KR101441367B1 - Structure of Stator with Brush less ＤＣ Fuel pump of Automobile - Google Patents

Abstract

The present invention relates to a structure of a stator portion for a BLDC fuel pump for a vehicle, and more particularly, to a structure of a stator portion for a BLDC fuel pump for a vehicle. More specifically, the inner core divided into a plurality of portions is formed so as to be spaced apart from each other to reduce leakage magnetic fluxes, , The counter electromotive force is increased and the reduced magnetic force is supplemented even when the rotor formed of low-priced MAGNET (100% of ferrite sintered body or plastic magnet) is applied and cost cost is lower than that of the conventional expensive MAGNET (100% The cost of the fuel pump is reduced and the external controller detects the increased back electromotive force. Therefore, it is possible to control the position of the rotor and control the control of the rotor, The efficiency is increased, and the inner core Produced by the method for dividing the insert into six, whereby the mass productivity of the winding is good, there is a feature such that the investment cost and the facility cost savings in cost.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a BLDC fuel pump stator,

The present invention relates to a structure of a stator portion for a BLDC fuel pump for a vehicle, and more particularly, to a structure of a stator portion for a BLDC fuel pump for a vehicle. More specifically, the inner core divided into a plurality of portions is formed so as to be spaced apart from each other to reduce leakage magnetic fluxes, , The counter electromotive force is increased and the reduced magnetic force is supplemented even when the rotor formed of low-priced MAGNET (100% of ferrite sintered body or plastic magnet) is applied and cost cost is lower than that of the conventional expensive MAGNET (100% The cost of the fuel pump is reduced and the external controller detects the increased back electromotive force. Therefore, it is possible to control the position of the rotor and control the control of the rotor, The efficiency is increased, and the inner core By being produced by the method for dividing the insert into six, it is the mass productivity of the winding like, to a structure of the BLDC fuel pump stator parts for vehicles such as the investment cost and a lower cost facility cost.

A fuel tank for storing fuel is provided in a vehicle such as a gasoline engine or a diesel engine and the fuel tank is provided with a fuel pump for forcibly supplying fuel to the engine, The fuel pump is divided into a DC fuel pump and a BLDC fuel pump depending on the presence or absence of a brush (BRUSH).

Generally, the BLDC fuel pump related to the present invention supplies electric power to the STATOR (stator) through the terminal & connector when the engine start switch of the vehicle is ON, and when the electric power is supplied to the STATOR The BLDC fuel pump is capable of discharging the fuel in the fuel tank and the fuel discharged through the BLDC fuel pump is supplied to the engine at a constant pressure. do.

In the fuel pump fixing structure of the fuel supply module for a vehicle of Patent Publication No. 10-0773370 of Patent Document 4 provided by the applicant of the present invention, the soundproof / dustproof efficiency against noise / vibration generated by driving the fuel pump is improved, Thereby reducing the number of parts for fixing and simplifying the structure.

However, the core that is integrally discharged from the stator assembly of the conventional fuel pump is injected into a single core, so that leakage flux is generated between the cores, thereby reducing the efficiency of the fuel pump and causing a problem in driving the fuel pump.

Korean Patent Registration No. 10-1075795 Korean Patent Registration No. 10-0993665 Korean Patent Registration No. 10-0953409 Korean Patent Registration No. 10-0773370

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art,

The number of the inner cores divided by the number of the inner cores is formed to be spaced apart from each other, so that the leakage magnetic flux which has conventionally been generated is reduced, the amount of the flux linkage thereof is increased and the counter electromotive force is also increased, and a rotor formed of a low cost type MAGNET (ferrite sintered 100% The cost of the fuel pump is reduced and the cost of the fuel pump is reduced because the performance of the motor is supplemented and maintained while the cost cost is reduced by half or more than that of the conventional expensive MAGNET (100% The controller of the BLDC fuel pump detects the increased counter electromotive force to control the position of the rotor and the control of the control of the rotor so that the efficiency of the fuel pump increases without any additional sensor installation.

