CN217063420U

CN217063420U - Anti-interference motor of multislot car wind window scavenging pump

Info

Publication number: CN217063420U
Application number: CN202220272345.2U
Authority: CN
Inventors: 陈冠军; 王卓翊; 吴震
Original assignee: Changzhou Best Bmw Motor Co ltd
Current assignee: Changzhou Best Bmw Motor Co ltd
Priority date: 2022-02-10
Filing date: 2022-02-10
Publication date: 2022-07-26
Anticipated expiration: 2032-02-10

Abstract

The utility model discloses an anti-interference motor of multislot car windscreen washer pump, include: a rotor assembly, the rotor assembly comprising: the rotor comprises a rotor iron core and a commutator matched with the rotor iron core; the number of slots of the rotor core and the number of slots of the commutator are the same even number and are more than or equal to 10. The utility model provides an anti-interference motor of multislot car windscreen washer pump through the rotor core and the commutator in the even number groove that set up for motor winding is balanced distribution on the air gap circumference, and the radial magnetic pull force that makes the motor produce tends towards the balance, reduces the vibration and the torque ripple of motor, thereby further reduces the radiation level of motor. By increasing the number of slots of the commutator and the number of slots of the rotor core to 10, the inter-segment voltage between the commutator segments can be reduced, the level of sparks generated during commutation is reduced, and the electromagnetic radiation level of the motor is reduced. The utility model has the characteristics of simple structure, low cost, do benefit to batch production, interference killing feature is strong.

Description

Multi-groove anti-interference motor for automobile air window cleaning pump

Technical Field

The utility model relates to a car wind window scavenging pump motor technical field especially relates to an anti-interference motor of multislot car wind window scavenging pump.

Background

Along with the rapid development of new energy automobiles, more and more sensors and electronic equipment are arranged in the automobiles, and the requirements of the electronic equipment of the whole automobiles on EMC are more and more important, for example, a cleaning pump motor, a headlamp cleaning motor, a wiper motor and the like used in the cleaning process of front windshield of the automobiles need to have certain EMC anti-interference capability, because the motors are generally direct current brushed motors, the rotating speed of the motors is generally higher, the electromagnetic radiation generated by the motors during working cannot interfere with other electronic equipment of the automobiles, and the requirements of mainstream manufacturers of the new energy automobiles on the EMC anti-interference capability reach the national standard GB/T18655 five-level at present.

The cleaning pump motor in the prior art has some EMC anti-jamming circuits, but the circuit is simple, and the interference killing feature can not reach the lowest one-level standard of national standard, or the interference killing feature can pass through the low-level standard but the circuit design is complicated, needs redesign motor structure, makes the degree of difficulty and with high costs, is not convenient for mass production and manufacturing.

In view of the above problems in the prior art, it is urgently needed to design a new anti-interference motor for an automobile windshield cleaning pump to make up for the deficiencies in the prior art.

Disclosure of Invention

The utility model aims at providing an anti-interference motor of multislot car windscreen washer pump increases the groove number of rotor core and commutator under the condition that does not change the original mounting dimension of motor to with the design of the groove number of rotor core groove number and commutator for the even number, can effectively reduce the radiation level of motor.

In order to achieve the above object, the utility model provides a following scheme:

the utility model provides an anti-interference motor of multislot car windscreen washer pump, includes: rotor subassembly, stator module and end cover subassembly, its characterized in that, the rotor subassembly includes: the rotor comprises a rotor iron core and a commutator matched with the rotor iron core;

the number of the grooves of the rotor assembly and the number of the grooves of the commutator are the same even number and are more than or equal to 10.

Optionally, the rotor assembly is provided with a first overvoltage protection device, and the first overvoltage protection device is uniformly distributed at one end of the commutator segment of the commutator in an annular shape.

Optionally, the first overvoltage protection device is a resistance element, and the resistance element is a voltage dependent resistor.

Optionally, the anti-interference circuit is arranged on the end cover assembly, and the anti-interference circuit is a filter circuit.

Optionally, the filter circuit is an LC filter circuit.

Optionally, the LC filter circuit is an LC parallel connection circuit.

Optionally, the number of the capacitor and the number of the inductor in the LC parallel circuit are two respectively.

Optionally, the two inductors are connected in series with the commutator, and the two capacitors are respectively connected in parallel with the commutator.

Optionally, the filter circuit is further connected in parallel with a second overvoltage protection device.

Optionally, the second overvoltage protection device is a TVS element.

