JP2009071992A - Motor controller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a motor controller in which the reduction of effect by heat and switching noise, the improvement of reliability, and the reduction of the number of steps in manufacturing processes are achieved in mounting electronic parts highly densely. <P>SOLUTION: A printed-wiring board (2) for a main circuit, on which semiconductor switching elements (20) for driving a motor are mounted, and another printed-wiring board (1) for a drive circuit, which outputs a drive signal for driving the semiconductor switching elements (20), are used as individual printed-wiring boards. Tow printed-wiring boards are soldered vertically via a connector (10). <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a motor control device, and more particularly, to a motor control device that is miniaturized by mounting electronic components at high density.

In a conventional control device mounted with a printed circuit board, a second printed wiring board having a leg plate portion is inserted into a board mounting hole formed in the first printed wiring board, and is mounted vertically (for example, Patent Document 1). In addition, the drive circuit board and the control circuit board are electrically connected to each other by a flexible board, a connector is inserted and mounted on the flexible board, and a chip component as a noise absorbing electronic component is mounted. (See, for example, Patent Document 2).
In FIG. 7, the first printed circuit board 121 and the second printed circuit board 141 are mounted (coupled) directly without a connection connector or the like as a third component in a state where the first printed circuit board 121 and the second printed circuit board 141 are perpendicular to each other. is there. A rectangular board mounting hole 121 </ b> A for inserting the leg plate part 141 </ b> A of the second printed circuit board 141 is formed near the end of the first printed circuit board 121. An electronic component / electrical component 122 is mounted on the front surface 121a side of the first printed circuit board 121, and a component is mounted on the back surface 121b side as necessary. A plurality of electronic / electrical components 142 are mounted on the second printed circuit board 141, and a driver IC (not shown) for driving the component 142 is formed on the back surface 121b of the first printed circuit board 121. Aggregated in the immediate vicinity of the substrate mounting hole 121A, each end is formed as a plurality of comb-shaped connection lands 123a at positions outside the substrate mounting hole 121A, and inside the substrate mounting hole 121A. At each position, each end is formed as a plurality of comb-like connection lands 123b. The outer connection land 123a corresponds to the front surface connection land 143a of the second printed circuit board 141, and the inner connection land 123b corresponds to the rear surface connection land of the second printed circuit board 141. . Positioning lands 124a and 124b are formed on the surface 121a of the first printed circuit board 121 so as to face the vicinity of the four corners of the board mounting hole 121A. 124a is an outer positioning land, and 124b is an inner positioning land. The outer positioning land 124 a corresponds to the front surface side positioning land of the second printed circuit board 141, and the inner positioning land 124 b corresponds to the rear surface side positioning land of the second printed circuit board 141. The positioning lands 124 a and 124 b on the first printed circuit board 121 are also formed as end portions of wiring patterns constituting signal lines for the driver IC and for the component 142 on the second printed circuit board 141.

As described above, the control device mounted with the conventional printed circuit board mounts the second printed circuit board directly vertically on the first printed circuit board or connects the drive circuit board and the control circuit board using a flexible substrate. The board size is reduced by mounting a drive circuit or a control circuit component on the flexible board.
JP 2000-31615 A (page 7, FIG. 1) Japanese Patent Laying-Open No. 2001-267022 (page 8, FIG. 1)

A conventional control device mounted with a printed circuit board consists of a signal from a narrow-pitch component such as a microprocessor formed by connecting lands between printed wiring boards, and the pitch between the connecting lands is reduced. When this occurs, solder bridges are easily generated and the short circuit is easily corrected, increasing the number of man-hours for repairing the short circuit and increasing the number of manufacturing steps. Also, the connection between the printed wiring boards is only soldered at the connection land, ensuring strength. There was also a problem with reliability.
In addition, since the drive circuit and the control circuit are connected by a flexible substrate, it is necessary to mount an electronic component for noise absorption, which increases the number of manufacturing steps.
The present invention has been made in view of such problems, and control of an electric motor in which electronic components are mounted at high density, and the effects of heat and switching noise are reduced, reliability is improved, and manufacturing man-hours are reduced. An object is to provide an apparatus.

In order to solve the above problems, the present invention is configured as follows.
The invention according to claim 1 is a control circuit for an electric motor composed of a plurality of printed wiring boards on which circuit components are mounted, and a main circuit printed wiring board on which a semiconductor switching element for driving the electric motor is mounted; A printed circuit board for a drive circuit that outputs a drive signal for driving the semiconductor switching element is an individual printed wiring board, and the two printed wiring boards are soldered vertically via a connector.
According to a second aspect of the present invention, in the electric motor control apparatus according to the first aspect, the connector is an L-angle type connector.

Further, the invention according to claim 3 is the motor control device according to claim 2, wherein the L-angle type connector is configured for the main circuit when the main circuit printed wiring board is composed of two sheets. When the printed wiring board is composed of a single sheet, the mounting direction of the pins is reversed.
According to a fourth aspect of the present invention, in the motor control apparatus according to the first aspect, the drive signal is directly output from a microprocessor mounted on the printed circuit board for the drive circuit.
According to a fifth aspect of the present invention, in the motor control device according to the first aspect, a microprocessor is mounted on the drive circuit printed wiring board, and the microprocessor and the semiconductor switching element are spatially separated. It is mounted on the two printed wiring boards so as to be arranged closest.

