JP2017093037A - Motor control module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motor control module which suppresses conduction failure of a terminal for connection with a motor when it is attached, and a control circuit for controlling the motor.SOLUTION: A motor control module 1 is substantially constituted of a body 2 having a sealing body 20 formed of resin, a control circuit 3 sealed of the sealing body 20, and generating a control signal for controlling a motor 9, an input terminal 4 projecting from the body 2 while being sealed partially of the sealing body 20, and to which an electric signal is inputted from an external device, and an output terminal 5 projecting from the body 2 while being sealed partially of the sealing body 20, and connected with the terminal 92 of the motor 9, and outputting a control signal, generated by the control circuit 3 based on the inputted electric signal, to the terminal 92 of the motor 9, and is integrated with the motor 9 by connection of the terminal 92 of the motor 9 and the output terminal 5.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a motor control module.

  As a conventional technique, an electric motor, a circuit board having electronic parts for controlling an encoder unit attached to the electric motor, and a circuit board that is disposed on the circuit board and is inserted into a bore hole of the electric motor, the electric motor A motor sensor system including two contact pins for supplying electric power and a clamp for holding a circuit board on an electric motor is known (for example, see Patent Document 1).

  In this motor / sensor system, two contact pins are mounted perpendicular to the surface of the circuit board.

Japanese Patent No. 3720021

  However, in the conventional motor / sensor system, a load is applied to the contact pin due to the attachment of the circuit board and the electric motor, and there is a possibility that a conduction failure occurs between the contact pin and the circuit formed on the circuit board.

  Accordingly, an object of the present invention is to provide a motor control module that suppresses poor conduction between a terminal connected to the motor and the control circuit that controls the motor by mounting the motor.

  One embodiment of the present invention includes a main body having a sealing body formed of a resin, a control circuit that is sealed by the sealing body and generates a control signal for controlling a motor, and protrudes from the main body and partially sealed. An input terminal portion that is sealed by a stationary body and receives an electrical signal from an external device, and protrudes from the main body and partly sealed by a sealing body, is connected to a terminal portion of the motor, and is based on the input electrical signal An output terminal unit that outputs a control signal generated by the control circuit to the terminal unit of the motor, and a motor control module that is integrated with the motor by connecting the terminal unit and the output terminal unit of the motor.

  ADVANTAGE OF THE INVENTION According to this invention, the conduction | electrical_connection defect with the control circuit which controls the terminal connected to a motor by the attachment of a motor and a motor can be suppressed.

FIG. 1 is a schematic diagram illustrating an example of a motor control module according to an embodiment and a motor to which the motor control module is attached. FIG. 2A is a schematic diagram illustrating an example of the motor control module according to the embodiment before bending, and FIG. 2B is a schematic diagram illustrating an example of the unit lead frame. c) is a schematic view showing an example of a part of a lead frame in which a plurality of unit lead frames are formed. FIG. 3A to FIG. 3C are schematic views illustrating an example of a bending process of the motor control module according to the embodiment.

(Summary of embodiment)
The motor control module according to the embodiment includes a main body having a sealing body formed of resin, a control circuit that is sealed by the sealing body and generates a control signal for controlling the motor, and projects from the main body. Part is sealed by a sealing body, and an input terminal part to which an electric signal is input from an external device and a part protruding from the main body and partly sealed by the sealing body, connected to the terminal part of the motor, An output terminal unit that outputs a control signal generated by the control circuit based on the signal to the terminal unit of the motor, and is integrated with the motor by connecting the terminal unit and the output terminal unit of the motor.

  In this motor control module, since a part of the output terminal part connected to the motor terminal part is sealed with a sealing body, the conduction failure between the output terminal part and the control circuit for controlling the motor due to the attachment of the motor is prevented. Can be suppressed.

[Embodiment]
(Outline of motor control module 1)
FIG. 1 is a schematic diagram illustrating an example of a motor control module according to an embodiment and a motor to which the motor control module is attached. FIG. 2A is a schematic diagram illustrating an example of the motor control module according to the embodiment before bending, and FIG. 2B is a schematic diagram illustrating an example of the unit lead frame. c) is a schematic view showing an example of a part of a lead frame in which a plurality of unit lead frames are formed. Note that, in each drawing according to the embodiment described below, the ratio between figures may be different from the actual ratio.