In addition, since the inner core is divided into 6 pieces and inserted into the inner core without changing the line process while maintaining the existing stator structure, the mass production of the winding is improved, and the investment cost and the facility cost are reduced. And it is an object of the present invention to provide a structure of a pump stator unit.

To achieve the above object, the present invention provides a structure of a stator for a BLDC fuel pump of a vehicle,

An inner core injected into the inside of the stator module is divided into a plurality of inner cores,

The plurality of inner cores are spaced apart from each other, so that leakage magnetic flux is reduced. The magnetic flux is increased by increasing the amount of the flux linkage and the counter electromotive force between the separated inner cores, and the increased back electromotive force is detected by an external controller, The present invention relates to a structure of a stator section for a BLDC fuel pump of a vehicle, which is capable of position sensing and control.

As described above, the structure of the stator portion for the BLDC fuel pump of the vehicle according to the present invention is such that the inner cores divided into a plurality of portions are spaced apart from each other, thereby reducing the leakage magnetic flux which has conventionally occurred, , The back electromotive force is increased and the magnetic force reduced by the rotor formed by the ferrite sintered 100% or the plastic magnet is replenished. As a result, the magnetic force is supplemented and maintained while the cost cost is reduced by half compared with the conventional 100% And the external controller senses the increased back electromotive force. Therefore, it is possible to control the position of the rotor and control the control of the rotor, so that the efficiency of the fuel pump can be increased without the need of installing a separate sensor.

In addition, since the inner core is divided into 6 pieces and inserted into the inner core without changing the line process while maintaining the existing stator structure, the mass production of the winding is improved, and investment and facility costs are reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a structure of a stator unit for a BLDC fuel pump of a vehicle according to an embodiment of the present invention,
2 to 3 are exploded perspective views showing the structure of a stator portion for a BLDC fuel pump of a vehicle according to an embodiment of the present invention,
4 is a schematic view showing an inner core according to an embodiment of the present invention.

The present invention has the following features in order to achieve the above object.

In a structure of a stator portion for a BLDC fuel pump of a vehicle,

An inner core injected into the inside of the stator module is divided into a plurality of inner cores,

The plurality of inner cores are spaced apart from each other, so that leakage magnetic flux is reduced. The magnetic flux is increased by increasing the amount of the flux linkage and the counter electromotive force between the separated inner cores, and the increased back electromotive force is detected by an external controller, Position sensing and control can be controlled.

The present invention having such characteristics can be more clearly described by the preferred embodiments thereof.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Before describing in detail several embodiments of the present invention with reference to the accompanying drawings, it is to be understood that the present invention is not limited to the details of construction and the arrangement of components shown in the following detailed description or illustrated in the drawings will be. The invention may be embodied and carried out in other embodiments and carried out in various ways. It should also be noted that the device or element orientation (e.g., "front," "back," "up," "down," "top," "bottom, Expressions and predicates used herein for terms such as "left," " right, "" lateral, " and the like are used merely to simplify the description of the present invention, Or that the element has to have a particular orientation. Also, terms such as "first "," second (secoNdFeB) "are used in this specification and the appended claims for the purpose of description and are not intended to indicate or imply its relative importance or purpose.

Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

FIG. 1 is a perspective view showing a structure of a stator portion for a BLDC fuel pump of a vehicle according to an embodiment of the present invention, and FIGS. 2 to 3 show a structure of a stator portion for a BLDC fuel pump of a vehicle according to an embodiment of the present invention. Fig. 4 is a schematic view showing an inner core according to an embodiment of the present invention. Fig.

1 to 4, the structure of the stator unit for a BLDC fuel pump of the vehicle according to the present invention includes a stator module 10 corresponding to a body, A plurality of inner cores 20, a plurality of coils 40 wound vertically on the plurality of inner cores 20, connectors 30 installed on the upper side of the stator module and connected to ends of the coils 40, An outer core 50 which is injected into the outer periphery of the stator module 10 to energize the magnetic force generated in the inner core 20 and a stator module 10 And a cover portion 60 which is molten to the upper side and the lower side of the inner core 20 to protect the connector 30 and the inner core 20 from the outside.