According to the utility model provides a concrete embodiment, the utility model discloses a following technological effect:

the utility model provides an anti-interference motor of multislot car wind window scavenging pump through the rotor core and the commutator in the even number groove that set up for motor winding is balanced distribution on the air gap circumference, and makes the radial magnetism pulling force that the motor produced tend to balance, reduces the vibration and the torque ripple of motor, thereby further reduces the radiation level of motor. By increasing the number of slots of the commutator and the number of slots of the rotor core to 10, the inter-segment voltage between the commutator segments can be reduced, the level of sparks generated during commutation is reduced, and the electromagnetic radiation level of the motor is reduced. The utility model provides an anti-interference motor of multislot car windscreen washer pump has simple structure, low cost, does benefit to batch production, characteristics that the interference killing feature is strong.

Drawings

In order to more clearly illustrate the present embodiment or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a rotor assembly of an anti-interference motor of a multi-groove automobile air window cleaning pump of the present invention;

FIG. 2 is a schematic structural diagram of a PCB circuit board of the anti-interference motor of the multi-groove automobile air window cleaning pump of the present invention;

FIG. 3 is a circuit diagram of an anti-interference circuit of the anti-interference motor of the multi-groove automobile air window cleaning pump of the present invention;

FIG. 4 is a graph of the results of a 5-slot motor vertical load electromagnetic radiation test;

FIG. 5 is a diagram of the results of a horizontal load electromagnetic radiation test of a 5-slot motor;

FIG. 6 is a graph of the results of a 10 slot motor vertical load electromagnetic radiation test;

FIG. 7 is a graph of the results of a 10-slot motor horizontal load electromagnetic radiation test;

description of reference numerals: 1. a rotor; 2. a commutator; 3. a first overvoltage protection device; 4. a first capacitor; 5. a first inductor; 6. welding the hole; 7. a second overvoltage protection device; 8. a second inductor; 9. a second capacitance.

Detailed Description

The technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments, and it is obvious that the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

The utility model aims at providing an anti-interference motor of multislot car windscreen washer pump increases the groove number of rotor core and commutator under the condition that does not change the original mounting dimension of motor to with the groove number design of rotor core groove number and commutator for the even number, can effectively reduce the radiation level of motor.

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the following detailed description.

The embodiment is as follows:

the utility model provides an anti-interference motor of multislot car wind window scavenging pump, as shown in fig. 1, the anti-interference motor of multislot car wind window scavenging pump includes:

rotor subassembly, stator module and end cover subassembly, rotor subassembly include rotor core and rather than the commutator of adaptation, and rotor core's slot number and commutator 2's slot number are the same even number, and more than or equal to 10, and the rotor core of 10 slot numbers is specifically adopted to this embodiment, and the commutator of 10 slot numbers is used in the cooperation.

This kind of motor on the market is mostly the standard design of 3 grooves and 5 groove rotor core and commutators at present, and the odd number groove number design of this kind of commutator has the innate not enough, and the switching-over spark that produces because of the odd number groove asymmetry is great when the motor commutates promptly, the utility model discloses an adopt the rotor core in 10 groove even number grooves of new design, the commutator in 10 groove even number grooves of cooperation makes the radiation level of motor body more conventional 3 grooves or 5 groove motors reduce by a wide margin.

The rotor assembly is provided with a first overvoltage protection device 3, and the first overvoltage protection devices 3 are uniformly distributed at one end of a reversing sheet of the commutator 2 in an annular shape; the first overvoltage protection device 3 is a resistance element, the resistance element is a varistor element, and a varistor is adopted in the embodiment in the type selection of the first overvoltage protection device 3.

As shown in fig. 2 and 3, a PCB is additionally arranged on the end cover, an anti-interference circuit is designed on the PCB, two welding holes 6 are welded on two sides of the PCB, and the anti-interference circuit on the PCB is connected with the motor body through the welding holes 6. The specific anti-jamming circuit of this embodiment adopts an LC filter circuit, and an inductor and a capacitor in the LC filter circuit are connected in parallel.

As shown in fig. 3, the number of the capacitors and the inductors in the LC parallel circuit is two, the first inductor 5 and the second inductor 8 are connected in series with the commutator, and the first capacitor 4 and the second capacitor 9 are connected in parallel with the commutator. The first capacitor 4 and the second capacitor 9 are differential mode capacitors, and are mainly used for inhibiting differential mode interference electromagnetic waves in sparks (electric arcs) generated between the commutator and the carbon brush in the running process of the motor, and the wave band is mainly concentrated at 150 kHz-30 MHz. The first inductor 5 and the second inductor 8 are both rod-shaped differential mode inductors which are used as energy storage filter elements, and form an LC resonance circuit with the first capacitor 4 and the second capacitor 9 in the circuit, so that the differential mode and common mode interference signals are inhibited.