According to a sixth aspect of the present invention, in the electric motor control device according to the first aspect, the main circuit printed wiring board has a copper foil thickness variable according to the power capacity of the semiconductor switching element. It is.
The invention according to claim 7 is the electric motor control device according to claim 1, wherein the drive circuit printed wiring board is a power capacity of the semiconductor switching element mounted on the main circuit printed wiring board. Regardless, the copper foil thickness is constant.
According to an eighth aspect of the present invention, in the motor control device according to the first aspect, the drive circuit printed wiring board is a power capacity of the semiconductor switching element mounted on the main circuit printed wiring board. Regardless, the mounting parts are the same.

According to the first and second aspects of the invention, since the main circuit board and the drive circuit board are soldered vertically via the connector, it can be easily configured, and the motor control device can be miniaturized.
According to the third aspect of the present invention, it is possible to cope with the problem by preparing only one type of drive circuit board regardless of the number of main circuit boards.
According to the fourth and fifth aspects of the present invention, since the microprocessor that outputs the drive signal and the semiconductor switching element can be arranged spatially closest to each other, the influence of noise can be suppressed and the reliability can be improved.
According to the invention according to any one of claims 6 to 8, only the printed circuit board for the main circuit varies the copper foil thickness according to the power capacity of the semiconductor switching element, and the drive circuit board has both the mounted component and the copper foil thickness. Since it is the same, any kind of power capacity can be handled by one type of drive circuit board, and it is efficient and wasteful.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a three-side view of a printed wiring board for a main circuit and a printed wiring board for a drive circuit used in the motor control device of the present invention, and FIG. 2 is a perspective view of the printed wiring board shown in FIG. In the figure, 1 is a drive circuit printed wiring board, 2 is a main circuit printed wiring board, 10 is a connector for electrically connecting the drive circuit printed wiring board 1 and the main circuit printed wiring board 2, and 20 is an output frequency. The semiconductor switching element 21 for converting the signal 21 is a microprocessor for outputting a drive signal.
The connector 10 connects a control signal from the microprocessor 21 mounted on the drive circuit printed wiring board 1 to the semiconductor switching element 20 mounted on the main circuit printed wiring board 2.
The present invention is different from the prior art in that the sub printed wiring board is a drive circuit, the main printed wiring board is a driven circuit, and the main circuit portion of the inverter is mounted on the driven circuit. Part.

Electronic components such as the microprocessor 21 are mounted on the printed circuit board 1 for the drive circuit, and main circuit components for driving the electric motor including the semiconductor switching element 20 are mounted on the printed circuit board 2 for the main circuit. ing.
The main function executed by the drive circuit printed wiring board 1 is to output a drive signal corresponding to an input operation command or speed command to the semiconductor switching element 20 mounted on the main circuit printed wiring board. The main circuit printed wiring board 2 is a process of supplying power to the motor and driving it based on the input drive signal.
Since the semiconductor switching element 20 is mounted on the main circuit printed wiring board 2, the power capacity of the semiconductor switching element 20 varies depending on the capacity of the applied motor. Accordingly, the main circuit printed wiring board 2 needs to have a copper foil thickness corresponding to the power capacity. Since it is in charge of the functions up to output, the copper foil thickness is constant regardless of the power capacity of the applied electric motor and the semiconductor switching element 20 to be driven, and the same mounting parts are used regardless of the power capacity is doing.

Further, as shown in FIGS. 1 and 2, the semiconductor switching element 20 and the microprocessor 21 are in a state in which the printed circuit board 1 for the drive circuit and the printed circuit board 2 for the main circuit are vertically soldered via the connector 10. Therefore, they are arranged on the respective wiring boards so as to come closest to each other.
Although it has been described that the drive signal for driving the semiconductor switching element 20 by PWM control is controlled by the microprocessor 21, the drive signal may be applied to a configuration in which the microprocessor 21 directly outputs the drive signal.

  Since the printed circuit board 1 for the drive circuit and the printed circuit board 2 for the main circuit are configured in this way, the signal for controlling the semiconductor switching element 20 can be minimized and is mounted on the printed circuit board 1 for the drive circuit. For electronic parts, the effects of heat and switching noise can be reduced, and reliability can be improved.

