KR20200041542A - Blower motor of air conditioning system for automotive vehicles - Google Patents

Abstract

The present invention relates to a blower motor for a vehicle air conditioning device, in which the blower motor has a structure with four poles, 18 slots, and two brushes, so that a coil winding work for a rotor is significantly facilitated, and a cogging torque and an unbalanced electromagnetic force are excellent, and thus excellent motor performance is maintained while improving productivity. In order to achieve such objectives, according the present invention, the blower motor for the vehicle air conditioning device includes: a motor housing; a plurality of stators installed at a predetermined interval on an inner circumferential surface of the motor housing; a rotor rotatably installed inside the stator; a plurality of commutators installed on a rotation center shaft of the rotor; and a plurality of brushes for applying electricity to the commutators, respectively, wherein the rotor includes: a plurality of slots formed at a predetermined interval on an outer circumferential surface of the rotor; and a plurality of coils wound in the slots, respectively. In addition, four stators are installed on the inner circumferential surface of the motor housing, and the blower motor has a four-pole 18-slot structure in which the number of the slots of the rotor which generates a rotational torque while acting attraction and repulsion on the four stators and the number of the coils wound in the slots are 18.

Description

BLOWER MOTOR OF AIR CONDITIONING SYSTEM FOR AUTOMOTIVE VEHICLES}

The present invention relates to a blower motor for a vehicle air conditioning apparatus, and more specifically, by being formed in a 4-pole 18-slot 2-brush structure, it is possible to have excellent cogging torque and unbalanced electromagnetic force characteristics while very easily winding the coil of the rotor. Through this, it relates to a blower motor for a vehicle air conditioning apparatus that can maintain excellent motor performance while improving productivity.

Vehicles are equipped with air conditioning systems to control the temperature in the cabin. Such an air conditioning apparatus is provided with various actuators, and as an example, there is a blower motor.

The blower motor rotates a blower fan while being operated according to an applied control signal. As shown in FIG. 1, a blower motor is generally composed of a 2-pole 12-slot 2-brush type.

In this blower motor, when electricity is applied to the commutators 3 through the brushes 1, a magnetic field is generated in the coil 6 portion of the slot 5 by the applied electricity, and the generated magnetic field is a stator around it. (Stator) (7) with the attraction force and repulsive force while generating a rotational torque, the rotor (8) is rotated due to the generated rotational torque.

However, since such a conventional blower motor has a two-pole, 12-slot type structure, it has a disadvantage in that it has a heavy weight and a large volume compared to an output.

In addition, since it is a two-pole, 12-slot type structure, when rotating, the “Cogging Torque” generated due to a change in attractive force between the coil 6 portion of the rotor 8 and the stators 7 is very large. There are disadvantages, and there is a problem in that vibration is generated in the rotor 8 and a change in the rotational speed of the rotor 8 is caused by these disadvantages.

In addition, in the process of applying electricity to the coil 6 of the rotor 8, the ripple current (pulsating current: Ripple) due to the periodic attraction change between the coil 6 part and the stators 7 and the resulting change in the magnetic field. Current) occurs, but this ripple current is very large due to the structure of the 2-pole 12-slot type.

On the other hand, taking this into consideration, it is possible to reduce the weight and size, making it compact and lightweight, reducing cogging torque between the coil and the stator of the rotor, and minimizing the ripple current generated during the electric application process of the rotor coil. Technology is being developed.

As an example, there is "Blower Motor for Vehicle Air Conditioning Device" in Korean Patent Application No. 2017-0012631 filed by the applicant.

This technique, as shown in FIG. 2, consists of four stators 7, two brushes 1, two slots 5 and coils 6 of the rotor 8. It has a 4-pole 24-slot 2-brush structure.

Since such a blower motor has a 4-pole 24-slot 2-brush structure, it has an output equivalent to a conventional 2-pole 12-slot 2-brush structure blower motor while reducing the size of the coil 6 and stator 7 of the rotor 8. Through this, it is possible to reduce the size and weight.

In addition, since it has a structure of a 4-pole 24-slot 2-brush, it is possible to reduce the size of the coil 6 and the stator 7 of the rotor 8 without loss of rotational torque of the rotor 8, through which the rotor ( The "cogging torque" generated between the coil 6 portion of the 8) and the stators 7 can be reduced, and as a result, the vibration of the rotor 8 due to the "cogging torque" and the rotor 8 The rotation speed change can be reduced.