  As shown in FIGS. 1 and 2A, the motor control module 1 includes a main body 2 having a sealing body 20 formed of resin, and a control for controlling the motor 9 that is sealed by the sealing body 20. A control circuit 3 for generating a signal, a part protruding from the main body 2 and a part thereof are sealed by a sealing body 20, and an input terminal part 4 for inputting an electric signal from an external device, and a part protruding from the main body 2 and a part thereof An output terminal unit 5 that is sealed by the sealing body 20, is connected to the terminal unit 92 of the motor 9, and outputs a control signal generated by the control circuit 3 to the terminal unit 92 of the motor 9 based on the input electrical signal; , And is integrated with the motor 9 by connecting the terminal portion 92 of the motor 9 and the output terminal portion 5.

  As an example, the motor control module 1 is disposed integrally with the motor 9 in a mirror device of a vehicle having a small installation space. As an example, the motor 9 is a motor for adjusting the angle of the mirror surface of the mirror device or a driving motor for electrically storing the mirror device.

(Configuration of body 2)
As shown in FIG. 1, the main body 2 has a quadrangular prism shape. The motor control module 1 is attached to the motor 9 so that the surface 91 of the motor 9 and the attachment surface 21 of the main body 2 face each other.

  As described above, the main body 2 includes the sealing body 20 formed by sealing the control circuit 3 with resin. As an example, the sealing body 20 is formed using a thermosetting molding material in which an epoxy resin is a main component and a silica filler is added. The sealing with the resin is performed for the purpose of protecting the control circuit 3 from light, heat and humidity, for example.

  The main body 2 is formed after the lead frame 7 shown in FIG. After the main body 2 is formed, the motor control module 1 before being bent is separated from the frame 60.

  As shown in FIGS. 2A and 2B, a part of the input terminal portion 4 and the output terminal portion 5 protrude from the same side surface 22 of the main body 2.

  As shown in FIG. 1, the main body 2 has a thickness such that an upper surface 511 a of a first output terminal 51, which will be described later, and an upper surface 521 a of a second output terminal 52 are not in contact with the motor 9 to which the output terminal portion 5 is attached. Have That is, in the paper surface of FIG. 1, the upper surface 511 a and the upper surface 521 a are below the attachment surface 21.

  As a modification, the motor control module 1 includes a middle portion 511 of the first output terminal 51 and a middle portion 521 of the second output terminal 52 that are connected to the terminal portion 92 of the motor 9 and the connection end portions (connection end portions 512 and The connecting end 522) may be configured to have a width in the short direction that does not contact the motor 9 after being connected.

  That is, as shown in FIG. 1, the motor control module 1 is configured so that the width of the middle portion 511 having the upper surface 511a and the width of the middle portion 521 having the upper surface 521a are narrowed so that the motor 9 does not contact the upper surface 511a and the upper surface 521a. Alternatively, the thickness of the main body 2 and the widths of the middle part 511 and the middle part 521 may be adjusted so as not to come into contact with each other.

(Configuration of control circuit 3)
The control circuit 3 is formed by directly attaching electronic components to the input terminal portion 4 and the output terminal portion 5. Specifically, as shown in FIG. 2B, the control circuit 3 includes the mounting portion 410 and the mounting portion 420 of the input terminal portion 4 in the sealing region 200 sealed by the sealing body 20, and the output terminal. The electronic component is attached to the mounting part 517 and the mounting part 527 of the part 5.

  Specifically, in the control circuit 3, a control IC (Integrated Circuit) for driving the motor 9 and electronic components such as a resistor and a capacitor are mounted on the mounting portion 410 of the first input terminal 41 and the second input terminal 42. It is directly attached to the part 420, the mounting part 517 of the first output terminal 51, and the mounting part 527 of the second output terminal 52 by soldering or welding.

  Therefore, the first input terminal 41, the second input terminal 42, the first output terminal 51, and the second output terminal 52 function as wiring of the control circuit 3.

  For example, one of the first input terminal 41 and the second input terminal 42 is electrically connected to an external device that outputs an electric signal, and the other is electrically connected to a ground circuit. As an example, the external device is a vehicle ECU (Electronic Control Unit) of a vehicle.

  The first output terminal 51 is connected to the first terminal 93 of the motor 9. The second output terminal 52 is connected to the second terminal 94 of the motor 9.

  When the motor control module 1 controls the motor 9 that adjusts the mirror angle of the mirror device of the vehicle, as an example, an electric signal is supplied from the vehicle ECU to the input terminal unit 4 based on the operation of the adjustment switch. Next, when an electrical signal is input via the input terminal unit 4, the control circuit 3 processes this and outputs a control signal for controlling the motor 9 from the output terminal unit 5 to the motor 9.