The filter circuit is also connected with a second overvoltage protection device 7 in parallel, the type of the second overvoltage protection device 7 in this embodiment is a TVS element, and the TVS element is used for suppressing transient voltage at the moment of switching the motor.

This embodiment is through increasing PCB circuit board and 10 even number of slots groove rotor core, 10 even number of slots groove commutators and annular piezo-resistor on motor end cover subassembly, increases the anti-jamming circuit who is fit for batch production under the condition that does not change the original mounting dimension of motor, can solve on the market that conventional motor structure is congenital not enough in the aspect of the anti-interference of EMC, makes the anti-interference grade of EMC can reach more than GB/T18655 standard five grades.

The radiation test is carried out on the 5-slot motor and the 10-slot motor under the same condition, and the test frequency is as follows: 1447-:

the results of the radiation testing of the vertical load of the 5 slot machine are shown in table 1 in conjunction with fig. 4:

TABLE 1

The results of the radiation testing of the horizontal load of the 5-slot motor are shown in table 2, in conjunction with fig. 5:

TABLE 2

The test result shows that the radiation level of the 5-slot motor exceeds the limit value under vertical load and horizontal load, and the test result is that the standard requirement is not met.

The results of the radiation testing of the vertical load of the 10 slot motor are shown in table 3, with reference to fig. 6:

TABLE 3

The results of the radiation testing of the horizontal load of the 10 slot machine are shown in table 4, in conjunction with fig. 7:

TABLE 4

The test result shows that the radiation level of the 10-slot motor is within the limit range under vertical load and horizontal load, and the test result is in accordance with the standard requirement.

The utility model provides an anti-interference motor of multislot car wind window scavenging pump through the rotor core and the commutator in the even number groove that set up for motor winding is balanced distribution on the air gap circumference, and makes the radial magnetism pulling force that the motor produced tend to balance, reduces the vibration and the torque ripple of motor, thereby further reduces the radiation level of motor. By increasing the number of slots of the commutator and the number of slots of the rotor core to 10, the inter-segment voltage between the commutator segments can be reduced, the spark grade generated during commutation is reduced, and the electromagnetic radiation level of the motor is reduced. By arranging the overvoltage protection device on the rotor assembly and arranging the anti-interference circuit on the end cover, the EMC anti-interference grade of the motor can reach more than five grades of national standard GB/T18655 under the condition that the original installation size of the motor is not changed. The utility model provides an anti-interference motor of multislot car windscreen washer pump has simple structure, low cost, does benefit to batch production, characteristics that the interference killing feature is strong.

The principle and the implementation of the present invention are explained herein by using specific examples, and the above description of the embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for those skilled in the art, the idea of the present invention may be changed in the specific embodiments and the application range. In summary, the content of the present specification should not be construed as a limitation of the present invention.

Claims

1. The utility model provides an anti-interference motor of multislot car windscreen washer pump, includes: rotor subassembly, stator module and end cover subassembly, its characterized in that, the rotor subassembly includes: the rotor comprises a rotor iron core and a commutator matched with the rotor iron core;

the number of the slots of the rotor core and the number of the slots of the commutator are the same even number and are more than or equal to 10.

2. The anti-interference motor for the multi-groove automobile air window cleaning pump according to claim 1, wherein a first overvoltage protection device is arranged on the rotor assembly, and the first overvoltage protection devices are uniformly distributed on one end of a commutator segment of the commutator in an annular shape.

3. The anti-interference motor for the multi-groove automobile windshield washing pump according to claim 2, wherein the first overvoltage protection device is a resistance element, and the resistance element is a piezoresistor.

4. The anti-interference motor for the multi-groove automobile windshield washing pump according to claim 1, wherein an anti-interference circuit is arranged on the end cover assembly, and the anti-interference circuit is a filter circuit.

5. The anti-interference motor for the multi-groove automobile windshield washing pump according to claim 4, wherein the filter circuit is an LC filter circuit.

6. The anti-interference motor for the multi-groove automobile windshield washing pump according to claim 5, wherein the LC filter circuit is an LC parallel connection circuit.

7. The anti-interference motor for the multi-groove automobile windshield washer pump according to claim 6, wherein the number of the capacitors and the number of the inductors in the LC parallel circuit are two respectively.

8. The anti-interference motor for a multi-slot automobile windshield washer pump of claim 7, wherein the commutator is connected in series between the two inductors, and the two capacitors are respectively connected in parallel with the commutator.

9. The anti-jamming motor for a multi-groove automobile windshield washer pump according to claim 6, wherein the filter circuit is further connected with a second overvoltage protection device in parallel.

10. The anti-jamming motor for a multi-slot automobile windshield washer pump according to claim 9, wherein the second overvoltage protection device is a TVS element.