JP2008029120A - Brushless motor and driving device therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simplify the structure of a brushless motor. <P>SOLUTION: An end bracket 9 placed on a casing 2 is provided with a direct coupler 10 for connecting an external power supply to a stator coil 4. An external coupler 12 with a control component as a driving device for a motor M is provided with: a coupler 13b for input connected to an external connector 19 on the external power supply side, a coupler 13c for output directly connected to the direct coupler 10, and a control component housing 13a connected between the coupler 13b for input and the coupler 13c for output. The control component housing is provided therein with control components 15, 16, 17 for controlling driving of the stator coil 4. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention provides a brushless motor and a brushless which are provided with a stator coil and a rotor provided with a permanent magnet in a cylindrical case and are configured to rotate the rotor based on drive control of the stator coil by a control component. This belongs to the technical field of drive devices in motors.

  In general, this type of brushless motor does not generate mechanical noise and electrical noise as compared with a motor with a brush. In addition, when a brushless motor is used as a drive source of a fuel pump, for example, sliding resistance In addition, since the fluid resistance can be reduced, the pump efficiency is improved. However, since the brushless motor requires a driving device for controlling the driving of the stator coil, there is a problem that a space for arranging the driving device must be secured.

As an improvement measure, a fuel pump using a brushless motor has been proposed in which a brushless motor drive device is arranged on the upper surface of the fuel tank with respect to the fuel pump arranged in the fuel tank.
JP2005-315243

  However, in the conventional device, the driving device is disposed above the lid member of the fuel tank, and the wiring between the external power source and the driving device, and between the driving device and the fuel pump (brushless motor). There is a problem that both the wiring and the wiring work are necessary, and the wiring work becomes troublesome and complicated. Furthermore, since the drive device is exposed at the upper part of the lid member of the fuel tank, the drive device is arranged particularly in a case where the drive device is disposed in a limited space like a conventional motorcycle fuel tank. There is also a problem that it is difficult to secure the installation space so as not to interfere with other members, and there are problems to be solved by the present invention.

The present invention has been created in order to solve these problems in view of the above circumstances, and the invention of claim 1 is a brushless motor drive device, and the drive device includes: The brushless motor drive device includes an input unit for inputting an external power source and an output unit for direct connection to a direct coupler formed in the brushless motor.
According to the second aspect of the present invention, the drive device has an input portion with an input terminal arranged at one end and an output portion with an output terminal arranged at the other end, and drives the brushless motor between them. The drive device for a brushless motor according to claim 1, wherein a control component storage portion for storing a control component to be controlled is formed.
According to a third aspect of the present invention, the control component of the driving device is mounted on the substrate and arranged in the control component housing portion, and the substrate is formed with a notch recess through which the output terminal and the input terminal pass, respectively. The brushless motor drive apparatus according to claim 2.
A fourth aspect of the present invention is the brushless motor driving apparatus according to any one of the first to third aspects, wherein the brushless motor constitutes a pump motor.
The invention according to claim 5 is the drive apparatus for the brushless motor according to any one of claims 1 to 4, wherein the drive apparatus is waterproofed.
In a brushless motor in which a stator coil and a rotor having a permanent magnet are provided in a cylindrical case, a direct coupler for connecting an external power source to the stator coil is provided in the cylindrical case. , An input unit connected to an external connector on the external power supply side to the direct coupler, an output unit connected to the direct coupler, and a control for controlling the drive of the stator coil connected between the input unit and the output unit A brushless motor to which a drive device including components is directly connected.

By setting it as invention of Claim 1, the wiring between a brushless motor and a drive device can be eliminated.
According to the invention of claim 2, the connection configuration between the input / output terminal and the control component can be facilitated.
With the invention of claim 3, the drive device can be assembled with good workability.
By setting it as Claim 4, it can be set as a highly reliable pump motor.
According to the fifth aspect, the drive device can be disposed in the liquid as a waterproof structure.
According to the sixth aspect of the present invention, the wiring between the brushless motor and the drive device can be eliminated.