  As an example, the control signal is a PWM (Pulse Width Modulation) signal. The motor 9 is driven based on this PWM signal.

(Configuration of input terminal unit 4 and output terminal unit 5)
The input terminal portion 4 and the output terminal portion 5 are formed by processing the lead frame 7. The input terminal unit 4 has a first input terminal 41 and a second input terminal 42.

  The first input terminal 41 and the second input terminal 42 have the same shape as shown in FIG. The first input terminal 41 and the second input terminal 42 have an elongated shape, and the width is larger than the connection end 411 and the connection end 421 where the sealed portions are out of the main body 2. It is getting wider. This input terminal part 4 is connected to the connector of the harness of a vehicle, for example.

  The output terminal unit 5 has a first output terminal 51 and a second output terminal 52. The first output terminal 51 and the second output terminal 52 before processing shown in FIG. 2A have a shape that is line-symmetric with respect to the center line of both in the paper surface of FIG.

  The processed first output terminal 51 shown in FIG. 1 is a mirror image of the second output terminal 52.

  The output terminal portion 5 is formed on the main body 2 side from each connection end portion connected to the terminal portion 92 of the motor 9 and bends in the same direction. The first starting point (starting point 515) and the first starting point of the bending The second starting point (starting point 525) is bent so that the respective connection ends face each other, and has a third starting point (516) and a fourth starting point (526) as starting points of the bending.

  As shown in FIG. 2A, the first output terminal 51 and the second output terminal 52 before processing have a crank shape in a portion protruding from the main body 2.

  Specifically, the first output terminal 51 is formed between a base portion 510 that is partially located inside the main body 2, the connection end portion 512 and the base portion 510, and extends in a direction that intersects the direction in which the base portion 510 extends. A middle portion 511 and a connection end portion 512 extending in the same direction as the base portion 510 and connected to the first terminal 93 of the motor 9 are provided.

  The base portion 510, the middle portion 511, and the connection end portion 512 are formed to have the same width except for the terminal end of the base portion 510 and the tip end of the connection end portion 512. In the state of the unit lead frame 6, as shown in FIG. 2B, the terminal end of the base 510 and the tip of the connection end 512 are connected to the frame 60 by the cutting part 61. The base 510 is connected to the frame 60 by a dam bar 62.

  The bending origin 515 of the base 510 and the middle 511 is located at the boundary between the base 510 and the middle 511. The middle portion 511 is bent toward the main body 2 from the starting point 515 together with the connection end portion 512. As an example, the bending angle is 90 °.

  The bending origin 516 of the middle part 511 and the connecting end part 512 is located at the boundary between the middle part 511 and the connecting end part 512. The connecting end 512 is bent in the direction of the base 510. As an example, the bending angle is 90 °. By this bending, the connecting end portion 512 is oriented in the normal direction of the mounting surface 21 of the main body 2 as shown in FIG. 1 and the short direction is aligned with the longitudinal direction of the main body 2.

  The second output terminal 52 includes a base portion 520 that is partially located inside the main body 2, a middle portion 521 that is formed between the connection end portion 522 and the base portion 520 and extends in a direction intersecting with the direction in which the base portion 520 extends, A connection end 522 that extends in the same direction as the base 520 and is connected to the second terminal 94 of the motor 9.

  As shown in FIGS. 2A and 2B, the middle portion 521 is located at the position where the connection end portion 522 is formed at the middle portion 511 of the first output terminal 51 where the connection end portion 512 is formed. On the other side.

  A bending start point 525 between the base portion 520 and the middle portion 521 is located at the boundary between the base portion 520 and the middle portion 521. The middle part 521 is bent toward the main body 2 from the starting point 525 together with the connection end part 522. As an example, the bending angle is 90 °.

  The bending origin 526 of the middle part 521 and the connecting end part 522 is located at the boundary between the middle part 521 and the connecting end part 522. The connecting end 522 is bent in the direction of the base 520. As an example, the bending angle is 90 °. By this bending, as shown in FIG. 1, the connection end portion 522 is oriented in the normal direction of the mounting surface 21 of the main body 2 and the short direction is aligned with the longitudinal direction of the main body 2. The connection end portion 512 and the connection end portion 522 face each other as shown in FIG.

  Similar to the first output terminal 51, the base 520, the middle 521, and the connection end 522 are formed to have the same width except for the end of the base 520 and the tip of the connection end 522. In the state of the unit lead frame 6, as shown in FIG. 2B, the terminal end of the base portion 520 and the tip end of the connection end portion 522 are connected to the frame 60 by the cutting portion 61. The base 520 is connected to the frame 60 by a dam bar 62.

