CN204442104U - Automobile small power DC motor filter - Google Patents

Abstract

The utility model relates to the field of automobile electronic components, in particular to a low-power DC motor filter device for automobiles. It includes a motor upper case, a motor lower case, and a filter circuit board with a filter circuit on it, the filter circuit board is clamped between the motor upper case and the motor lower case, and the motor upper case A power input port is provided on the top, and a motor input terminal is provided on the lower housing of the motor. The positive and negative poles of the power supply are connected to the input terminal of the filter circuit through the power supply input port, and the output terminal of the filter circuit is connected to the input terminal of the motor. . Installing the filter on the motor realizes an integrated installation, which effectively saves the space of the vehicle body and facilitates the arrangement of other parts of the car. The filter circuit board and the motor are connected and fixed by clamping, the structure is simple, the assembly is convenient, and it is convenient for maintenance and disassembly. At the same time, this arrangement simplifies the power circuit, improves the filtering effect, and enhances the comfort of the car.

Description

Low power DC motor filter device for automobile

technical field

The utility model relates to the field of automotive electronic components, in particular to a filter device for a low-power DC motor used in an automobile.

Background technique

With the continuous enrichment of automobile functions, there are more and more on-board electrical appliances. Various electrical equipment, especially motor loads, will generate conduction interference and radiation interference when running, which will affect the performance of other electrical equipment on the vehicle, and even Function fails. In order to solve this problem, an external filter is usually installed on the car. Since the filter is external, it takes up a lot of space in the body, which is not conducive to the arrangement of other components.

Utility model content

In order to solve the above-mentioned technical problems, the utility model provides a low-power direct current motor filter device for automobiles with a high degree of integration, which is beneficial to save the space of the vehicle body.

The technical scheme of the utility model is: a low-power DC motor filter device for automobiles, including an upper housing of the motor, a lower housing of the motor, and a filter circuit board on which a filter circuit is arranged, and the filter circuit board is set on the Between the upper casing of the motor and the lower casing of the motor, the upper casing of the motor is provided with a power input port, and the lower casing of the motor is provided with a motor input terminal, and the positive and negative poles of the power supply are connected to each other through the power input port. The input end of the filter circuit is connected, and the output end of the filter circuit is connected with the input end of the motor.

Further, the filter circuit board and the lower housing of the motor are provided with card slots, and the upper housing of the motor is provided with positioning pins, and the positioning pins pass through the card slots on the filter circuit board and the lower housing of the motor to The filter circuit board is fixed between the upper and lower shells of the motor.

Furthermore, a positioning block is provided at the center of the lower housing of the motor, and a positioning hole corresponding to the positioning block is provided at the center of the filter circuit board, and the positioning block passes through the positioning hole to fix the filter circuit board on the motor on the lower case.

The beneficial effects of the utility model are: the filter is installed on the motor to realize integrated installation, effectively save the space of the vehicle body, and facilitate the arrangement of other parts of the automobile. The filter circuit board and the motor are connected and fixed by clamping, the structure is simple, the assembly is convenient, and it is convenient for maintenance and disassembly. At the same time, this arrangement simplifies the power circuit, improves the filtering effect, and enhances the comfort of the car.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the utility model filter circuit schematic diagram;

In the figure: 1—filter circuit board, 2—motor upper housing, 3—motor lower housing, 4—power input port, 5—positioning block, 6—positioning hole, 7—positioning pin, 8—card slot, 9 —Filter chip.

detailed description

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. The specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute conflicts with each other.

As shown in Fig. 1, the utility model comprises a motor upper casing 2, a motor lower casing 3, and a filter circuit board 1 on which a filter circuit is arranged. The filter circuit board 1 is ring-shaped, and a circular positioning hole 6 is arranged in the middle, and card slots 8 are arranged symmetrically on both sides. A slot is also provided on the body 3 corresponding to the slot 8 of the filter circuit board 1 . The positioning block 5 passes through the positioning hole 6 on the filter circuit board 1 to fix the filter circuit board 1 thereon, and the slots of the two are overlapped. On the upper case 2, a positioning pin 7 matching the slot is arranged downward, and the positioning pin 7 of the upper case passes through the slot on the filter circuit board 1 and the motor lower case 3 to fix the filter circuit board 1 on the Between the upper and lower housings of the motor. The motor upper housing 2 is also provided with a power input port 4 for connecting the positive and negative poles of the power supply, and the motor lower housing 3 is also provided with a motor input terminal.

The filter circuit board 1 is provided with a filter circuit, as shown in Figure 2, the input end of the filter circuit is connected to the positive and negative poles of the power supply through the power input port 4, and the output end of the filter circuit is connected to the motor in the motor lower housing 3. input connection. The filter circuit includes a filter chip 9, the chip model can be BNX024H01, capacitors C1, C2, C3, C4 are connected in parallel between the positive and negative poles of the power supply and the filter chip 9, and an inductor is connected between the capacitors C2 and C3 L1 and L2, where L1 is connected to the positive pole of the power supply, and L2 is connected to the negative pole of the power supply. A Zener diode D1 is connected upside down between the positive and negative poles of the output terminal of the filter circuit, the cathode and the anode of the Zener diode are respectively connected to capacitors C5 and C6, and the capacitors C5 and C6 are grounded.

The power flows into the filter circuit through the upper casing 2 of the motor, and is filtered in the filter circuit before being output to the motor, which solves the problem of conduction interference and radiation interference of low-power DC motor loads well, and reduces the noise amplitude of the motor More than 40dB, meet the EMC test standard, enhance the safety and comfort of the vehicle.

The above is only a specific embodiment of the present utility model. It should be pointed out that any changes or replacements that can be easily imagined by those skilled in the art within the technical scope disclosed in the present utility model should be covered by the present utility model. within the scope of protection.

Claims (3)

1. an automobile small power DC motor filter, comprise motor upper shell (2), motor lower house (3), be provided with the filter circuit plate (1) of filter circuit above, it is characterized in that: described filter circuit plate (1) is fastened between motor upper shell (2) and motor lower house (3), described motor upper shell (2) is provided with power input port (4), described motor lower house (3) is provided with input end of motor, power positive cathode is connected with the input of filter circuit by described power input port (4), the output of described filter circuit is connected with input end of motor.

2. a kind of automobile small power DC motor filter as claimed in claim 1, it is characterized in that: described filter circuit plate (1) and motor lower house (3) are provided with draw-in groove (7), described motor upper shell (2) is provided with alignment pin (8), and filter circuit plate (1) is fixed on the upper-lower casing of motor through the draw-in groove (7) in filter circuit plate (1) and motor lower house (3) by described alignment pin (8).

3. a kind of automobile small power DC motor filter as claimed in claim 1, it is characterized in that: described motor lower house (3) center is provided with locating piece (5), described filter circuit plate (1) center is provided with the location hole (6) corresponding with locating piece (5), and filter circuit plate (1) is fixed on motor lower house (3) through described location hole (6) by described locating piece (5).