In addition, since it has a structure of a 4-pole 24-slot 2-brush, it is possible to reduce the size of the coil 6 portion and the stator 7 of the rotor 8 without loss of rotational torque of the rotor 8, through which the coil ( 6) "Ripple current" due to the change in the magnetic field between the part and the stators 7 can be reduced.

By the way, the blower motor of this 4-pole 24-slot 2-brush structure can be reduced in size and weight, and can reduce cogging torque and ripple current, but winding the coil 6 to the slot 5 of the rotor 8 There is a disadvantage that the work is very difficult and difficult, and there is a problem that the productivity is significantly reduced due to these disadvantages.

In particular, in the process of designing and manufacturing 24 slots 5 of the rotor 8, the widths and openings of the slots 5 are configured to be very narrow. Due to such a narrow and narrow structure, a coil of a certain thickness in the slot 5 (6) There is a disadvantage that it is very difficult and difficult to wind.

Moreover, most of the winding work of the coil 6 with respect to the slot 5 is performed through an automatic winding facility, and such an automatic winding facility has to winding the coil 6 while entering and exiting the narrow and narrow slot 5. As shown in the figure, there is a disadvantage that it is very difficult for the automatic winding equipment to enter and exit the narrow and narrow slot 5, and because of these disadvantages, a lot of trouble is experienced in winding the coil 6 to the slot 5 of the rotor 8 There is a problem that, as a result, there is a drawback that the mass productivity of the blower motor is significantly reduced.

The present invention has been devised to solve the above-described conventional problems, and its purpose is to improve the structure, so that the coiling operation of the slots of the rotor is very easy, but it is equal to or equivalent to the 4-pole 24-slot 2-brush structure. It is to provide a blower motor for a vehicle air conditioning system that can have the above performance.

Another object of the present invention is that the blower motor for a vehicle air conditioner that can maintain a high performance while improving productivity by constructing such that the coil can be easily wound while having performance equal to or higher than that of a 4-pole 24-slot 2-brush structure. To provide.

In order to achieve this object, the blower motor for a vehicle air conditioning apparatus according to the present invention, a motor housing, a plurality of stators installed at intervals on the inner circumferential surface of the motor housing, and rotatably installed inside the stators A rotor, a plurality of commutators installed on the rotational center axis of the rotor, and a plurality of brushes for applying electricity to each commutator, the rotor, a plurality of slots formed at intervals on the outer peripheral surface, A blower motor for a vehicle air conditioner including a plurality of coils wound in each slot, the blower motor comprising: four stators installed on an inner circumferential surface of the motor housing; It characterized in that the four stators and the slot of the rotor that generates rotational torque while acting as a force and repulsive force, respectively, and a four-pole 18-slot structure having 18 coil portions wound on the slot.

Preferably, it is characterized in that it has a two-pole, four-pole, 18-slot, two-brush structure that applies electricity to each commutator of the rotor.

And it is characterized in that the commutators are 18 to correspond to the number of coils of the rotor.

In addition, the brushes are fixedly installed in the motor housing part corresponding to the commutators so as to apply electricity while making frictional contact with the commutators, and are installed at intervals of 90 ° to the inner circumferential surface of the motor housing. It is characterized by being.

In addition, the brushes are configured to be in frictional contact with two commutators per one, and are characterized in that electricity is applied to two commutators per one.

According to the blower motor for a vehicle air conditioner according to the present invention, by improving the structure of the 4-pole 18-slot 2-brush, the slot size of the rotor is increased, and the winding operation of the coil for the slot is easy, but the 4-pole 24-slot 2-brush structure It has the effect of having a motor performance equal to or greater than.

In addition, since coil winding is easy, it can have excellent motor performance compared to a 4-pole 24-slot 2-brush structure, thereby improving productivity and maintaining excellent motor performance.

1 is a cross-sectional view showing a conventional blower motor for a vehicle air conditioning system, showing a blower motor having a 2-pole 12-slot 2-brush structure,
Figure 2 is a cross-sectional view showing a conventional blower motor for a vehicle air conditioning apparatus, a cross-sectional view showing a blower motor of a 4-pole 24-slot 2-brush structure,
Figure 3 is a cross-sectional view showing the configuration of a blower motor for a vehicle air conditioning apparatus according to the present invention,
Figure 4 is a graph showing an example of the operation of the blower motor for a vehicle air conditioning apparatus according to the present invention, a graph analyzed by comparing the unbalanced electromagnetic force distribution by load and no load compared to a conventional 4-pole 24-slot 2-brush blower motor,
5 is a graph showing an example of the operation of the blower motor for a vehicle air conditioning apparatus according to the present invention, a graph analyzed by comparing the cogging torque generated between the coil and the stators of the rotor with a conventional 4-pole 24-slot 2-brush blower motor to be.

