulating the motor current through electronic control, there is no need to introduce additional compensation current, nor will it cause the efficiency of the electric drive system to decrease, and the required torque compensation can be met.

[0171] Specifically, when the electric assembly is operating, the stator assembly 10 and rotor assembly 20, on the one hand, generate driving torque according to the operating principle of a permanent magnet synchronous motor with a pole-slot combination of P (P is the number of poles of the electric assembly, which can be 2, 4, 6, 8, or 10, etc.) and Z (Z is the number of slots in the stator core 110 of the electric assembly, which can be 3, 6, 9, or 12, etc.), providing power for the compressor cylinder to compress gas. On the other hand, the stator bias permanent magnet or the stator bias coil and rotor bias permanent magnet generate compensation torque. For each rotation of the electric assembly, the fundamental wave period of the compensation torque is 1. The driving torque and the compensation torque are superimposed to form the total combined output torque of the electric assembly, which is used to drive the compressor cylinder to achieve the gas compression function. When the driving torque is insufficient, the driving torque is superimposed on the same-direction compensation torque to form the total synthetic output torque of the electric component, that is, positive compensation is performed on the driving torque. When the driving torque is too large and exceeds the required torque, the driving torque is superimposed on the reverse compensation torque to form the synthetic output torque, that is, negative compensation of the driving torque can be achieved.

[0172] Specifically, the stator compensating component 120 forms a spatial static bias magnetic field distribution along the circumferential direction in the air gap, and the rotor compensating component 206 forms a spatial rotating bias magnetic field distribution along the circumferential direction in the air gap and rotates synchronously with the rotor assembly 20. When the electric assembly is operating, the spatial rotating bias magnetic field distribution generated by the rotor compensating component 206 interacts with the spatial static bias magnetic field distribution generated by the stator compensating component 120. Both have a pole pair number of 1, satisfying the condition of equal magnetic field pole pairs, thereby generating a torque effect. Due to the relative motion between the rotating bias magnetic field distribution and the static bias magnetic field distribution, the torque generated is not a constant value, but an alternating torque with periodic changes in direction and magnitude. The alternating period is equal to the mechanical period of the compressor operation divided by the number of magnetic field pole pairs. Therefore, the number of cycles of the compensation torque is 1 for each rotation of the electric assembly.

[0173] The spatial arrangement of the stator assembly 10 and the rotor assembly 20 is flexible and diverse, as long as the stator assembly 10 and the rotor assembly 20 can rotate relative to each other. Spatial arrangements of the stator assembly 10 and the rotor assembly 20 include, but are not limited to, radial flux structures and axial flux structures, and can refer to the spatial arrangement of the stator and rotor of a permanent magnet synchronous motor.

[0174] When the electric component is working, the stator compensation component in the stator component and the rotor compensation component in the rotor component will generate magnetic fields, and the compensation torque is generated by the interaction between the spatial static bias magnetic field generated by the stator compensation component 120 and the spatial rotating bias magnetic field generated by the rotor compensation component 206.

[0175] In the claims, specification and drawings of the present invention, the term "plurality" refers to two or more. Unless otherwise expressly defined, the orientation or positional relationship indicated by the terms "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the purpose of more conveniently describing the present invention and making the description process simpler. It is not intended to indicate or imply that the device or element referred to must have the specific orientation described, be constructed and operated in a specific orientation. Therefore, these descriptions cannot be understood as limiting the present invention. The terms "connect", "install", "fix" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection between multiple objects, or a detachable connection between multiple objects, or an integral connection; it can be a direct connection between multiple objects, or an indirect connection between multiple objects through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood based on the specific circumstances of the above data.

[0176] In the claims, specification, and drawings of the present invention, the terms "one embodiment," "some embodiments," "a specific embodiment," and the like mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In the claims, specification, and drawings of the present invention, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0177] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An electric component, characterized in that: include: A stator assembly, the stator assembly comprising a stator core and a stator compensation assembly, the stator compensation assembly being arranged on the stator core; A rotor assembly, the rotor assembly being adapted to the stator assembly, the rotor assembly comprising a rotor core and a rotor compensation assembly, the rotor compensation assembly being disposed on the rotor core; Wherein, when the electric component is powered on and running, the stator compensation component and the rotor compensation component generate compensation torque through the action of magnetic field; The stator compensation assembly includes at least two groups of stator compensation components, and the magnetic directions of the at least two groups of stator compensation components are opposite; The rotor compensation assembly comprises at least two groups of rotor compensation components, and the magnetic directions of the at least two groups of rotor compensation components are opposite; The stator core is provided with a plurality of first slots, and the plurality of first slots are arranged along the circumference of the stator core; The at least two groups of stator compensation components are permanent magnets and are arranged in the plurality of first slots; The magnetization direction of one of the two groups of stator compensation components is from the axis of the stator core to the outer wall of the stator core, and the magnetization direction of the other group of the two groups of stator compensation components is from the outer wall of the stator core to the axis of the stator core; The magnetization direction of one group of the two groups of rotor compensation components is from the axis of the rotor core to the outer wall of the rotor core, and the magnetization direction of the other group of the two groups of rotor compensation components is from the outer wall of the rotor core to the axis of the rotor core.

2. The electric component according to claim 1, characterized in that The at least two groups of rotor compensation components are permanent magnets, which are attached to the outer surface of the rotor core and are arranged along the circumference of the rotor core.

3. The electric component according to claim 2, characterized in that The rotor assembly further comprises: The rotor magnetic poles are attached to the outer surface of the rotor core or embedded in the rotor core.

4. The electric component according to claim 3, characterized in that The at least two groups of rotor compensation components and the rotor pole are an integrated structure.

5. The electric component according to any one of claims 1 to 4, characterized in that: The stator core includes a stator yoke and stator teeth, and the stator teeth are connected to the stator yoke; The stator assembly further includes a stator winding wound around the stator teeth.

6. The electric component according to claim 5, characterized in that The stator compensation component is arranged on the stator yoke.

7. The electric assembly according to claim 5, characterized in that The stator compensation component is arranged between the stator teeth and the stator yoke, or is arranged on the stator teeth.

8. The electric component according to claim 5, characterized in that The stator compensation component is arranged on the inner surface of the stator teeth.

9. The electric component according to any one of claims 1 to 4, characterized in that: Also includes: a housing, wherein the stator assembly is disposed within the housing; a rotating shaft, the rotating shaft being inserted into the rotor assembly; The cylinder comprises a cylinder body and a piston, wherein the cylinder body is connected to the housing, and the piston is connected to the rotating shaft.

10. The electric component according to any one of claims 1 to 4, characterized in that: The number of poles of the rotor compensation component is 2; The number of poles of the stator compensation component is 2.

11. The electric component according to any one of claims 1 to 4, characterized in that: The electric component is a motor or a compressor.

12. An electrical device, characterized in that: The invention comprises the electric component according to any one of claims 1 to 11.

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