CN206517240U - DC motor commutator electromagnetic interference suppresses structure - Google Patents

Abstract

The utility model DC motor commutator electromagnetic interference suppresses structure, there is engine commutator when problem is operating and often commutate the moment that an inductance disconnects in current existing direct current generator, the spark produced between brush and commutator segment externally produces substantial amounts of electromagnetic interference, directly affect the normal work of neighbouring electronic equipment, method is to be to install additional between two commutator segments capacitor to absorb electromagnetic interference produced by commutator, structure is one groove of formation on the inside of the commutator segment of commutator one end, put equidistant between n chip capacitor correspondence each two commutator segment, welded using reflow soldering process, rotor coil winding is connected to correspondence position end to end again, it is rational in infrastructure, it is easy to use.

Description

DC motor commutator electromagnetic interference suppresses structure

Technical field

The utility model is related to DC motor commutator system, particularly DC motor commutator electromagnetic interference and suppresses knot Structure.

Background technology

The groups such as the current existing main commutator segment of DC motor commutator, plastic casing, metal substrate, mica sheet, brush Into there is problem is that engine commutator often commutates the moment that an inductance disconnects when operating, and is produced between brush and commutator segment Spark externally produces substantial amounts of electromagnetic interference, directly affects the normal work of neighbouring electronic equipment, and such as vapour vehicle windshield wiper is straight Stream engine commutator can influence the cisco unity malfunctions such as computer board and frequency modulation broadcasting, commutator product is not reached national standard The index of EMI electromagnetism Interferences and radiation interference.

The content of the invention

The purpose of this utility model is to suppress to tie there is provided a kind of DC motor commutator electromagnetic interference for drawbacks described above Structure, inventive method is to install the electromagnetic interference produced by capacitor absorption commutator additional between two commutator segments, is in commutator A groove is formed on the inside of the commutator segment of one end, puts, is put into by equidistant between n chip capacitor correspondence each two commutator segment Solder(ing) paste, welded using reflow soldering process, then rotor coil winding is connected to correspondence position end to end, national standard is reached with this Conducted Electromagnetic Interference as defined in EM1 and Radiative EMI index.

The technical solution of the utility model is that DC motor commutator electromagnetic interference suppresses structure, it is characterised in that direct current It is that rotor coil is made up of 12 windings that machine commutator electromagnetic interference, which suppresses structure, and the commutator segment of commutator is constituted by 12, two The capacitors count installed additional between individual commutator segment is identical with the quantity of commutator segment, and the capacitor installed additional on commutator is also by 12 groups Into concrete structure is one groove of formation on the inside of the commutator segment of commutator one end, and 12 chip capacitor correspondence each twos are changed Put to equidistant between piece, be put into solder(ing) paste, welded using reflow soldering process, then rotor coil winding is end-to-end To correspondence position.

The DC motor commutator electromagnetic interference suppressing method and structure, it is characterised in that DC motor commutator electromagnetism Interference inhibiting structure formation circuit connecting method be commutator segment P1 connection rotor coils L1, rotor coil L2, capacitor C1 and Capacitor C2, rotor coil the L2 other end and the capacitor C2 other ends connect commutator segment P2, rotor coil L3 and electric capacity together Device C3, rotor coil the L3 other end and the capacitor C3 other ends connect commutator segment P3, rotor coil L4 and capacitor C4 together, The rotor coil L4 other end and the capacitor C4 other ends connects commutator segment P4, rotor coil L5 and capacitor C5, rotor together The coil L5 other end and the capacitor C5 other ends connects commutator segment P5, rotor coil L6 and capacitor C6, rotor coil together The L6 other end and the capacitor C6 other ends connects commutator segment P6, rotor coil L7 and capacitor C7 together, rotor coil L7's The other end and the capacitor C7 other ends connect commutator segment P8, rotor coil L8 and capacitor C8 together, and rotor coil L8's is another End and the capacitor C8 other ends connect commutator segment P8, rotor coil L9 and capacitor C9 together, the rotor coil L9 other end and The capacitor C9 other ends connect commutator segment P9, rotor coil L10 and capacitor C10, rotor coil the L10 other end and electricity together The container C10 other ends connect commutator segment P10, rotor coil L11 and capacitor C11, rotor coil the L11 other end and electricity together The container C11 other ends connect commutator segment P11, rotor coil L12 and capacitor C12 together, the rotor coil L12 other end and The capacitor C12 other ends connect commutator segment P12, rotor coil L1 and capacitor C1, commutator segment and rotor coil and direct current together Rotor one, commutator segment commutates between brush D1 and brush D2 when rotor is rotated, and brush D1 and brush D2 connect dc source.

Engine commutator often commutates the moment that an inductance disconnects when the utility model overcomes conventional operating, and brush is with changing Externally produce substantial amounts of electromagnetic interference to the spark produced between piece, with it is simple in construction, compact it is easy dress, it is rationally distributed, fixed The high advantage of convenience, dependable performance, precision, improves practicality and reliability, can be widely used in direct current generator field.

Brief description of the drawings

Fig. 1 DC motor commutators electromagnetic interference suppresses structural representation

P1-12 commutator segments, C1-C12 capacitors, L1-L12 rotor coils, D1-D2 brushes in Fig. 1.

Fig. 1 is that DC motor commutator electromagnetic interference suppresses structural representation, and rotor coil is made up of 12 windings, is commutated The commutator segment of device is constituted by 12, and the capacitors count installed additional between two commutator segments is identical with the quantity of commutator segment, commutator On the capacitor that installs additional also constituted by 12.