Hereinafter, preferred embodiments of the blower motor for a vehicle air conditioning apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

First, before looking at the features of the blower motor for a vehicle air conditioning apparatus according to the present invention, a blower motor for a vehicle air conditioning apparatus will be briefly described with reference to FIG. 3.

The blower motor for a vehicle air conditioning apparatus includes a motor housing 10. On the inner circumferential surface of the motor housing 10, the stators 20 are installed at regular intervals 20a, and inside the stators 20, the rotor 30 is rotatably installed.

The rotor 30 includes a plurality of slots 32 formed at intervals on the outer circumferential surface, and commutators 34 installed at regular intervals on the outer surface of the rotation center shaft 30a. In particular, the slots 32 are formed at intervals along the circumferential direction of the rotor 30, and the coil 36 is wound.

And the blower motor is provided with a pair of brushes 40 installed from the motor housing 10 toward the commutator 34 of the rotor 30, and these pair of brushes 40 are commutators of the rotor 30 Electricity is intermittently supplied to each commutator 34 of the rotor 30 while in frictional contact with (34).

In this blower motor, when electricity is applied to the commutator 34 through the brush 40, the coils 36 of the rotor 30 are excited and applied to the stator on the outside by applying the electricity. (20) and the manpower and repulsive force are generated, and the rotor 30 rotates while rotation torque is generated by the manpower and repulsive force with the stators (20).

Next, the features of the blower motor for a vehicle air conditioning apparatus according to the present invention will be described in detail with reference to FIGS. 3 to 5.

First, referring to FIG. 3, the blower motor of the present invention includes stators 20 installed on the inner circumferential surface of the motor housing 10, but the stators 20 have four structures.

The four stators 20 are installed at regular intervals 20a on the inner circumferential surface of the motor housing 10, but are installed such that the S and N poles are alternately arranged.

These four stators 20 generate rotational torque while the coil 36 wound on the rotor 30 is excited and demagnetized while exerting and repulsively acting on the coils 36. Therefore, the rotor 30 can be rotated due to the generated rotation torque.

In addition, the blower motor of the present invention has a slot 32 formed in the rotor 30 and commutators 34 installed in the rotational center shaft 30a of the rotor 30, respectively.

Since the rotor 30 of this configuration has 18 commutators 34 and slots 32, the coil 36 wound around the slot 32 also has 18 structures. As a result, the blower motor of the present invention can be configured with a structure of a 4-pole 18-slot 2-brush having 4 stators 20 and 18 slots 32.

Since the blower motor of the 4-pole 18-slot 2-brush structure has 18 slots 32 and coils 36 of the rotor 30, the number of slots 32 and coils 36 is a conventional 4-pole It is reduced compared to a 24-slot 2-brush motor.

Therefore, under the same condition of the rotor 30, the size of the slot 32 of the rotor 30 can be configured larger than that of the slot 32 of the 4-pole 24-slot 2-brush motor (see FIG. 2). In particular, the width and opening of the slot 32 can be made large.

Thus, when winding the coil 36 to the slot 32 of the rotor 30, the winding operation of the coil 36 is very easy.

In particular, since the slot 32 of the rotor 30 has a width and an opening of a sufficient size, an automatic winding facility for winding the coil 36 can easily enter and exit the slot 32 of the rotor 30. However, thanks to this structure, it is possible to easily perform the winding operation of the coil 36 without difficulty. As a result, the blower motor can be easily manufactured, thereby significantly improving the productivity and mass productivity of the blower motor.

On the other hand, the blower motor having such a 4-pole 18-slot 2-brush structure, as a result of the test, despite the configuration of the slot 32 and the coil 36 of the rotor 30 in 18 structures, the coil 36 of the rotor 30 ) And the stator 20, the “cogging torque” and the “unbalanced electromagnetic force” were found to be superior to the 4-pole 24-slot 2-brush motor.

That is, as shown in FIG. 4, according to the test result of comparing and analyzing the "unbalanced electromagnetic force distribution" of the 4-pole 18-slot 2-brush blower motor of the present invention and the conventional 4-pole 24-slot 2-brush blower motor, " It has been shown that the 4-pole 18-slot 2-brush blower motor of the present invention is superior in "no-load condition" and "no-load condition" compared to the conventional 4-pole 24-slot 2-brush blower motor.

