Controller stator integrated assembly and BLDC motor

Abstract

The controller stator integrated assembly comprises a stator assembly and a frequency conversion controller connected with the stator assembly, the frequency conversion controller comprises a circuit board, and the circuit board is provided with a power supply and a plurality of electronic elements; wherein the circuit board is installed at one end of the stator assembly, and the center of the circuit board is provided with a shaft hole for installing one end penetrating through a motor output shaft; the variable-frequency controller forms an AC-DC power supply through an electronic element, and inputs alternating current to the variable-frequency controller to drive the motor to operate; the variable frequency controller is electrically connected with a winding of the stator assembly; the motor can directly replace an AC induction motor, a user does not need to make any change from the structure and a power supply, the heat dissipation effect is good, the structure is compact, the cost is low, and the motor is especially suitable for being used as a driving motor structure of an air conditioner fan or a small-power motor in the medical industry.

Description

Technical Field

[0001] The utility model belongs to the field of drive structures, and particularly relates to a controller stator integrated component. The utility model also relates to a BLDC motor to which the controller stator integrated component is applied. Background Art

[0002] The BLDC (Brushless Direct Current) motor is widely used to replace the AC induction motor. The motor body and the variable frequency controller of the conventional BLDC motor are two independent structural units. During the production and manufacturing process, both are assembled separately and then installed and connected by screws. The motor controller of this structural type usually uses an AC input voltage. The variable frequency controller converts the alternating current into direct current through a rectification and filtering circuit, and then inversely converts it into a variable AC power supply through PWM to drive the motor to operate. However, for the BLDC motor of this structure, the variable frequency controller needs to be independently installed at the rear end of the motor, which increases the overall installation length of the motor. At the same time, the end where the variable frequency controller is located cannot have a shaft output, resulting in the inability to directly replace the AC induction motor in some occasions where space is limited and shaft output is required at both ends.

[0003] In the BLDC motor structure scheme, there is also a method of integrally installing the motor controller in the plastic-encapsulated stator and connecting it to the stator three-phase windings by welding. Since the whole motor is fully sealed, the power module on the controller needs to dissipate heat through the motor end cover, and the internal space is limited. Larger components such as rectification and filtering devices cannot be placed on the controller. Therefore, the controller of the BLDC motor of this structure can only be powered by direct current, and then inversely converted into variable alternating current to drive the motor; although its controller is installed in the stator assembly, it can only use direct current power input and cannot input alternating current power. In this way, it cannot directly replace the AC induction motor in actual applications and requires an additional AC-DC power supply, which is greatly restricted in actual applications.

[0004] Therefore, the applicant hopes to seek a technical solution to solve the above technical problems. Summary of the Invention

[0005] In view of this, the purpose of the utility model is to provide a controller stator integrated component and a BLDC motor, which can directly replace the AC induction motor, and users do not need to make any changes in terms of structure and power supply. It has good heat dissipation effect, compact structure and low cost, and is particularly suitable as the drive motor structure of an air-conditioning fan or a small-power motor in the medical industry.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A controller stator integrated component, comprising a stator component and a variable frequency controller connected to the stator component, the variable frequency controller comprising a circuit board, on which a power supply and a number of electronic components are provided; wherein,

[0008] The circuit board is mounted at one end of the stator component, and a shaft hole is provided at the center of the circuit board for mounting one end of the motor output shaft passing through;

[0009] The variable frequency controller forms an AC-to-DC power supply through the electronic components, and AC power is input to the variable frequency controller to drive the motor to operate;

[0010] The variable frequency controller is electrically connected to the windings of the stator component.

[0011] Preferably, the stator component includes a housing, a stator core and windings, wherein the stator core is fixedly installed on the inner circumference of the housing, and the windings are sleeved on the stator core through an insulating skeleton; the circuit board is located non-sealed on the inner circumference of the housing.

[0012] Preferably, the insulating skeleton includes an upper insulating skeleton unit and a lower insulating skeleton unit respectively installed at the upper and lower ends of the stator core; wherein, the circuit board is fixedly installed on the upper insulating skeleton unit or the lower insulating skeleton unit.

[0013] Preferably, the circuit board is fixedly installed on the inner wall of the housing and is located at one end of the stator core.

[0014] Preferably, a number of spaced-apart card interfaces are provided on the outer periphery of the circuit board, and a number of card protruding posts are provided on the corresponding insulating skeleton unit or the housing, and each card interface is clamped with its corresponding card protruding post.

[0015] Preferably, the housing includes a cylindrical barrel with open ends at both ends, and a number of heat dissipation windows are provided on the cylindrical barrel.

[0016] Preferably, the circuit board is circular in shape.

[0017] Preferably, the electronic components include a bus capacitor, a rectification module, a filtering module, a power module, an MCU module and peripheral circuit components; wherein, the AC-to-DC power supply is formed by the bus capacitor, the rectification module and the filtering module.

