CN211481100U

CN211481100U - Electric automobile direct current motor with filtering and noise suppression module

Info

Publication number: CN211481100U
Application number: CN202020539293.1U
Authority: CN
Inventors: 陈项羽
Original assignee: Nanjing Sukai Power Engineering Co ltd
Current assignee: Nanjing Sukai Power Engineering Co ltd
Priority date: 2020-04-13
Filing date: 2020-04-13
Publication date: 2020-09-11
Anticipated expiration: 2030-04-13

Abstract

The utility model discloses a take electric automobile direct current motor of filtering noise suppression module, include respectively with electric lead, No. two electric leads that the brush electricity of motor is connected, No. one the electric lead is furnished with No. one punching capacitor, No. two the electric leads are furnished with No. two punching capacitors, No. one punching capacitor is different with No. two punching capacitor's capacitance value. The wiring end of the motor brush of the utility model is connected with a first feedthrough capacitor and a second feedthrough capacitor with different capacitance values, which have good attenuation effect on high-frequency interference in different frequency ranges respectively, and the sum of the two can filter and suppress noise of signals in a relatively wider frequency range; the first feedthrough capacitor and the second feedthrough capacitor are suitable for being used in the more compact environment of the motor wiring position, and are more convenient to install compared with ceramic chip capacitors and the like; in addition, No. one punching capacitor and No. two punching capacitors can be made into modular structure, conveniently choose for use the replacement, also are suitable for the later maintenance.

Description

Electric automobile direct current motor with filtering and noise suppression module

Technical Field

The utility model relates to an electric elements technical field, concretely relates to electric automobile direct current motor of area filtering noise suppression module.

Background

During the operation of the direct current motor, electric sparks are generated between the carbon brush and the commutator segment rotating at a high speed, so that high-frequency interference is emitted to the outside, and the high-frequency interference is not only wirelessly transmitted to the outside, but also transmitted to a motor, a power supply and other circuits along a power supply line, so that the normal operation of other equipment or circuits is influenced, and even the functions of other equipment are damaged. For example, the power of an electric vehicle motor is much higher than that of a common small vehicle-mounted motor, and high-frequency interference can be generated in the operation process and can be heard through a loudspeaker of a radio or seen on a display of a vehicle-mounted radar.

The parallel connection of a capacitor is an effective means for absorbing the spark and filtering high-frequency interference, but the high-frequency interference emitted by the direct current motor is wide in bandwidth, a single capacitor can only attenuate signals in a relatively narrow frequency range, and for the direct current motor of the electric automobile, the filtering and noise suppression performance of the parallel capacitor cannot meet the requirement.

SUMMERY OF THE UTILITY MODEL

In order to improve DC motor's filtering noise suppression performance, eliminate the influence to other equipment or circuit, the utility model provides a take electric automobile DC motor of filtering noise suppression module.

The utility model adopts the technical scheme as follows:

the electric automobile direct current motor with the filtering and noise suppression module comprises a first electric lead and a second electric lead which are respectively electrically connected with a brush of the motor, wherein the first electric lead is provided with a first straight-through capacitor, and an outer electrode of the first straight-through capacitor is electrically connected with the second electric lead or grounded; the second electric lead is provided with a second feedthrough capacitor, and the outer electrode of the second feedthrough capacitor is electrically connected with the first electric lead or grounded; the first feedthrough capacitor and the second feedthrough capacitor have different capacitance values.

The utility model has the advantages that: the wiring end of the motor brush of the utility model is connected with a first feedthrough capacitor and a second feedthrough capacitor with different capacitance values, which have good attenuation effect on high-frequency interference in different frequency ranges respectively, and the sum of the two can filter and suppress noise of signals in a relatively wider frequency range; the first feedthrough capacitor and the second feedthrough capacitor are suitable for being used in the more compact environment of the motor wiring position, and are more convenient to install compared with ceramic chip capacitors and the like; in addition, No. one punching capacitor and No. two punching capacitors can be made into modular structure, conveniently choose for use the replacement, also are suitable for the later maintenance.

Preferably: the first feedthrough capacitor comprises a first capacitor and a second capacitor which are connected in parallel, and the second feedthrough capacitor comprises a third capacitor and a fourth capacitor which are connected in parallel; the capacitance values of the first capacitor, the second capacitor, the third capacitor and the fourth capacitor are different.

Preferably: the first feedthrough capacitor further comprises a first inductor arranged between the first capacitor and the second capacitor.

Preferably: the second feedthrough capacitor further comprises a second inductor arranged between the third capacitor and the fourth capacitor; the inductance values of the first inductor and the second inductor are different.

Preferably: the first straight-through capacitor and the second straight-through capacitor are directly mounted on the grounding plate.

Drawings

Fig. 1 is a schematic circuit diagram of a first embodiment of the present invention.

Fig. 2 is a schematic circuit diagram of a second embodiment of the present invention.

Fig. 3 is a schematic circuit diagram of a third embodiment of the present invention.

Fig. 4 is a schematic circuit diagram of a fourth embodiment of the present invention.

The device comprises a first feedthrough capacitor 100, a first capacitor 101, a second capacitor 102, a first inductor 103, a second feedthrough capacitor 200, a third capacitor 201, a fourth capacitor 202, a second inductor 203, a motor 300, a first electric lead 301 and a second electric lead 302.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings and examples.

