CN106329838A

CN106329838A - Electromagnetic interference suppression method and structure of direct-current motor commutator

Info

Publication number: CN106329838A
Application number: CN201610992736.0A
Authority: CN
Inventors: 蔡甫寒; 董克勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-11-01
Filing date: 2016-11-01
Publication date: 2017-01-11

Abstract

The invention relates to an electromagnetic interference suppression method and structure of a direct-current motor commutator. An existing direct-current motor has the problems that at the moment of disconnection of an inductor every commutation time of a motor commutator in the running process, sparks generated between electric brushes and commutator segments generate a large amount of electromagnetic interference to the outside, and normal work of nearby electronic equipment is directly influenced. The method comprises the step that a capacitor is additionally arranged between every two commutator segments to absorb electromagnetic interference generated by the commutator. According to the structure, a groove is formed in the inner side of each commutation blade at one end of the commutator, the n paster capacitors are arranged at equal intervals corresponding to the part between every two commutator segments, welding is carried out with the reflow welding technology, and then rotor coil windings are connected end to end to corresponding positions; the structure is reasonable, and the structure is convenient to use.

Description

DC motor commutator electromagnetic interference suppressing method and structure

Technical field

The present invention relates to DC motor commutator system, particularly DC motor commutator electromagnetic interference suppressing method and knot Structure.

Background technology

The groups such as the current main commutator segment of existing DC motor commutator, plastic casing, metal substrate, mica sheet, brush Becoming, when existing problems are operatings, engine commutator often commutates the moment of an inductance disconnection, produces between brush and commutator segment Spark externally produces substantial amounts of electromagnetic interference, directly affects the normal work of neighbouring electronic equipment, straight such as vapour vehicle windshield wiper Stream engine commutator can affect the cisco unity malfunction such as computer board and frequency modulation broadcasting, makes diverter product not reach national standard EMI electromagnetism Interference and the index of radiation interference.

Summary of the invention

It is an object of the invention to for drawbacks described above, it is provided that a kind of DC motor commutator electromagnetic interference suppressing method and knot Structure, inventive method is to add capacitor between two commutator segments to absorb electromagnetic interference produced by diverter, is at diverter Form a groove inside the commutator segment of one end, put equidistant between n chip capacitor correspondence each two commutator segment, put into Solder(ing) paste, employing reflow soldering process weld, then rotor coil winding head WEILIAN are received correspondence position, reach GB with this Conducted Electromagnetic Interference that EM1 specifies and Radiative EMI index.

The technical scheme is that DC motor commutator electromagnetic interference suppressing method and structure, it is characterised in that direct current Engine commutator electromagnetic interference suppressing method and structure are to add capacitor absorption diverter between two commutator segments to be produced Electromagnetic interference, its structure is that rotor coil is made up of 3 or n winding, and the commutator segment of diverter is made up of 3 or n sheet, two The capacitors count installed additional between individual commutator segment is identical with the quantity of commutator segment, and the capacitor that diverter installs additional is also by 3 or n Individual composition.

Described DC motor commutator electromagnetic interference suppressing method and structure, it is characterised in that DC motor commutator electromagnetism Disturbance restraining method and structure are that rotor coil is made up of 12 windings, and the commutator segment of diverter is formed by 12, two commutations The capacitors count installed additional between sheet is identical with the quantity of commutator segment, and the capacitor that diverter installs additional is also formed by 12, tool Body structure be inside the commutator segment of diverter one end formation one groove, by 12 chip capacitor correspondence each two commutator segments it Between equidistant put, put into solder(ing) paste, use reflow soldering process to weld, then rotor coil winding head WEILIAN is received correspondence Position.