  After the sealing body 20 is formed, the cutting part 61 and the dam bar 62 are cut, and the motor control module 1 before processing shown in FIG. 2A is obtained.

(Configuration of unit lead frame 6 and lead frame 7)
The lead frame 7 is formed as a single thin plate using, for example, a copper alloy material or an iron alloy material excellent in mechanical strength, electrical conductivity, thermal conductivity, corrosion resistance, and the like.

  A plurality of unit lead frames 6 are formed on the lead frame 7 as shown in FIG. The unit lead frame 6 is formed by processing the lead frame 7 by pressing or etching.

  The unit lead frame 6 is formed with a set of input terminal portions 4 and output terminal portions 5. As described above, in the motor control module 1, the electronic component is attached in the state of the unit lead frame 6, and the sealing body 20 is formed so as to seal the electronic component.

  Here, as an example, when the output terminal portion 5 has an L-shape that can be bent only once, the width of the unit lead frame 6 shown in FIG. 2B is widened and removed by pressing or etching. However, the number of motor control modules 1 made from the lead frame 7 is reduced as compared with the case where the output terminal portion 5 of the present embodiment is formed.

  However, in the motor control module 1, the connection end portions (connection end portion 512 and connection end portion 522) of the output terminal portion 5 connected to the terminal portion 92 of the motor 9 are disconnected from the input terminal portion 4 and the output terminal portion 5. In the state of the unit lead frame 6 which is not, it has a shape extending in a direction protruding from the main body 2. That is, since the unit lead frame 6 has a vertically elongated shape on the paper surface of FIG. 2B, the number of motor control modules 1 made from the lead frame 7 is increased as compared with the case where the bending process is performed once.

(Configuration of motor 9)
For example, as shown in FIG. 1, the motor 9 includes a motor main body 90, a terminal portion 92, an opening 910 and an opening 911 formed in the surface 91 of the motor main body 90, and an output shaft 95. Has been.

  The output shaft 95 is configured to rotate forward and backward based on a control signal output from the motor control module 1.

  The first output terminal 51 is inserted into the opening 910. The opening 910 exposes a first terminal 93 having an elongated plate shape having a protrusion at the tip, and is configured to be electrically connected to the inserted first output terminal 51.

  The second output terminal 52 is inserted into the opening 911. An elongated plate-like second terminal 94 having a protrusion at the tip is exposed in the opening 911 and is configured to be electrically connected to the inserted second output terminal 52.

  The first terminal 93 and the second terminal 94 are electrically connected to the coil in the motor main body 90.

  The shape of the terminal portion 92 is not limited to the shape described above, and may be a shape that conducts with the output terminal portion 5 inserted in the opening 910 and the opening 911 interposed therebetween.

(Regarding formation of output terminal portion 5)
FIG. 3A to FIG. 3C are schematic views illustrating an example of a bending process of the motor control module according to the embodiment. Below, the bending process after the sealing body 20 is formed and the motor control module 1 before processing is separated from the unit lead frame 6 will be described.

  As shown in FIG. 3A, after forming the sealing body 20, the cutting unit 61 and the dam bar 62 are cut to separate the motor control module 1 before bending from the unit lead frame 6.

  Next, as shown in FIG. 3B, the first output terminal 51 is bent from the starting point 515 to the main body 2 side, and the second output terminal 52 is bent from the starting point 525 to the main body 2 side. That is, the first output terminal 51 and the second output terminal 52 are bent in the same direction.

  Next, as shown in FIG. 3C, the connection end 512 is bent from the starting point 516 so as to face the second output terminal 52, and the connection end 522 is directed to the first output terminal 51. It is bent from the starting point 526, and the processing is completed. That is, the first output terminal 51 and the second output terminal 52 are bent so that the connection end portion 512 and the connection end portion 522 face each other and are parallel to each other. In addition, the process of FIG.3 (b) and the process of FIG.3 (c) are not limited to said order, After the process of FIG.3 (c) is performed, the process of FIG.3 (b) is performed. Also good.

(Effect of embodiment)
The motor control module 1 according to the present embodiment can suppress poor conduction between the output terminal portion 5 connected to the motor 9 and the control circuit 3 that controls the motor 9 by mounting the motor 9. Specifically, the motor control module 1 has a part of the output terminal portion 5 sealed and the output terminal portion 5 is not attached to the control circuit 3 with solder or the like. It is possible to suppress poor conduction due to.