In particular, the "unbalanced electromagnetic force distribution", the higher the central concentration, the higher the symmetry between the counterparts, the better. The 4-pole 18-slot 2-brush blower motor of the present invention, in both "no-load conditions" and "load conditions" The central concentration and symmetry of the "unbalanced electromagnetic force distribution" were found to be superior to that of a conventional 4-pole 24-slot 2-brush blower motor.

In addition, as shown in FIG. 5, according to the test result of comparing and analyzing the "cogging torque" of the 4-pole 18-slot 2-brush blower motor of the present invention and the conventional 4-pole 24-slot 2-brush blower motor, the present invention The four-pole 18-slot two-brush blower motor of, has been shown to have excellent "cogging torque" compared to the conventional four-pole 24-slot two-brush blower motor.

In particular, "cogging torque", the smaller the upper and lower amplitude is better, the 4-pole 18-slot 2-brush blower motor of the present invention, "cogging torque", conventional 4-pole 24-slot 2-brush blower It was found to be superior to the motor.

As a result, in the blower motor of the 4-pole 18-slot 2-brush structure according to the present invention, despite the slot 32 and the coil 36 of the rotor 30 having 18 structures, the rotor 30 and the stator 20 They showed excellent "cogging torque" and "unbalanced electromagnetic force characteristics" among them.

As a result, the size of the slot 32 of the rotor 30 is increased, so that the winding operation of the coil 36 with respect to the slot 32 can be easily performed. It is possible to have motor performance.

In particular, by facilitating winding work of the coil 36, and having excellent motor performance compared to a 4-pole 24-slot 2-brush structure, it is possible to increase productivity and maintain excellent motor performance.

Referring again to FIG. 3, the blower motor of the present invention includes a pair of brushes 40 that supply electricity to each commutator 34 of the rotor 30, wherein the brushes 40 are the commutator It is fixedly installed on the inner peripheral surface of the motor housing 10 corresponding to (34).

Particularly, a pair of brushes 40 are fixedly installed on the inner circumferential surface of the motor housing 10 corresponding to the commutators 34, but are installed at intervals of 90 ° to the inner circumferential surface of the motor housing 10. do.

On the other hand, these brushes 40 are configured to rub into contact with at least two commutators 34 at the same time, and the brushes 40 configured as such apply electric power to at least two commutators 34 per one. It is configured to.

The preferred embodiments of the present invention have been exemplarily described above, but the scope of the present invention is not limited to these specific embodiments, and can be appropriately changed within the scope described in the claims.

10: Motor housing 20: Stator
30: rotor 30a: center of rotation axis
32: Slot 34: Commutator
36: Coil 40: Brush

Claims (5)

Motor housing 10, a plurality of stators 20 installed at intervals 20a on the inner circumferential surface of the motor housing 10, and a rotor 30 rotatably installed inside the stators 20 And, a plurality of commutators 34 installed on the rotational center shaft 30a of the rotor 30 and a plurality of brushes 40 for applying electricity to each commutator 34, the rotor ( 30) is a blower motor for a vehicle air conditioner including a plurality of slots 32 formed at intervals on an outer circumferential surface and a plurality of coils 36 wound on each slot 32,
The stator 20 installed on the inner circumferential surface of the motor housing 10 is four;
The four stators 20 and the slot 32 of the rotor 30 that generates rotational torque while acting as an attractive force and a repulsive force, respectively, and the coil 36 wound around the slot 32 are 18. It features a 4-pole 18-slot (Slot) structure for the blower motor for vehicle air conditioning. According to claim 1,
A blower motor for a vehicle air conditioner having a 4-pole 18-slot 2-brush structure, characterized in that there are two brushes 40 for applying electricity to each commutator 34 of the rotor 30. According to claim 2,
The commutator 34,
Blower motor for a vehicle air conditioning apparatus, characterized in that 18 to correspond to the number of coils (36) of the rotor (30). The method of claim 2 or 3,
The brushes 40,
In order to apply electricity while in frictional contact with the commutators 34, the motor housing 10 corresponding to the commutators 34 is fixedly installed,
Blower motor for a vehicle air conditioning apparatus, characterized in that installed at intervals of an angle of 90 ° to the inner peripheral surface portion of the motor housing (10). The method of claim 4,
The brushes 40,
A blower motor for a vehicle air conditioner, characterized in that it is configured to be in frictional contact with two commutators (34) at a time, thereby applying electricity to the two commutators (34).

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