Described DC motor commutator electromagnetic interference suppressing method and structure, it is characterised in that DC motor commutator electromagnetism The circuit connecting method that disturbance restraining method is formed with structure is that commutator segment P1 is connected rotor coil L1, rotor coil L2, electric capacity Device C1 and capacitor C2, the other end of rotor coil L2 connects commutator segment P2, rotor coil L3 together with the capacitor C2 other end With capacitor C3, the other end of rotor coil L3 connects commutator segment P3, rotor coil L4 and electricity together with the capacitor C3 other end Container C4, the other end of rotor coil L4 connects commutator segment P4, rotor coil L5 and capacitor together with the capacitor C4 other end C5, the other end of rotor coil L5 connects commutator segment P5, rotor coil L6 and capacitor C6 together with the capacitor C5 other end, turns The other end of subcoil L6 connects commutator segment P6, rotor coil L7 and capacitor C7, rotor line together with the capacitor C6 other end The other end of circle L7 connects commutator segment P8, rotor coil L8 and capacitor C8, rotor coil L8 together with the capacitor C7 other end The other end connect commutator segment P8, rotor coil L9 and capacitor C9 together with the capacitor C8 other end, rotor coil L9's is another One end connects commutator segment P9, rotor coil L10 and capacitor C10 together with the capacitor C9 other end, another of rotor coil L10 End connects commutator segment P10, rotor coil L11 and capacitor C11 together with the capacitor C10 other end, another of rotor coil L11 End connects commutator segment P11, rotor coil L12 and capacitor C12 together with the capacitor C11 other end, another of rotor coil L12 End connect with the capacitor C12 other end together with commutator segment P12, rotor coil L1 and capacitor C1, commutator segment and rotor coil and DC motor rotor one, when rotor rotates, commutator segment commutates between brush D1 and brush D2, and brush D1 and brush D2 connects direct current Power supply.

When instant invention overcomes operating in the past, engine commutator often commutates the moment of an inductance disconnection, brush and commutator segment Between the spark that produces externally produce substantial amounts of electromagnetic interference, have simple in construction, small and exquisite easy dress, rationally distributed, convenient fixing, Dependable performance, precision high advantage, improve practicality and reliability, can be widely used in direct current generator field.

Accompanying drawing explanation

Fig. 1 DC motor commutator electromagnetic interference suppressing method and structural representation

P1-12 commutator segment, C1-C12 capacitor, L1-L12 rotor coil, D1-D2 brush in Fig. 1.

Fig. 1 is DC motor commutator electromagnetic interference suppressing method and structural representation, and rotor coil is by 12 winding groups Becoming, the commutator segment of diverter is formed by 12, and the capacitors count installed additional between two commutator segments is identical with the quantity of commutator segment, The capacitor installed additional on diverter is also formed by 12.

Detailed description of the invention

Fig. 1 DC motor commutator electromagnetic interference suppressing method and structural representation, operation principle is at two commutator segments Between add capacitor, during electric machine rotation, rotor coil inductance electromotive force produces electromagnetism Interference when commutation and radiation is dry Disturb, make GB EMI electromagnetic interference index not reach requirement, the present invention be between two commutator segments, add capacitor after, absorb Electromagnetic interference produced by diverter.Embodiment is to add capacitor between two commutator segments, between two commutator segments The capacitors count installed additional is identical with the quantity of commutator segment, and rotor coil is made up of 12 windings, and the commutator segment of diverter is by 12 Sheet forms, and the capacitors count installed additional between two commutator segments is identical with the quantity of commutator segment, the capacitor that diverter installs additional Also being formed by 12, concrete structure is one groove of formation inside the commutator segment of diverter one end, by 12 chip capacitors pair Answer equidistant between each two commutator segment putting, put into solder(ing) paste, use reflow soldering process weld, then rotor coil around Group is end-to-end to correspondence position, and the circuit connecting method of formation is that commutator segment P1 connects rotor coil L1, rotor coil L2, electricity Container C1 and capacitor C2, the other end of rotor coil L2 connects commutator segment P2, rotor coil together with the capacitor C2 other end L3 and capacitor C3, the other end of rotor coil L3 connect together with the capacitor C3 other end commutator segment P3, rotor coil L4 and Capacitor C4, the other end of rotor coil L4 connects commutator segment P4, rotor coil L5 and electric capacity together with the capacitor C4 other end Device C5, the other end of rotor coil L5 connects commutator segment P5, rotor coil L6 and capacitor C6 together with the capacitor C5 other end, The other end of rotor coil L6 connects commutator segment P6, rotor coil L7 and capacitor C7, rotor together with the capacitor C6 other end The other end of coil L7 connects commutator segment P8, rotor coil L8 and capacitor C8, rotor coil together with the capacitor C7 other end The other end of L8 connects commutator segment P8, rotor coil L9 and capacitor C9 together with the capacitor C8 other end, rotor coil L9's The other end connects commutator segment P9, rotor coil L10 and capacitor C10 together with the capacitor C9 other end, and rotor coil L10's is another One end connects commutator segment P10, rotor coil L11 and capacitor C11 together with the capacitor C10 other end, and rotor coil L11's is another One end connects commutator segment P11, rotor coil L12 and capacitor C12 together with the capacitor C11 other end, and rotor coil L12's is another One end connects commutator segment P12, rotor coil L1 and capacitor C1, commutator segment and rotor coil together with the capacitor C12 other end With DC motor rotor one, when rotor rotates, commutator segment commutates between brush D1 and brush D2, and brush D1 and brush D2 connects directly Stream power supply.