Next, embodiments of the present invention will be described with reference to the drawings.
In the drawings, 1 is a pump motor disposed in an engine tank of a motorcycle, and the pump motor 1 is configured using a three-phase brushless motor. And the casing 2 which comprises the pump motor 1 is located in the base end side, the motor part M is distribute | arranged, and the pump part P is arrange | positioned in the front end other side. The motor part M is provided with a plurality of stator coils 3 and a rotor 4 that is close to and faces the inner peripheral surface of the stator coil 3. A plurality of pairs of permanent magnets 5 are disposed on the outer peripheral surface of the rotor 4, and the rotation support shaft 4 a serving as the rotation center of the rotor 4 has a base end portion that is freely rotatable to the casing 2. It is bearing.

On the other hand, a pump portion P is formed on the distal end side of the casing 2, and the pump portion P has a pump chamber PR formed by a pair of cover bodies 6, 7 in the axial direction (a pair located on the proximal end and the distal end side). The tip end portion of the rotation support shaft 4a is rotatably supported in the pump chamber PR. An impeller 8 is externally fitted to the rotating support shaft 4a so as to prevent rotation, and is configured to rotate integrally with the rotating support shaft 4a.
The pump motor 1 is energized and energized in each stator coil 3 so that the impeller 8 is integrally rotated together with the rotation support shaft 4a, thereby being positioned on the front end side of the casing 2 (the front end side of the pump portion P). Fuel is sucked from a suction port 7 a formed in the front end side bracket 7, and fuel is discharged from a discharge port 6 a formed in the base end side bracket 6. The discharged fuel is connected to the stator coil 3, the rotor 4, and the like. , And is configured to project from a discharge port 2a formed in the base end portion of the casing 2 (the base end portion of the motor portion M), and these configurations are all conventional configurations. .

  The casing 2 is integrally formed with a proximal end flange portion 2b which is located on the proximal end side and protrudes in the outer diameter direction, and an end bracket 9 is integrally provided on the flange portion 2b. A direct coupler 10 is integrally formed on the outer end surface of the end bracket 9 on the base end side. As shown in FIG. 4, the direct coupler 10 includes a rectangular tube-shaped connection receiving portion 10 a having a cylindrical hole facing the left-right direction along the plate surface of the end bracket 9, and the main body portion 10 a. A plurality of terminals (not shown) extending in the cylinder hole direction are arranged and supported in parallel with each other in the front-rear direction and insulated from each other. And the base end part of each said terminal has penetrated the end bracket 9, and has extended in the main-body part 2a of the casing 2, and the several stator coil 3 accommodated in the main-body part 2a, and the rotor 4 are accommodated. The position detection sensor (Hall sensor) 11 for detecting the rotation state and other various sensors arranged in the pump motor 1 are electrically connected to each other. In this embodiment, six terminals are provided. Is disposed and supported by the direct coupler 10. Here, the number of terminals supported by the direct coupler 10 is for a signal line for controlling power supply to the stator coil 4a in addition to a pair of power supplies, and for a signal line for other sensors. A necessary number can be arranged as appropriate.

Reference numeral 12 denotes an external coupler with a control component corresponding to the drive device in which the present invention is implemented. The external coupler 12 with a control component is directly connected to a direct coupler 10 formed on the end bracket 9, The direct coupler 10 is configured to be electrically connected to each terminal.
As shown in FIG. 4, the external coupler 12 with a control component includes a case body 13 that is integrally formed of a resin material. A box-shaped control that opens upward at the center of the case body 13. A component housing portion 13a is formed. Further, the case body 13 extends from one side edge of the control component housing portion 13a toward one side, and is integrally formed with a rectangular tube-shaped input connection portion 13b that is open at one side. A rectangular tube-shaped output connecting portion 13c that extends from the other side edge of the housing portion 13a facing the one side edge toward the other side and that opens to the other side is integrally formed. The part 13b, the control component accommodating part 13a, and the output connecting part 13c are arranged in one direction (left and right direction). Here, the upper half portions of the input and output connecting portions 13b and 13c are respectively formed above the control component housing portion 13a.
In the square tube portions of the input and output connecting portions 13b and 13c, the six input and output terminals 13d and 13e having the same number as the number of terminals arranged on the direct coupler 9 are respectively provided in the tube hole direction. It is arranged and supported by various means such as a mold in a state of being parallel to each other in the direction and the front-back direction and insulated from each other. The base end portions of the input and output terminals 13d and 13e are bent downward toward the control component accommodating portion 13a, and the bent distal end portion is close to the bottom piece 13f of the control component accommodating portion 13a. Opposite state.