Embodiment

Fig. 1 DC motor commutators electromagnetic interference suppresses structural representation, and operation principle is added between two commutator segments Capacitor, rotor coil inductance electromotive force produces electromagnetism Interference and radiation interference in commutation when motor is rotated, and makes state Mark EMI electromagnetic interference indexs do not reach requirement, and the present invention is after installing capacitor additional between two commutator segments, to absorb commutator Produced electromagnetic interference.Embodiment is to install capacitor additional between two commutator segments, the electricity installed additional between two commutator segments Number of containers is identical with the quantity of commutator segment, and rotor coil is made up of 12 windings, and the commutator segment of commutator is constituted by 12, The capacitors count installed additional between two commutator segments is identical with the quantity of commutator segment, and the capacitor installed additional on commutator is also by 12 Composition, concrete structure is one groove of formation on the inside of the commutator segment of commutator one end, by 12 chip capacitor correspondence each twos It is equidistant between commutator segment to put, it is put into solder(ing) paste, welded using reflow soldering process, then rotor coil winding is connected end to end Be connected to correspondence position, the circuit connecting method of formation be commutator segment P1 connection rotor coils L1, rotor coil L2, capacitor C1 and Capacitor C2, rotor coil the L2 other end and the capacitor C2 other ends connect commutator segment P2, rotor coil L3 and electric capacity together Device C3, rotor coil the L3 other end and the capacitor C3 other ends connect commutator segment P3, rotor coil L4 and capacitor C4 together, The rotor coil L4 other end and the capacitor C4 other ends connects commutator segment P4, rotor coil L5 and capacitor C5, rotor together The coil L5 other end and the capacitor C5 other ends connects commutator segment P5, rotor coil L6 and capacitor C6, rotor coil together The L6 other end and the capacitor C6 other ends connects commutator segment P6, rotor coil L7 and capacitor C7 together, rotor coil L7's The other end and the capacitor C7 other ends connect commutator segment P8, rotor coil L8 and capacitor C8 together, and rotor coil L8's is another End and the capacitor C8 other ends connect commutator segment P8, rotor coil L9 and capacitor C9 together, the rotor coil L9 other end and The capacitor C9 other ends connect commutator segment P9, rotor coil L10 and capacitor C10, rotor coil the L10 other end and electricity together The container C10 other ends connect commutator segment P10, rotor coil L11 and capacitor C11, rotor coil the L11 other end and electricity together The container C11 other ends connect commutator segment P11, rotor coil L12 and capacitor C12 together, the rotor coil L12 other end and The capacitor C12 other ends connect commutator segment P12, rotor coil L1 and capacitor C1, commutator segment and rotor coil and direct current together Rotor one, commutator segment commutates between brush D1 and brush D2 when rotor is rotated, and brush D1 and brush D2 connect dc source.

Claims (2)

1. DC motor commutator electromagnetic interference suppresses structure, it is characterised in that DC motor commutator electromagnetic interference suppresses structure It is that rotor coil is made up of 12 windings, the commutator segment of commutator is constituted by 12, the capacitor installed additional between two commutator segments Quantity is identical with the quantity of commutator segment, and the capacitor installed additional on commutator is also constituted by 12, and concrete structure is in commutator one Hold and a groove is formed on the inside of commutator segment, put, be put into by equidistant between 12 chip capacitor correspondence each two commutator segments Solder(ing) paste, welded using reflow soldering process, then rotor coil winding is connected to correspondence position end to end.

2. DC motor commutator electromagnetic interference suppresses structure according to claim 1, it is characterised in that direct current generator commutates The circuit connecting method that device electromagnetic interference suppresses structure formation is commutator segment P1 connection rotor coils L1, rotor coil L2, electric capacity Device C1 and capacitor C2, rotor coil the L2 other end and the capacitor C2 other ends connect commutator segment P2, rotor coil L3 together With capacitor C3, rotor coil the L3 other end and the capacitor C3 other ends connect commutator segment P3, rotor coil L4 and electricity together Container C4, rotor coil the L4 other end and the capacitor C4 other ends connect commutator segment P4, rotor coil L5 and capacitor together C5, rotor coil the L5 other end and the capacitor C5 other ends connect commutator segment P5, rotor coil L6 and capacitor C6 together, turn The subcoil L6 other end and the capacitor C6 other ends connects commutator segment P6, rotor coil L7 and capacitor C7, rotor line together The other end and the capacitor C7 other ends for enclosing L7 connect commutator segment P8, rotor coil L8 and capacitor C8, rotor coil L8 together The other end and the capacitor C8 other ends connect commutator segment P8, rotor coil L9 and capacitor C9 together, rotor coil L9's is another One end and the capacitor C9 other ends connect commutator segment P9, rotor coil L10 and capacitor C10 together, and rotor coil L10's is another End and the capacitor C10 other ends connect commutator segment P10, rotor coil L11 and capacitor C11 together, and rotor coil L11's is another End and the capacitor C11 other ends connect commutator segment P11, rotor coil L12 and capacitor C12 together, and rotor coil L12's is another End and the capacitor C12 other ends connect commutator segment P12, rotor coil L1 and capacitor C1 together, commutator segment and rotor coil with DC motor rotor one, commutator segment commutates between brush D1 and brush D2 when rotor is rotated, and brush D1 and brush D2 connect direct current Power supply.