[0018] Preferably, a BLDC motor adopts the controller stator integrated component as described above; a rotor component is provided on the inner circumference of the stator component, and the rotor component is integrally installed and connected to the motor output shaft; both ends of the motor output shaft extend outward along both ends of the stator component.

[0019] Preferably, one end of the motor output shaft close to the frequency conversion controller extends through the shaft hole and is installed and connected to the motor end cover.

[0020] The utility model integrally installs the frequency conversion controller in an open manner (i.e., non-sealed) on the stator assembly. At the same time, the frequency conversion controller directly sets an AC-DC power supply. By inputting alternating current, the driving operation of the motor can be directly realized. In practical applications, it can directly replace the AC induction motor. Users do not need to make any changes to the structure and power supply. It has good heat dissipation effect, compact structure and low cost, and is especially suitable as the driving motor structure of an air-conditioning fan or a small-power motor in the medical industry. Description of the Drawings

[0021] Figure 1 is a schematic structural diagram of the controller stator integrated assembly under the specific embodiment of the utility model;

[0022] Figure 2 is to Figure 1 a schematic structural diagram after rotating a certain angle;

[0023] Figure 3 is Figure 1 a schematic diagram of one end face structure of;

[0024] Figure 4 is Figure 1 a schematic exploded view of. Specific Embodiment

[0025] An embodiment of the utility model discloses a controller stator integrated assembly, which includes a stator assembly and a frequency conversion controller connected to the stator assembly. The frequency conversion controller includes a circuit board, and a power supply and several electronic components are arranged on the circuit board; wherein, the circuit board is installed at one end of the stator assembly, and a shaft hole is provided at the center of the circuit board for installing one end of the motor output shaft passing through; the frequency conversion controller forms an AC-DC power supply through the electronic components, and inputs alternating current to the frequency conversion controller to drive the motor to operate; the frequency conversion controller is electrically connected to the winding of the stator assembly.

[0026] An embodiment of the utility model discloses a BLDC motor, which adopts the controller stator integrated assembly as described above; a rotor assembly is arranged on the inner periphery of the stator assembly, and the rotor assembly is integrally installed and connected to the motor output shaft; both ends of the motor output shaft extend outward along both ends of the stator assembly.

[0027] To enable those skilled in the art to better understand the technical solutions in the present utility model, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0028] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a controller stator integrated component includes a stator component 1 and a variable frequency controller 2 connected to the stator component 1. The variable frequency controller 2 includes a circuit board 21, and a power supply and several electronic components are provided on the circuit board 21. Among them, the circuit board 21 is installed at one end of the stator component 1, and a shaft hole 22 is provided at the center of the circuit board 21 for installing one end of a motor output shaft (a well-known structure, not shown in the figure). The variable frequency controller 2 forms an AC-to-DC power supply through electronic components, inputs alternating current to the variable frequency controller to drive the motor to operate. The variable frequency controller 2 is electrically connected to the winding 11 of the stator component 1.

[0029] Preferably, in this embodiment, the stator component 1 includes a housing 12, a stator core 13, and a winding 11. Among them, the stator core 13 is fixedly installed on the inner circumference of the housing 12, and the winding 11 is sleeved on the stator core 13 through an insulating skeleton. The circuit board 21 is located non-sealedly on the inner circumference of the housing 12. Further preferably, the insulating skeleton includes an upper insulating skeleton unit 14a and a lower insulating skeleton unit 14b respectively installed at the upper and lower ends of the stator core 13. Among them, for the sake of facilitating convenient and compact installation, in this embodiment, the circuit board 21 is fixedly installed on the upper insulating skeleton unit 14a or the lower insulating skeleton unit 14b, and is installed and supported through the insulating skeleton unit. Specifically preferably, in this embodiment, several card interfaces 23 are provided at intervals on the outer peripheral portion of the circuit board 21 (the number of card interfaces can be specifically selected according to actual needs, and it is recommended to be at least more than 2. 12 card interfaces 23 are shown in the figure), and several card-connecting convex columns 15 (12 card-connecting convex columns 15 are shown in the figure) are provided on the corresponding insulating skeleton unit, and each card interface 23 is card-connected to its corresponding card-connecting convex column 15.

[0030] It should be noted that in other embodiments, the circuit board 21 can also be fixedly installed on the inner wall of the housing 12 (specifically, for example, the circuit board 21 can be directly press-fitted on the inner wall of the housing 12, or bosses can be provided on the inner wall of the housing 12, and a number of card columns corresponding to the card interfaces can be provided on the boss surfaces. Of course, other fixed installation methods can also be used, and this embodiment does not make a unique limitation). And the circuit board 21 is located at one end of the stator core 13, and this embodiment does not make specific restrictions on it.