In the first and second embodiments, as shown in fig. 1 and 2 respectively: a DC motor with a filtering and noise-suppressing module for an electric automobile comprises a first electric lead 301 and a second electric lead 302 which are respectively electrically connected with a brush of a motor 300, wherein the first electric lead 301 is provided with a first straight-through capacitor 100, and the outer electrode of the first straight-through capacitor 100 is electrically connected with the second electric lead 302 or grounded; the second electric lead 302 is provided with a second feedthrough capacitor 200, and the outer electrode of the second feedthrough capacitor 200 is electrically connected with the first electric lead 301 or grounded; the first feedthrough capacitor 100 and the second feedthrough capacitor 200 have different capacitance values. The terminal of the brush of the motor 300 is connected with a first feedthrough capacitor 100 and a second feedthrough capacitor 200 with different capacitance values, which respectively have good attenuation effect on high-frequency interference in different frequency ranges, and the sum of the two can filter and suppress signals in a relatively wide frequency range; the first feedthrough capacitor 100 and the second feedthrough capacitor 200 are suitable for being used in a more compact environment of a motor wiring position, and are more convenient to install compared with ceramic chip capacitors and the like; in addition, the first feedthrough capacitor 100 and the second feedthrough capacitor 200 can be made into a modular structure, so that the first feedthrough capacitor and the second feedthrough capacitor are convenient to select and replace and are suitable for later maintenance.

Generally speaking, capacitors with different capacities are used for eliminating noise with different frequencies, 10 μ F is suitable for over 1000Hz, 1 μ F is suitable for 1K-10 KHz, and 0.1 μ F is suitable for 10K-100 KHz. Therefore, the first feedthrough capacitor 100 and the second feedthrough capacitor 200 can select different capacitance values in the same order of magnitude according to the rotation speed of the motor 300.

In example three, as shown in fig. 3: the first feedthrough capacitor 100 comprises a first capacitor 101 and a second capacitor 102 which are connected in parallel, and the second feedthrough capacitor 200 comprises a third capacitor 201 and a fourth capacitor 202 which are connected in parallel; the capacitance values of the first capacitor 101, the second capacitor 102, the third capacitor 201 and the fourth capacitor 202 are different. Compared with the first embodiment and the second embodiment, the embodiment can play a role in filtering and noise suppression on signals in a wider frequency range, and further improves the filtering and noise suppression performance, thereby meeting the use requirements of equipment.

In the fourth example, as shown in fig. 4: the first straight-through capacitor 100 further comprises a first inductor 103 arranged between the first capacitor 101 and the second capacitor 102; the second feedthrough capacitor 200 further comprises a second inductor 203 arranged between the third capacitor 201 and the fourth capacitor 202; the inductance values of the first inductor 103 and the second inductor 203 are different. In the fourth embodiment, the first inductor 103 is connected in series between the inner electrodes of the first capacitor 101 and the second capacitor 102, and the structure of the second inductor 203 is similar. The structure of two capacitance elements and an inductance element between the two capacitance elements shows low impedance to both the impedance source and the load, and can provide better high-frequency filtering performance.

In the second, third and fourth embodiments, as shown in FIGS. 2 to 4: the first feedthrough capacitor 100 and the second feedthrough capacitor 200 are directly mounted on the ground plate. The first feedthrough capacitor 100 and the second feedthrough capacitor 200 can be mounted and fixed by welding and screw connection, so that the first feedthrough capacitor and the second feedthrough capacitor can be well connected to a metal ground plate.

It is obvious that the above embodiments of the present invention are only examples for illustrating the present invention, and are not intended to limit the embodiments of the present invention. Obvious changes or variations coming within the spirit of the invention are intended to be covered by the scope of the invention.

Claims

1. The utility model provides an electric automobile direct current motor of band elimination filter noise suppression module, includes electric lead (301), No. two electric lead (302) that are connected with the brush electricity of motor (300) respectively, its characterized in that: the first electric lead (301) is provided with a first feedthrough capacitor (100), and the outer electrode of the first feedthrough capacitor (100) is electrically connected with the second electric lead (302) or grounded; the second electric lead (302) is provided with a second feedthrough capacitor (200), and the outer electrode of the second feedthrough capacitor (200) is electrically connected with the first electric lead (301) or grounded; the first feedthrough capacitor (100) and the second feedthrough capacitor (200) have different capacitance values.

2. The electric vehicle direct current motor with the filtering and noise-suppressing module of claim 1, characterized in that: the first straight-through capacitor (100) comprises a first capacitor (101) and a second capacitor (102) which are connected in parallel, and the second straight-through capacitor (200) comprises a third capacitor (201) and a fourth capacitor (202) which are connected in parallel; the capacitance values of the first capacitor (101), the second capacitor (102), the third capacitor (201) and the fourth capacitor (202) are different.

3. The electric vehicle direct current motor with the filtering and noise-suppressing module according to claim 2, characterized in that: the first straight-through capacitor (100) further comprises a first inductor (103) arranged between the first capacitor (101) and the second capacitor (102).

4. The electric vehicle direct current motor with the filtering and noise-suppressing module of claim 3, wherein: the second straight-through capacitor (200) further comprises a second inductor (203) arranged between the third capacitor (201) and the fourth capacitor (202); the inductance value of the first inductor (103) is different from that of the second inductor (203).

5. The electric vehicle direct current motor with the filtering and noise-suppressing module of claim 1, characterized in that: the first straight-through capacitor (100) and the second straight-through capacitor (200) are directly mounted on the grounding plate.