The control component housing portion 13a is provided with the substrate 14 so as to close the opening, but notches 14a are formed on the left and right edges of the substrate 14, and the notches 14a are formed in the notches 14a. The input and output terminals 13d and 13e extending from the input and output connecting portions 13b and 13c and bent toward the bottom piece 13f are set so as to be loosely fitted in a penetrating manner.
On the other hand, the substrate 14 is provided with various control parts for controlling power supply to the stator coil 4 (drive control of the stator coil 4) such as the power unit 15, the CPU 16, the control circuit 17, and the like. The components 15, 16, and 17 and the input / output terminals 13 d and 13 e are set so that necessary electrical connections are made on the substrate 14. The control component housing portion 13a on which the control components 15, 16, and 17 are mounted is filled with the resin material 18, and the resin material 18 is received from the upper pieces 13g and 13h of the input and output connecting portions 13b and 13c. It is filled from the output connecting portion 13c to the restricting piece 13i protruding and arranged on the control component housing portion 13a side, whereby the substrate 14, the various control components 15, 16, 17, and the input The output terminals 13d and 13e are covered with the resin material 18 so that the control component housing portion 13a can be waterproofed.
The external coupler 12 with a control component is mounted (connected) with the necessary control components 15, 16, and 17 in advance on the substrate 14, and the substrate 14 with the control components 15, 16, and 17 is mounted on the substrate 14 shown in FIG. A) Inclined as shown in FIG. 5A, inserted into the notch recess 14a, accommodated in the control component accommodating part 12a with the output terminals 13d, 13e loosely fitted, and soldered the input, output terminals 13d, 13e to the substrate 14 For example, it is configured to be incorporated by connecting.

  Reference numeral 19 denotes an external connector connected to the input connecting portion 13b. The external connector 19 includes a rectangular tube-shaped connecting portion 19a that can be externally fitted to the output connecting portion 13c. The distal end portions of the six terminals 19b extend in the cylinder hole direction in the cylinder of the connecting portion 19a. The base end portions of these terminals 19b are respectively connected to the power supply, the external control unit, etc. A wiring cord 20 is connected to connect between the two.

Then, the output coupling portion 13c of the external coupler 12 with the control component is externally fitted (connected) to the coupling receiving portion 10a of the direct coupler 10 formed on the end bracket 9 of the pump motor 1, whereby the direct coupler 10 side. The terminal and the main power terminal 13e are connected, and the input terminal 13d and the external connector 19 are connected by fitting (connecting) the connection part 19a of the external connector 19 to the input connection part 13b of the external coupler 12 with a control component. The terminal 19b is connected so that the motor unit M of the pump motor 1 can be driven and controlled.
In this connected state, an engaging portion 10b is formed on the upper piece of the direct coupler connection receiving portion 10a, while an upper piece 13h of the output connecting portion 13c is engaged with the engaging portion 10b in a retaining manner. A locking receiving portion 13j to be stopped is formed and set so that the external coupler 12 with a control component and the direct coupler 10 are connected in a retaining manner. A locking portion 13k is formed on the upper piece 13g of the input connecting portion 13b, while a locking receiving portion 19c is formed on the external connector connecting portion 19a so as to prevent the locking portion 13k from coming off. The external coupler 12 with a control component and the external connector 19 are set so as to be connected in a retaining manner.

In the present embodiment configured as described, when the pump motor 1 using a three-phase brushless motor is driven, a driving device including control parts 15, 16, and 17 for controlling the driving of the stator coil 3 is required. In this case, however, the driving device is configured as an external coupler 12 with a control component, and is connected to an input connecting portion 13b for inputting an external power source and a direct coupler 10 disposed on an end bracket 9 of the pump motor 1. An output connecting portion 13c for (connecting) is provided. As a result, the external coupler 13 with a control component is directly connected to the pump motor 1, so that conventionally no wiring is required between the drive unit and the pump motor, and the connection work is facilitated. The structure can be simplified and the cost can be reduced. Furthermore, unlike the conventional one, there is no need to provide a drive device outside the fuel tank, and it is not necessary to consider interference with other members, thus reducing the space around the fuel tank (compact). be able to.
In addition, in this case, for one brushless motor of the standard, by appropriately replacing the control components 15, 16, and 17 accommodated in the control component accommodating portion 13a, an external coupler having different control components is obtained. Without changing the structure of the brushless motor, it can be driven as a motor with different performance, and there is an advantage that versatility can be improved.