Here, a center portion of the inner core 20 is formed with a through hole (not shown), and the rotor 70 is further provided in the through hole. At this time, since the rotor 70 is made of 100% sintered ferrite material, the magnetic force is reduced to 50 to 70% as compared with the conventional rotor made of 100% of the high-temperature metal, Sintering reduces costs. At this time, the magnetic force which is smaller than the conventional one is supplemented by the following technique.

In the present invention, the rotor is made of a plastic magnet (a material which is synthesized with 70 to 90% of a lead metal and 10 to 30% by weight of a plastic resin). Therefore, it is possible to reduce the cost because the expensive expensive metal is less used than the conventional one.

The inner core 20 is injected to the inside of the stator module 10 as shown in FIGS. 2 and 4. The inner core 20, which is manufactured as a conventional integrated type, is divided into a plurality of inner cores 20 according to the present invention. That is, as shown in Fig. 4, the conventional cylindrical inner core 20 is divided into six pieces and each one is insert injection-molded.

One inner core 20 is injected into the inner side of the stator module 10. The inner core 20 is spaced apart from the inner core 20 by a predetermined distance and a counter electromotive force is generated between the separated inner core 20, The magnetic force lacking in the rotor 70 is supplemented by the inner core 20. At this time, before the back electromotive force increases, the amount of the flux linkage increases with the decrease of the leakage flux, thereby increasing the back electromotive force.

In addition, the position can be sensed from the outside by the counter electromotive force, so that the control can be performed because of the control, and the performance of the fuel pump can be ensured.

Then, the back electromotive force can be detected and the position and rotational force of the rotor 70 can be sensed, thereby controlling the controller.

Hereinafter, a comparison technique between the conventional inner core and the inner core of the present invention will be described with reference to tables.

1. Operability and control according to specification

division NdFeB series
(Metal halide) Plastic Magnet
(Hititori metal + PPS) FERRITE sintering
(Ferrite + PPS) Pump operation
And control Inner core integral type
(Conventional) ○ △ × Inner core split type
(Invention) ○ ○ ○

Note: ∘: No operational problems, △: Operational problems at high RPM and high pressure, ×: No operation

2. Pump efficiency and cost according to specification

division NdFeB series
(Metal halide) Plastic Magnet
(Hititori metal + PPS) FERRITE sintering
(Ferrite + PPS) Inner core integral type
(Conventional) efficiency 100% × × cost 100% × × Inner core split type
(Invention) efficiency 100% 95% 85% cost 100% 60% 40%

10: stator module 20: inner core
30: connector 40: coil
50: outer core 60: cover part
70: Rotor

Claims (3)

In the structure of the stator portion for a BLDC fuel pump of a vehicle,
A stator module 10 corresponding to the body;
A plurality of inner cores 20 injected into the stator module 10 to generate a magnetic force;
A coil (40) vertically received in each of the plurality of inner cores (20);
A connector 30 installed on the upper side of the stator module 10 and connected to the ends of the coils 40;
An outer core (50) which is injected into the outer periphery of the stator module (10) and energizes the magnetic force generated in the inner core (20);
And a cover portion (60) which is molten on the upper side and the lower side of the stator module (10) to protect the connector (30) and the inner core from the outside,
An inner core is insert injection-molded inside the stator module 10 and divided into a plurality of parts,
The plurality of inner cores 20 are spaced apart from each other, so that the leakage magnetic flux is reduced. The magnetic flux is increased due to the increase of the flux linkage amount and the back electromotive force due to the distance between the inner cores 20. The increased back electromotive force is detected by an external controller So that the position sensing and control of the rotor 70 can be controlled,
Wherein a rotor (70) is provided at the center of the stator module (10), and the rotor (70) is formed of a composite material of ferrite sintering and plastic resin. delete delete

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