Claims

1. DC motor commutator electromagnetic interference suppressing method and structure, it is characterised in that DC motor commutator electromagnetic interference presses down Method processed and structure are to add capacitor between two commutator segments to absorb electromagnetic interference produced by diverter, and its structure is to turn Subcoil is made up of 3 or n winding, and the commutator segment of diverter is made up of 3 or n sheet, the electricity installed additional between two commutator segments Number of containers is identical with the quantity of commutator segment, and the capacitor that diverter installs additional is also formed by 3 or n.

DC motor commutator electromagnetic interference suppressing method and structure the most according to claim 1, it is characterised in that unidirectional current Machine diverter electromagnetic interference suppressing method and structure are that rotor coil is made up of 12 windings, and the commutator segment of diverter is by 12 groups Become, the capacitors count installed additional between two commutator segments is identical with the quantity of commutator segment, the capacitor that diverter installs additional also by 12 compositions, concrete structure is one groove of formation inside the commutator segment of diverter one end, by corresponding for 12 chip capacitors every Equidistant between two commutator segments put, put into solder(ing) paste, use reflow soldering process to weld, then rotor coil winding head WEILIAN receives correspondence position.

DC motor commutator electromagnetic interference suppressing method and structure the most according to claim 1, it is characterised in that unidirectional current The circuit connecting method that machine diverter electromagnetic interference suppressing method is formed with structure is that commutator segment P1 is connected rotor coil L1, rotor Coil L2, capacitor C1 and capacitor C2, the other end of rotor coil L2 connect together with the capacitor C2 other end commutator segment P2, Rotor coil L3 and capacitor C3, the other end of rotor coil L3 connects commutator segment P3, rotor together with the capacitor C3 other end Coil L4 and capacitor C4, the other end of rotor coil L4 connects commutator segment P4, rotor coil together with the capacitor C4 other end L5 and capacitor C5, the other end of rotor coil L5 connect together with the capacitor C5 other end commutator segment P5, rotor coil L6 and Capacitor C6, the other end of rotor coil L6 connects commutator segment P6, rotor coil L7 and electric capacity together with the capacitor C6 other end Device C7, the other end of rotor coil L7 connects commutator segment P8, rotor coil L8 and capacitor C8 together with the capacitor C7 other end, The other end of rotor coil L8 connects commutator segment P8, rotor coil L9 and capacitor C9, rotor together with the capacitor C8 other end The other end of coil L9 connects commutator segment P9, rotor coil L10 and capacitor C10, rotor line together with the capacitor C9 other end The other end of circle L10 connects commutator segment P10, rotor coil L11 and capacitor C11, rotor line together with the capacitor C10 other end The other end of circle L11 connects commutator segment P11, rotor coil L12 and capacitor C12, rotor line together with the capacitor C11 other end The other end of circle L12 connects commutator segment P12, rotor coil L1 and capacitor C1 together with the capacitor C12 other end, commutator segment and Rotor coil and DC motor rotor one, when rotor rotates, commutator segment commutates between brush D1 and brush D2, brush D1 and electricity Brush D2 connects DC source.