3 is a perspective view and a three-side view of a drive circuit printed wiring board (with an L-angle type connector) showing a second embodiment, and FIG. 4 shows the drive circuit printed wiring board of FIG. 3 as a main circuit. It is the perspective view connected to the printed wiring board. In the figure, 1 is a printed circuit board for a drive circuit, 2 is a printed circuit board for a main circuit, 11 and 12 are L-angle type connectors, 20 is a semiconductor switching element, and 21 is a microprocessor.
The printed circuit board for drive circuit 1 and the printed circuit board for main circuit 2 are electrically connected via L-angle type connectors 11 and 12, and the semiconductor switching element 20 and the microprocessor 21 are the same as in the first embodiment. Are mounted on the main circuit printed wiring board 2 and the drive circuit printed wiring board 1, respectively. For example, the tips of the L-angle type connectors 11 and 12 are fixed in holes formed in the main circuit printed wiring board 2.
5 is a perspective view in which the connection of the L-angle type connector 12 of the printed circuit board for drive circuit (with the L-angle type connector) of FIG. 3 is reversed, and FIG. It is the perspective view which connected the printed wiring board for mains to the printed wiring board for main circuits. In the figure, unlike FIGS. 3 and 4, two main circuit printed wiring boards are provided and are electrically connected to the second main circuit printed wiring board 3. That is, the drive circuit printed wiring board 1 and the main circuit printed wiring board 2 are electrically connected via the L-angle type connector 12, and the drive circuit printed wiring board 1 and the second main circuit printed wiring board 3 are connected. Are electrically connected via an L-angle type connector 11.
The present invention is different from the first embodiment in that the printed circuit board 1 for the drive circuit and the printed circuit board 2 for the main circuit are mounted using the L-angle connectors 11 and 12 instead of the connector 10, and the printed circuit board for the main circuit is mounted. Even when the two wiring boards 2 are configured, the same printed circuit board 1 for a drive circuit can be used by mounting the L-angle connector in the reverse direction.

As described above, since the semiconductor switching element 20 is mounted on the printed circuit board 2 for the main circuit, the power capacity of the semiconductor switching element 20 varies depending on the capacity of the applied motor. For this reason, the circuit for the main circuit has different parts and configuration, and the larger the capacity, the larger the mounting area must be secured. As a solution to this problem, there are cases where the main circuit printed wiring board is composed of two sheets. Even in such a case, by changing the mounting direction of the L-angle type connector 12, it can be easily mounted even if the same drive circuit board as in the case of a single main circuit printed wiring board is used.
In this way, the total size of the printed circuit board for the main circuit can be varied to match the difference in the capacity of the motor control device. Therefore, when developing a series with different capacities of the motor control device, one type of drive circuit is used. Since it can be dealt with just by preparing a printed wiring board, circuit design and manufacturing man-hours can be reduced and it is efficient.

3 views of the printed wiring board showing the first embodiment of the present invention. The perspective view of the printed wiring board which shows 1st Example of this invention The perspective view of the circuit board 1 for drive circuits which shows 2nd Example of this invention, A 3rd view The perspective view of the printed wiring board which shows 2nd Example of this invention. The perspective view of the wiring board 1 for drive circuits of another aspect which shows 2nd Example of this invention, 3 surface views The perspective view of the printed wiring board of another aspect which shows the 2nd example of this invention Perspective view of printed wiring board showing conventional technology

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Print circuit board for drive circuits 2 Print circuit board for main circuits 3 Print circuit board for 2nd main circuits 10 Connector 11 L angle type connector 12 L angle type connector 20 Semiconductor switching element 21 Microprocessor 121 1st printed circuit board 121A Board mounting hole 121a Front surface 121b of first printed circuit board Rear surface 122 of first printed circuit board Electronic component 123a mounted on first printed circuit board External connection land 123b of first printed circuit board First printed circuit board Inner connecting land 124a Outer positioning land 124b of first printed circuit board Inner positioning land 141 of first printed circuit board Second printed circuit board 141A Leg plate portion 141a Second printed circuit board surface 141b First Surface of the connection land at are mounted on the printed back surface 142 a second PCB board electronic components 143a leg plate section

Claims (8)

In a motor control device composed of a plurality of printed wiring boards on which circuit components are mounted,
A printed circuit board for a main circuit on which a semiconductor switching element for driving the electric motor is mounted and a printed circuit board for a drive circuit for outputting a drive signal for driving the semiconductor switching element are individually printed wiring boards, and the two printed wiring boards Is a control device for an electric motor characterized in that it is soldered vertically through a connector.   The motor control device according to claim 1, wherein the connector is an L-angle type connector.   When the L-angle type connector is composed of two main circuit printed wiring boards, it is mounted with the pin mounting direction opposite to that when the main circuit printed wiring board is composed of one sheet. The motor control device according to claim 2.   2. The motor control device according to claim 1, wherein the drive signal is directly output from a microprocessor mounted on the drive circuit printed wiring board.   A microprocessor is mounted on the printed circuit board for the drive circuit, and the microprocessor and the semiconductor switching element are mounted on the two printed circuit boards so as to be spatially arranged closest to each other. The motor control device according to 1.   2. The motor control device according to claim 1, wherein the printed circuit board for the main circuit has a copper foil thickness variable in accordance with a power capacity of the semiconductor switching element.   2. The electric motor according to claim 1, wherein the drive circuit printed wiring board has a constant copper foil thickness regardless of a power capacity of the semiconductor switching element mounted on the main circuit printed wiring board. Control device.   2. The electric motor according to claim 1, wherein the drive circuit printed wiring board has the same mounting component regardless of the power capacity of the semiconductor switching element mounted on the main circuit printed wiring board. Control device.

Images