  In the motor control module 1, the electronic components are directly attached to the input terminal portion 4 and the output terminal portion 5 formed from the lead frame 7 to form the control circuit 3. Therefore, compared with the case where the electronic components are attached to the substrate, A substrate is not required and can be manufactured at low cost. In addition, since the motor control module 1 seals the input terminal unit 4, the output terminal unit 5, and the electronic components, even if a load is applied to the input terminal unit 4 and the output terminal unit 5, it is difficult to cause poor conduction and is small. is there.

  Since the motor control module 1 is bent twice, the area of the unit lead frame 6 is smaller than that of the case where the unit lead frame 6 is bent once. Therefore, the motor control module 1 can be manufactured at a low cost with fewer end materials. Further, since the unit lead frame 6 has a small area, the motor control module 1 can be manufactured at a low cost because the number of unit lead frames 6 formed on one lead frame 7 is increased. Furthermore, since the motor control module 1 has many unit lead frames 6 formed on one lead frame 7, the cycle time is shortened and the motor control module 1 can be manufactured at low cost.

  The motor control module 1 forms the input terminal portion 4 and the output terminal portion 5 by the lead frame 7 and also attaches electronic components directly to the input terminal portion 4 and the output terminal portion 5 to form the control circuit 3. Compared with the case where electronic components are arranged, the degree of freedom of terminal layout is high, and it is easy to correspond to different motors 9.

  As mentioned above, although some embodiment and modification of this invention were demonstrated, these embodiment and modification are only examples, and do not limit the invention based on a claim. These novel embodiments and modifications can be implemented in various other forms, and various omissions, replacements, changes, and the like can be made without departing from the scope of the present invention. In addition, not all combinations of features described in these embodiments and modifications are necessarily essential to the means for solving the problems of the invention. Further, these embodiments and modifications are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1 ... Motor control module, 2 ... Main body, 3 ... Control circuit, 4 ... Input terminal part, 5 ... Output terminal part, 6 ... Unit lead frame, 7 ... Lead frame, 9 ... Motor, 20 ... Sealing body, 21 ... Mounting surface, 22 ... side surface, 41 ... first input terminal, 42 ... second input terminal, 51 ... first output terminal, 52 ... second output terminal, 60 ... frame, 61 ... cutting section, 62 ... Dam bar, 90 ... motor body, 91 ... surface, 92 ... terminal portion, 93 ... first terminal, 94 ... second terminal, 95 ... output shaft, 200 ... sealing region, 410 ... mounting portion, 411 ... connection end Part 420, mounting part 421 ... connection end part 510 ... base part, 511 ... middle part, 511a ... upper surface, 512 ... connection end part, 515 ... starting point, 516 ... starting point, 517 ... mounting part, 520 ... base part, 521 ... Middle part, 521a ... upper surface, 522 ... connection end part, 525 ... starting point, 26 ... start point, 527 ... mounting part 910 ... opening, 911 ... opening

Claims (6)

A main body having a sealing body formed of resin;
A control circuit which is sealed by the sealing body and generates a control signal for controlling the motor;
An input terminal portion that protrudes from the main body and is partially sealed by the sealing body, and receives an electrical signal from an external device;
The control signal generated by the control circuit based on the input electric signal is connected to the terminal portion of the motor by protruding from the main body and partially sealed by the sealing body. An output terminal section that outputs to the section,
With
A motor control module integrated with the motor by connecting the terminal portion of the motor and the output terminal portion. The output terminal portion includes a first output terminal and a second output terminal,
The first output terminal is a mirror image of the second output terminal,
A first starting point and a second starting point which are formed on the main body side from the respective connecting end portions connected to the terminal portions of the motor and bend in the same direction and become the starting points of the bending, and the respective connecting end portions. Are bent so that they face each other, the third starting point and the fourth starting point that are the starting points of the bending,
Having
The motor control module according to claim 1. A first middle portion between the first and third starting points of the first output terminal and a second portion between the second and fourth starting points of the second output terminal; The middle part
Having a width in a short direction that does not contact the motor after the terminal portions of the motor and the respective connection end portions are connected,
The motor control module according to claim 2. A part of the input terminal portion and the output terminal portion protrude from the same side surface of the main body,
The motor control module according to claim 1. The control circuit is formed by directly attaching electronic components to the input terminal portion and the output terminal portion.
The motor control module according to claim 1. The connecting end portion of the output terminal portion connected to the terminal portion of the motor has a shape extending in a direction protruding from the main body in the state of a unit lead frame in which the input terminal portion and the output terminal portion are not separated. Having
The motor control module according to claim 1.

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