[0031] Preferably, in order to achieve a more compact and better heat dissipation installation effect, in this embodiment, the housing 12 includes a cylindrical barrel with both ends open, and a number of heat dissipation windows 12a are provided on the cylindrical barrel; the circuit board 21 is circular in shape, and the electronic components include a bus capacitor b, a rectification module c, a filtering module d, a power module e, an MCU module f and peripheral circuit components. Among them, the AC-DC power supply (i.e., the AC-DC power supply) described in this embodiment is formed by the bus capacitor b, the rectification module c and the filtering module d; since the variable frequency controller 2 and the stator assembly 1 in this embodiment are of an open integrated installation structure, the power module e of the variable frequency controller 2 can dissipate heat through natural air convection without relying on the motor end cover, so that the various electronic components of the variable frequency controller 2 can be directly integrated on the circuit board 21, and the whole machine can input AC power to work normally. In order to further improve the heat dissipation effect, in specific implementation, an external fan can also be used to further achieve efficient heat dissipation of the power module.

[0032] This embodiment also proposes a BLDC motor, which adopts the controller stator integrated component as described above; a rotor assembly is provided on the inner circumference of the stator assembly 1, and the rotor assembly is integrally installed and connected with the motor output shaft; both ends of the motor output shaft extend outward along both ends of the stator assembly; preferably, in this embodiment, one end of the motor output shaft close to the variable frequency controller 2 extends through the shaft hole 22 and is installed and connected with the motor end cover.

[0033] In this embodiment, the variable frequency controller 2 is integrally installed on the insulation skeleton unit of the stator assembly 1 in an open manner. At the same time, the AC-DC power supply (formed after the action of the bus capacitor b, the rectification module c and the filtering module d) is directly provided on the circuit board 21 of the variable frequency controller 2. Inputting alternating current can directly drive and operate the motor. In practical applications, it can directly replace the AC induction motor, and users do not need to make any changes to the structure and power supply. It has good heat dissipation effect, compact structure and low cost, and is especially suitable as the drive motor structure of air-conditioning fans or small-power motors in the medical industry.

[0034] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-mentioned exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

[0035] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A controller-stator integrated assembly, comprising a stator assembly and a variable frequency controller connected to the stator assembly, characterized in that: The frequency conversion controller includes a circuit board, on which a power supply and several electronic components are arranged; wherein, The circuit board is mounted at one end of the stator assembly, and a shaft hole is provided at the center of the circuit board for mounting one end of the output shaft of the motor; The frequency conversion controller forms an AC-to-DC power supply through electronic components, and inputs AC power to the frequency conversion controller to drive the motor to operate; The frequency conversion controller is electrically connected to the winding of the stator assembly.

2. The controller stator integrated assembly according to claim 1, characterized in that: The stator assembly includes a housing, a stator core and a winding, wherein the stator core is fixedly mounted on the inner periphery of the housing, and the winding is sleeved on the stator core through an insulating frame; the circuit board is located on the inner periphery of the housing in a non-sealed state.

3. The controller stator integrated assembly according to claim 2, characterized in that: The insulating frame comprises an upper insulating frame unit and a lower insulating frame unit respectively installed at the upper and lower ends of the stator core; wherein the circuit board is fixedly installed on the upper insulating frame unit or the lower insulating frame unit.

4. The controller stator integrated assembly according to claim 2, characterized in that: The circuit board is fixedly mounted on the inner wall of the housing and is located at one end of the stator core.

5. The controller stator integrated assembly according to claim 3 or 4, characterized in that: The outer periphery of the circuit board is provided with a plurality of card interfaces which are distributed at intervals, and the corresponding insulating skeleton unit or housing is provided with a plurality of card connection convex columns, and each card interface is connected with the corresponding card connection convex column.

6. The controller stator integrated assembly according to claim 2, characterized in that: The housing comprises a cylindrical body with two ends being open, and a plurality of heat dissipation windows are arranged on the cylindrical body.

7. The controller stator integrated assembly according to claim 1, characterized in that: The circuit board is circular in shape.

8. The controller stator integrated assembly according to claim 1 or 7, characterized in that: The electronic components include a bus capacitor, a rectifier module, a filter module, a power module, an MCU module and peripheral circuit components; wherein the AC-to-DC power supply is formed by the bus capacitor, the rectifier module and the filter module.

9. A BLDC motor, characterized in that: A controller stator integrated assembly according to any one of claims 1-8 is used; a rotor assembly is provided on the inner periphery of the stator assembly, and the rotor assembly is integrally mounted and connected to the motor output shaft; two ends of the motor output shaft extend outward along two ends of the stator assembly respectively.

10. The BLDC motor according to claim 9, characterized in that: One end of the motor output shaft close to the frequency conversion controller extends through the shaft hole and is installed and connected with the motor end cover.

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