  Furthermore, in the embodiment in which the present invention is implemented, the control component housing portion 13a provided in the external coupler 12 with control components is between the input and output connecting portions 13b and 13c, and the control component housing portion 13a. Are formed in one end portion and the other end portion, and output connecting portions 13b and 13c are formed, and these are arranged in the connecting direction of the input and output connecting portions 13b and 13c. 13e and the control components 15, 16, and 17 on the board 14 can be easily connected.

  In this case, the substrate 14 is formed with notched recesses 14a for penetrating the input and output terminals 13d and 13e molded in the input and output connecting portions 13b and 13c, and the control components 15, 16, and 17 are mounted on the substrate. 14 is mounted in advance and can be accommodated in the control component accommodating portion 13a. Therefore, the assembling work of the external coupler 12 with a control component can be performed with good workability.

  In addition, in this case, since the control component housing portion 13a is waterproofed by the resin material 18, a highly reliable waterproof structure can be obtained, and the brush motor with built-in pump motor 1 is disposed in the liquid. It can also be installed.

  Of course, the present invention is not limited to the above-described embodiment, and the number of input terminals of the external coupler with the control component accommodating portion serving as the driving device is not limited to the one that does not need to extract the sensor signal to the outside. In this case, an external connector for DC power supply can be connected. Thus, in the brushless motor BM that is driven using the external coupler 21 in the second embodiment in which a pair of terminals are provided in the input connecting portion, as shown in FIG. 6, a general-purpose DC motor with a brush is used. The external connector C connected to the DM is removed from the DC motor DM, the external coupler 21 is connected to the external connector C, and the brushless motor BM is connected to the external coupler 21, thereby replacing the DC motor DM with the brushless motor BM. Therefore, the DC motor DM and the brushless motor BM can be easily exchanged.

It is a partially omitted sectional view of the pump. It is a principal part perspective view explaining the connection state of the direct coupler of a pump, and the external coupler with a control component. It is a principal part perspective view explaining the state which the external coupler with a control component connected with the direct coupler of the pump. It is a disassembled perspective view explaining the connection state of a direct coupler, an external coupler with a control component, and an external connector. 5 (A), (B), (C), and (D) are front views for explaining a state in which the board is incorporated into the external coupler with control parts, a plan view of the board, and a board is incorporated into the external coupler with control parts. It is a top view of a state, and a front view of an external coupler with a control component. In a second embodiment, it is a pattern figure explaining exchange of a direct-current motor and a brushless motor.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pump motor 2 Casing 4 Stator coil 5 Rotor 9 End bracket 10 Direct coupler 11 Position detection sensor 12 External coupler with control part 13 Case body 13a Control part accommodating part 13b Input connection part 13c Output connection part 13d Input terminal 13e Output Terminal 14 Board 15 Power section 18 Resin material 19 External connector

Claims (6)

  Brushless motor driving device, wherein the driving device is provided with an input unit for inputting an external power source and an output unit for directly connecting to a direct coupler formed in the brushless motor Drive device.   The drive device has an input portion with an input terminal disposed at one end and an output portion with an output terminal disposed at the other end, and accommodates a control component for driving and controlling the brushless motor between them. The drive device in the brushless motor according to claim 1, wherein a control component housing portion is formed.   The control component of the drive device is mounted on a substrate and arranged in a control component housing portion, and the substrate is formed with a notch recess through which an output terminal and an input terminal pass, respectively. The drive apparatus in a brushless motor of description.   The brushless motor according to any one of claims 1 to 3, wherein the brushless motor constitutes a pump motor.   The drive device for a brushless motor according to any one of claims 1 to 4, wherein the drive device is waterproofed.   In a brushless motor provided with a stator coil and a rotor equipped with a permanent magnet in a cylindrical case, a direct coupler for connecting an external power source to the stator coil is provided in the cylindrical case, while an external power supply is connected to the direct coupler. A drive device comprising an input unit connected to an external connector on the power source side, an output unit connected to the direct coupler, and a control component connected between the input unit and the output unit to control the drive of the stator coil Brushless motor that is directly connected.

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