JPH022057Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to the structure of a motor with a control device.

In recent years, motors controlled by switching elements and the like have tended to be made smaller, with control devices being integrated into ICs, and attempts have been made to build motors that can be attached and assembled onto the outer surface of the motor.

However, when the output of the motor reaches about 30 watts, the amount of heat dissipated by the switching elements of the control device becomes considerably large, and a considerable amount of heat sink is required.

For this reason, when the output of a motor with a control device increases a little, a heat sink is required even if the motor and control device can be made compact, so the control device is provided separately from the motor.

If the motor and control device are provided separately,
This is convenient if the main control device is something that is frequently operated from the outside, but if the main control is a motor, it has the disadvantage of requiring wiring between it and the motor, resulting in a complicated configuration. was.

Moreover, since the motor and the control device are heat generating elements, there are restrictions on how they can be installed, so it is better to form them in one piece and configure the required external operations by wiring only the operating functions to the appropriate locations. I wanted it.

Under these circumstances, the present invention aims to provide a motor with a control device that is conveniently configured when attached to various types of equipment.

Hereinafter, the present invention will be explained based on an embodiment shown in the drawings. Fig. 1 is a side view of a motor with a control device according to an embodiment of the invention, and Fig. 2 shows the structure of the heat sink. FIG. 2 is a perspective view of main parts shown for clarity.

In FIG. 1, the motor with a control device is formed by molding a motor 1 with resin, and has an output shaft 2 extending from one side and a bearing portion 3 formed on the other side.

A printed circuit board 4 is attached to the outer peripheral surface of the motor 1 and a control device 5 is provided thereon, and the control device 4 is provided with a control element 6 .

Furthermore, the control element 6 is fixed and tightly attached to a heat sink 8 provided so as to cover the control device 5 with screws 9.

Further, as shown in FIG. 2, the heat sink 8 has a bearing holding portion 11 formed at an end 10, and is configured to hold a bearing that supports the opposite end of the output shaft 2. A through hole 12 through which the screw 9 passes is formed in the mounting portion of the control element 6 .

In such a configuration, the motor with a control device is formed by molding the motor with resin, and by incorporating the rotor, etc., the output shaft 2 is extended to one side, and the rear bearing is held in the bearing holding part 11. assemble.

Then, the control device 5 is assembled on the printed circuit board 4, and the control element 6 is brought into close contact with the heat sink 8 and fixed with screws 9.

Although such an assembly differs depending on the resin molding process of the motor 1, the heat sink 8 does not necessarily have to be formed integrally with the bearing holding part 11, and the printed circuit board 4 is securely fixed to the motor 1. If so, the heat dissipation plate may be formed into a U-shape or a box shape, cover the control device 4, and be fixed with screws 9.

Further, the heat sink 8 may be configured to cover a control device configured by attaching various parts,
For example, if a strong force is applied to motor 1 from the outside,
It is sufficient that the control device 4 is protected if it is accidentally dropped, or it may be covered to the extent that hands or foreign objects do not enter the charging portion.

The control element 6 of the control device 4 includes a transistor,
Various control elements such as ICs and thyristors fall under this category.
The mounting is not limited to the screws 9, but may be bonded if possible, or may be simply contacted.

Since the control element 6 comes into contact with the heat sink 8 in this way, the heat of the control element 6 is radiated by the heat sink 8, and the heating element can be concentrated, and the control device 4 is covered with the heat sink 8. This provides protection and is extremely convenient.

Therefore, it is possible to obtain a motor with a control device that has a simple structure and is inexpensive.

The heat sink 8 generally has a surface temperature of the control element 6.
Although the surface temperature of the motor 1 is about 70 to 80 degrees Celsius compared to the surface temperature of about 100 degrees Celsius, unlike infinite heat radiation, there is a limit to the heat radiation effect, but by being configured to cover the control device 4, the surface area The heat dissipation area becomes large and the heat dissipation of the motor 1 using the control element 6 is quite satisfactory.

As explained above, according to the present invention, the motor has one
Since the control device is provided on the body and covered with a heat sink, the heating element can be integrated, the control device can be protected, and a small and durable motor with a control device can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an embodiment of a motor with a control device according to the present invention, and FIG. 2 is a perspective view of the main parts thereof. 1... Motor, 6... Control element, 8... Heat sink.

Claims (1)

[Scope of utility model registration request] The motor is formed by resin molding, a control device to which wiring is connected from inside the mold is attached, a heat radiating plate is provided that contacts parts of the control device that require heat radiation, and the heat radiating plate covers the control device. A motor with a control device characterized by: